Bump to 3.2.0

Update from Weblate

.travis.yml

@@ -25,8 +25,6 @@ matrix:
       env: JOB=tests PRETIX_CONFIG_FILE=tests/travis_postgres.cfg
     - python: 3.5
       env: JOB=tests PRETIX_CONFIG_FILE=tests/travis_postgres.cfg
-    - python: 3.7
-      env: JOB=plugins
     - python: 3.7
       env: JOB=doc-spelling
     - python: 3.7

Dockerfile

@@ -57,6 +57,8 @@ COPY deployment/docker/nginx.conf /etc/nginx/nginx.conf
 COPY deployment/docker/production_settings.py /pretix/src/production_settings.py
 COPY src /pretix/src
 
+RUN cd /pretix/src && pip3 install .
+
 RUN chmod +x /usr/local/bin/pretix && \
     rm /etc/nginx/sites-enabled/default && \
     cd /pretix/src && \

doc/admin/config.rst

@@ -78,6 +78,15 @@ Example::
     Enables or disables nagging staff users for leaving comments on their sessions for auditability.
     Defaults to ``off``.
 
+``obligatory_2fa``
+    Enables or disables obligatory usage of Two-Factor Authentication for users of the pretix backend.
+    Defaults to ``False``
+
+``trust_x_forwarded_for``
+    Specifies whether the ``X-Forwarded-For`` header can be trusted. Only set to ``on`` if you have a reverse
+    proxy that actively removes and re-adds the header to make sure the correct client IP is the first value.
+    Defaults to ``off``.
+
 
 Locale settings
 ---------------

doc/api/guides/custom_checkout.rst

@@ -0,0 +1,132 @@
+Creating an external checkout process
+=====================================
+
+Occasionally, we get asked whether it is possible to just use pretix' powerful backend as a ticketing engine but use
+a fully-customized checkout process that only communicates via the API. This is possible, but with a few limitations.
+If you go down this route, you will miss out on many of pretix features and safeguards, as well as the added flexibility
+by most of pretix' plugins. We strongly recommend to talk this through with us before you decide this is the way to go.
+
+However, this is really useful if you need to tightly integrate pretix into existing web applications that e.g. control
+the pricing of your products in a way that cannot be mapped to pretix' product structures.
+
+Creating orders
+---------------
+
+After letting your user select the products to  buy in your application, you should create a new order object inside
+pretix. Below, you can see an example of such an order, but most fields are optional and there are some more features
+supported. Read :ref:`rest-orders-create` to learn more about this endpoint.
+
+Please note that this endpoint assumes trustworthy input for the most part. By default, the endpoint checks that
+you do not exceed any quotas, do not sell any seats twice, or do not use any redeemed vouchers. However, it will not
+complain about violation of any other availability constraints, such as violation of time frames or minimum/maximum
+amounts of either your product or event. Bundled products will not be added in automatically and fees will not be
+calculated automatically.
+
+.. sourcecode:: http
+
+    POST /api/v1/organizers/democon/events/3vjrh/orders/ HTTP/1.1
+    Host: test.pretix.eu
+    Accept: application/json, text/javascript
+    Content-Type: application/json
+    Authorization: …
+
+    {
+      "email": "dummy@example.org",
+      "locale": "en",
+      "sales_channel": "web",
+      "payment_provider": "banktransfer",
+      "invoice_address": {
+        "is_business": false,
+        "company": "Sample company",
+        "name_parts": {"full_name": "John Doe"},
+        "street": "Sesam Street 12",
+        "zipcode": "12345",
+        "city": "Sample City",
+        "country": "US",
+        "state": "NY",
+        "internal_reference": "",
+        "vat_id": ""
+      },
+      "positions": [
+        {
+          "item": 21,
+          "variation": null,
+          "attendee_name_parts": {
+            "full_name": "Peter"
+          },
+          "answers": [
+            {
+              "question": 1,
+              "answer": "23",
+              "options": []
+            }
+          ],
+          "subevent": null
+        }
+      ],
+      "fees": []
+    }
+
+You will be returned a full order object that you can inspect, store, or use to build emails or confirmation pages for
+the user. If you don't want to do that yourself, it will also contain the URL to our confirmation page in the ``url``
+attribute. If you pass the ``"send_mail": true`` option, pretix will also send order confirmations for you.
+
+Handling payments yourself
+--------------------------
+
+If you want to handle payments in your application, you can either just create the orders with status "paid" or you can
+create them in "pending" state (the default) and later confirm the payment. We strongly advise to use the payment
+provider ``"manual"`` in this case to avoid interference with payment code with pretix.
+
+However, it is often unfeasible to implement the payment process yourself, and it also requires you to give up a
+lot of pretix functionality, such as automatic refunds. Therefore, it is also possible to utilize pretix' native
+payment process even in this case:
+
+Using pretix payment providers
+------------------------------
+
+If you passed a ``payment_provider`` during order creation above, pretix will have created a payment object with state
+``created`` that you can see in the returned order object. This payment object will have an attribute ``payment_url``
+that you can use to let the user pay. For example, you could link or redirect to this page.
+
+If you want the user to return to your application after the payment is complete, you can pass a query parameter
+``return_url``. To prepare your event for this, open your event in the pretix backend and go to "Settings", then
+"Plugins". Enable the plugin "Redirection from order page". Then, go to the new page "Settings", then "Redirection".
+Enter the base URL of your web application. This will allow you to redirect to pages under this base URL later on.
+For example, if you want users to be redirected to ``https://example.org/order/return?tx_id=1234``, you could now
+either enter ``https://example.org`` or ``https://example.org/order/``.
+
+The user will be redirected back to your page instead of pretix' order confirmation page after the payment,
+**regardless of whether it was successful or not**. Make sure you use our API to check if the payment actually
+worked! Your final URL could look like this::
+
+    https://test.pretix.eu/democon/3vjrh/order/NSLEZ/ujbrnsjzbq4dzhck/pay/123/?return_url=https%3A%2F%2Fexample.org%2Forder%2Freturn%3Ftx_id%3D1234
+
+You can also embed this page in an ``<iframe>`` instead. Note, however, that this causes problems with some payment
+methods such as PayPal which do not allow being opened in an iframe. pretix can partly work around these issues by
+opening a new window, but will only to so if you also append an ``iframe=1`` parameter to the URL::
+
+    https://test.pretix.eu/democon/3vjrh/order/NSLEZ/ujbrnsjzbq4dzhck/pay/123/?return_url=https%3A%2F%2Fexample.org%2Forder%2Freturn%3Ftx_id%3D1234&iframe=1
+
+If you did **not** pass a payment method since you want us to ask the user which payment method they want to use, you
+need to construct the URL from the ``url`` attribute of the order and the sub-path ``pay/change```. For example, you
+would end up with the following URL::
+
+    https://test.pretix.eu/democon/3vjrh/order/NSLEZ/ujbrnsjzbq4dzhck/pay/change
+
+Of course, you can also use the ``iframe`` and ``return_url`` parameters here.
+
+Optional: Cart reservations
+---------------------------
+
+Creating orders is an atomic operation: The order is either created as a whole or not at all. However, pretix'
+built-in checkout automatically reserves tickets in a user's cart for a configurable amount of time to ensure users
+will actually get their tickets once they started entering all their details. If you want a similar behavior in your
+application, you need to create :ref:`rest-carts` through the API.
+
+When creating your order, you can pass a ``consume_carts`` parameter with the cart ID(s) of your user. This way, the
+quota reserved by the cart will be credited towards the order and the carts will be destroyed if (and only if) the
+order creation succeeds.
+
+Cart creation is currently even more limited than the order creation endpoints, as cart creation currently does not
+support vouchers or automatic price calculation. If you require these features, please get in touch with us.

doc/api/guides/index.rst

@@ -0,0 +1,11 @@
+.. _`rest-api-guides`:
+
+API Usage Guides
+================
+
+This part of the documentation contains how-to guides on some special use cases of our API.
+
+.. toctree::
+   :maxdepth: 2
+
+   custom_checkout

doc/api/index.rst

@@ -18,3 +18,4 @@ in functionality over time.
    resources/index
    ratelimit
    webhooks
+   guides/index

doc/api/resources/carts.rst

@@ -36,12 +36,20 @@ answers                               list of objects            Answers to user
 ├ question_identifier                 string                     The question's ``identifier`` field
 ├ options                             list of integers           Internal IDs of selected option(s)s (only for choice types)
 └ option_identifiers                  list of strings            The ``identifier`` fields of the selected option(s)s
+seat                                  objects                    The assigned seat. Can be ``null``.
+├ id                                  integer                    Internal ID of the seat instance
+├ name                                string                     Human-readable seat name
+└ seat_guid                           string                     Identifier of the seat within the seating plan
 ===================================== ========================== =======================================================
 
 .. versionchanged:: 1.17
 
    This resource has been added.
 
+.. versionchanged:: 3.0
+
+   This ``seat`` attribute has been added.
+
 
 Cart position endpoints
 -----------------------
@@ -87,6 +95,7 @@ Cart position endpoints
             "datetime": "2018-06-11T10:00:00Z",
             "expires": "2018-06-11T10:00:00Z",
             "includes_tax": true,
+            "seat": null,
             "answers": []
           }
         ]
@@ -132,6 +141,7 @@ Cart position endpoints
         "datetime": "2018-06-11T10:00:00Z",
         "expires": "2018-06-11T10:00:00Z",
         "includes_tax": true,
+        "seat": null,
         "answers": []
       }
 
@@ -178,6 +188,7 @@ Cart position endpoints
    * ``item``
    * ``variation`` (optional)
    * ``price``
+   * ``seat`` (The ``seat_guid`` attribute of a seat. Required when the specified ``item`` requires a seat, otherwise must be ``null``.)
    * ``attendee_name`` **or** ``attendee_name_parts`` (optional)
    * ``attendee_email`` (optional)
    * ``subevent`` (optional)
@@ -196,7 +207,7 @@ Cart position endpoints
       POST /api/v1/organizers/bigevents/events/sampleconf/cartpositions/ HTTP/1.1
       Host: pretix.eu
       Accept: application/json, text/javascript
-      Content: application/json
+      Content-Type: application/json
 
       {
         "item": 1,

doc/api/resources/categories.rst

@@ -131,7 +131,7 @@ Endpoints
       POST /api/v1/organizers/bigevents/events/sampleconf/categories/ HTTP/1.1
       Host: pretix.eu
       Accept: application/json, text/javascript
-      Content: application/json
+      Content-Type: application/json
 
       {
         "name": {"en": "Tickets"},

doc/api/resources/checkinlists.rst

@@ -1,3 +1,5 @@
+.. spelling:: checkin
+
 Check-in lists
 ==============
 
@@ -27,6 +29,7 @@ subevent                              integer                    ID of the date
 position_count                        integer                    Number of tickets that match this list (read-only).
 checkin_count                         integer                    Number of check-ins performed on this list (read-only).
 include_pending                       boolean                    If ``true``, the check-in list also contains tickets from orders in pending state.
+auto_checkin_sales_channels           list of strings            All items on the check-in list will be automatically marked as checked-in when purchased through any of the listed sales channels.
 ===================================== ========================== =======================================================
 
 .. versionchanged:: 1.10
@@ -41,6 +44,10 @@ include_pending                       boolean                    If ``true``, th
 
    The ``include_pending`` field has been added.
 
+.. versionchanged:: 3.2
+
+    The ``auto_checkin_sales_channels`` field has been added.
+
 Endpoints
 ---------
 
@@ -81,7 +88,10 @@ Endpoints
             "all_products": true,
             "limit_products": [],
             "include_pending": false,
-            "subevent": null
+            "subevent": null,
+            "auto_checkin_sales_channels": [
+              "pretixpos"
+            ]
           }
         ]
       }
@@ -122,7 +132,10 @@ Endpoints
         "all_products": true,
         "limit_products": [],
         "include_pending": false,
-        "subevent": null
+        "subevent": null,
+        "auto_checkin_sales_channels": [
+          "pretixpos"
+        ]
       }
 
    :param organizer: The ``slug`` field of the organizer to fetch
@@ -209,13 +222,16 @@ Endpoints
       POST /api/v1/organizers/bigevents/events/sampleconf/checkinlists/ HTTP/1.1
       Host: pretix.eu
       Accept: application/json, text/javascript
-      Content: application/json
+      Content-Type: application/json
 
       {
         "name": "VIP entry",
         "all_products": false,
         "limit_products": [1, 2],
-        "subevent": null
+        "subevent": null,
+        "auto_checkin_sales_channels": [
+          "pretixpos"
+        ]
       }
 
    **Example response**:
@@ -234,7 +250,10 @@ Endpoints
         "all_products": false,
         "limit_products": [1, 2],
         "include_pending": false,
-        "subevent": null
+        "subevent": null,
+        "auto_checkin_sales_channels": [
+          "pretixpos"
+        ]
       }
 
    :param organizer: The ``slug`` field of the organizer of the event/item to create a list for
@@ -283,7 +302,10 @@ Endpoints
         "all_products": false,
         "limit_products": [1, 2],
         "include_pending": false,
-        "subevent": null
+        "subevent": null,
+        "auto_checkin_sales_channels": [
+          "pretixpos"
+        ]
       }
 
    :param organizer: The ``slug`` field of the organizer to modify
@@ -342,6 +364,11 @@ Order position endpoints
    ``ignore_status`` filter. The ``attendee_name`` field is now "smart" (see below) and the redemption endpoint
    returns ``400`` instead of ``404`` on tickets which are known but not paid.
 
+.. versionchanged:: 3.2
+
+    The ``checkins`` dict now also contains a ``auto_checked_in`` value to indicate if the check-in has been performed
+    automatically by the system.
+
 .. http:get:: /api/v1/organizers/(organizer)/events/(event)/checkinlists/(list)/positions/
 
    Returns a list of all order positions within a given event. The result is the same as
@@ -396,10 +423,12 @@ Order position endpoints
             "addon_to": null,
             "subevent": null,
             "pseudonymization_id": "MQLJvANO3B",
+            "seat": null,
             "checkins": [
               {
                 "list": 1,
-                "datetime": "2017-12-25T12:45:23Z"
+                "datetime": "2017-12-25T12:45:23Z",
+                "auto_checked_in": true
               }
             ],
             "answers": [
@@ -505,10 +534,12 @@ Order position endpoints
         "addon_to": null,
         "subevent": null,
         "pseudonymization_id": "MQLJvANO3B",
+        "seat": null,
         "checkins": [
           {
             "list": 1,
-            "datetime": "2017-12-25T12:45:23Z"
+            "datetime": "2017-12-25T12:45:23Z",
+            "auto_checked_in": true
           }
         ],
         "answers": [
@@ -546,6 +577,8 @@ Order position endpoints
                                        you do not implement question handling in your user interface, you **must**
                                        set this to ``false``. In that case, questions will just be ignored. Defaults
                                        to ``true``.
+   :<json boolean canceled_supported: When this parameter is set to ``true``, the response code ``canceled`` may be
+                                      returned. Otherwise, canceled orders will return ``unpaid``.
    :<json datetime datetime: Specifies the datetime of the check-in. If not supplied, the current time will be used.
    :<json boolean force: Specifies that the check-in should succeed regardless of previous check-ins or required
                          questions that have not been filled. Defaults to ``false``.
@@ -574,6 +607,7 @@ Order position endpoints
         "nonce": "Pvrk50vUzQd0DhdpNRL4I4OcXsvg70uA",
         "datetime": null,
         "questions_supported": true,
+        "canceled_supported": true,
         "answers": {
           "4": "XS"
         }
@@ -657,7 +691,9 @@ Order position endpoints
 
    Possible error reasons:
 
-   * ``unpaid`` - Ticket is not paid for or has been refunded
+   * ``unpaid`` - Ticket is not paid for
+   * ``canceled`` – Ticket is canceled or expired. This reason is only sent when your request sets
+     ``canceled_supported`` to ``true``, otherwise these orders return ``unpaid``.
    * ``already_redeemed`` - Ticket already has been redeemed
    * ``product`` - Tickets with this product may not be scanned at this device
 

doc/api/resources/events.rst

@@ -27,9 +27,13 @@ presale_end                           datetime                   The date at whi
 location                              multi-lingual string       The event location (or ``null``)
 has_subevents                         boolean                    ``true`` if the event series feature is active for this
                                                                  event. Cannot change after event is created.
-meta_data                             dict                       Values set for organizer-specific meta data parameters.
+meta_data                             object                     Values set for organizer-specific meta data parameters.
 plugins                               list                       A list of package names of the enabled plugins for this
                                                                  event.
+seating_plan                          integer                    If reserved seating is in use, the ID of a seating
+                                                                 plan. Otherwise ``null``.
+seat_category_mapping                 object                     An object mapping categories of the seating plan
+                                                                 (strings) to items in the event (integers or ``null``).
 ===================================== ========================== =======================================================
 
 
@@ -54,6 +58,10 @@ plugins                               list                       A list of packa
 
     When cloning events, the ``testmode`` attribute will now be cloned, too.
 
+.. versionchanged:: 3.0
+
+   The attributes ``seating_plan`` and ``seat_category_mapping`` have been added.
+
 Endpoints
 ---------
 
@@ -99,6 +107,8 @@ Endpoints
             "location": null,
             "has_subevents": false,
             "meta_data": {},
+            "seating_plan": null,
+            "seat_category_mapping": {},
             "plugins": [
               "pretix.plugins.banktransfer"
               "pretix.plugins.stripe"
@@ -160,6 +170,8 @@ Endpoints
         "presale_end": null,
         "location": null,
         "has_subevents": false,
+        "seating_plan": null,
+        "seat_category_mapping": {},
         "meta_data": {},
         "plugins": [
           "pretix.plugins.banktransfer"
@@ -191,7 +203,7 @@ Endpoints
       POST /api/v1/organizers/bigevents/events/ HTTP/1.1
       Host: pretix.eu
       Accept: application/json, text/javascript
-      Content: application/json
+      Content-Type: application/json
 
       {
         "name": {"en": "Sample Conference"},
@@ -205,6 +217,8 @@ Endpoints
         "is_public": false,
         "presale_start": null,
         "presale_end": null,
+        "seating_plan": null,
+        "seat_category_mapping": {},
         "location": null,
         "has_subevents": false,
         "meta_data": {},
@@ -235,6 +249,8 @@ Endpoints
         "presale_start": null,
         "presale_end": null,
         "location": null,
+        "seating_plan": null,
+        "seat_category_mapping": {},
         "has_subevents": false,
         "meta_data": {},
         "plugins": [
@@ -269,7 +285,7 @@ Endpoints
       POST /api/v1/organizers/bigevents/events/sampleconf/clone/ HTTP/1.1
       Host: pretix.eu
       Accept: application/json, text/javascript
-      Content: application/json
+      Content-Type: application/json
 
       {
         "name": {"en": "Sample Conference"},
@@ -284,6 +300,8 @@ Endpoints
         "presale_start": null,
         "presale_end": null,
         "location": null,
+        "seating_plan": null,
+        "seat_category_mapping": {},
         "has_subevents": false,
         "meta_data": {},
         "plugins": [
@@ -314,6 +332,8 @@ Endpoints
         "presale_end": null,
         "location": null,
         "has_subevents": false,
+        "seating_plan": null,
+        "seat_category_mapping": {},
         "meta_data": {},
         "plugins": [
           "pretix.plugins.stripe",
@@ -342,7 +362,7 @@ Endpoints
       PATCH /api/v1/organizers/bigevents/events/sampleconf/ HTTP/1.1
       Host: pretix.eu
       Accept: application/json, text/javascript
-      Content: application/json
+      Content-Type: application/json
 
       {
         "plugins": [
@@ -375,6 +395,8 @@ Endpoints
         "presale_end": null,
         "location": null,
         "has_subevents": false,
+        "seating_plan": null,
+        "seat_category_mapping": {},
         "meta_data": {},
         "plugins": [
           "pretix.plugins.banktransfer",

doc/api/resources/index.rst

@@ -23,4 +23,5 @@ Resources and endpoints
    waitinglist
    carts
    webhooks
+   seatingplans
    billing_invoices

doc/api/resources/item_add-ons.rst

@@ -134,7 +134,7 @@ Endpoints
       POST /api/v1/organizers/(organizer)/events/(event)/items/(item)/addons/ HTTP/1.1
       Host: pretix.eu
       Accept: application/json, text/javascript
-      Content: application/json
+      Content-Type: application/json
 
       {
         "addon_category": 1,

doc/api/resources/item_bundles.rst

@@ -134,7 +134,7 @@ Endpoints
       POST /api/v1/organizers/(organizer)/events/(event)/items/(item)/bundles/ HTTP/1.1
       Host: pretix.eu
       Accept: application/json, text/javascript
-      Content: application/json
+      Content-Type: application/json
 
       {
         "bundled_item": 3,

doc/api/resources/item_variations.rst

@@ -152,7 +152,7 @@ Endpoints
       POST /api/v1/organizers/bigevents/events/sampleconf/items/1/variations/ HTTP/1.1
       Host: pretix.eu
       Accept: application/json, text/javascript
-      Content: application/json
+      Content-Type: application/json
 
       {
         "value": {"en": "Student"},

doc/api/resources/items.rst

@@ -44,6 +44,9 @@ available_from                        datetime                   The first date
                                                                  (or ``null``).
 available_until                       datetime                   The last date time at which this item can be bought
                                                                  (or ``null``).
+hidden_if_available                   integer                    The internal ID of a quota object, or ``null``. If
+                                                                 set, this item won't be shown publicly as long as this
+                                                                 quota is available.
 require_voucher                       boolean                    If ``true``, this item can only be bought using a
                                                                  voucher that is specifically assigned to this item.
 hide_without_voucher                  boolean                    If ``true``, this item is only shown during the voucher
@@ -72,6 +75,10 @@ generate_tickets                      boolean                    If ``false``, t
                                                                  non-admission or add-on product, regardless of event
                                                                  settings. If this is ``null``, regular ticketing
                                                                  rules apply.
+allow_waitinglist                     boolean                    If ``false``, no waiting list will be shown for this
+                                                                 product when it is sold out.
+show_quota_left                       boolean                    Publicly show how many tickets are still available.
+                                                                 If this is ``null``, the event default is used.
 has_variations                        boolean                    Shows whether or not this item has variations.
 variations                            list of objects            A list with one object for each variation of this item.
                                                                  Can be empty. Only writable during creation,
@@ -142,6 +149,10 @@ bundles                               list of objects            Definition of b
 
    The ``bundles`` and ``require_bundling`` attributes have been added.
 
+.. versionchanged:: 3.0
+
+   The ``show_quota_left``, ``allow_waitinglist``, and ``hidden_if_available`` attributes have been added.
+
 Notes
 -----
 
@@ -199,6 +210,7 @@ Endpoints
             "picture": null,
             "available_from": null,
             "available_until": null,
+            "hidden_if_available": null,
             "require_voucher": false,
             "hide_without_voucher": false,
             "allow_cancel": true,
@@ -207,6 +219,8 @@ Endpoints
             "checkin_attention": false,
             "has_variations": false,
             "generate_tickets": null,
+            "allow_waitinglist": true,
+            "show_quota_left": null,
             "require_approval": false,
             "require_bundling": false,
             "variations": [
@@ -290,10 +304,13 @@ Endpoints
         "picture": null,
         "available_from": null,
         "available_until": null,
+        "hidden_if_available": null,
         "require_voucher": false,
         "hide_without_voucher": false,
         "allow_cancel": true,
         "generate_tickets": null,
+        "allow_waitinglist": true,
+        "show_quota_left": null,
         "min_per_order": null,
         "max_per_order": null,
         "checkin_attention": false,
@@ -342,7 +359,7 @@ Endpoints
       POST /api/v1/organizers/bigevents/events/sampleconf/items/ HTTP/1.1
       Host: pretix.eu
       Accept: application/json, text/javascript
-      Content: application/json
+      Content-Type: application/json
 
       {
         "id": 1,
@@ -362,10 +379,13 @@ Endpoints
         "picture": null,
         "available_from": null,
         "available_until": null,
+        "hidden_if_available": null,
         "require_voucher": false,
         "hide_without_voucher": false,
         "allow_cancel": true,
         "generate_tickets": null,
+        "allow_waitinglist": true,
+        "show_quota_left": null,
         "min_per_order": null,
         "max_per_order": null,
         "checkin_attention": false,
@@ -421,12 +441,15 @@ Endpoints
         "picture": null,
         "available_from": null,
         "available_until": null,
+        "hidden_if_available": null,
         "require_voucher": false,
         "hide_without_voucher": false,
         "allow_cancel": true,
         "min_per_order": null,
         "max_per_order": null,
         "generate_tickets": null,
+        "allow_waitinglist": true,
+        "show_quota_left": null,
         "checkin_attention": false,
         "has_variations": true,
         "require_approval": false,
@@ -512,9 +535,12 @@ Endpoints
         "picture": null,
         "available_from": null,
         "available_until": null,
+        "hidden_if_available": null,
         "require_voucher": false,
         "hide_without_voucher": false,
         "generate_tickets": null,
+        "allow_waitinglist": true,
+        "show_quota_left": null,
         "allow_cancel": true,
         "min_per_order": null,
         "max_per_order": null,

doc/api/resources/orders.rst

@@ -53,7 +53,9 @@ invoice_address                       object                     Invoice address
 ├ street                              string                     Customer street
 ├ zipcode                             string                     Customer ZIP code
 ├ city                                string                     Customer city
-├ country                             string                     Customer country
+├ country                             string                     Customer country code
+├ state                               string                     Customer state (ISO 3166-2 code). Only supported in
+                                                                 AU, BR, CA, CN, MY, MX, and US.
 ├ internal_reference                  string                     Customer's internal reference to be printed on the invoice
 ├ vat_id                              string                     Customer VAT ID
 └ vat_id_validated                    string                     ``true``, if the VAT ID has been validated against the
@@ -82,6 +84,7 @@ require_approval                      boolean                    If ``true`` and
                                                                  needs approval by an organizer before it can
                                                                  continue. If ``true`` and the order is canceled,
                                                                  this order has been denied by the event organizer.
+url                                   string                     The full URL to the order confirmation page
 payments                              list of objects            List of payment processes (see below)
 refunds                               list of objects            List of refund processes (see below)
 last_modified                         datetime                   Last modification of this object
@@ -137,6 +140,12 @@ last_modified                         datetime                   Last modificati
 
    The ``testmode`` attribute has been added and ``DELETE`` has been implemented for orders.
 
+.. versionchanged:: 3.1:
+
+   The ``invoice_address.state`` and ``url`` attributes have been added. When creating orders through the API,
+   vouchers are now supported and many fields are now optional.
+
+
 .. _order-position-resource:
 
 Order position resource
@@ -166,7 +175,8 @@ subevent                              integer                    ID of the date
 pseudonymization_id                   string                     A random ID, e.g. for use in lead scanning apps
 checkins                              list of objects            List of check-ins with this ticket
 ├ list                                integer                    Internal ID of the check-in list
-└ datetime                            datetime                   Time of check-in
+├ datetime                            datetime                   Time of check-in
+└ auto_checked_in                     boolean                    Indicates if this check-in been performed automatically by the system
 downloads                             list of objects            List of ticket download options
 ├ output                              string                     Ticket output provider (e.g. ``pdf``, ``passbook``)
 └ url                                 string                     Download URL
@@ -176,6 +186,10 @@ answers                               list of objects            Answers to user
 ├ question_identifier                 string                     The question's ``identifier`` field
 ├ options                             list of integers           Internal IDs of selected option(s)s (only for choice types)
 └ option_identifiers                  list of strings            The ``identifier`` fields of the selected option(s)s
+seat                                  objects                    The assigned seat. Can be ``null``.
+├ id                                  integer                    Internal ID of the seat instance
+├ name                                string                     Human-readable seat name
+└ seat_guid                           string                     Identifier of the seat within the seating plan
 pdf_data                              object                     Data object required for ticket PDF generation. By default,
                                                                  this field is missing. It will be added only if you add the
                                                                  ``pdf_data=true`` query parameter to your request.
@@ -197,6 +211,14 @@ pdf_data                              object                     Data object req
 
   The attributes ``pseudonymization_id`` and ``pdf_data`` have been added.
 
+.. versionchanged:: 3.0
+
+  The attribute ``seat`` has been added.
+
+.. versionchanged:: 3.2
+
+  The value ``auto_checked_in`` has been added to the ``checkins``-attribute.
+
 .. _order-payment-resource:
 
 Order payment resource
@@ -213,13 +235,27 @@ amount                                money (string)             Payment amount
 created                               datetime                   Date and time of creation of this payment
 payment_date                          datetime                   Date and time of completion of this payment (or ``null``)
 provider                              string                     Identification string of the payment provider
+payment_url                           string                     The URL where an user can continue with the payment (or ``null``)
+details                               object                     Payment-specific information. This is a dictionary
+                                                                 with various fields that can be different between
+                                                                 payment providers, versions, payment states, etc. If
+                                                                 you read this field, you always need to be able to
+                                                                 deal with situations where values that you expect are
+                                                                 missing. Mostly, the field contains various IDs that
+                                                                 can be used for matching with other systems. If a
+                                                                 payment provider does not implement this feature,
+                                                                 the object is empty.
 ===================================== ========================== =======================================================
 
 .. versionchanged:: 2.0
 
   This resource has been added.
 
-.. _order-payment-resource:
+.. versionchanged:: 3.1
+
+  The attributes ``payment_url`` and ``details`` have been added.
+
+.. _order-refund-resource:
 
 Order refund resource
 ---------------------
@@ -280,6 +316,7 @@ List of all orders
             "status": "p",
             "testmode": false,
             "secret": "k24fiuwvu8kxz3y1",
+            "url": "https://test.pretix.eu/dummy/dummy/order/ABC12/k24fiuwvu8kxz3y1/",
             "email": "tester@example.org",
             "locale": "en",
             "sales_channel": "web",
@@ -302,7 +339,8 @@ List of all orders
                 "street": "Test street 12",
                 "zipcode": "12345",
                 "city": "Testington",
-                "country": "Testikistan",
+                "country": "DE",
+                "state": "",
                 "internal_reference": "",
                 "vat_id": "EU123456789",
                 "vat_id_validated": false
@@ -328,10 +366,12 @@ List of all orders
                 "addon_to": null,
                 "subevent": null,
                 "pseudonymization_id": "MQLJvANO3B",
+                "seat": null,
                 "checkins": [
                   {
                     "list": 44,
-                    "datetime": "2017-12-25T12:45:23Z"
+                    "datetime": "2017-12-25T12:45:23Z",
+                    "auto_checked_in": false
                   }
                 ],
                 "answers": [
@@ -364,6 +404,8 @@ List of all orders
                 "amount": "23.00",
                 "created": "2017-12-01T10:00:00Z",
                 "payment_date": "2017-12-04T12:13:12Z",
+                "payment_url": null,
+                "details": {},
                 "provider": "banktransfer"
               }
             ],
@@ -422,6 +464,7 @@ Fetching individual orders
         "status": "p",
         "testmode": false,
         "secret": "k24fiuwvu8kxz3y1",
+        "url": "https://test.pretix.eu/dummy/dummy/order/ABC12/k24fiuwvu8kxz3y1/",
         "email": "tester@example.org",
         "locale": "en",
         "sales_channel": "web",
@@ -444,7 +487,8 @@ Fetching individual orders
             "street": "Test street 12",
             "zipcode": "12345",
             "city": "Testington",
-            "country": "Testikistan",
+            "country": "DE",
+            "state": "",
             "internal_reference": "",
             "vat_id": "EU123456789",
             "vat_id_validated": false
@@ -470,10 +514,12 @@ Fetching individual orders
             "addon_to": null,
             "subevent": null,
             "pseudonymization_id": "MQLJvANO3B",
+            "seat": null,
             "checkins": [
               {
                 "list": 44,
-                "datetime": "2017-12-25T12:45:23Z"
+                "datetime": "2017-12-25T12:45:23Z",
+                "auto_checked_in": false
               }
             ],
             "answers": [
@@ -506,6 +552,8 @@ Fetching individual orders
             "amount": "23.00",
             "created": "2017-12-01T10:00:00Z",
             "payment_date": "2017-12-04T12:13:12Z",
+            "payment_url": null,
+            "details": {},
             "provider": "banktransfer"
           }
         ],
@@ -681,6 +729,8 @@ Deleting orders
    :statuscode 403: The requested organizer/event does not exist **or** you have no permission to delete this resource **or** the order may not be deleted.
    :statuscode 404: The requested order does not exist.
 
+.. _rest-orders-create:
+
 Creating orders
 ---------------
 
@@ -688,8 +738,6 @@ Creating orders
 
    Creates a new order.
 
-   .. warning:: This endpoint is considered **experimental**. It might change at any time without prior notice.
-
    .. warning::
 
        This endpoint is intended for advanced users. It is not designed to be used to build your own shop frontend,
@@ -708,23 +756,17 @@ Creating orders
 
        * does not validate the number of items per order or the number of times an item can be included in an order
 
-       * does not validate any requirements related to add-on products
+       * does not validate any requirements related to add-on products and does not add bundled products automatically
 
-       * does not check or calculate prices but believes any prices you send
+       * does not check prices but believes any prices you send
-
-       * does not support the redemption of vouchers
 
        * does not prevent you from buying items that can only be bought with a voucher
 
-       * does not calculate fees
+       * does not calculate fees automatically
 
        * does not allow to pass data to plugins and will therefore cause issues with some plugins like the shipping
          module
 
-       * does not send order confirmations via email
-
-       * does not support reverse charge taxation
-
        * does not support file upload questions
 
    You can supply the following fields of the resource:
@@ -737,14 +779,14 @@ Creating orders
      then call the ``mark_paid`` API method.
    * ``testmode`` (optional) – Defaults to ``false``
    * ``consume_carts`` (optional) – A list of cart IDs. All cart positions with these IDs will be deleted if the
-     order creation is successful. Any quotas that become free by this operation will be credited to your order
+     order creation is successful. Any quotas or seats that become free by this operation will be credited to your order
      creation.
    * ``email``
    * ``locale``
    * ``sales_channel``
-   * ``payment_provider`` – The identifier of the payment provider set for this order. This needs to be an existing
+   * ``payment_provider`` (optional) – The identifier of the payment provider set for this order. This needs to be an
-     payment provider. You should use ``"free"`` for free orders, and we strongly advise to use ``"manual"`` for all
+    existing payment provider. You should use ``"free"`` for free orders, and we strongly advise to use ``"manual"``
-     orders you create as paid.
+    for all orders you create as paid.
    * ``payment_info`` (optional) – You can pass a nested JSON object that will be set as the internal ``info``
      value of the payment object that will be created. How this value is handled is up to the payment provider and you
      should only use this if you know the specific payment provider in detail. Please keep in mind that the payment
@@ -762,16 +804,22 @@ Creating orders
       * ``zipcode``
       * ``city``
       * ``country``
+      * ``state``
       * ``internal_reference``
       * ``vat_id``
+      * ``vat_id_validated`` (optional) – If you need support for reverse charge (rarely the case), you need to check
+       yourself if the passed VAT ID is a valid EU VAT ID. In that case, set this to ``true``. Only valid VAT IDs will
+       trigger reverse charge taxation. Don't forget to set ``is_business`` as well!
 
    * ``positions``
 
       * ``positionid`` (optional, see below)
       * ``item``
       * ``variation``
-      * ``price``
+      * ``price`` (optional, if set to ``null`` or missing the price will be computed from the given product)
+      * ``seat`` (The ``seat_guid`` attribute of a seat. Required when the specified ``item`` requires a seat, otherwise must be ``null``.)
       * ``attendee_name`` **or** ``attendee_name_parts``
+      * ``voucher`` (optional, the ``code`` attribute of a valid voucher)
       * ``attendee_email``
       * ``secret`` (optional)
       * ``addon_to`` (optional, see below)
@@ -791,6 +839,8 @@ Creating orders
       * ``tax_rule``
 
    * ``force`` (optional). If set to ``true``, quotas will be ignored.
+   * ``send_mail`` (optional). If set to ``true``, the same emails will be sent as for a regular order. Defaults to
+     ``false``.
 
    If you want to use add-on products, you need to set the ``positionid`` fields of all positions manually
    to incrementing integers starting with ``1``. Then, you can reference one of these
@@ -828,6 +878,7 @@ Creating orders
           "zipcode": "12345",
           "city": "Sample City",
           "country": "UK",
+          "state": "",
           "internal_reference": "",
           "vat_id": ""
         },
@@ -851,7 +902,7 @@ Creating orders
             ],
             "subevent": null
           }
-        ],
+        ]
       }
 
    **Example response**:
@@ -1242,6 +1293,11 @@ List of all order positions
    The order positions endpoint has been extended by the filter queries ``voucher``, ``voucher__code`` and
    ``pseudonymization_id``.
 
+.. versionchanged:: 3.2
+
+  The value ``auto_checked_in`` has been added to the ``checkins``-attribute.
+
+
 .. note:: Individually canceled order positions are currently not visible via the API at all.
 
 .. http:get:: /api/v1/organizers/(organizer)/events/(event)/orderpositions/
@@ -1287,12 +1343,14 @@ List of all order positions
             "tax_value": "0.00",
             "secret": "z3fsn8jyufm5kpk768q69gkbyr5f4h6w",
             "pseudonymization_id": "MQLJvANO3B",
+            "seat": null,
             "addon_to": null,
             "subevent": null,
             "checkins": [
               {
                 "list": 44,
-                "datetime": "2017-12-25T12:45:23Z"
+                "datetime": "2017-12-25T12:45:23Z",
+                "auto_checked_in": false
               }
             ],
             "answers": [
@@ -1389,10 +1447,12 @@ Fetching individual positions
         "addon_to": null,
         "subevent": null,
         "pseudonymization_id": "MQLJvANO3B",
+        "seat": null,
         "checkins": [
           {
             "list": 44,
-            "datetime": "2017-12-25T12:45:23Z"
+            "datetime": "2017-12-25T12:45:23Z",
+            "auto_checked_in": false
           }
         ],
         "answers": [
@@ -1535,6 +1595,8 @@ Order payment endpoints
             "amount": "23.00",
             "created": "2017-12-01T10:00:00Z",
             "payment_date": "2017-12-04T12:13:12Z",
+            "payment_url": null,
+            "details": {},
             "provider": "banktransfer"
           }
         ]
@@ -1575,6 +1637,8 @@ Order payment endpoints
         "amount": "23.00",
         "created": "2017-12-01T10:00:00Z",
         "payment_date": "2017-12-04T12:13:12Z",
+        "payment_url": null,
+        "details": {},
         "provider": "banktransfer"
       }
 

doc/api/resources/questions.rst

@@ -41,6 +41,8 @@ ask_during_checkin                    boolean                    If ``true``, th
                                                                  the ticket instead.
 hidden                                boolean                    If ``true``, the question will only be shown in the
                                                                  backend.
+print_on_invoice                      boolean                    If ``true``, the question will only be shown on
+                                                                 invoices.
 options                               list of objects            In case of question type ``C`` or ``M``, this lists the
                                                                  available objects. Only writable during creation,
                                                                  use separate endpoint to modify this later.
@@ -54,11 +56,12 @@ dependency_question                   integer                    Internal ID of
                                                                  this attribute is set to the value given in
                                                                  ``dependency_value``. This cannot be combined with
                                                                  ``ask_during_checkin``.
-dependency_value                      string                     The value ``dependency_question`` needs to be set to.
+dependency_values                     list of strings            If ``dependency_question`` is set to a boolean
-                                                                 If ``dependency_question`` is set to a boolean
+                                                                 question, this should be ``["True"]`` or ``["False"]``.
-                                                                 question, this should be ``"true"`` or ``"false"``.
+                                                                 Otherwise, it should be a list of ``identifier`` values
-                                                                 Otherwise, it should be the ``identifier`` of a
+                                                                 of question options.
-                                                                 question option.
+dependency_value                      string                     An old version of ``dependency_values`` that only allows
+                                                                 for one value. **Deprecated.**
 ===================================== ========================== =======================================================
 
 .. versionchanged:: 1.12
@@ -75,6 +78,14 @@ dependency_value                      string                     The value ``dep
 
   The attribute ``hidden`` and the question type ``CC`` have been added.
 
+.. versionchanged:: 3.0
+
+  The attribute ``dependency_values`` has been added.
+
+.. versionchanged:: 3.1
+
+  The attribute ``print_on_invoice`` has been added.
+
 Endpoints
 ---------
 
@@ -118,8 +129,10 @@ Endpoints
             "identifier": "WY3TP9SL",
             "ask_during_checkin": false,
             "hidden": false,
+            "print_on_invoice": false,
             "dependency_question": null,
             "dependency_value": null,
+            "dependency_values": [],
             "options": [
               {
                 "id": 1,
@@ -186,8 +199,10 @@ Endpoints
         "identifier": "WY3TP9SL",
         "ask_during_checkin": false,
         "hidden": false,
+        "print_on_invoice": false,
         "dependency_question": null,
         "dependency_value": null,
+        "dependency_values": [],
         "options": [
           {
             "id": 1,
@@ -228,7 +243,7 @@ Endpoints
       POST /api/v1/organizers/bigevents/events/sampleconf/questions/ HTTP/1.1
       Host: pretix.eu
       Accept: application/json, text/javascript
-      Content: application/json
+      Content-Type: application/json
 
       {
         "question": {"en": "T-Shirt size"},
@@ -238,8 +253,9 @@ Endpoints
         "position": 1,
         "ask_during_checkin": false,
         "hidden": false,
+        "print_on_invoice": false,
         "dependency_question": null,
-        "dependency_value": null,
+        "dependency_values": [],
         "options": [
           {
             "answer": {"en": "S"}
@@ -272,8 +288,10 @@ Endpoints
         "identifier": "WY3TP9SL",
         "ask_during_checkin": false,
         "hidden": false,
+        "print_on_invoice": false,
         "dependency_question": null,
         "dependency_value": null,
+        "dependency_values": [],
         "options": [
           {
             "id": 1,
@@ -344,8 +362,10 @@ Endpoints
         "identifier": "WY3TP9SL",
         "ask_during_checkin": false,
         "hidden": false,
+        "print_on_invoice": false,
         "dependency_question": null,
         "dependency_value": null,
+        "dependency_values": [],
         "options": [
           {
             "id": 1,

doc/api/resources/quotas.rst

@@ -20,12 +20,22 @@ size                                  integer                    The size of the
 items                                 list of integers           List of item IDs this quota acts on.
 variations                            list of integers           List of item variation IDs this quota acts on.
 subevent                              integer                    ID of the date inside an event series this quota belongs to (or ``null``).
+close_when_sold_out                   boolean                    If ``true``, the quota will "close" as soon as it is
+                                                                 sold out once. Even if tickets become available again,
+                                                                 they will not be sold unless the quota is set to open
+                                                                 again.
+closed                                boolean                    Whether the quota is currently closed (see above
+                                                                 field).
 ===================================== ========================== =======================================================
 
 .. versionchanged:: 1.10
 
    The write operations ``POST``, ``PATCH``, ``PUT``, and ``DELETE`` have been added.
 
+.. versionchanged:: 3.0
+
+   The attributes ``close_when_sold_out`` and ``closed`` have been added.
+
 
 Endpoints
 ---------
@@ -61,7 +71,9 @@ Endpoints
             "size": 200,
             "items": [1, 2],
             "variations": [1, 4, 5, 7],
-            "subevent": null
+            "subevent": null,
+            "close_when_sold_out": false,
+            "closed": false
           }
         ]
       }
@@ -102,7 +114,9 @@ Endpoints
         "size": 200,
         "items": [1, 2],
         "variations": [1, 4, 5, 7],
-        "subevent": null
+        "subevent": null,
+        "close_when_sold_out": false,
+        "closed": false
       }
 
    :param organizer: The ``slug`` field of the organizer to fetch
@@ -123,14 +137,16 @@ Endpoints
       POST /api/v1/organizers/bigevents/events/sampleconf/quotas/ HTTP/1.1
       Host: pretix.eu
       Accept: application/json, text/javascript
-      Content: application/json
+      Content-Type: application/json
 
       {
         "name": "Ticket Quota",
         "size": 200,
         "items": [1, 2],
         "variations": [1, 4, 5, 7],
-        "subevent": null
+        "subevent": null,
+        "close_when_sold_out": false,
+        "closed": false
       }
 
    **Example response**:
@@ -147,7 +163,9 @@ Endpoints
         "size": 200,
         "items": [1, 2],
         "variations": [1, 4, 5, 7],
-        "subevent": null
+        "subevent": null,
+        "close_when_sold_out": false,
+        "closed": false
       }
 
    :param organizer: The ``slug`` field of the organizer of the event/item to create a quota for
@@ -200,7 +218,9 @@ Endpoints
           1,
           2
         ],
-        "subevent": null
+        "subevent": null,
+        "close_when_sold_out": false,
+        "closed": false
       }
 
    :param organizer: The ``slug`` field of the organizer to modify

doc/api/resources/seatingplans.rst

@@ -0,0 +1,209 @@
+.. _`rest-seatingplans`:
+
+Seating plans
+=============
+
+Resource description
+--------------------
+
+The seating plan resource contains the following public fields:
+
+.. rst-class:: rest-resource-table
+
+===================================== ========================== =======================================================
+Field                                 Type                       Description
+===================================== ========================== =======================================================
+id                                    integer                    Internal ID of the plan
+name                                  string                     Human-readable name of the plan
+layout                                object                     JSON representation of the seating plan. These
+                                                                 representations follow a JSON schema that currently
+                                                                 still evolves. The version in use can be found `here`_.
+===================================== ========================== =======================================================
+
+.. versionchanged:: 3.0
+
+   This endpoint has been added.
+
+Endpoints
+---------
+
+.. http:get:: /api/v1/organizers/(organizer)/seatingplans/
+
+   Returns a list of all seating plans within a given organizer.
+
+   **Example request**:
+
+   .. sourcecode:: http
+
+      GET /api/v1/organizers/bigevents/seatingplans/ HTTP/1.1
+      Host: pretix.eu
+      Accept: application/json, text/javascript
+
+   **Example response**:
+
+   .. sourcecode:: http
+
+      HTTP/1.1 200 OK
+      Vary: Accept
+      Content-Type: application/json
+
+      {
+        "count": 1,
+        "next": null,
+        "previous": null,
+        "results": [
+          {
+            "id": 2,
+            "name": "Main plan",
+            "layout": { … }
+          }
+        ]
+      }
+
+   :query integer page: The page number in case of a multi-page result set, default is 1
+   :param organizer: The ``slug`` field of the organizer to fetch
+   :statuscode 200: no error
+   :statuscode 401: Authentication failure
+   :statuscode 403: The requested organizer does not exist **or** you have no permission to view this resource.
+
+.. http:get:: /api/v1/organizers/(organizer)/seatingplans/(id)/
+
+   Returns information on one plan, identified by its ID.
+
+   **Example request**:
+
+   .. sourcecode:: http
+
+      GET /api/v1/organizers/bigevents/seatingplans/1/ HTTP/1.1
+      Host: pretix.eu
+      Accept: application/json, text/javascript
+
+   **Example response**:
+
+   .. sourcecode:: http
+
+      HTTP/1.1 200 OK
+      Vary: Accept
+      Content-Type: application/json
+
+      {
+        "id": 2,
+        "name": "Main plan",
+        "layout": { … }
+      }
+
+   :param organizer: The ``slug`` field of the organizer to fetch
+   :param id: The ``id`` field of the seating plan to fetch
+   :statuscode 200: no error
+   :statuscode 401: Authentication failure
+   :statuscode 403: The requested organizer does not exist **or** you have no permission to view this resource.
+
+.. http:post:: /api/v1/organizers/(organizer)/seatingplans/
+
+   Creates a new seating plan
+
+   **Example request**:
+
+   .. sourcecode:: http
+
+      POST /api/v1/organizers/bigevents/seatingplans/ HTTP/1.1
+      Host: pretix.eu
+      Accept: application/json, text/javascript
+      Content-Type: application/json
+
+      {
+        "name": "Main plan",
+        "layout": { … }
+      }
+
+   **Example response**:
+
+   .. sourcecode:: http
+
+      HTTP/1.1 201 Created
+      Vary: Accept
+      Content-Type: application/json
+
+      {
+        "id": 3,
+        "name": "Main plan",
+        "layout": { … }
+      }
+
+   :param organizer: The ``slug`` field of the organizer to create a seating plan for
+   :statuscode 201: no error
+   :statuscode 400: The seating plan could not be created due to invalid submitted data.
+   :statuscode 401: Authentication failure
+   :statuscode 403: The requested organizer does not exist **or** you have no permission to create this resource.
+
+.. http:patch:: /api/v1/organizers/(organizer)/seatingplans/(id)/
+
+   Update a plan. You can also use ``PUT`` instead of ``PATCH``. With ``PUT``, you have to provide all fields of
+   the resource, other fields will be reset to default. With ``PATCH``, you only need to provide the fields that you
+   want to change.
+
+   You can change all fields of the resource except the ``id`` field. **You can not change a plan while it is in use for
+   any events.**
+
+   **Example request**:
+
+   .. sourcecode:: http
+
+      PATCH /api/v1/organizers/bigevents/seatingplans/1/ HTTP/1.1
+      Host: pretix.eu
+      Accept: application/json, text/javascript
+      Content-Type: application/json
+      Content-Length: 94
+
+      {
+        "name": "Old plan"
+      }
+
+   **Example response**:
+
+   .. sourcecode:: http
+
+      HTTP/1.1 200 OK
+      Vary: Accept
+      Content-Type: application/json
+
+      {
+        "id": 1,
+        "name": "Old plan",
+        "layout": { … }
+      }
+
+   :param organizer: The ``slug`` field of the organizer to modify
+   :param id: The ``id`` field of the plan to modify
+   :statuscode 200: no error
+   :statuscode 400: The plan could not be modified due to invalid submitted data
+   :statuscode 401: Authentication failure
+   :statuscode 403: The requested organizer does not exist **or** you have no permission to change this resource **or** the plan is currently in use.
+
+.. http:delete:: /api/v1/organizers/(organizer)/seatingplans/(id)/
+
+   Delete a plan. You can not delete plans which are currently in use by any events.
+
+   **Example request**:
+
+   .. sourcecode:: http
+
+      DELETE /api/v1/organizers/bigevents/seatingplans/1/ HTTP/1.1
+      Host: pretix.eu
+      Accept: application/json, text/javascript
+
+   **Example response**:
+
+   .. sourcecode:: http
+
+      HTTP/1.1 204 No Content
+      Vary: Accept
+
+   :param organizer: The ``slug`` field of the organizer to modify
+   :param id: The ``id`` field of the plan to delete
+   :statuscode 204: no error
+   :statuscode 401: Authentication failure
+   :statuscode 403: The requested organizer does not exist **or** you have no permission to delete this resource **or** the plan is currently in use.
+
+
+.. _here: https://github.com/pretix/pretix/blob/master/src/pretix/static/seating/seating-plan.schema.json

doc/api/resources/subevents.rst

@@ -36,7 +36,11 @@ variation_price_overrides             list of objects            List of variati
                                                                  the default price
 ├ variation                           integer                    The internal variation ID
 └ price                               money (string)             The price or ``null`` for the default price
-meta_data                             dict                       Values set for organizer-specific meta data parameters.
+meta_data                             object                     Values set for organizer-specific meta data parameters.
+seating_plan                          integer                    If reserved seating is in use, the ID of a seating
+                                                                 plan. Otherwise ``null``.
+seat_category_mapping                 object                     An object mapping categories of the seating plan
+                                                                 (strings) to items in the event (integers or ``null``).
 ===================================== ========================== =======================================================
 
 .. versionchanged:: 1.7
@@ -54,6 +58,10 @@ meta_data                             dict                       Values set for
 
    The attribute ``is_public`` has been added.
 
+.. versionchanged:: 3.0
+
+   The attributes ``seating_plan`` and ``seat_category_mapping`` have been added.
+
 Endpoints
 ---------
 
@@ -93,6 +101,8 @@ Endpoints
             "date_admission": null,
             "presale_start": null,
             "presale_end": null,
+            "seating_plan": null,
+            "seat_category_mapping": {},
             "location": null,
             "item_price_overrides": [
               {
@@ -130,7 +140,7 @@ Endpoints
       POST /api/v1/organizers/bigevents/events/sampleconf/subevents/ HTTP/1.1
       Host: pretix.eu
       Accept: application/json, text/javascript
-      Content: application/json
+      Content-Type: application/json
 
       {
         "name": {"en": "First Sample Conference"},
@@ -142,6 +152,8 @@ Endpoints
         "presale_start": null,
         "presale_end": null,
         "location": null,
+        "seating_plan": null,
+        "seat_category_mapping": {},
         "item_price_overrides": [
           {
             "item": 2,
@@ -172,6 +184,8 @@ Endpoints
         "presale_start": null,
         "presale_end": null,
         "location": null,
+        "seating_plan": null,
+        "seat_category_mapping": {},
         "item_price_overrides": [
           {
             "item": 2,
@@ -223,6 +237,8 @@ Endpoints
         "presale_start": null,
         "presale_end": null,
         "location": null,
+        "seating_plan": null,
+        "seat_category_mapping": {},
         "item_price_overrides": [
           {
             "item": 2,
@@ -255,7 +271,7 @@ Endpoints
       PATCH /api/v1/organizers/bigevents/events/sampleconf/subevents/1/ HTTP/1.1
       Host: pretix.eu
       Accept: application/json, text/javascript
-      Content: application/json
+      Content-Type: application/json
 
       {
         "name": {"en": "New Subevent Name"},
@@ -287,6 +303,8 @@ Endpoints
         "presale_start": null,
         "presale_end": null,
         "location": null,
+        "seating_plan": null,
+        "seat_category_mapping": {},
         "item_price_overrides": [
           {
             "item": 2,
@@ -371,6 +389,8 @@ Endpoints
             "presale_start": null,
             "presale_end": null,
             "location": null,
+            "seating_plan": null,
+            "seat_category_mapping": {},
             "item_price_overrides": [
               {
                 "item": 2,

doc/api/resources/vouchers.rst

@@ -41,6 +41,7 @@ quota                                 integer                    An ID of a quot
 tag                                   string                     A string that is used for grouping vouchers
 comment                               string                     An internal comment on the voucher
 subevent                              integer                    ID of the date inside an event series this voucher belongs to (or ``null``).
+show_hidden_items                     boolean                    Only if set to ``true``, this voucher allows to buy products with the property ``hide_without_voucher``. Defaults to ``true``.
 ===================================== ========================== =======================================================
 
 
@@ -48,6 +49,10 @@ subevent                              integer                    ID of the date
 
    The write operations ``POST``, ``PATCH``, ``PUT``, and ``DELETE`` have been added.
 
+.. versionchanged:: 3.0
+
+   The attribute ``show_hidden_items`` has been added.
+
 Endpoints
 ---------
 

doc/api/resources/webhooks.rst

@@ -137,7 +137,7 @@ Endpoints
       POST /api/v1/organizers/bigevents/webhooks/ HTTP/1.1
       Host: pretix.eu
       Accept: application/json, text/javascript
-      Content: application/json
+      Content-Type: application/json
 
       {
         "enabled": true,

doc/development/api/email.rst

@@ -101,9 +101,12 @@ The template is passed the following context variables:
    The ``Event`` object
 
 ``signature`` (optional, only if configured)
-   The body as markdown (render with ``{{ signature|safe }}``)
+   The signature with event organizer contact details as markdown (render with ``{{ signature|safe }}``)
 
 ``order`` (optional, only if applicable)
    The ``Order`` object
 
+``position`` (optional, only if applicable)
+   The ``OrderPosition`` object
+
 .. _inlinestyler: https://pypi.org/project/inlinestyler/

doc/development/api/general.rst

@@ -12,7 +12,7 @@ Core
 
 .. automodule:: pretix.base.signals
    :members: periodic_task, event_live_issues, event_copy_data, email_filter, register_notification_types,
-      item_copy_data, register_sales_channels, register_global_settings
+      item_copy_data, register_sales_channels, register_global_settings, quota_availability, global_email_filter
 
 Order events
 """"""""""""
@@ -20,13 +20,17 @@ Order events
 There are multiple signals that will be sent out in the ordering cycle:
 
 .. automodule:: pretix.base.signals
-   :members: validate_cart, validate_order, order_fee_calculation, order_paid, order_placed, order_canceled, order_expired, order_modified, order_changed, order_approved, order_denied, order_fee_type_name, allow_ticket_download
+   :members: validate_cart, validate_cart_addons, validate_order, order_fee_calculation, order_paid, order_placed, order_canceled, order_expired, order_modified, order_changed, order_approved, order_denied, order_fee_type_name, allow_ticket_download, order_split
 
 Frontend
 --------
 
 .. automodule:: pretix.presale.signals
-   :members: html_head, html_footer, footer_link, front_page_top, front_page_bottom, fee_calculation_for_cart, contact_form_fields, question_form_fields, checkout_confirm_messages, checkout_confirm_page_content, checkout_all_optional, html_page_header, sass_preamble, sass_postamble, checkout_flow_steps, order_info, order_meta_from_request, position_info
+   :members: html_head, html_footer, footer_link, front_page_top, front_page_bottom, fee_calculation_for_cart, contact_form_fields, question_form_fields, checkout_confirm_messages, checkout_confirm_page_content, checkout_all_optional, html_page_header, sass_preamble, sass_postamble, render_seating_plan, checkout_flow_steps, position_info
+
+
+.. automodule:: pretix.presale.signals
+   :members: order_info, order_meta_from_request
 
 Request flow
 """"""""""""
@@ -45,7 +49,7 @@ Backend
 
 .. automodule:: pretix.control.signals
    :members: nav_event, html_head, html_page_start, quota_detail_html, nav_topbar, nav_global, nav_organizer, nav_event_settings,
-             order_info, event_settings_widget, oauth_application_registered, order_position_buttons
+             order_info, event_settings_widget, oauth_application_registered, order_position_buttons, subevent_forms, item_formsets
 
 
 .. automodule:: pretix.base.signals

doc/development/api/index.rst

@@ -12,6 +12,7 @@ Contents:
    payment
    payment_2.0
    email
+   placeholder
    invoice
    shredder
    customview

doc/development/api/payment.rst

@@ -108,6 +108,8 @@ The provider class
 
    .. automethod:: execute_refund
 
+   .. automethod:: api_payment_details
+
    .. automethod:: shred_payment_info
 
    .. autoattribute:: is_implicit

doc/development/api/placeholder.rst

@@ -0,0 +1,79 @@
+.. highlight:: python
+   :linenothreshold: 5
+
+Writing an HTML e-mail placeholder plugin
+=========================================
+
+An email placeholder is a dynamic value that pretix users can use in their email templates.
+
+Please read :ref:`Creating a plugin <pluginsetup>` first, if you haven't already.
+
+Placeholder registration
+------------------------
+
+The placeholder API does not make a lot of usage from signals, however, it
+does use a signal to get a list of all available email placeholders. Your plugin
+should listen for this signal and return an instance of a subclass of ``pretix.base.email.BaseMailTextPlaceholder``::
+
+    from django.dispatch import receiver
+
+    from pretix.base.signals import register_mail_placeholders
+
+
+    @receiver(register_mail_placeholders, dispatch_uid="placeholder_custom")
+    def register_mail_renderers(sender, **kwargs):
+        from .email import MyPlaceholderClass
+        return MyPlaceholder()
+
+
+Context mechanism
+-----------------
+
+Emails are sent in different "contexts" within pretix. For example, many emails are sent in the
+the context of an order, but some are not, such as the notification of a waiting list voucher.
+
+Not all placeholders make sense in every email, and placeholders usually depend some parameters
+themselves, such as the ``Order`` object. Therefore, placeholders are expected to explicitly declare
+what values they depend on and they will only be available in an email if all those dependencies are
+met. Currently, placeholders can depend on the following context parameters:
+
+* ``event``
+* ``order``
+* ``position``
+* ``waiting_list_entry``
+* ``invoice_address``
+* ``payment``
+
+There are a few more that are only to be used internally but not by plugins.
+
+The placeholder class
+---------------------
+
+.. class:: pretix.base.email.BaseMailTextPlaceholder
+
+   .. autoattribute:: identifier
+
+      This is an abstract attribute, you **must** override this!
+
+   .. autoattribute:: required_context
+
+      This is an abstract attribute, you **must** override this!
+
+   .. automethod:: render
+
+      This is an abstract method, you **must** implement this!
+
+   .. automethod:: render_sample
+
+      This is an abstract method, you **must** implement this!
+
+Helper class for simple placeholders
+------------------------------------
+
+pretix ships with a helper class that makes it easy to provide placeholders based on simple
+functions::
+
+     placeholder = SimpleFunctionalMailTextPlaceholder(
+         'code', ['order'], lambda order: order.code, sample='F8VVL'
+     )
+

doc/development/api/shredder.rst

@@ -35,9 +35,9 @@ The shredder class
 
 .. class:: pretix.base.shredder.BaseDataShredder
 
-   The central object of each invoice renderer is the subclass of ``BaseInvoiceRenderer``.
+   The central object of each data shredder is the subclass of ``BaseDataShredder``.
 
-   .. py:attribute:: BaseInvoiceRenderer.event
+   .. py:attribute:: BaseDataShredder.event
 
       The default constructor sets this property to the event we are currently
       working for.

doc/development/setup.rst

@@ -65,9 +65,7 @@ Then, create the local database::
     python manage.py migrate
 
 A first user with username ``admin@localhost`` and password ``admin`` will be automatically
-created. If you want to generate more test data, run::
+created.
-
-    python make_testdata.py
 
 If you want to see pretix in a different language than English, you have to compile our language
 files::
@@ -83,8 +81,7 @@ To run the local development webserver, execute::
 and head to http://localhost:8000/
 
 As we did not implement an overall front page yet, you need to go directly to
-http://localhost:8000/control/ for the admin view or, if you imported the test
+http://localhost:8000/control/ for the admin view.
-data as suggested above, to the event page at http://localhost:8000/bigevents/2019/
 
 .. note:: If you want the development server to listen on a different interface or
           port (for example because you develop on `pretixdroid`_), you can check

doc/spelling_wordlist.txt

@@ -36,13 +36,17 @@ eu
 filename
 filesystem
 fontawesome
+formset
+formsets
 frontend
 frontpage
 gettext
 gunicorn
+guid
 hardcoded
 hostname
 idempotency
+iframe
 incrementing
 inofficial
 invalidations
@@ -101,6 +105,7 @@ screenshot
 scss
 searchable
 selectable
+serializable
 serializers
 serializers
 sexualized
@@ -134,6 +139,7 @@ versa
 versioning
 viewset
 viewsets
+waitinglist
 webhook
 webhooks
 webserver

doc/user/events/structureguide.rst

@@ -45,8 +45,8 @@ In addition, you will need quotas. If you do not care how many of your tickets a
 
 If you want to limit the number of student tickets to 50 to ensure a certain minimum revenue, but do not want to limit the number of regular tickets artificially, we suggest you to create the same quota of 200 that is linked to both products, and then create a **second quota** of 50 that is only linked to the student ticket. This way, the system will reduce both quotas whenever a student ticket is sold and only the larger quota when a regular ticket is sold.
 
-Use case: Early-bird tiers
+Use case: Early-bird tiers based on dates
---------------------------
+-----------------------------------------
 
 Let's say you run a conference that has the following pricing scheme:
 
@@ -58,9 +58,53 @@ Of course, you could just set up one product and change its price at the given d
 
 Create three products (e.g. "super early bird", "early bird", "regular ticket") with the respective prices and one shared quota of your total event capacity. Then, set the **available from** and **available until** configuration fields of the products to automatically turn them on and off based on the current date.
 
-.. note::
+Use case: Early-bird tiers based on ticket numbers
+--------------------------------------------------
 
-   pretix currently can't do early-bird tiers based on **ticket number** instead of time. We're planning this feature for later in 2019. For now, you'll need to monitor that manually.
+Let's say you run a conference with 400 tickets that has the following pricing scheme:
+
+* First 100 tickets ("super early bird"): € 450
+* Next 100 tickets ("early bird"): € 550
+* Remaining tickets ("regular"): € 650
+
+First of all, create three products:
+
+* "Super early bird ticket"
+* "Early bird ticket"
+* "Regular ticket"
+
+Then, create three quotas:
+
+* "Super early bird" with a **size of 100** and the "Super early bird ticket" product selected. At "Advanced options",
+  select the box "Close this quota permanently once it is sold out".
+
+* "Early bird and lower" with a **size of 200** and both of the "Super early bird ticket" and "Early bird ticket"
+  products selected. At "Advanced options", select the box "Close this quota permanently once it is sold out".
+
+* "All participants" with a **size of 400**, all three products selected and **no additional options**.
+
+Next, modify the product "Regular ticket". In the section "Availability", you should look for the option "Only show
+after sellout of" and select your quota "Early bird and lower". Do the same for the "Early bird ticket" with the quota
+"Super early bird ticket".
+
+This will ensure the following things:
+
+* Each ticket level is only visible after the previous level is sold out.
+
+* As soon as one level is really sold out, it's not coming back, because the quota "closes", i.e. locks in place.
+
+* By creating a total quota of 400 with all tickets included, you can still make sure to sell the maximum number of
+  tickets, even if e.g. early-bird tickets are canceled.
+
+Optionally, if you want to hide the early bird prices once they are sold out, go to "Settings", then "Display" and
+select "Hide all products that are sold out". Of course, it might be a nice idea to keep showing the prices to remind
+people to buy earlier next time ;)
+
+Please note that there might be short time intervals where the prices switch back and forth: When the last early bird
+tickets are in someone's cart (but not yet sold!), the early bird tickets will show as "Reserved" and the regular
+tickets start showing up. However, if the customers holding the reservations do not complete their order,
+the early bird tickets will become available again. This is not avoidable if we want to prevent malicious users
+from blocking all the cheap tickets without an actual sale happening.
 
 Use case: Up-selling of ticket extras
 -------------------------------------
@@ -85,8 +129,14 @@ Use case: Conference with workshops
 
 When running a conference, you might also organize a number of workshops with smaller capacity. To be able to plan, it would be great to know which workshops an attendee plans to attend.
 
+Option A: Questions
+"""""""""""""""""""
+
 Your first and simplest option is to just create a multiple-choice question. This has the upside of making it easy for users to change their mind later on, but will not allow you to restrict the number of attendees signing up for a given workshop – or even charge extra for a given workshop.
 
+Option B: Add-on products with fixed time slots
+"""""""""""""""""""""""""""""""""""""""""""""""
+
 The usually better option is to go with add-on products. Let's take for example the following conference schedule, in which the lecture can be attended by anyone, but the workshops only have space for 20 persons each:
 
 ==================== =================================== ===================================
@@ -117,6 +167,42 @@ Assuming you already created one or more products for your general conference ad
 
 * One add-on configuration on your base product that allows users to choose between 0 and 2 products from the category "Workshops"
 
+Option C: Add-on products with variable time slots
+""""""""""""""""""""""""""""""""""""""""""""""""""
+
+The above option only works if your conference uses fixed time slots and every workshop uses exactly one time slot. If
+your schedule looks like this, it's not going to work great:
+
++-------------+------------+-----------+
+| Time        | Room A     | Room B    |
++=============+============+===========+
+| 09:00-11:00 | Talk 1     | Long      |
++-------------+------------+ Workshop 1|
+| 11:00-13:00 | Talk 2     |           |
++-------------+------------+-----------+
+| 14:00-16:00 | Long       | Talk 3    |
++-------------+ workshop 2 +-----------+
+| 16:00-18:00 |            | Talk 4    |
++-------------+------------+-----------+
+
+In this case, we recommend that you go to *Settings*, then *Plugins* and activate the plugin **Agenda constraints**.
+
+Then, create a product (without variations) for every single part that should be bookable (talks 1-4 and long workshops
+1 and 2) as well as appropriate quotas for each of them.
+
+All of these products should be part of the same category. In your base product (e.g. your conference ticket), you
+can then create an add-on product configuration allowing users to add products from this category.
+
+If you edit these products, you will be able to enter the "Start date" and "End date" of the talk or workshop close
+to the bottom of the page. If you fill in these values, pretix will automatically ensure no overlapping talks are
+booked.
+
+.. note::
+
+    This option is currently only available on pretix Hosted. If you are interested in using it with pretix Enterprise,
+    please contact sales@pretix.eu.
+
+
 Use case: Discounted packages
 -----------------------------
 

doc/user/events/widget.rst

@@ -143,6 +143,11 @@ You can see an example here:
         </div>
     </noscript>
 
+You can filter events by meta data attributes. You can create those attributes in your order profile and set their values in both event and series date
+settings. For example, if you set up a meta data property called "Promoted" that you set to "Yes" on some events, you can pass a filter like this::
+
+   <pretix-widget event="https://pretix.eu/demo/series/" style="list" filter="attr[Promoted]=Yes"></pretix-widget>
+
 pretix Button
 -------------
 
@@ -269,6 +274,9 @@ Hosted or pretix Enterprise are active, you can pass the following fields:
         };
     </script>
 
+  In some combinations with Google Tag Manager, the widget does not load this way. In this case, try replacing
+  ``tracker.get('clientId')`` with ``ga.getAll()[0].get('clientId')``.
+
 
 .. versionchanged:: 2.3
 

src/MANIFEST.in

@@ -22,3 +22,5 @@ recursive-include pretix/plugins/ticketoutputpdf/templates *
 recursive-include pretix/plugins/ticketoutputpdf/static *
 recursive-include pretix/plugins/badges/templates *
 recursive-include pretix/plugins/badges/static *
+recursive-include pretix/plugins/returnurl/templates *
+recursive-include pretix/plugins/returnurl/static *

src/make_testdata.py

@@ -1,71 +0,0 @@
-#!/usr/bin/env python
-import os
-import sys
-from datetime import datetime
-
-os.environ.setdefault("DJANGO_SETTINGS_MODULE", "pretix.settings")
-
-import django
-
-django.setup()
-
-from pretix.base.models import *  # NOQA
-from django.utils.timezone import now
-
-if Organizer.objects.exists():
-    print("There already is data in your DB!")
-    sys.exit(0)
-user = User.objects.get_or_create(
-    email='admin@localhost',
-)[0]
-user.set_password('admin')
-user.save()
-organizer = Organizer.objects.create(
-    name='BigEvents LLC', slug='bigevents'
-)
-year = now().year + 1
-event = Event.objects.create(
-    organizer=organizer, name='Demo Conference {}'.format(year),
-    slug=year, currency='EUR', live=True,
-    date_from=datetime(year, 9, 4, 17, 0, 0),
-    date_to=datetime(year, 9, 6, 17, 0, 0),
-)
-t = Team.objects.get_or_create(
-    organizer=organizer, name='Admin Team',
-    all_events=True, can_create_events=True, can_change_teams=True,
-    can_change_organizer_settings=True, can_change_event_settings=True, can_change_items=True,
-    can_view_orders=True, can_change_orders=True, can_view_vouchers=True, can_change_vouchers=True
-)
-t[0].members.add(user)
-cat_tickets = ItemCategory.objects.create(
-    event=event, name='Tickets'
-)
-cat_merch = ItemCategory.objects.create(
-    event=event, name='Merchandise'
-)
-question = Question.objects.create(
-    event=event, question='Age',
-    type=Question.TYPE_NUMBER, required=False
-)
-tr19 = event.tax_rules.create(rate=19)
-item_ticket = Item.objects.create(
-    event=event, category=cat_tickets, name='Ticket',
-    default_price=23, tax_rule=tr19, admission=True
-)
-item_ticket.questions.add(question)
-item_shirt = Item.objects.create(
-    event=event, category=cat_merch, name='T-Shirt',
-    default_price=15, tax_rule=tr19
-)
-var_s = ItemVariation.objects.create(item=item_shirt, value='S')
-var_m = ItemVariation.objects.create(item=item_shirt, value='M')
-var_l = ItemVariation.objects.create(item=item_shirt, value='L')
-ticket_quota = Quota.objects.create(
-    event=event, name='Ticket quota', size=400,
-)
-ticket_quota.items.add(item_ticket)
-ticket_shirts = Quota.objects.create(
-    event=event, name='Shirt quota', size=200,
-)
-ticket_quota.items.add(item_shirt)
-ticket_quota.variations.add(var_s, var_m, var_l)

src/pretix/__init__.py

@@ -1 +1 @@
-__version__ = "2.8.0"
+__version__ = "3.2.0"

src/pretix/api/auth/device.py

@@ -1,4 +1,5 @@
 from django.contrib.auth.models import AnonymousUser
+from django_scopes import scopes_disabled
 from rest_framework import exceptions
 from rest_framework.authentication import TokenAuthentication
 
@@ -12,7 +13,8 @@ class DeviceTokenAuthentication(TokenAuthentication):
     def authenticate_credentials(self, key):
         model = self.get_model()
         try:
-            device = model.objects.select_related('organizer').get(api_token=key)
+            with scopes_disabled():
+                device = model.objects.select_related('organizer').get(api_token=key)
         except model.DoesNotExist:
             raise exceptions.AuthenticationFailed('Invalid token.')
 

src/pretix/api/auth/permission.py

@@ -3,7 +3,7 @@ from rest_framework.permissions import SAFE_METHODS, BasePermission
 from pretix.api.models import OAuthAccessToken
 from pretix.base.models import Device, Event, User
 from pretix.base.models.auth import SuperuserPermissionSet
-from pretix.base.models.organizer import Organizer, TeamAPIToken
+from pretix.base.models.organizer import TeamAPIToken
 from pretix.helpers.security import (
     SessionInvalid, SessionReauthRequired, assert_session_valid,
 )
@@ -50,9 +50,6 @@ class EventPermission(BasePermission):
                 return False
 
         elif 'organizer' in request.resolver_match.kwargs:
-            request.organizer = Organizer.objects.filter(
-                slug=request.resolver_match.kwargs['organizer'],
-            ).first()
             if not request.organizer or not perm_holder.has_organizer_permission(request.organizer, request=request):
                 return False
             if isinstance(perm_holder, User) and perm_holder.has_active_staff_session(request.session.session_key):

src/pretix/api/middleware.py

@@ -4,10 +4,13 @@ from hashlib import sha1
 from django.conf import settings
 from django.db import transaction
 from django.http import HttpRequest, HttpResponse, JsonResponse
+from django.urls import resolve
 from django.utils.timezone import now
+from django_scopes import scope
 from rest_framework import status
 
 from pretix.api.models import ApiCall
+from pretix.base.models import Organizer
 
 
 class IdempotencyMiddleware:
@@ -89,3 +92,21 @@ class IdempotencyMiddleware:
             for k, v in json.loads(call.response_headers).values():
                 r[k] = v
             return r
+
+
+class ApiScopeMiddleware:
+    def __init__(self, get_response):
+        self.get_response = get_response
+
+    def __call__(self, request: HttpRequest):
+        if not request.path.startswith('/api/'):
+            return self.get_response(request)
+
+        url = resolve(request.path_info)
+        if 'organizer' in url.kwargs:
+            request.organizer = Organizer.objects.filter(
+                slug=url.kwargs['organizer'],
+            ).first()
+
+        with scope(organizer=getattr(request, 'organizer', None)):
+            return self.get_response(request)

src/pretix/api/serializers/cart.py

@@ -8,31 +8,33 @@ from rest_framework.exceptions import ValidationError
 
 from pretix.api.serializers.i18n import I18nAwareModelSerializer
 from pretix.api.serializers.order import (
-    AnswerCreateSerializer, AnswerSerializer,
+    AnswerCreateSerializer, AnswerSerializer, InlineSeatSerializer,
 )
-from pretix.base.models import Quota
+from pretix.base.models import Quota, Seat
 from pretix.base.models.orders import CartPosition
 
 
 class CartPositionSerializer(I18nAwareModelSerializer):
     answers = AnswerSerializer(many=True)
+    seat = InlineSeatSerializer()
 
     class Meta:
         model = CartPosition
         fields = ('id', 'cart_id', 'item', 'variation', 'price', 'attendee_name', 'attendee_name_parts',
                   'attendee_email', 'voucher', 'addon_to', 'subevent', 'datetime', 'expires', 'includes_tax',
-                  'answers',)
+                  'answers', 'seat')
 
 
 class CartPositionCreateSerializer(I18nAwareModelSerializer):
     answers = AnswerCreateSerializer(many=True, required=False)
     expires = serializers.DateTimeField(required=False)
     attendee_name = serializers.CharField(required=False, allow_null=True)
+    seat = serializers.CharField(required=False, allow_null=True)
 
     class Meta:
         model = CartPosition
         fields = ('cart_id', 'item', 'variation', 'price', 'attendee_name', 'attendee_name_parts', 'attendee_email',
-                  'subevent', 'expires', 'includes_tax', 'answers',)
+                  'subevent', 'expires', 'includes_tax', 'answers', 'seat')
 
     def create(self, validated_data):
         answers_data = validated_data.pop('answers')
@@ -71,6 +73,24 @@ class CartPositionCreateSerializer(I18nAwareModelSerializer):
                 validated_data['attendee_name_parts'] = {
                     '_legacy': attendee_name
                 }
+
+            seated = validated_data.get('item').seat_category_mappings.filter(subevent=validated_data.get('subevent')).exists()
+            if validated_data.get('seat'):
+                if not seated:
+                    raise ValidationError('The specified product does not allow to choose a seat.')
+                try:
+                    seat = self.context['event'].seats.get(seat_guid=validated_data['seat'], subevent=validated_data.get('subevent'))
+                except Seat.DoesNotExist:
+                    raise ValidationError('The specified seat does not exist.')
+                except Seat.MultipleObjectsReturned:
+                    raise ValidationError('The specified seat ID is not unique.')
+                else:
+                    validated_data['seat'] = seat
+                    if not seat.is_available():
+                        raise ValidationError(ugettext_lazy('The selected seat "{seat}" is not available.').format(seat=seat.name))
+            elif seated:
+                raise ValidationError('The specified product requires to choose a seat.')
+
             cp = CartPosition.objects.create(event=self.context['event'], **validated_data)
 
         for answ_data in answers_data:

src/pretix/api/serializers/checkin.py

@@ -3,6 +3,7 @@ from rest_framework import serializers
 from rest_framework.exceptions import ValidationError
 
 from pretix.api.serializers.i18n import I18nAwareModelSerializer
+from pretix.base.channels import get_all_sales_channels
 from pretix.base.models import CheckinList
 
 
@@ -13,7 +14,7 @@ class CheckinListSerializer(I18nAwareModelSerializer):
     class Meta:
         model = CheckinList
         fields = ('id', 'name', 'all_products', 'limit_products', 'subevent', 'checkin_count', 'position_count',
-                  'include_pending')
+                  'include_pending', 'auto_checkin_sales_channels')
 
     def validate(self, data):
         data = super().validate(data)
@@ -35,4 +36,8 @@ class CheckinListSerializer(I18nAwareModelSerializer):
             if full_data.get('subevent'):
                 raise ValidationError(_('The subevent does not belong to this event.'))
 
+        for channel in full_data.get('auto_checkin_sales_channels') or []:
+            if channel not in get_all_sales_channels():
+                raise ValidationError(_('Unknown sales channel.'))
+
         return data

src/pretix/api/serializers/event.py

@@ -11,6 +11,9 @@ from pretix.api.serializers.i18n import I18nAwareModelSerializer
 from pretix.base.models import Event, TaxRule
 from pretix.base.models.event import SubEvent
 from pretix.base.models.items import SubEventItem, SubEventItemVariation
+from pretix.base.services.seating import (
+    SeatProtected, generate_seats, validate_plan_change,
+)
 
 
 class MetaDataField(Field):
@@ -26,6 +29,22 @@ class MetaDataField(Field):
         }
 
 
+class SeatCategoryMappingField(Field):
+
+    def to_representation(self, value):
+        qs = value.seat_category_mappings.all()
+        if isinstance(value, Event):
+            qs = qs.filter(subevent=None)
+        return {
+            v.layout_category: v.product_id for v in qs
+        }
+
+    def to_internal_value(self, data):
+        return {
+            'seat_category_mapping': data or {}
+        }
+
+
 class PluginsField(Field):
 
     def to_representation(self, obj):
@@ -45,12 +64,14 @@ class PluginsField(Field):
 class EventSerializer(I18nAwareModelSerializer):
     meta_data = MetaDataField(required=False, source='*')
     plugins = PluginsField(required=False, source='*')
+    seat_category_mapping = SeatCategoryMappingField(source='*', required=False)
 
     class Meta:
         model = Event
         fields = ('name', 'slug', 'live', 'testmode', 'currency', 'date_from',
                   'date_to', 'date_admission', 'is_public', 'presale_start',
-                  'presale_end', 'location', 'has_subevents', 'meta_data', 'plugins')
+                  'presale_end', 'location', 'has_subevents', 'meta_data', 'seating_plan',
+                  'plugins', 'seat_category_mapping')
 
     def validate(self, data):
         data = super().validate(data)
@@ -61,6 +82,9 @@ class EventSerializer(I18nAwareModelSerializer):
         Event.clean_dates(data.get('date_from'), data.get('date_to'))
         Event.clean_presale(data.get('presale_start'), data.get('presale_end'))
 
+        if full_data.get('has_subevents') and full_data.get('seating_plan'):
+            raise ValidationError('Event series should not directly be assigned a seating plan.')
+
         return data
 
     def validate_has_subevents(self, value):
@@ -92,6 +116,27 @@ class EventSerializer(I18nAwareModelSerializer):
                 raise ValidationError(_('Meta data property \'{name}\' does not exist.').format(name=key))
         return value
 
+    def validate_seating_plan(self, value):
+        if value and value.organizer != self.context['request'].organizer:
+            raise ValidationError('Invalid seating plan.')
+        if self.instance and self.instance.pk:
+            try:
+                validate_plan_change(self.instance, None, value)
+            except SeatProtected as e:
+                raise ValidationError(str(e))
+        return value
+
+    def validate_seat_category_mapping(self, value):
+        if value and value['seat_category_mapping'] and (not self.instance or not self.instance.pk):
+            raise ValidationError('You cannot specify seat category mappings on event creation.')
+        item_cache = {i.pk: i for i in self.instance.items.all()}
+        result = {}
+        for k, item in value['seat_category_mapping'].items():
+            if item not in item_cache:
+                raise ValidationError('Item \'{id}\' does not exist.'.format(id=item))
+            result[k] = item_cache[item]
+        return {'seat_category_mapping': result}
+
     def validate_plugins(self, value):
         from pretix.base.plugins import get_all_plugins
 
@@ -109,6 +154,7 @@ class EventSerializer(I18nAwareModelSerializer):
     @transaction.atomic
     def create(self, validated_data):
         meta_data = validated_data.pop('meta_data', None)
+        validated_data.pop('seat_category_mapping', None)
         plugins = validated_data.pop('plugins', settings.PRETIX_PLUGINS_DEFAULT.split(','))
         event = super().create(validated_data)
 
@@ -120,6 +166,10 @@ class EventSerializer(I18nAwareModelSerializer):
                     value=value
                 )
 
+        # Seats
+        if event.seating_plan:
+            generate_seats(event, None, event.seating_plan, {})
+
         # Plugins
         if plugins is not None:
             event.set_active_plugins(plugins)
@@ -131,6 +181,7 @@ class EventSerializer(I18nAwareModelSerializer):
     def update(self, instance, validated_data):
         meta_data = validated_data.pop('meta_data', None)
         plugins = validated_data.pop('plugins', None)
+        seat_category_mapping = validated_data.pop('seat_category_mapping', None)
         event = super().update(instance, validated_data)
 
         # Meta data
@@ -151,6 +202,29 @@ class EventSerializer(I18nAwareModelSerializer):
                 if prop.name not in meta_data:
                     current_object.delete()
 
+        # Seats
+        if seat_category_mapping is not None or ('seating_plan' in validated_data and validated_data['seating_plan'] is None):
+            current_mappings = {
+                m.layout_category: m
+                for m in event.seat_category_mappings.filter(subevent=None)
+            }
+            if not event.seating_plan:
+                seat_category_mapping = {}
+            for key, value in seat_category_mapping.items():
+                if key in current_mappings:
+                    m = current_mappings.pop(key)
+                    m.product = value
+                    m.save()
+                else:
+                    event.seat_category_mappings.create(product=value, layout_category=key)
+            for m in current_mappings.values():
+                m.delete()
+        if 'seating_plan' in validated_data or seat_category_mapping is not None:
+            generate_seats(event, None, event.seating_plan, {
+                m.layout_category: m.product
+                for m in event.seat_category_mappings.select_related('product').filter(subevent=None)
+            })
+
         # Plugins
         if plugins is not None:
             event.set_active_plugins(plugins)
@@ -196,14 +270,15 @@ class SubEventItemVariationSerializer(I18nAwareModelSerializer):
 class SubEventSerializer(I18nAwareModelSerializer):
     item_price_overrides = SubEventItemSerializer(source='subeventitem_set', many=True, required=False)
     variation_price_overrides = SubEventItemVariationSerializer(source='subeventitemvariation_set', many=True, required=False)
+    seat_category_mapping = SeatCategoryMappingField(source='*', required=False)
     event = SlugRelatedField(slug_field='slug', read_only=True)
     meta_data = MetaDataField(source='*')
 
     class Meta:
         model = SubEvent
         fields = ('id', 'name', 'date_from', 'date_to', 'active', 'date_admission',
-                  'presale_start', 'presale_end', 'location', 'event', 'is_public',
+                  'presale_start', 'presale_end', 'location', 'event', 'is_public', 'seating_plan',
-                  'item_price_overrides', 'variation_price_overrides', 'meta_data')
+                  'item_price_overrides', 'variation_price_overrides', 'meta_data', 'seat_category_mapping')
 
     def validate(self, data):
         data = super().validate(data)
@@ -225,6 +300,25 @@ class SubEventSerializer(I18nAwareModelSerializer):
     def validate_variation_price_overrides(self, data):
         return list(filter(lambda i: 'variation' in i, data))
 
+    def validate_seating_plan(self, value):
+        if value and value.organizer != self.context['request'].organizer:
+            raise ValidationError('Invalid seating plan.')
+        if self.instance and self.instance.pk:
+            try:
+                validate_plan_change(self.context['request'].event, self.instance, value)
+            except SeatProtected as e:
+                raise ValidationError(str(e))
+        return value
+
+    def validate_seat_category_mapping(self, value):
+        item_cache = {i.pk: i for i in self.context['request'].event.items.all()}
+        result = {}
+        for k, item in value['seat_category_mapping'].items():
+            if item not in item_cache:
+                raise ValidationError('Item \'{id}\' does not exist.'.format(id=item))
+            result[k] = item_cache[item]
+        return {'seat_category_mapping': result}
+
     @cached_property
     def meta_properties(self):
         return {
@@ -242,6 +336,7 @@ class SubEventSerializer(I18nAwareModelSerializer):
         item_price_overrides_data = validated_data.pop('subeventitem_set') if 'subeventitem_set' in validated_data else {}
         variation_price_overrides_data = validated_data.pop('subeventitemvariation_set') if 'subeventitemvariation_set' in validated_data else {}
         meta_data = validated_data.pop('meta_data', None)
+        seat_category_mapping = validated_data.pop('seat_category_mapping', None)
         subevent = super().create(validated_data)
 
         for item_price_override_data in item_price_overrides_data:
@@ -257,6 +352,18 @@ class SubEventSerializer(I18nAwareModelSerializer):
                     value=value
                 )
 
+        # Seats
+        if subevent.seating_plan:
+            if seat_category_mapping is not None:
+                for key, value in seat_category_mapping.items():
+                    self.context['request'].event.seat_category_mappings.create(
+                        product=value, layout_category=key, subevent=subevent
+                    )
+            generate_seats(self.context['request'].event, subevent, subevent.seating_plan, {
+                m.layout_category: m.product
+                for m in self.context['request'].event.seat_category_mappings.select_related('product').filter(subevent=subevent)
+            })
+
         return subevent
 
     @transaction.atomic
@@ -264,6 +371,7 @@ class SubEventSerializer(I18nAwareModelSerializer):
         item_price_overrides_data = validated_data.pop('subeventitem_set') if 'subeventitem_set' in validated_data else {}
         variation_price_overrides_data = validated_data.pop('subeventitemvariation_set') if 'subeventitemvariation_set' in validated_data else {}
         meta_data = validated_data.pop('meta_data', None)
+        seat_category_mapping = validated_data.pop('seat_category_mapping', None)
         subevent = super().update(instance, validated_data)
 
         existing_item_overrides = {item.item: item.id for item in SubEventItem.objects.filter(subevent=subevent)}
@@ -300,6 +408,31 @@ class SubEventSerializer(I18nAwareModelSerializer):
                 if prop.name not in meta_data:
                     current_object.delete()
 
+        # Seats
+        if seat_category_mapping is not None or ('seating_plan' in validated_data and validated_data['seating_plan'] is None):
+            current_mappings = {
+                m.layout_category: m
+                for m in self.context['request'].event.seat_category_mappings.filter(subevent=subevent)
+            }
+            if not subevent.seating_plan:
+                seat_category_mapping = {}
+            for key, value in seat_category_mapping.items():
+                if key in current_mappings:
+                    m = current_mappings.pop(key)
+                    m.product = value
+                    m.save()
+                else:
+                    self.context['request'].event.seat_category_mappings.create(
+                        product=value, layout_category=key, subevent=subevent
+                    )
+            for m in current_mappings.values():
+                m.delete()
+        if 'seating_plan' in validated_data or seat_category_mapping is not None:
+            generate_seats(self.context['request'].event, subevent, subevent.seating_plan, {
+                m.layout_category: m.product
+                for m in self.context['request'].event.seat_category_mappings.select_related('product').filter(subevent=subevent)
+            })
+
         return subevent
 
 

src/pretix/api/serializers/item.py

@@ -118,7 +118,8 @@ class ItemSerializer(I18nAwareModelSerializer):
                   'position', 'picture', 'available_from', 'available_until',
                   'require_voucher', 'hide_without_voucher', 'allow_cancel', 'require_bundling',
                   'min_per_order', 'max_per_order', 'checkin_attention', 'has_variations', 'variations',
-                  'addons', 'bundles', 'original_price', 'require_approval', 'generate_tickets')
+                  'addons', 'bundles', 'original_price', 'require_approval', 'generate_tickets',
+                  'show_quota_left', 'hidden_if_available', 'allow_waitinglist')
         read_only_fields = ('has_variations', 'picture')
 
     def get_serializer_context(self):
@@ -200,15 +201,25 @@ class InlineQuestionOptionSerializer(I18nAwareModelSerializer):
         fields = ('id', 'identifier', 'answer', 'position')
 
 
+class LegacyDependencyValueField(serializers.CharField):
+
+    def to_representation(self, obj):
+        return obj[0] if obj else None
+
+    def to_internal_value(self, data):
+        return [data] if data else []
+
+
 class QuestionSerializer(I18nAwareModelSerializer):
     options = InlineQuestionOptionSerializer(many=True, required=False)
     identifier = serializers.CharField(allow_null=True)
+    dependency_value = LegacyDependencyValueField(source='dependency_values', required=False, allow_null=True)
 
     class Meta:
         model = Question
         fields = ('id', 'question', 'type', 'required', 'items', 'options', 'position',
-                  'ask_during_checkin', 'identifier', 'dependency_question', 'dependency_value',
+                  'ask_during_checkin', 'identifier', 'dependency_question', 'dependency_values',
-                  'hidden')
+                  'hidden', 'dependency_value', 'print_on_invoice')
 
     def validate_identifier(self, value):
         Question._clean_identifier(self.context['event'], value, self.instance)
@@ -262,6 +273,7 @@ class QuestionSerializer(I18nAwareModelSerializer):
     def create(self, validated_data):
         options_data = validated_data.pop('options') if 'options' in validated_data else []
         items = validated_data.pop('items')
+
         question = Question.objects.create(**validated_data)
         question.items.set(items)
         for opt_data in options_data:
@@ -273,7 +285,7 @@ class QuotaSerializer(I18nAwareModelSerializer):
 
     class Meta:
         model = Quota
-        fields = ('id', 'name', 'size', 'items', 'variations', 'subevent')
+        fields = ('id', 'name', 'size', 'items', 'variations', 'subevent', 'closed', 'close_when_sold_out')
 
     def validate(self, data):
         data = super().validate(data)

src/pretix/api/serializers/order.py

@@ -2,6 +2,8 @@ import json
 from collections import Counter
 from decimal import Decimal
 
+import pycountry
+from django.db.models import F, Q
 from django.utils.timezone import now
 from django.utils.translation import ugettext_lazy
 from django_countries.fields import Country
@@ -15,13 +17,17 @@ from pretix.base.channels import get_all_sales_channels
 from pretix.base.i18n import language
 from pretix.base.models import (
     Checkin, Invoice, InvoiceAddress, InvoiceLine, Item, ItemVariation, Order,
-    OrderPosition, Question, QuestionAnswer, SubEvent,
+    OrderPosition, Question, QuestionAnswer, Seat, SubEvent, Voucher,
 )
 from pretix.base.models.orders import (
     CartPosition, OrderFee, OrderPayment, OrderRefund,
 )
 from pretix.base.pdf import get_variables
+from pretix.base.services.cart import error_messages
+from pretix.base.services.pricing import get_price
+from pretix.base.settings import COUNTRIES_WITH_STATE_IN_ADDRESS
 from pretix.base.signals import register_ticket_outputs
+from pretix.multidomain.urlreverse import build_absolute_uri
 
 
 class CompatibleCountryField(serializers.Field):
@@ -42,8 +48,8 @@ class InvoiceAddressSerializer(I18nAwareModelSerializer):
     class Meta:
         model = InvoiceAddress
         fields = ('last_modified', 'is_business', 'company', 'name', 'name_parts', 'street', 'zipcode', 'city', 'country',
-                  'vat_id', 'vat_id_validated', 'internal_reference')
+                  'state', 'vat_id', 'vat_id_validated', 'internal_reference')
-        read_only_fields = ('last_modified', 'vat_id_validated')
+        read_only_fields = ('last_modified',)
 
     def __init__(self, *args, **kwargs):
         super().__init__(*args, **kwargs)
@@ -58,6 +64,24 @@ class InvoiceAddressSerializer(I18nAwareModelSerializer):
             )
         if data.get('name_parts') and '_scheme' not in data.get('name_parts'):
             data['name_parts']['_scheme'] = self.context['request'].event.settings.name_scheme
+
+        if data.get('country'):
+            if not pycountry.countries.get(alpha_2=data.get('country')):
+                raise ValidationError(
+                    {'country': ['Invalid country code.']}
+                )
+
+        if data.get('state'):
+            cc = str(data.get('country') or self.instance.country or '')
+            if cc not in COUNTRIES_WITH_STATE_IN_ADDRESS:
+                raise ValidationError(
+                    {'state': ['States are not supported in country "{}".'.format(cc)]}
+                )
+            if not pycountry.subdivisions.get(code=cc + '-' + data.get('state')):
+                raise ValidationError(
+                    {'state': ['"{}" is not a known subdivision of the country "{}".'.format(data.get('state'), cc)]}
+                )
+
         return data
 
 
@@ -71,6 +95,13 @@ class AnswerQuestionOptionsIdentifierField(serializers.Field):
         return [o.identifier for o in instance.options.all()]
 
 
+class InlineSeatSerializer(I18nAwareModelSerializer):
+
+    class Meta:
+        model = Seat
+        fields = ('id', 'name', 'seat_guid')
+
+
 class AnswerSerializer(I18nAwareModelSerializer):
     question_identifier = AnswerQuestionIdentifierField(source='*', read_only=True)
     option_identifiers = AnswerQuestionOptionsIdentifierField(source='*', read_only=True)
@@ -83,7 +114,7 @@ class AnswerSerializer(I18nAwareModelSerializer):
 class CheckinSerializer(I18nAwareModelSerializer):
     class Meta:
         model = Checkin
-        fields = ('datetime', 'list')
+        fields = ('datetime', 'list', 'auto_checked_in')
 
 
 class OrderDownloadsField(serializers.Field):
@@ -166,12 +197,13 @@ class OrderPositionSerializer(I18nAwareModelSerializer):
     downloads = PositionDownloadsField(source='*')
     order = serializers.SlugRelatedField(slug_field='code', read_only=True)
     pdf_data = PdfDataSerializer(source='*')
+    seat = InlineSeatSerializer(read_only=True)
 
     class Meta:
         model = OrderPosition
         fields = ('id', 'order', 'positionid', 'item', 'variation', 'price', 'attendee_name', 'attendee_name_parts',
                   'attendee_email', 'voucher', 'tax_rate', 'tax_value', 'secret', 'addon_to', 'subevent', 'checkins',
-                  'downloads', 'answers', 'tax_rule', 'pseudonymization_id', 'pdf_data')
+                  'downloads', 'answers', 'tax_rule', 'pseudonymization_id', 'pdf_data', 'seat')
 
     def __init__(self, *args, **kwargs):
         super().__init__(*args, **kwargs)
@@ -254,10 +286,33 @@ class OrderFeeSerializer(I18nAwareModelSerializer):
         fields = ('fee_type', 'value', 'description', 'internal_type', 'tax_rate', 'tax_value', 'tax_rule')
 
 
+class PaymentURLField(serializers.URLField):
+    def to_representation(self, instance: OrderPayment):
+        if instance.state != OrderPayment.PAYMENT_STATE_CREATED:
+            return None
+        return build_absolute_uri(self.context['event'], 'presale:event.order.pay', kwargs={
+            'order': instance.order.code,
+            'secret': instance.order.secret,
+            'payment': instance.pk,
+        })
+
+
+class PaymentDetailsField(serializers.Field):
+    def to_representation(self, value: OrderPayment):
+        pp = value.payment_provider
+        if not pp:
+            return {}
+        return pp.api_payment_details(value)
+
+
 class OrderPaymentSerializer(I18nAwareModelSerializer):
+    payment_url = PaymentURLField(source='*', allow_null=True, read_only=True)
+    details = PaymentDetailsField(source='*', allow_null=True, read_only=True)
+
     class Meta:
         model = OrderPayment
-        fields = ('local_id', 'state', 'amount', 'created', 'payment_date', 'provider')
+        fields = ('local_id', 'state', 'amount', 'created', 'payment_date', 'provider', 'payment_url',
+                  'details')
 
 
 class OrderRefundSerializer(I18nAwareModelSerializer):
@@ -268,6 +323,14 @@ class OrderRefundSerializer(I18nAwareModelSerializer):
         fields = ('local_id', 'state', 'source', 'amount', 'payment', 'created', 'execution_date', 'provider')
 
 
+class OrderURLField(serializers.URLField):
+    def to_representation(self, instance: Order):
+        return build_absolute_uri(self.context['event'], 'presale:event.order', kwargs={
+            'order': instance.code,
+            'secret': instance.secret,
+        })
+
+
 class OrderSerializer(I18nAwareModelSerializer):
     invoice_address = InvoiceAddressSerializer(allow_null=True)
     positions = OrderPositionSerializer(many=True, read_only=True)
@@ -277,13 +340,15 @@ class OrderSerializer(I18nAwareModelSerializer):
     refunds = OrderRefundSerializer(many=True, read_only=True)
     payment_date = OrderPaymentDateField(source='*', read_only=True)
     payment_provider = OrderPaymentTypeField(source='*', read_only=True)
+    url = OrderURLField(source='*', read_only=True)
 
     class Meta:
         model = Order
         fields = (
             'code', 'status', 'testmode', 'secret', 'email', 'locale', 'datetime', 'expires', 'payment_date',
             'payment_provider', 'fees', 'total', 'comment', 'invoice_address', 'positions', 'downloads',
-            'checkin_attention', 'last_modified', 'payments', 'refunds', 'require_approval', 'sales_channel'
+            'checkin_attention', 'last_modified', 'payments', 'refunds', 'require_approval', 'sales_channel',
+            'url'
         )
         read_only_fields = (
             'code', 'status', 'testmode', 'secret', 'datetime', 'expires', 'payment_date',
@@ -305,7 +370,6 @@ class OrderSerializer(I18nAwareModelSerializer):
         # Even though all fields that shouldn't be edited are marked as read_only in the serializer
         # (hopefully), we'll be extra careful here and be explicit about the model fields we update.
         update_fields = ['comment', 'checkin_attention', 'email', 'locale']
-        print(validated_data)
 
         if 'invoice_address' in validated_data:
             iadata = validated_data.pop('invoice_address')
@@ -323,7 +387,7 @@ class OrderSerializer(I18nAwareModelSerializer):
                     }
                 try:
                     ia = instance.invoice_address
-                    if iadata.get('vat_id') != ia.vat_id:
+                    if iadata.get('vat_id') != ia.vat_id and 'vat_id_validated' not in iadata:
                         ia.vat_id_validated = False
                     self.fields['invoice_address'].update(ia, iadata)
                 except InvoiceAddress.DoesNotExist:
@@ -430,11 +494,16 @@ class OrderPositionCreateSerializer(I18nAwareModelSerializer):
     addon_to = serializers.IntegerField(required=False, allow_null=True)
     secret = serializers.CharField(required=False)
     attendee_name = serializers.CharField(required=False, allow_null=True)
+    seat = serializers.CharField(required=False, allow_null=True)
+    price = serializers.DecimalField(required=False, allow_null=True, decimal_places=2,
+                                     max_digits=10)
+    voucher = serializers.SlugRelatedField(slug_field='code', queryset=Voucher.objects.none(),
+                                           required=False, allow_null=True)
 
     class Meta:
         model = OrderPosition
         fields = ('positionid', 'item', 'variation', 'price', 'attendee_name', 'attendee_name_parts', 'attendee_email',
-                  'secret', 'addon_to', 'subevent', 'answers')
+                  'secret', 'addon_to', 'subevent', 'answers', 'seat', 'voucher')
 
     def validate_secret(self, secret):
         if secret and OrderPosition.all.filter(order__event=self.context['event'], secret=secret).exists():
@@ -508,7 +577,7 @@ class CompatibleJSONField(serializers.JSONField):
 
 class OrderCreateSerializer(I18nAwareModelSerializer):
     invoice_address = InvoiceAddressSerializer(required=False)
-    positions = OrderPositionCreateSerializer(many=True, required=False)
+    positions = OrderPositionCreateSerializer(many=True, required=True)
     fees = OrderFeeCreateSerializer(many=True, required=False)
     status = serializers.ChoiceField(choices=(
         ('n', Order.STATUS_PENDING),
@@ -520,18 +589,26 @@ class OrderCreateSerializer(I18nAwareModelSerializer):
         min_length=5
     )
     comment = serializers.CharField(required=False, allow_blank=True)
-    payment_provider = serializers.CharField(required=True)
+    payment_provider = serializers.CharField(required=False, allow_null=True)
     payment_info = CompatibleJSONField(required=False)
     consume_carts = serializers.ListField(child=serializers.CharField(), required=False)
     force = serializers.BooleanField(default=False, required=False)
     payment_date = serializers.DateTimeField(required=False, allow_null=True)
+    send_mail = serializers.BooleanField(default=False, required=False)
+
+    def __init__(self, *args, **kwargs):
+        super().__init__(*args, **kwargs)
+        self.fields['positions'].child.fields['voucher'].queryset = self.context['event'].vouchers.all()
 
     class Meta:
         model = Order
         fields = ('code', 'status', 'testmode', 'email', 'locale', 'payment_provider', 'fees', 'comment', 'sales_channel',
-                  'invoice_address', 'positions', 'checkin_attention', 'payment_info', 'payment_date', 'consume_carts', 'force')
+                  'invoice_address', 'positions', 'checkin_attention', 'payment_info', 'payment_date', 'consume_carts',
+                  'force', 'send_mail')
 
     def validate_payment_provider(self, pp):
+        if pp is None:
+            return None
         if pp not in self.context['event'].get_payment_providers():
             raise ValidationError('The given payment provider is not known.')
         return pp
@@ -590,6 +667,9 @@ class OrderCreateSerializer(I18nAwareModelSerializer):
                 {'positionid': ["If you set addon_to on any position, you need to specify position IDs manually."]}
                 for p in data
             ]
+        else:
+            for i, p in enumerate(data):
+                p['positionid'] = i + 1
 
         if any(errs):
             raise ValidationError(errs)
@@ -598,10 +678,11 @@ class OrderCreateSerializer(I18nAwareModelSerializer):
     def create(self, validated_data):
         fees_data = validated_data.pop('fees') if 'fees' in validated_data else []
         positions_data = validated_data.pop('positions') if 'positions' in validated_data else []
-        payment_provider = validated_data.pop('payment_provider')
+        payment_provider = validated_data.pop('payment_provider', None)
         payment_info = validated_data.pop('payment_info', '{}')
         payment_date = validated_data.pop('payment_date', now())
         force = validated_data.pop('force', False)
+        self._send_mail = validated_data.pop('send_mail', False)
 
         if 'invoice_address' in validated_data:
             iadata = validated_data.pop('invoice_address')
@@ -615,13 +696,16 @@ class OrderCreateSerializer(I18nAwareModelSerializer):
             ia = None
 
         with self.context['event'].lock() as now_dt:
-            quotadiff = Counter()
+            free_seats = set()
-
+            seats_seen = set()
             consume_carts = validated_data.pop('consume_carts', [])
             delete_cps = []
             quota_avail_cache = {}
+            voucher_usage = Counter()
             if consume_carts:
-                for cp in CartPosition.objects.filter(event=self.context['event'], cart_id__in=consume_carts):
+                for cp in CartPosition.objects.filter(
+                    event=self.context['event'], cart_id__in=consume_carts, expires__gt=now()
+                ):
                     quotas = (cp.variation.quotas.filter(subevent=cp.subevent)
                               if cp.variation else cp.item.quotas.filter(subevent=cp.subevent))
                     for quota in quotas:
@@ -629,14 +713,64 @@ class OrderCreateSerializer(I18nAwareModelSerializer):
                             quota_avail_cache[quota] = list(quota.availability())
                         if quota_avail_cache[quota][1] is not None:
                             quota_avail_cache[quota][1] += 1
+                    if cp.voucher:
+                        voucher_usage[cp.voucher] -= 1
                     if cp.expires > now_dt:
-                        quotadiff.subtract(quotas)
+                        if cp.seat:
+                            free_seats.add(cp.seat)
                     delete_cps.append(cp)
 
             errs = [{} for p in positions_data]
 
+            for i, pos_data in enumerate(positions_data):
+                if pos_data.get('voucher'):
+                    v = pos_data['voucher']
+
+                    if not v.applies_to(pos_data['item'], pos_data.get('variation')):
+                        errs[i]['voucher'] = [error_messages['voucher_invalid_item']]
+                        continue
+
+                    if v.subevent_id and pos_data.get('subevent').pk != v.subevent_id:
+                        errs[i]['voucher'] = [error_messages['voucher_invalid_subevent']]
+                        continue
+
+                    if v.valid_until is not None and v.valid_until < now_dt:
+                        errs[i]['voucher'] = [error_messages['voucher_expired']]
+                        continue
+
+                    voucher_usage[v] += 1
+                    if voucher_usage[v] > 0:
+                        redeemed_in_carts = CartPosition.objects.filter(
+                            Q(voucher=pos_data['voucher']) & Q(event=self.context['event']) & Q(expires__gte=now_dt)
+                        ).exclude(pk__in=[cp.pk for cp in delete_cps])
+                        v_avail = v.max_usages - v.redeemed - redeemed_in_carts.count()
+                        if v_avail < voucher_usage[v]:
+                            errs[i]['voucher'] = [
+                                'The voucher has already been used the maximum number of times.'
+                            ]
+
+                seated = pos_data.get('item').seat_category_mappings.filter(subevent=pos_data.get('subevent')).exists()
+                if pos_data.get('seat'):
+                    if not seated:
+                        errs[i]['seat'] = ['The specified product does not allow to choose a seat.']
+                    try:
+                        seat = self.context['event'].seats.get(seat_guid=pos_data['seat'], subevent=pos_data.get('subevent'))
+                    except Seat.DoesNotExist:
+                        errs[i]['seat'] = ['The specified seat does not exist.']
+                    else:
+                        pos_data['seat'] = seat
+                        if (seat not in free_seats and not seat.is_available()) or seat in seats_seen:
+                            errs[i]['seat'] = [ugettext_lazy('The selected seat "{seat}" is not available.').format(seat=seat.name)]
+                        seats_seen.add(seat)
+                elif seated:
+                    errs[i]['seat'] = ['The specified product requires to choose a seat.']
+
             if not force:
                 for i, pos_data in enumerate(positions_data):
+                    if pos_data.get('voucher'):
+                        if pos_data['voucher'].allow_ignore_quota or pos_data['voucher'].block_quota:
+                            continue
+
                     new_quotas = (pos_data.get('variation').quotas.filter(subevent=pos_data.get('subevent'))
                                   if pos_data.get('variation')
                                   else pos_data.get('item').quotas.filter(subevent=pos_data.get('subevent')))
@@ -658,8 +792,6 @@ class OrderCreateSerializer(I18nAwareModelSerializer):
                                         )
                                     ]
 
-                    quotadiff.update(new_quotas)
-
             if any(errs):
                 raise ValidationError({'positions': errs})
 
@@ -667,38 +799,14 @@ class OrderCreateSerializer(I18nAwareModelSerializer):
                 validated_data['locale'] = self.context['event'].settings.locale
             order = Order(event=self.context['event'], **validated_data)
             order.set_expires(subevents=[p.get('subevent') for p in positions_data])
-            order.total = sum([p['price'] for p in positions_data]) + sum([f['value'] for f in fees_data], Decimal('0.00'))
             order.meta_info = "{}"
+            order.total = Decimal('0.00')
             order.save()
 
-            if order.total == Decimal('0.00') and validated_data.get('status') != Order.STATUS_PAID:
-                order.status = Order.STATUS_PAID
-                order.save()
-                order.payments.create(
-                    amount=order.total, provider='free', state=OrderPayment.PAYMENT_STATE_CONFIRMED,
-                    payment_date=now()
-                )
-            elif payment_provider == "free" and order.total != Decimal('0.00'):
-                raise ValidationError('You cannot use the "free" payment provider for non-free orders.')
-            elif validated_data.get('status') == Order.STATUS_PAID:
-                order.payments.create(
-                    amount=order.total,
-                    provider=payment_provider,
-                    info=payment_info,
-                    payment_date=payment_date,
-                    state=OrderPayment.PAYMENT_STATE_CONFIRMED
-                )
-            elif payment_provider:
-                order.payments.create(
-                    amount=order.total,
-                    provider=payment_provider,
-                    info=payment_info,
-                    state=OrderPayment.PAYMENT_STATE_CREATED
-                )
-
             if ia:
                 ia.order = order
                 ia.save()
+
             pos_map = {}
             for pos_data in positions_data:
                 answers_data = pos_data.pop('answers', [])
@@ -710,9 +818,27 @@ class OrderCreateSerializer(I18nAwareModelSerializer):
                     }
                 pos = OrderPosition(**pos_data)
                 pos.order = order
-                pos._calculate_tax()
                 if addon_to:
                     pos.addon_to = pos_map[addon_to]
+
+                if pos.price is None:
+                    price = get_price(
+                        item=pos.item,
+                        variation=pos.variation,
+                        voucher=pos.voucher,
+                        custom_price=None,
+                        subevent=pos.subevent,
+                        addon_to=pos.addon_to,
+                        invoice_address=ia,
+                    )
+                    pos.price = price.gross
+                    pos.tax_rate = price.rate
+                    pos.tax_value = price.tax
+                    pos.tax_rule = pos.item.tax_rule
+                else:
+                    pos._calculate_tax()
+                if pos.voucher:
+                    Voucher.objects.filter(pk=pos.voucher.pk).update(redeemed=F('redeemed') + 1)
                 pos.save()
                 pos_map[pos.positionid] = pos
                 for answ_data in answers_data:
@@ -722,12 +848,43 @@ class OrderCreateSerializer(I18nAwareModelSerializer):
 
             for cp in delete_cps:
                 cp.delete()
+
         for fee_data in fees_data:
             f = OrderFee(**fee_data)
             f.order = order
             f._calculate_tax()
             f.save()
 
+        order.total = sum([p.price for p in order.positions.all()]) + sum([f.value for f in order.fees.all()])
+        order.save(update_fields=['total'])
+
+        if order.total == Decimal('0.00') and validated_data.get('status') != Order.STATUS_PAID:
+            order.status = Order.STATUS_PAID
+            order.save()
+            order.payments.create(
+                amount=order.total, provider='free', state=OrderPayment.PAYMENT_STATE_CONFIRMED,
+                payment_date=now()
+            )
+        elif payment_provider == "free" and order.total != Decimal('0.00'):
+            raise ValidationError('You cannot use the "free" payment provider for non-free orders.')
+        elif validated_data.get('status') == Order.STATUS_PAID:
+            if not payment_provider:
+                raise ValidationError('You cannot create a paid order without a payment provider.')
+            order.payments.create(
+                amount=order.total,
+                provider=payment_provider,
+                info=payment_info,
+                payment_date=payment_date,
+                state=OrderPayment.PAYMENT_STATE_CONFIRMED
+            )
+        elif payment_provider:
+            order.payments.create(
+                amount=order.total,
+                provider=payment_provider,
+                info=payment_info,
+                state=OrderPayment.PAYMENT_STATE_CREATED
+            )
+
         return order
 
 

src/pretix/api/serializers/organizer.py

@@ -1,8 +1,20 @@
 from pretix.api.serializers.i18n import I18nAwareModelSerializer
-from pretix.base.models import Organizer
+from pretix.api.serializers.order import CompatibleJSONField
+from pretix.base.models import Organizer, SeatingPlan
+from pretix.base.models.seating import SeatingPlanLayoutValidator
 
 
 class OrganizerSerializer(I18nAwareModelSerializer):
     class Meta:
         model = Organizer
         fields = ('name', 'slug')
+
+
+class SeatingPlanSerializer(I18nAwareModelSerializer):
+    layout = CompatibleJSONField(
+        validators=[SeatingPlanLayoutValidator()]
+    )
+
+    class Meta:
+        model = SeatingPlan
+        fields = ('id', 'name', 'layout')

src/pretix/api/serializers/voucher.py

@@ -27,7 +27,7 @@ class VoucherSerializer(I18nAwareModelSerializer):
         model = Voucher
         fields = ('id', 'code', 'max_usages', 'redeemed', 'valid_until', 'block_quota',
                   'allow_ignore_quota', 'price_mode', 'value', 'item', 'variation', 'quota',
-                  'tag', 'comment', 'subevent')
+                  'tag', 'comment', 'subevent', 'show_hidden_items')
         read_only_fields = ('id', 'redeemed')
         list_serializer_class = VoucherListSerializer
 

src/pretix/api/signals.py

@@ -2,6 +2,7 @@ from datetime import timedelta
 
 from django.dispatch import Signal, receiver
 from django.utils.timezone import now
+from django_scopes import scopes_disabled
 
 from pretix.api.models import ApiCall, WebHookCall
 from pretix.base.signals import periodic_task
@@ -17,10 +18,12 @@ instances.
 
 
 @receiver(periodic_task)
+@scopes_disabled()
 def cleanup_webhook_logs(sender, **kwargs):
     WebHookCall.objects.filter(datetime__lte=now() - timedelta(days=30)).delete()
 
 
 @receiver(periodic_task)
+@scopes_disabled()
 def cleanup_api_logs(sender, **kwargs):
     ApiCall.objects.filter(created__lte=now() - timedelta(hours=24)).delete()

src/pretix/api/urls.py

@@ -18,6 +18,7 @@ orga_router = routers.DefaultRouter()
 orga_router.register(r'events', event.EventViewSet)
 orga_router.register(r'subevents', event.SubEventViewSet)
 orga_router.register(r'webhooks', webhooks.WebHookViewSet)
+orga_router.register(r'seatingplans', organizer.SeatingPlanViewSet)
 
 event_router = routers.DefaultRouter()
 event_router.register(r'subevents', event.SubEventViewSet)

src/pretix/api/views/cart.py

@@ -24,7 +24,7 @@ class CartPositionViewSet(CreateModelMixin, DestroyModelMixin, viewsets.ReadOnly
         return CartPosition.objects.filter(
             event=self.request.event,
             cart_id__endswith="@api"
-        )
+        ).select_related('seat').prefetch_related('answers')
 
     def get_serializer_context(self):
         ctx = super().get_serializer_context()

src/pretix/api/views/checkin.py

@@ -6,6 +6,7 @@ from django.shortcuts import get_object_or_404
 from django.utils.functional import cached_property
 from django.utils.timezone import now
 from django_filters.rest_framework import DjangoFilterBackend, FilterSet
+from django_scopes import scopes_disabled
 from rest_framework import viewsets
 from rest_framework.decorators import action
 from rest_framework.fields import DateTimeField
@@ -24,11 +25,11 @@ from pretix.base.services.checkin import (
 )
 from pretix.helpers.database import FixedOrderBy
 
-
+with scopes_disabled():
-class CheckinListFilter(FilterSet):
+    class CheckinListFilter(FilterSet):
-    class Meta:
+        class Meta:
-        model = CheckinList
+            model = CheckinList
-        fields = ['subevent']
+            fields = ['subevent']
 
 
 class CheckinListViewSet(viewsets.ModelViewSet):
@@ -43,7 +44,6 @@ class CheckinListViewSet(viewsets.ModelViewSet):
         qs = self.request.event.checkin_lists.prefetch_related(
             'limit_products',
         )
-        qs = CheckinList.annotate_with_numbers(qs, self.request.event)
         return qs
 
     def perform_create(self, serializer):
@@ -92,6 +92,7 @@ class CheckinListViewSet(viewsets.ModelViewSet):
         )
         if not clist.all_products:
             pqs = pqs.filter(item__in=clist.limit_products.values_list('id', flat=True))
+            cqs = cqs.filter(position__item__in=clist.limit_products.values_list('id', flat=True))
 
         ev = clist.subevent or clist.event
         response = {
@@ -146,15 +147,16 @@ class CheckinListViewSet(viewsets.ModelViewSet):
         return Response(response)
 
 
-class CheckinOrderPositionFilter(OrderPositionFilter):
+with scopes_disabled():
+    class CheckinOrderPositionFilter(OrderPositionFilter):
 
-    def has_checkin_qs(self, queryset, name, value):
+        def has_checkin_qs(self, queryset, name, value):
-        return queryset.filter(last_checked_in__isnull=not value)
+            return queryset.filter(last_checked_in__isnull=not value)
 
 
 class CheckinListPositionViewSet(viewsets.ReadOnlyModelViewSet):
     serializer_class = CheckinListOrderPositionSerializer
-    queryset = OrderPosition.objects.none()
+    queryset = OrderPosition.all.none()
     filter_backends = (DjangoFilterBackend, RichOrderingFilter)
     ordering = ('attendee_name_cached', 'positionid')
     ordering_fields = (
@@ -229,7 +231,7 @@ class CheckinListPositionViewSet(viewsets.ReadOnlyModelViewSet):
                     )
                 ))
             ).select_related(
-                'item', 'variation', 'item__category', 'addon_to', 'order', 'order__invoice_address'
+                'item', 'variation', 'item__category', 'addon_to', 'order', 'order__invoice_address', 'seat'
             )
         else:
             qs = qs.prefetch_related(
@@ -239,7 +241,7 @@ class CheckinListPositionViewSet(viewsets.ReadOnlyModelViewSet):
                 ),
                 'answers', 'answers__options', 'answers__question',
                 Prefetch('addons', OrderPosition.objects.select_related('item', 'variation'))
-            ).select_related('item', 'variation', 'order', 'addon_to', 'order__invoice_address', 'order')
+            ).select_related('item', 'variation', 'order', 'addon_to', 'order__invoice_address', 'order', 'seat')
 
         if not self.checkinlist.all_products:
             qs = qs.filter(item__in=self.checkinlist.limit_products.values_list('id', flat=True))
@@ -278,6 +280,7 @@ class CheckinListPositionViewSet(viewsets.ReadOnlyModelViewSet):
                 nonce=nonce,
                 datetime=dt,
                 questions_supported=self.request.data.get('questions_supported', True),
+                canceled_supported=self.request.data.get('canceled_supported', False),
                 user=self.request.user,
                 auth=self.request.auth,
             )

src/pretix/api/views/event.py

@@ -3,6 +3,7 @@ from django.db import transaction
 from django.db.models import ProtectedError, Q
 from django.utils.timezone import now
 from django_filters.rest_framework import DjangoFilterBackend, FilterSet
+from django_scopes import scopes_disabled
 from rest_framework import filters, viewsets
 from rest_framework.exceptions import PermissionDenied
 
@@ -18,51 +19,51 @@ from pretix.base.models import (
 from pretix.base.models.event import SubEvent
 from pretix.helpers.dicts import merge_dicts
 
+with scopes_disabled():
+    class EventFilter(FilterSet):
+        is_past = django_filters.rest_framework.BooleanFilter(method='is_past_qs')
+        is_future = django_filters.rest_framework.BooleanFilter(method='is_future_qs')
+        ends_after = django_filters.rest_framework.IsoDateTimeFilter(method='ends_after_qs')
 
-class EventFilter(FilterSet):
+        class Meta:
-    is_past = django_filters.rest_framework.BooleanFilter(method='is_past_qs')
+            model = Event
-    is_future = django_filters.rest_framework.BooleanFilter(method='is_future_qs')
+            fields = ['is_public', 'live', 'has_subevents']
-    ends_after = django_filters.rest_framework.IsoDateTimeFilter(method='ends_after_qs')
 
-    class Meta:
+        def ends_after_qs(self, queryset, name, value):
-        model = Event
+            expr = (
-        fields = ['is_public', 'live', 'has_subevents']
+                Q(has_subevents=False) &
-
+                Q(
-    def ends_after_qs(self, queryset, name, value):
+                    Q(Q(date_to__isnull=True) & Q(date_from__gte=value))
-        expr = (
+                    | Q(Q(date_to__isnull=False) & Q(date_to__gte=value))
-            Q(has_subevents=False) &
+                )
-            Q(
-                Q(Q(date_to__isnull=True) & Q(date_from__gte=value))
-                | Q(Q(date_to__isnull=False) & Q(date_to__gte=value))
             )
-        )
-        return queryset.filter(expr)
-
-    def is_past_qs(self, queryset, name, value):
-        expr = (
-            Q(has_subevents=False) &
-            Q(
-                Q(Q(date_to__isnull=True) & Q(date_from__lt=now()))
-                | Q(Q(date_to__isnull=False) & Q(date_to__lt=now()))
-            )
-        )
-        if value:
             return queryset.filter(expr)
-        else:
-            return queryset.exclude(expr)
 
-    def is_future_qs(self, queryset, name, value):
+        def is_past_qs(self, queryset, name, value):
-        expr = (
+            expr = (
-            Q(has_subevents=False) &
+                Q(has_subevents=False) &
-            Q(
+                Q(
-                Q(Q(date_to__isnull=True) & Q(date_from__gte=now()))
+                    Q(Q(date_to__isnull=True) & Q(date_from__lt=now()))
-                | Q(Q(date_to__isnull=False) & Q(date_to__gte=now()))
+                    | Q(Q(date_to__isnull=False) & Q(date_to__lt=now()))
+                )
             )
-        )
+            if value:
-        if value:
+                return queryset.filter(expr)
-            return queryset.filter(expr)
+            else:
-        else:
+                return queryset.exclude(expr)
-            return queryset.exclude(expr)
+
+        def is_future_qs(self, queryset, name, value):
+            expr = (
+                Q(has_subevents=False) &
+                Q(
+                    Q(Q(date_to__isnull=True) & Q(date_from__gte=now()))
+                    | Q(Q(date_to__isnull=False) & Q(date_to__gte=now()))
+                )
+            )
+            if value:
+                return queryset.filter(expr)
+            else:
+                return queryset.exclude(expr)
 
 
 class EventViewSet(viewsets.ModelViewSet):
@@ -85,7 +86,7 @@ class EventViewSet(viewsets.ModelViewSet):
             )
 
         return qs.prefetch_related(
-            'meta_values', 'meta_values__property'
+            'meta_values', 'meta_values__property', 'seat_category_mappings'
         )
 
     def perform_update(self, serializer):
@@ -182,41 +183,42 @@ class CloneEventViewSet(viewsets.ModelViewSet):
         )
 
 
-class SubEventFilter(FilterSet):
+with scopes_disabled():
-    is_past = django_filters.rest_framework.BooleanFilter(method='is_past_qs')
+    class SubEventFilter(FilterSet):
-    is_future = django_filters.rest_framework.BooleanFilter(method='is_future_qs')
+        is_past = django_filters.rest_framework.BooleanFilter(method='is_past_qs')
-    ends_after = django_filters.rest_framework.IsoDateTimeFilter(method='ends_after_qs')
+        is_future = django_filters.rest_framework.BooleanFilter(method='is_future_qs')
+        ends_after = django_filters.rest_framework.IsoDateTimeFilter(method='ends_after_qs')
 
-    class Meta:
+        class Meta:
-        model = SubEvent
+            model = SubEvent
-        fields = ['active', 'event__live']
+            fields = ['active', 'event__live']
 
-    def ends_after_qs(self, queryset, name, value):
+        def ends_after_qs(self, queryset, name, value):
-        expr = Q(
+            expr = Q(
-            Q(Q(date_to__isnull=True) & Q(date_from__gte=value))
+                Q(Q(date_to__isnull=True) & Q(date_from__gte=value))
-            | Q(Q(date_to__isnull=False) & Q(date_to__gte=value))
+                | Q(Q(date_to__isnull=False) & Q(date_to__gte=value))
-        )
+            )
-        return queryset.filter(expr)
-
-    def is_past_qs(self, queryset, name, value):
-        expr = Q(
-            Q(Q(date_to__isnull=True) & Q(date_from__lt=now()))
-            | Q(Q(date_to__isnull=False) & Q(date_to__lt=now()))
-        )
-        if value:
             return queryset.filter(expr)
-        else:
-            return queryset.exclude(expr)
 
-    def is_future_qs(self, queryset, name, value):
+        def is_past_qs(self, queryset, name, value):
-        expr = Q(
+            expr = Q(
-            Q(Q(date_to__isnull=True) & Q(date_from__gte=now()))
+                Q(Q(date_to__isnull=True) & Q(date_from__lt=now()))
-            | Q(Q(date_to__isnull=False) & Q(date_to__gte=now()))
+                | Q(Q(date_to__isnull=False) & Q(date_to__lt=now()))
-        )
+            )
-        if value:
+            if value:
-            return queryset.filter(expr)
+                return queryset.filter(expr)
-        else:
+            else:
-            return queryset.exclude(expr)
+                return queryset.exclude(expr)
+
+        def is_future_qs(self, queryset, name, value):
+            expr = Q(
+                Q(Q(date_to__isnull=True) & Q(date_from__gte=now()))
+                | Q(Q(date_to__isnull=False) & Q(date_to__gte=now()))
+            )
+            if value:
+                return queryset.filter(expr)
+            else:
+                return queryset.exclude(expr)
 
 
 class SubEventViewSet(ConditionalListView, viewsets.ModelViewSet):
@@ -240,12 +242,18 @@ class SubEventViewSet(ConditionalListView, viewsets.ModelViewSet):
                 event__in=self.request.user.get_events_with_any_permission()
             )
         return qs.prefetch_related(
-            'subeventitem_set', 'subeventitemvariation_set'
+            'subeventitem_set', 'subeventitemvariation_set', 'seat_category_mappings'
         )
 
     def perform_update(self, serializer):
+        original_data = self.get_serializer(instance=serializer.instance).data
         super().perform_update(serializer)
 
+        if serializer.data == original_data:
+            # Performance optimization: If nothing was changed, we do not need to save or log anything.
+            # This costs us a few cycles on save, but avoids thousands of lines in our log.
+            return
+
         serializer.instance.log_action(
             'pretix.subevent.changed',
             user=self.request.user,

src/pretix/api/views/item.py

@@ -3,6 +3,7 @@ from django.db.models import Q
 from django.shortcuts import get_object_or_404
 from django.utils.functional import cached_property
 from django_filters.rest_framework import DjangoFilterBackend, FilterSet
+from django_scopes import scopes_disabled
 from rest_framework import viewsets
 from rest_framework.decorators import action
 from rest_framework.exceptions import PermissionDenied
@@ -21,19 +22,19 @@ from pretix.base.models import (
 )
 from pretix.helpers.dicts import merge_dicts
 
+with scopes_disabled():
+    class ItemFilter(FilterSet):
+        tax_rate = django_filters.CharFilter(method='tax_rate_qs')
 
-class ItemFilter(FilterSet):
+        def tax_rate_qs(self, queryset, name, value):
-    tax_rate = django_filters.CharFilter(method='tax_rate_qs')
+            if value in ("0", "None", "0.00"):
+                return queryset.filter(Q(tax_rule__isnull=True) | Q(tax_rule__rate=0))
+            else:
+                return queryset.filter(tax_rule__rate=value)
 
-    def tax_rate_qs(self, queryset, name, value):
+        class Meta:
-        if value in ("0", "None", "0.00"):
+            model = Item
-            return queryset.filter(Q(tax_rule__isnull=True) | Q(tax_rule__rate=0))
+            fields = ['active', 'category', 'admission', 'tax_rate', 'free_price']
-        else:
-            return queryset.filter(tax_rule__rate=value)
-
-    class Meta:
-        model = Item
-        fields = ['active', 'category', 'admission', 'tax_rate', 'free_price']
 
 
 class ItemViewSet(ConditionalListView, viewsets.ModelViewSet):
@@ -65,7 +66,14 @@ class ItemViewSet(ConditionalListView, viewsets.ModelViewSet):
         return ctx
 
     def perform_update(self, serializer):
+        original_data = self.get_serializer(instance=serializer.instance).data
+
         serializer.save(event=self.request.event)
+
+        if serializer.data == original_data:
+            # Performance optimization: If nothing was changed, we do not need to save or log anything.
+            # This costs us a few cycles on save, but avoids thousands of lines in our log.
+            return
         serializer.instance.log_action(
             'pretix.event.item.changed',
             user=self.request.user,
@@ -312,10 +320,11 @@ class ItemCategoryViewSet(ConditionalListView, viewsets.ModelViewSet):
         super().perform_destroy(instance)
 
 
-class QuestionFilter(FilterSet):
+with scopes_disabled():
-    class Meta:
+    class QuestionFilter(FilterSet):
-        model = Question
+        class Meta:
-        fields = ['ask_during_checkin', 'required', 'identifier']
+            model = Question
+            fields = ['ask_during_checkin', 'required', 'identifier']
 
 
 class QuestionViewSet(ConditionalListView, viewsets.ModelViewSet):
@@ -411,10 +420,11 @@ class QuestionOptionViewSet(viewsets.ModelViewSet):
         super().perform_destroy(instance)
 
 
-class QuotaFilter(FilterSet):
+with scopes_disabled():
-    class Meta:
+    class QuotaFilter(FilterSet):
-        model = Quota
+        class Meta:
-        fields = ['subevent']
+            model = Quota
+            fields = ['subevent']
 
 
 class QuotaViewSet(ConditionalListView, viewsets.ModelViewSet):
@@ -452,9 +462,30 @@ class QuotaViewSet(ConditionalListView, viewsets.ModelViewSet):
         return ctx
 
     def perform_update(self, serializer):
+        original_data = self.get_serializer(instance=serializer.instance).data
+
         current_subevent = serializer.instance.subevent
         serializer.save(event=self.request.event)
         request_subevent = serializer.instance.subevent
+
+        if serializer.data == original_data:
+            # Performance optimization: If nothing was changed, we do not need to save or log anything.
+            # This costs us a few cycles on save, but avoids thousands of lines in our log.
+            return
+
+        if original_data['closed'] is True and serializer.instance.closed is False:
+            serializer.instance.log_action(
+                'pretix.event.quota.opened',
+                user=self.request.user,
+                auth=self.request.auth,
+            )
+        elif original_data['closed'] is False and serializer.instance.closed is True:
+            serializer.instance.log_action(
+                'pretix.event.quota.closed',
+                user=self.request.user,
+                auth=self.request.auth,
+            )
+
         serializer.instance.log_action(
             'pretix.event.quota.changed',
             user=self.request.user,

src/pretix/api/views/order.py

@@ -11,6 +11,7 @@ from django.shortcuts import get_object_or_404
 from django.utils.timezone import make_aware, now
 from django.utils.translation import ugettext as _
 from django_filters.rest_framework import DjangoFilterBackend, FilterSet
+from django_scopes import scopes_disabled
 from rest_framework import mixins, serializers, status, viewsets
 from rest_framework.decorators import action
 from rest_framework.exceptions import (
@@ -40,7 +41,8 @@ from pretix.base.services.invoices import (
 )
 from pretix.base.services.mail import SendMailException
 from pretix.base.services.orders import (
-    OrderChangeManager, OrderError, approve_order, cancel_order, deny_order,
+    OrderChangeManager, OrderError, _order_placed_email,
+    _order_placed_email_attendee, approve_order, cancel_order, deny_order,
     extend_order, mark_order_expired, mark_order_refunded,
 )
 from pretix.base.services.pricing import get_price
@@ -50,17 +52,17 @@ from pretix.base.signals import (
 )
 from pretix.base.templatetags.money import money_filter
 
+with scopes_disabled():
+    class OrderFilter(FilterSet):
+        email = django_filters.CharFilter(field_name='email', lookup_expr='iexact')
+        code = django_filters.CharFilter(field_name='code', lookup_expr='iexact')
+        status = django_filters.CharFilter(field_name='status', lookup_expr='iexact')
+        modified_since = django_filters.IsoDateTimeFilter(field_name='last_modified', lookup_expr='gte')
+        created_since = django_filters.IsoDateTimeFilter(field_name='datetime', lookup_expr='gte')
 
-class OrderFilter(FilterSet):
+        class Meta:
-    email = django_filters.CharFilter(field_name='email', lookup_expr='iexact')
+            model = Order
-    code = django_filters.CharFilter(field_name='code', lookup_expr='iexact')
+            fields = ['code', 'status', 'email', 'locale', 'testmode', 'require_approval']
-    status = django_filters.CharFilter(field_name='status', lookup_expr='iexact')
-    modified_since = django_filters.IsoDateTimeFilter(field_name='last_modified', lookup_expr='gte')
-    created_since = django_filters.IsoDateTimeFilter(field_name='datetime', lookup_expr='gte')
-
-    class Meta:
-        model = Order
-        fields = ['code', 'status', 'email', 'locale', 'testmode', 'require_approval']
 
 
 class OrderViewSet(viewsets.ModelViewSet):
@@ -92,8 +94,8 @@ class OrderViewSet(viewsets.ModelViewSet):
                     'positions',
                     OrderPosition.objects.all().prefetch_related(
                         'checkins', 'item', 'variation', 'answers', 'answers__options', 'answers__question',
-                        'item__category', 'addon_to',
+                        'item__category', 'addon_to', 'seat',
-                        Prefetch('addons', OrderPosition.objects.select_related('item', 'variation'))
+                        Prefetch('addons', OrderPosition.objects.select_related('item', 'variation', 'seat'))
                     )
                 )
             )
@@ -102,7 +104,7 @@ class OrderViewSet(viewsets.ModelViewSet):
                 Prefetch(
                     'positions',
                     OrderPosition.objects.all().prefetch_related(
-                        'checkins', 'item', 'variation', 'answers', 'answers__options', 'answers__question',
+                        'checkins', 'item', 'variation', 'answers', 'answers__options', 'answers__question', 'seat',
                     )
                 )
             )
@@ -430,6 +432,7 @@ class OrderViewSet(viewsets.ModelViewSet):
         serializer.is_valid(raise_exception=True)
         with transaction.atomic():
             self.perform_create(serializer)
+            send_mail = serializer._send_mail
             order = serializer.instance
             serializer = OrderSerializer(order, context=serializer.context)
 
@@ -444,8 +447,42 @@ class OrderViewSet(viewsets.ModelViewSet):
             (order.event.settings.get('invoice_generate') == 'True') or
             (order.event.settings.get('invoice_generate') == 'paid' and order.status == Order.STATUS_PAID)
         ) and not order.invoices.last()
+        invoice = None
         if gen_invoice:
-            generate_invoice(order, trigger_pdf=True)
+            invoice = generate_invoice(order, trigger_pdf=True)
+
+        if send_mail:
+            payment = order.payments.last()
+            free_flow = (
+                payment and order.total == Decimal('0.00') and order.status == Order.STATUS_PAID and
+                not order.require_approval and payment.provider == "free"
+            )
+            if free_flow:
+                email_template = request.event.settings.mail_text_order_free
+                log_entry = 'pretix.event.order.email.order_free'
+                email_attendees = request.event.settings.mail_send_order_free_attendee
+                email_attendees_template = request.event.settings.mail_text_order_free_attendee
+            else:
+                email_template = request.event.settings.mail_text_order_placed
+                log_entry = 'pretix.event.order.email.order_placed'
+                email_attendees = request.event.settings.mail_send_order_placed_attendee
+                email_attendees_template = request.event.settings.mail_text_order_placed_attendee
+
+            _order_placed_email(
+                request.event, order, payment.payment_provider if payment else None, email_template,
+                log_entry, invoice, payment
+            )
+            if email_attendees:
+                for p in order.positions.all():
+                    if p.addon_to_id is None and p.attendee_email and p.attendee_email != order.email:
+                        _order_placed_email_attendee(request.event, order, p, email_attendees_template, log_entry)
+
+            if not free_flow and order.status == Order.STATUS_PAID and payment:
+                payment._send_paid_mail(invoice, None, '')
+                if self.request.event.settings.mail_send_order_paid_attendee:
+                    for p in order.positions.all():
+                        if p.addon_to_id is None and p.attendee_email and p.attendee_email != order.email:
+                            payment._send_paid_mail_attendee(p, None)
 
         headers = self.get_success_headers(serializer.data)
         return Response(serializer.data, status=status.HTTP_201_CREATED, headers=headers)
@@ -531,48 +568,49 @@ class OrderViewSet(viewsets.ModelViewSet):
             self.get_object().gracefully_delete(user=self.request.user if self.request.user.is_authenticated else None, auth=self.request.auth)
 
 
-class OrderPositionFilter(FilterSet):
+with scopes_disabled():
-    order = django_filters.CharFilter(field_name='order', lookup_expr='code__iexact')
+    class OrderPositionFilter(FilterSet):
-    has_checkin = django_filters.rest_framework.BooleanFilter(method='has_checkin_qs')
+        order = django_filters.CharFilter(field_name='order', lookup_expr='code__iexact')
-    attendee_name = django_filters.CharFilter(method='attendee_name_qs')
+        has_checkin = django_filters.rest_framework.BooleanFilter(method='has_checkin_qs')
-    search = django_filters.CharFilter(method='search_qs')
+        attendee_name = django_filters.CharFilter(method='attendee_name_qs')
+        search = django_filters.CharFilter(method='search_qs')
 
-    def search_qs(self, queryset, name, value):
+        def search_qs(self, queryset, name, value):
-        return queryset.filter(
+            return queryset.filter(
-            Q(secret__istartswith=value)
+                Q(secret__istartswith=value)
-            | Q(attendee_name_cached__icontains=value)
+                | Q(attendee_name_cached__icontains=value)
-            | Q(addon_to__attendee_name_cached__icontains=value)
+                | Q(addon_to__attendee_name_cached__icontains=value)
-            | Q(attendee_email__icontains=value)
+                | Q(attendee_email__icontains=value)
-            | Q(addon_to__attendee_email__icontains=value)
+                | Q(addon_to__attendee_email__icontains=value)
-            | Q(order__code__istartswith=value)
+                | Q(order__code__istartswith=value)
-            | Q(order__invoice_address__name_cached__icontains=value)
+                | Q(order__invoice_address__name_cached__icontains=value)
-            | Q(order__email__icontains=value)
+                | Q(order__email__icontains=value)
-        )
+            )
 
-    def has_checkin_qs(self, queryset, name, value):
+        def has_checkin_qs(self, queryset, name, value):
-        return queryset.filter(checkins__isnull=not value)
+            return queryset.filter(checkins__isnull=not value)
 
-    def attendee_name_qs(self, queryset, name, value):
+        def attendee_name_qs(self, queryset, name, value):
-        return queryset.filter(Q(attendee_name_cached__iexact=value) | Q(addon_to__attendee_name_cached__iexact=value))
+            return queryset.filter(Q(attendee_name_cached__iexact=value) | Q(addon_to__attendee_name_cached__iexact=value))
 
-    class Meta:
+        class Meta:
-        model = OrderPosition
+            model = OrderPosition
-        fields = {
+            fields = {
-            'item': ['exact', 'in'],
+                'item': ['exact', 'in'],
-            'variation': ['exact', 'in'],
+                'variation': ['exact', 'in'],
-            'secret': ['exact'],
+                'secret': ['exact'],
-            'order__status': ['exact', 'in'],
+                'order__status': ['exact', 'in'],
-            'addon_to': ['exact', 'in'],
+                'addon_to': ['exact', 'in'],
-            'subevent': ['exact', 'in'],
+                'subevent': ['exact', 'in'],
-            'pseudonymization_id': ['exact'],
+                'pseudonymization_id': ['exact'],
-            'voucher__code': ['exact'],
+                'voucher__code': ['exact'],
-            'voucher': ['exact'],
+                'voucher': ['exact'],
-        }
+            }
 
 
 class OrderPositionViewSet(mixins.DestroyModelMixin, viewsets.ReadOnlyModelViewSet):
     serializer_class = OrderPositionSerializer
-    queryset = OrderPosition.objects.none()
+    queryset = OrderPosition.all.none()
     filter_backends = (DjangoFilterBackend, OrderingFilter)
     ordering = ('order__datetime', 'positionid')
     ordering_fields = ('order__code', 'order__datetime', 'positionid', 'attendee_name', 'order__status',)
@@ -609,13 +647,13 @@ class OrderPositionViewSet(mixins.DestroyModelMixin, viewsets.ReadOnlyModelViewS
                     )
                 ))
             ).select_related(
-                'item', 'variation', 'item__category', 'addon_to'
+                'item', 'variation', 'item__category', 'addon_to', 'seat'
             )
         else:
             qs = qs.prefetch_related(
                 'checkins', 'answers', 'answers__options', 'answers__question'
             ).select_related(
-                'item', 'order', 'order__event', 'order__event__organizer'
+                'item', 'order', 'order__event', 'order__event__organizer', 'seat'
             )
         return qs
 
@@ -960,22 +998,23 @@ class RefundViewSet(CreateModelMixin, viewsets.ReadOnlyModelViewSet):
         serializer.save()
 
 
-class InvoiceFilter(FilterSet):
+with scopes_disabled():
-    refers = django_filters.CharFilter(method='refers_qs')
+    class InvoiceFilter(FilterSet):
-    number = django_filters.CharFilter(method='nr_qs')
+        refers = django_filters.CharFilter(method='refers_qs')
-    order = django_filters.CharFilter(field_name='order', lookup_expr='code__iexact')
+        number = django_filters.CharFilter(method='nr_qs')
+        order = django_filters.CharFilter(field_name='order', lookup_expr='code__iexact')
 
-    def refers_qs(self, queryset, name, value):
+        def refers_qs(self, queryset, name, value):
-        return queryset.annotate(
+            return queryset.annotate(
-            refers_nr=Concat('refers__prefix', 'refers__invoice_no')
+                refers_nr=Concat('refers__prefix', 'refers__invoice_no')
-        ).filter(refers_nr__iexact=value)
+            ).filter(refers_nr__iexact=value)
 
-    def nr_qs(self, queryset, name, value):
+        def nr_qs(self, queryset, name, value):
-        return queryset.filter(nr__iexact=value)
+            return queryset.filter(nr__iexact=value)
 
-    class Meta:
+        class Meta:
-        model = Invoice
+            model = Invoice
-        fields = ['order', 'number', 'is_cancellation', 'refers', 'locale']
+            fields = ['order', 'number', 'is_cancellation', 'refers', 'locale']
 
 
 class RetryException(APIException):

src/pretix/api/views/organizer.py

@@ -1,8 +1,12 @@
 from rest_framework import filters, viewsets
+from rest_framework.exceptions import PermissionDenied
 
 from pretix.api.models import OAuthAccessToken
-from pretix.api.serializers.organizer import OrganizerSerializer
+from pretix.api.serializers.organizer import (
-from pretix.base.models import Organizer
+    OrganizerSerializer, SeatingPlanSerializer,
+)
+from pretix.base.models import Organizer, SeatingPlan
+from pretix.helpers.dicts import merge_dicts
 
 
 class OrganizerViewSet(viewsets.ReadOnlyModelViewSet):
@@ -30,3 +34,50 @@ class OrganizerViewSet(viewsets.ReadOnlyModelViewSet):
             return Organizer.objects.filter(pk=self.request.auth.organizer_id)
         else:
             return Organizer.objects.filter(pk=self.request.auth.team.organizer_id)
+
+
+class SeatingPlanViewSet(viewsets.ModelViewSet):
+    serializer_class = SeatingPlanSerializer
+    queryset = SeatingPlan.objects.none()
+    permission = 'can_change_organizer_settings'
+    write_permission = 'can_change_organizer_settings'
+
+    def get_queryset(self):
+        return self.request.organizer.seating_plans.all()
+
+    def get_serializer_context(self):
+        ctx = super().get_serializer_context()
+        ctx['organizer'] = self.request.organizer
+        return ctx
+
+    def perform_create(self, serializer):
+        inst = serializer.save(organizer=self.request.organizer)
+        self.request.organizer.log_action(
+            'pretix.seatingplan.added',
+            user=self.request.user,
+            auth=self.request.auth,
+            data=merge_dicts(self.request.data, {'id': inst.pk})
+        )
+
+    def perform_update(self, serializer):
+        if serializer.instance.events.exists() or serializer.instance.subevents.exists():
+            raise PermissionDenied('This plan can not be changed while it is in use for an event.')
+        inst = serializer.save(organizer=self.request.organizer)
+        self.request.organizer.log_action(
+            'pretix.seatingplan.changed',
+            user=self.request.user,
+            auth=self.request.auth,
+            data=merge_dicts(self.request.data, {'id': serializer.instance.pk})
+        )
+        return inst
+
+    def perform_destroy(self, instance):
+        if instance.events.exists() or instance.subevents.exists():
+            raise PermissionDenied('This plan can not be deleted while it is in use for an event.')
+        instance.log_action(
+            'pretix.seatingplan.deleted',
+            user=self.request.user,
+            auth=self.request.auth,
+            data={'id': instance.pk}
+        )
+        instance.delete()

src/pretix/api/views/voucher.py

@@ -6,6 +6,7 @@ from django.utils.timezone import now
 from django_filters.rest_framework import (
     BooleanFilter, DjangoFilterBackend, FilterSet,
 )
+from django_scopes import scopes_disabled
 from rest_framework import status, viewsets
 from rest_framework.decorators import action
 from rest_framework.exceptions import PermissionDenied
@@ -15,22 +16,22 @@ from rest_framework.response import Response
 from pretix.api.serializers.voucher import VoucherSerializer
 from pretix.base.models import Voucher
 
+with scopes_disabled():
+    class VoucherFilter(FilterSet):
+        active = BooleanFilter(method='filter_active')
 
-class VoucherFilter(FilterSet):
+        class Meta:
-    active = BooleanFilter(method='filter_active')
+            model = Voucher
+            fields = ['code', 'max_usages', 'redeemed', 'block_quota', 'allow_ignore_quota',
+                      'price_mode', 'value', 'item', 'variation', 'quota', 'tag', 'subevent']
 
-    class Meta:
+        def filter_active(self, queryset, name, value):
-        model = Voucher
+            if value:
-        fields = ['code', 'max_usages', 'redeemed', 'block_quota', 'allow_ignore_quota',
+                return queryset.filter(Q(redeemed__lt=F('max_usages')) &
-                  'price_mode', 'value', 'item', 'variation', 'quota', 'tag', 'subevent']
+                                       (Q(valid_until__isnull=True) | Q(valid_until__gt=now())))
-
+            else:
-    def filter_active(self, queryset, name, value):
+                return queryset.filter(Q(redeemed__gte=F('max_usages')) |
-        if value:
+                                       (Q(valid_until__isnull=False) & Q(valid_until__lte=now())))
-            return queryset.filter(Q(redeemed__lt=F('max_usages')) &
-                                   (Q(valid_until__isnull=True) | Q(valid_until__gt=now())))
-        else:
-            return queryset.filter(Q(redeemed__gte=F('max_usages')) |
-                                   (Q(valid_until__isnull=False) & Q(valid_until__lte=now())))
 
 
 class VoucherViewSet(viewsets.ModelViewSet):

src/pretix/api/views/waitinglist.py

@@ -1,5 +1,6 @@
 import django_filters
 from django_filters.rest_framework import DjangoFilterBackend, FilterSet
+from django_scopes import scopes_disabled
 from rest_framework import viewsets
 from rest_framework.decorators import action
 from rest_framework.exceptions import PermissionDenied, ValidationError
@@ -10,16 +11,16 @@ from pretix.api.serializers.waitinglist import WaitingListSerializer
 from pretix.base.models import WaitingListEntry
 from pretix.base.models.waitinglist import WaitingListException
 
+with scopes_disabled():
+    class WaitingListFilter(FilterSet):
+        has_voucher = django_filters.rest_framework.BooleanFilter(method='has_voucher_qs')
 
-class WaitingListFilter(FilterSet):
+        def has_voucher_qs(self, queryset, name, value):
-    has_voucher = django_filters.rest_framework.BooleanFilter(method='has_voucher_qs')
+            return queryset.filter(voucher__isnull=not value)
 
-    def has_voucher_qs(self, queryset, name, value):
+        class Meta:
-        return queryset.filter(voucher__isnull=not value)
+            model = WaitingListEntry
-
+            fields = ['item', 'variation', 'email', 'locale', 'has_voucher', 'subevent']
-    class Meta:
-        model = WaitingListEntry
-        fields = ['item', 'variation', 'email', 'locale', 'has_voucher', 'subevent']
 
 
 class WaitingListViewSet(viewsets.ModelViewSet):

src/pretix/api/webhooks.py

@@ -8,6 +8,7 @@ from celery.exceptions import MaxRetriesExceededError
 from django.db.models import Exists, OuterRef, Q
 from django.dispatch import receiver
 from django.utils.translation import ugettext_lazy as _
+from django_scopes import scope, scopes_disabled
 from requests import RequestException
 
 from pretix.api.models import WebHook, WebHookCall, WebHookEventListener
@@ -203,51 +204,52 @@ def notify_webhooks(logentry_id: int):
 @app.task(base=ProfiledTask, bind=True, max_retries=9)
 def send_webhook(self, logentry_id: int, action_type: str, webhook_id: int):
     # 9 retries with 2**(2*x) timing is roughly 72 hours
-    logentry = LogEntry.all.get(id=logentry_id)
+    with scopes_disabled():
-    webhook = WebHook.objects.get(id=webhook_id)
+        webhook = WebHook.objects.get(id=webhook_id)
+    with scope(organizer=webhook.organizer):
+        logentry = LogEntry.all.get(id=logentry_id)
+        types = get_all_webhook_events()
+        event_type = types.get(action_type)
+        if not event_type or not webhook.enabled:
+            return  # Ignore, e.g. plugin not installed
 
-    types = get_all_webhook_events()
+        payload = event_type.build_payload(logentry)
-    event_type = types.get(action_type)
+        t = time.time()
-    if not event_type or not webhook.enabled:
-        return  # Ignore, e.g. plugin not installed
 
-    payload = event_type.build_payload(logentry)
-    t = time.time()
-
-    try:
         try:
-            resp = requests.post(
+            try:
-                webhook.target_url,
+                resp = requests.post(
-                json=payload,
+                    webhook.target_url,
-                allow_redirects=False
+                    json=payload,
-            )
+                    allow_redirects=False
-            WebHookCall.objects.create(
+                )
-                webhook=webhook,
+                WebHookCall.objects.create(
-                action_type=logentry.action_type,
+                    webhook=webhook,
-                target_url=webhook.target_url,
+                    action_type=logentry.action_type,
-                is_retry=self.request.retries > 0,
+                    target_url=webhook.target_url,
-                execution_time=time.time() - t,
+                    is_retry=self.request.retries > 0,
-                return_code=resp.status_code,
+                    execution_time=time.time() - t,
-                payload=json.dumps(payload),
+                    return_code=resp.status_code,
-                response_body=resp.text[:1024 * 1024],
+                    payload=json.dumps(payload),
-                success=200 <= resp.status_code <= 299
+                    response_body=resp.text[:1024 * 1024],
-            )
+                    success=200 <= resp.status_code <= 299
-            if resp.status_code == 410:
+                )
-                webhook.enabled = False
+                if resp.status_code == 410:
-                webhook.save()
+                    webhook.enabled = False
-            elif resp.status_code > 299:
+                    webhook.save()
+                elif resp.status_code > 299:
+                    raise self.retry(countdown=2 ** (self.request.retries * 2))
+            except RequestException as e:
+                WebHookCall.objects.create(
+                    webhook=webhook,
+                    action_type=logentry.action_type,
+                    target_url=webhook.target_url,
+                    is_retry=self.request.retries > 0,
+                    execution_time=time.time() - t,
+                    return_code=0,
+                    payload=json.dumps(payload),
+                    response_body=str(e)[:1024 * 1024]
+                )
                 raise self.retry(countdown=2 ** (self.request.retries * 2))
-        except RequestException as e:
+        except MaxRetriesExceededError:
-            WebHookCall.objects.create(
+            pass
-                webhook=webhook,
-                action_type=logentry.action_type,
-                target_url=webhook.target_url,
-                is_retry=self.request.retries > 0,
-                execution_time=time.time() - t,
-                return_code=0,
-                payload=json.dumps(payload),
-                response_body=str(e)[:1024 * 1024]
-            )
-            raise self.retry(countdown=2 ** (self.request.retries * 2))
-    except MaxRetriesExceededError:
-        pass

src/pretix/base/__init__.py

@@ -13,7 +13,7 @@ class PretixBaseConfig(AppConfig):
         from . import invoice  # NOQA
         from . import notifications  # NOQA
         from . import email  # NOQA
-        from .services import auth, export, mail, tickets, cart, orders, invoices, cleanup, update_check, quotas, notifications  # NOQA
+        from .services import auth, checkin, export, mail, tickets, cart, orders, invoices, cleanup, update_check, quotas, notifications  # NOQA
 
         try:
             from .celery_app import app as celery_app  # NOQA

src/pretix/base/banlist.py

@@ -0,0 +1,80 @@
+import re
+
+# banlist based on http://www.bannedwordlist.com/lists/swearWords.txt
+banlist = [
+    "anal",
+    "anus",
+    "arse",
+    "ass",
+    "balls",
+    "bastard",
+    "bitch",
+    "biatch",
+    "bloody",
+    "blowjob",
+    "bollock",
+    "bollok",
+    "boner",
+    "boob",
+    "bugger",
+    "bum",
+    "butt",
+    "clitoris",
+    "cock",
+    "coon",
+    "crap",
+    "cunt",
+    "damn",
+    "dick",
+    "dildo",
+    "dyke",
+    "fag",
+    "feck",
+    "fellate",
+    "fellatio",
+    "felching",
+    "fuck",
+    "fudgepacker",
+    "flange",
+    "goddamn",
+    "hell",
+    "homo",
+    "jerk",
+    "jizz",
+    "knobend",
+    "labia",
+    "lmao",
+    "lmfao",
+    "muff",
+    "nigger",
+    "nigga",
+    "omg",
+    "penis",
+    "piss",
+    "poop",
+    "prick",
+    "pube",
+    "pussy",
+    "queer",
+    "scrotum",
+    "sex",
+    "shit",
+    "sh1t",
+    "slut",
+    "smegma",
+    "spunk",
+    "tit",
+    "tosser",
+    "turd",
+    "twat",
+    "vagina",
+    "wank",
+    "whore",
+    "wtf"
+]
+
+blacklist_regex = re.compile('(' + '|'.join(banlist) + ')')
+
+
+def banned(string):
+    return bool(blacklist_regex.search(string.lower()))

src/pretix/base/context.py

@@ -0,0 +1,13 @@
+import sys
+
+from django.conf import settings
+
+
+def contextprocessor(request):
+    ctx = {}
+    if settings.DEBUG and 'runserver' not in sys.argv:
+        ctx['debug_warning'] = True
+    elif 'runserver' in sys.argv:
+        ctx['development_warning'] = True
+
+    return ctx

src/pretix/base/email.py

@@ -1,15 +1,23 @@
+import inspect
 import logging
+from datetime import timedelta
+from decimal import Decimal
 from smtplib import SMTPResponseException
 
 from django.conf import settings
 from django.core.mail.backends.smtp import EmailBackend
 from django.dispatch import receiver
 from django.template.loader import get_template
+from django.utils.timezone import now
 from django.utils.translation import ugettext_lazy as _
 from inlinestyler.utils import inline_css
 
-from pretix.base.models import Event, Order, OrderPosition
+from pretix.base.i18n import LazyCurrencyNumber, LazyDate, LazyNumber
-from pretix.base.signals import register_html_mail_renderers
+from pretix.base.models import Event
+from pretix.base.settings import PERSON_NAME_SCHEMES
+from pretix.base.signals import (
+    register_html_mail_renderers, register_mail_placeholders,
+)
 from pretix.base.templatetags.rich_text import markdown_compile_email
 
 logger = logging.getLogger('pretix.base.email')
@@ -44,8 +52,8 @@ class BaseHTMLMailRenderer:
     def __str__(self):
         return self.identifier
 
-    def render(self, plain_body: str, plain_signature: str, subject: str, order: Order=None,
+    def render(self, plain_body: str, plain_signature: str, subject: str, order=None,
-               position: OrderPosition=None) -> str:
+               position=None) -> str:
         """
         This method should generate the HTML part of the email.
 
@@ -97,7 +105,7 @@ class TemplateBasedMailRenderer(BaseHTMLMailRenderer):
     def template_name(self):
         raise NotImplementedError()
 
-    def render(self, plain_body: str, plain_signature: str, subject: str, order: Order, position: OrderPosition) -> str:
+    def render(self, plain_body: str, plain_signature: str, subject: str, order, position) -> str:
         body_md = markdown_compile_email(plain_body)
         htmlctx = {
             'site': settings.PRETIX_INSTANCE_NAME,
@@ -136,3 +144,285 @@ class ClassicMailRenderer(TemplateBasedMailRenderer):
 @receiver(register_html_mail_renderers, dispatch_uid="pretixbase_email_renderers")
 def base_renderers(sender, **kwargs):
     return [ClassicMailRenderer]
+
+
+class BaseMailTextPlaceholder:
+    """
+    This is the base class for for all email text placeholders.
+    """
+
+    @property
+    def required_context(self):
+        """
+        This property should return a list of all attribute names that need to be
+        contained in the base context so that this placeholder is available. By default,
+        it returns a list containing the string "event".
+        """
+        return ["event"]
+
+    @property
+    def identifier(self):
+        """
+        This should return the identifier of this placeholder in the email.
+        """
+        raise NotImplementedError()
+
+    def render(self, context):
+        """
+        This method is called to generate the actual text that is being
+        used in the email. You will be passed a context dictionary with the
+        base context attributes specified in ``required_context``. You are
+        expected to return a plain-text string.
+        """
+        raise NotImplementedError()
+
+    def render_sample(self, event):
+        """
+        This method is called to generate a text to be used in email previews.
+        This may only depend on the event.
+        """
+        raise NotImplementedError()
+
+
+class SimpleFunctionalMailTextPlaceholder(BaseMailTextPlaceholder):
+    def __init__(self, identifier, args, func, sample):
+        self._identifier = identifier
+        self._args = args
+        self._func = func
+        self._sample = sample
+
+    @property
+    def identifier(self):
+        return self._identifier
+
+    @property
+    def required_context(self):
+        return self._args
+
+    def render(self, context):
+        return self._func(**{k: context[k] for k in self._args})
+
+    def render_sample(self, event):
+        if callable(self._sample):
+            return self._sample(event)
+        else:
+            return self._sample
+
+
+def get_available_placeholders(event, base_parameters):
+    if 'order' in base_parameters:
+        base_parameters.append('invoice_address')
+    params = {}
+    for r, val in register_mail_placeholders.send(sender=event):
+        if not isinstance(val, (list, tuple)):
+            val = [val]
+        for v in val:
+            if all(rp in base_parameters for rp in v.required_context):
+                params[v.identifier] = v
+    return params
+
+
+def get_email_context(**kwargs):
+    from pretix.base.models import InvoiceAddress
+
+    event = kwargs['event']
+    if 'order' in kwargs:
+        try:
+            kwargs['invoice_address'] = kwargs['order'].invoice_address
+        except InvoiceAddress.DoesNotExist:
+            kwargs['invoice_address'] = InvoiceAddress()
+    ctx = {}
+    for r, val in register_mail_placeholders.send(sender=event):
+        if not isinstance(val, (list, tuple)):
+            val = [val]
+        for v in val:
+            if all(rp in kwargs for rp in v.required_context):
+                ctx[v.identifier] = v.render(kwargs)
+    return ctx
+
+
+def _placeholder_payment(order, payment):
+    if not payment:
+        return None
+    if 'payment' in inspect.signature(payment.payment_provider.order_pending_mail_render).parameters:
+        return str(payment.payment_provider.order_pending_mail_render(order, payment))
+    else:
+        return str(payment.payment_provider.order_pending_mail_render(order))
+
+
+@receiver(register_mail_placeholders, dispatch_uid="pretixbase_register_mail_placeholders")
+def base_placeholders(sender, **kwargs):
+    from pretix.base.models import InvoiceAddress
+    from pretix.multidomain.urlreverse import build_absolute_uri
+
+    ph = [
+        SimpleFunctionalMailTextPlaceholder(
+            'event', ['event'], lambda event: event.name, lambda event: event.name
+        ),
+        SimpleFunctionalMailTextPlaceholder(
+            'code', ['order'], lambda order: order.code, 'F8VVL'
+        ),
+        SimpleFunctionalMailTextPlaceholder(
+            'total', ['order'], lambda order: LazyNumber(order.total), lambda event: LazyNumber(Decimal('42.23'))
+        ),
+        SimpleFunctionalMailTextPlaceholder(
+            'currency', ['event'], lambda event: event.currency, lambda event: event.currency
+        ),
+        SimpleFunctionalMailTextPlaceholder(
+            'total_with_currency', ['event', 'order'], lambda event, order: LazyCurrencyNumber(order.total,
+                                                                                               event.currency),
+            lambda event: LazyCurrencyNumber(Decimal('42.23'), event.currency)
+        ),
+        SimpleFunctionalMailTextPlaceholder(
+            'expire_date', ['event', 'order'], lambda event, order: LazyDate(order.expires.astimezone(event.timezone)),
+            lambda event: LazyDate(now() + timedelta(days=15))
+            # TODO: This used to be "date" in some placeholders, add a migration!
+        ),
+        SimpleFunctionalMailTextPlaceholder(
+            'url', ['order', 'event'], lambda order, event: build_absolute_uri(
+                event,
+                'presale:event.order.open', kwargs={
+                    'order': order.code,
+                    'secret': order.secret,
+                    'hash': order.email_confirm_hash()
+                }
+            ), lambda event: build_absolute_uri(
+                event,
+                'presale:event.order.open', kwargs={
+                    'order': 'F8VVL',
+                    'secret': '6zzjnumtsx136ddy',
+                    'hash': '98kusd8ofsj8dnkd'
+                }
+            ),
+        ),
+        SimpleFunctionalMailTextPlaceholder(
+            'url', ['event', 'position'], lambda event, position: build_absolute_uri(
+                event,
+                'presale:event.order.position',
+                kwargs={
+                    'order': position.order.code,
+                    'secret': position.web_secret,
+                    'position': position.positionid
+                }
+            ),
+            lambda event: build_absolute_uri(
+                event,
+                'presale:event.order.position', kwargs={
+                    'order': 'F8VVL',
+                    'secret': '6zzjnumtsx136ddy',
+                    'position': '123'
+                }
+            ),
+        ),
+        SimpleFunctionalMailTextPlaceholder(
+            'url', ['waiting_list_entry', 'event'],
+            lambda waiting_list_entry, event: build_absolute_uri(
+                event, 'presale:event.redeem'
+            ) + '?voucher=' + waiting_list_entry.voucher.code,
+            lambda event: build_absolute_uri(
+                event,
+                'presale:event.redeem',
+            ) + '?voucher=68CYU2H6ZTP3WLK5',
+        ),
+        SimpleFunctionalMailTextPlaceholder(
+            'invoice_name', ['invoice_address'], lambda invoice_address: invoice_address.name or '',
+            _('John Doe')
+        ),
+        SimpleFunctionalMailTextPlaceholder(
+            'invoice_company', ['invoice_address'], lambda invoice_address: invoice_address.company or '',
+            _('Sample Corporation')
+        ),
+        SimpleFunctionalMailTextPlaceholder(
+            'orders', ['event', 'orders'], lambda event, orders: '\n' + '\n\n'.join(
+                '* {} - {}'.format(
+                    order.full_code,
+                    build_absolute_uri(event, 'presale:event.order', kwargs={
+                        'event': event.slug,
+                        'organizer': event.organizer.slug,
+                        'order': order.code,
+                        'secret': order.secret
+                    }),
+                )
+                for order in orders
+            ), lambda event: '\n' + '\n\n'.join(
+                '* {} - {}'.format(
+                    '{}-{}'.format(event.slug.upper(), order['code']),
+                    build_absolute_uri(event, 'presale:event.order', kwargs={
+                        'event': event.slug,
+                        'organizer': event.organizer.slug,
+                        'order': order['code'],
+                        'secret': order['secret']
+                    }),
+                )
+                for order in [
+                    {'code': 'F8VVL', 'secret': '6zzjnumtsx136ddy'},
+                    {'code': 'HIDHK', 'secret': '98kusd8ofsj8dnkd'},
+                    {'code': 'OPKSB', 'secret': '09pjdksflosk3njd'}
+                ]
+            ),
+        ),
+        SimpleFunctionalMailTextPlaceholder(
+            'hours', ['event', 'waiting_list_entry'], lambda event, waiting_list_entry:
+            event.settings.waiting_list_hours,
+            lambda event: event.settings.waiting_list_hours
+        ),
+        SimpleFunctionalMailTextPlaceholder(
+            'product', ['waiting_list_entry'], lambda waiting_list_entry: waiting_list_entry.item.name,
+            _('Sample Admission Ticket')
+        ),
+        SimpleFunctionalMailTextPlaceholder(
+            'code', ['waiting_list_entry'], lambda waiting_list_entry: waiting_list_entry.voucher.code,
+            '68CYU2H6ZTP3WLK5'
+        ),
+        SimpleFunctionalMailTextPlaceholder(
+            'comment', ['comment'], lambda comment: comment,
+            _('An individual text with a reason can be inserted here.'),
+        ),
+        SimpleFunctionalMailTextPlaceholder(
+            'payment_info', ['order', 'payment'], _placeholder_payment,
+            _('The amount has been charged to your card.'),
+        ),
+        SimpleFunctionalMailTextPlaceholder(
+            'payment_info', ['payment_info'], lambda payment_info: payment_info,
+            _('Please transfer money to this bank account: 9999-9999-9999-9999'),
+        ),
+        SimpleFunctionalMailTextPlaceholder(
+            'attendee_name', ['position'], lambda position: position.attendee_name,
+            _('John Doe'),
+        ),
+        SimpleFunctionalMailTextPlaceholder(
+            'name', ['position_or_address'],
+            lambda position_or_address: (
+                position_or_address.name
+                if isinstance(position_or_address, InvoiceAddress)
+                else position_or_address.attendee_name
+            ),
+            _('John Doe'),
+        ),
+    ]
+
+    name_scheme = PERSON_NAME_SCHEMES[sender.settings.name_scheme]
+    for f, l, w in name_scheme['fields']:
+        if f == 'full_name':
+            continue
+        ph.append(SimpleFunctionalMailTextPlaceholder(
+            'attendee_name_%s' % f, ['position'], lambda position, f=f: position.attendee_name_parts.get(f, ''),
+            name_scheme['sample'][f]
+        ))
+        ph.append(SimpleFunctionalMailTextPlaceholder(
+            'name_%s' % f, ['position_or_address'],
+            lambda position_or_address, f=f: (
+                position_or_address.name_parts.get(f, '')
+                if isinstance(position_or_address, InvoiceAddress)
+                else position_or_address.attendee_name_parts.get(f, '')
+            ),
+            name_scheme['sample'][f]
+        ))
+
+    for k, v in sender.meta_data.items():
+        ph.append(SimpleFunctionalMailTextPlaceholder(
+            'meta_%s' % k, ['event'], lambda event, k=k: event.meta_data[k],
+            v
+        ))
+
+    return ph

src/pretix/base/exporter.py

@@ -71,6 +71,8 @@ class BaseExporter:
 
         :type form_data: dict
         :param form_data: The form data of the export details form
+        :param output_file: You can optionally accept a parameter that will be given a file handle to write the
+                            output to. In this case, you can return None instead of the file content.
 
         Note: If you use a ``ModelChoiceField`` (or a ``ModelMultipleChoiceField``), the
         ``form_data`` will not contain the model instance but only it's primary key (or
@@ -109,16 +111,22 @@ class ListExporter(BaseExporter):
         raise NotImplementedError()  # noqa
 
     def get_filename(self):
-        return 'export.csv'
+        return 'export'
 
-    def _render_csv(self, form_data, **kwargs):
+    def _render_csv(self, form_data, output_file=None, **kwargs):
-        output = io.StringIO()
+        if output_file:
-        writer = csv.writer(output, **kwargs)
+            writer = csv.writer(output_file, **kwargs)
-        for line in self.iterate_list(form_data):
+            for line in self.iterate_list(form_data):
-            writer.writerow(line)
+                writer.writerow(line)
-        return self.get_filename() + '.csv', 'text/csv', output.getvalue().encode("utf-8")
+            return self.get_filename() + '.csv', 'text/csv', None
+        else:
+            output = io.StringIO()
+            writer = csv.writer(output, **kwargs)
+            for line in self.iterate_list(form_data):
+                writer.writerow(line)
+            return self.get_filename() + '.csv', 'text/csv', output.getvalue().encode("utf-8")
 
-    def _render_xlsx(self, form_data):
+    def _render_xlsx(self, form_data, output_file=None):
         wb = Workbook()
         ws = wb.get_active_sheet()
         try:
@@ -129,20 +137,24 @@ class ListExporter(BaseExporter):
             for j, val in enumerate(line):
                 ws.cell(row=i + 1, column=j + 1).value = str(val) if not isinstance(val, KNOWN_TYPES) else val
 
-        with tempfile.NamedTemporaryFile(suffix='.xlsx') as f:
+        if output_file:
-            wb.save(f.name)
+            wb.save(output_file)
-            f.seek(0)
+            return self.get_filename() + '.xlsx', 'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet', None
-            return self.get_filename() + '.xlsx', 'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet', f.read()
+        else:
+            with tempfile.NamedTemporaryFile(suffix='.xlsx') as f:
+                wb.save(f.name)
+                f.seek(0)
+                return self.get_filename() + '.xlsx', 'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet', f.read()
 
-    def render(self, form_data: dict) -> Tuple[str, str, bytes]:
+    def render(self, form_data: dict, output_file=None) -> Tuple[str, str, bytes]:
         if form_data.get('_format') == 'xlsx':
-            return self._render_xlsx(form_data)
+            return self._render_xlsx(form_data, output_file=output_file)
         elif form_data.get('_format') == 'default':
-            return self._render_csv(form_data, quoting=csv.QUOTE_NONNUMERIC, delimiter=',')
+            return self._render_csv(form_data, quoting=csv.QUOTE_NONNUMERIC, delimiter=',', output_file=output_file)
         elif form_data.get('_format') == 'csv-excel':
-            return self._render_csv(form_data, dialect='excel')
+            return self._render_csv(form_data, dialect='excel', output_file=output_file)
         elif form_data.get('_format') == 'semicolon':
-            return self._render_csv(form_data, dialect='excel', delimiter=';')
+            return self._render_csv(form_data, dialect='excel', delimiter=';', output_file=output_file)
 
 
 class MultiSheetListExporter(ListExporter):
@@ -180,14 +192,20 @@ class MultiSheetListExporter(ListExporter):
     def iterate_sheet(self, form_data, sheet):
         raise NotImplementedError()  # noqa
 
-    def _render_sheet_csv(self, form_data, sheet, **kwargs):
+    def _render_sheet_csv(self, form_data, sheet, output_file=None, **kwargs):
-        output = io.StringIO()
+        if output_file:
-        writer = csv.writer(output, **kwargs)
+            writer = csv.writer(output_file, **kwargs)
-        for line in self.iterate_sheet(form_data, sheet):
+            for line in self.iterate_sheet(form_data, sheet):
-            writer.writerow(line)
+                writer.writerow(line)
-        return self.get_filename() + '.csv', 'text/csv', output.getvalue().encode("utf-8")
+            return self.get_filename() + '.csv', 'text/csv', None
+        else:
+            output = io.StringIO()
+            writer = csv.writer(output, **kwargs)
+            for line in self.iterate_sheet(form_data, sheet):
+                writer.writerow(line)
+            return self.get_filename() + '.csv', 'text/csv', output.getvalue().encode("utf-8")
 
-    def _render_xlsx(self, form_data):
+    def _render_xlsx(self, form_data, output_file=None):
         wb = Workbook()
         ws = wb.get_active_sheet()
         wb.remove(ws)
@@ -197,19 +215,24 @@ class MultiSheetListExporter(ListExporter):
                 for j, val in enumerate(line):
                     ws.cell(row=i + 1, column=j + 1).value = str(val) if not isinstance(val, KNOWN_TYPES) else val
 
-        with tempfile.NamedTemporaryFile(suffix='.xlsx') as f:
+        if output_file:
-            wb.save(f.name)
+            wb.save(output_file)
-            f.seek(0)
+            return self.get_filename() + '.xlsx', 'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet', None
-            return self.get_filename() + '.xlsx', 'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet', f.read()
+        else:
+            with tempfile.NamedTemporaryFile(suffix='.xlsx') as f:
+                wb.save(f.name)
+                f.seek(0)
+                return self.get_filename() + '.xlsx', 'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet', f.read()
 
-    def render(self, form_data: dict) -> Tuple[str, str, bytes]:
+    def render(self, form_data: dict, output_file=None) -> Tuple[str, str, bytes]:
         if form_data.get('_format') == 'xlsx':
-            return self._render_xlsx(form_data)
+            return self._render_xlsx(form_data, output_file=output_file)
         elif ':' in form_data.get('_format'):
             sheet, f = form_data.get('_format').split(':')
             if f == 'default':
-                return self._render_sheet_csv(form_data, sheet, quoting=csv.QUOTE_NONNUMERIC, delimiter=',')
+                return self._render_sheet_csv(form_data, sheet, quoting=csv.QUOTE_NONNUMERIC, delimiter=',',
+                                              output_file=output_file)
             elif f == 'excel':
-                return self._render_sheet_csv(form_data, sheet, dialect='excel')
+                return self._render_sheet_csv(form_data, sheet, dialect='excel', output_file=output_file)
             elif f == 'semicolon':
-                return self._render_sheet_csv(form_data, sheet, dialect='excel', delimiter=';')
+                return self._render_sheet_csv(form_data, sheet, dialect='excel', delimiter=';', output_file=output_file)

src/pretix/base/exporters/dekodi.py

@@ -129,8 +129,11 @@ class DekodiNREIExporter(BaseExporter):
             'DIDt': invoice.order.datetime.isoformat().replace('Z', '+00:00'),
             'DT': '30' if invoice.is_cancellation else '10',
             'EM': invoice.order.email,
-            'FamN': invoice.invoice_to_name.rsplit(' ', 1)[-1],
+            'FamN': invoice.invoice_to_name.rsplit(' ', 1)[-1] if invoice.invoice_to_name else '',
-            'FN': invoice.invoice_to_name.rsplit(' ', 1)[0] if ' ' in invoice.invoice_to_name else '',
+            'FN': (
+                invoice.invoice_to_name.rsplit(' ', 1)[0]
+                if invoice.invoice_to_name and ' ' in invoice.invoice_to_name else ''
+            ),
             'IDt': invoice.date.isoformat() + 'T08:00:00+01:00',
             'INo': invoice.full_invoice_no,
             'IsNet': invoice.reverse_charge,

src/pretix/base/exporters/invoices.py

@@ -20,7 +20,7 @@ class InvoiceExporter(BaseExporter):
     identifier = 'invoices'
     verbose_name = _('All invoices')
 
-    def render(self, form_data: dict):
+    def render(self, form_data: dict, output_file=None):
         qs = self.event.invoices.filter(shredded=False)
 
         if form_data.get('payment_provider'):
@@ -47,7 +47,7 @@ class InvoiceExporter(BaseExporter):
 
         with tempfile.TemporaryDirectory() as d:
             any = False
-            with ZipFile(os.path.join(d, 'tmp.zip'), 'w') as zipf:
+            with ZipFile(output_file or os.path.join(d, 'tmp.zip'), 'w') as zipf:
                 for i in qs:
                     try:
                         if not i.file:
@@ -68,8 +68,11 @@ class InvoiceExporter(BaseExporter):
             if not any:
                 return None
 
-            with open(os.path.join(d, 'tmp.zip'), 'rb') as zipf:
+            if output_file:
-                return '{}_invoices.zip'.format(self.event.slug), 'application/zip', zipf.read()
+                return '{}_invoices.zip'.format(self.event.slug), 'application/zip', None
+            else:
+                with open(os.path.join(d, 'tmp.zip'), 'rb') as zipf:
+                    return '{}_invoices.zip'.format(self.event.slug), 'application/zip', zipf.read()
 
     @property
     def export_form_fields(self):

src/pretix/base/exporters/orderlist.py

@@ -9,7 +9,7 @@ from django.utils.formats import date_format, localize
 from django.utils.translation import pgettext, ugettext as _, ugettext_lazy
 
 from pretix.base.models import (
-    InvoiceAddress, InvoiceLine, Order, OrderPosition,
+    InvoiceAddress, InvoiceLine, Order, OrderPosition, Question,
 )
 from pretix.base.models.orders import OrderFee, OrderPayment, OrderRefund
 from pretix.base.settings import PERSON_NAME_SCHEMES
@@ -96,7 +96,7 @@ class OrderListExporter(MultiSheetListExporter):
             for k, label, w in name_scheme['fields']:
                 headers.append(label)
         headers += [
-            _('Address'), _('ZIP code'), _('City'), _('Country'), _('VAT ID'),
+            _('Address'), _('ZIP code'), _('City'), _('Country'), pgettext('address', 'State'), _('VAT ID'),
             _('Date of last payment'), _('Fees'), _('Order locale')
         ]
 
@@ -109,6 +109,8 @@ class OrderListExporter(MultiSheetListExporter):
 
         headers.append(_('Invoice numbers'))
         headers.append(_('Sales channel'))
+        headers.append(_('Requires special attention'))
+        headers.append(_('Comment'))
 
         yield headers
 
@@ -153,10 +155,11 @@ class OrderListExporter(MultiSheetListExporter):
                     order.invoice_address.city,
                     order.invoice_address.country if order.invoice_address.country else
                     order.invoice_address.country_old,
+                    order.invoice_address.state,
                     order.invoice_address.vat_id,
                 ]
             except InvoiceAddress.DoesNotExist:
-                row += [''] * (7 + (len(name_scheme['fields']) if len(name_scheme['fields']) > 1 else 0))
+                row += [''] * (8 + (len(name_scheme['fields']) if len(name_scheme['fields']) > 1 else 0))
 
             row += [
                 order.payment_date.astimezone(tz).strftime('%Y-%m-%d') if order.payment_date else '',
@@ -178,6 +181,8 @@ class OrderListExporter(MultiSheetListExporter):
 
             row.append(', '.join([i.number for i in order.invoices.all()]))
             row.append(order.sales_channel)
+            row.append(_('Yes') if order.checkin_attention else _('No'))
+            row.append(order.comment or "")
             yield row
 
     def iterate_fees(self, form_data: dict):
@@ -208,7 +213,7 @@ class OrderListExporter(MultiSheetListExporter):
             for k, label, w in name_scheme['fields']:
                 headers.append(_('Invoice address name') + ': ' + str(label))
         headers += [
-            _('Address'), _('ZIP code'), _('City'), _('Country'), _('VAT ID'),
+            _('Address'), _('ZIP code'), _('City'), _('Country'), pgettext('address', 'State'), _('VAT ID'),
         ]
 
         yield headers
@@ -243,10 +248,11 @@ class OrderListExporter(MultiSheetListExporter):
                     order.invoice_address.city,
                     order.invoice_address.country if order.invoice_address.country else
                     order.invoice_address.country_old,
+                    order.invoice_address.state,
                     order.invoice_address.vat_id,
                 ]
             except InvoiceAddress.DoesNotExist:
-                row += [''] * (7 + (len(name_scheme['fields']) if len(name_scheme['fields']) > 1 else 0))
+                row += [''] * (8 + (len(name_scheme['fields']) if len(name_scheme['fields']) > 1 else 0))
             yield row
 
     def iterate_positions(self, form_data: dict):
@@ -301,7 +307,7 @@ class OrderListExporter(MultiSheetListExporter):
             for k, label, w in name_scheme['fields']:
                 headers.append(_('Invoice address name') + ': ' + str(label))
         headers += [
-            _('Address'), _('ZIP code'), _('City'), _('Country'), _('VAT ID'),
+            _('Address'), _('ZIP code'), _('City'), _('Country'), pgettext('address', 'State'), _('VAT ID'),
         ]
         headers.append(_('Sales channel'))
 
@@ -339,7 +345,12 @@ class OrderListExporter(MultiSheetListExporter):
             ]
             acache = {}
             for a in op.answers.all():
-                acache[a.question_id] = str(a)
+                # We do not want to localize Date, Time and Datetime question answers, as those can lead
+                # to difficulties parsing the data (for example 2019-02-01 may become Février, 2019 01 in French).
+                if a.question.type in Question.UNLOCALIZED_TYPES:
+                    acache[a.question_id] = a.answer
+                else:
+                    acache[a.question_id] = str(a)
             for q in questions:
                 row.append(acache.get(q.pk, ''))
             try:
@@ -358,10 +369,11 @@ class OrderListExporter(MultiSheetListExporter):
                     order.invoice_address.city,
                     order.invoice_address.country if order.invoice_address.country else
                     order.invoice_address.country_old,
+                    order.invoice_address.state,
                     order.invoice_address.vat_id,
                 ]
             except InvoiceAddress.DoesNotExist:
-                row += [''] * (7 + (len(name_scheme['fields']) if len(name_scheme['fields']) > 1 else 0))
+                row += [''] * (8 + (len(name_scheme['fields']) if len(name_scheme['fields']) > 1 else 0))
             row.append(order.sales_channel)
             yield row
 
@@ -503,6 +515,7 @@ class InvoiceDataExporter(MultiSheetListExporter):
                 _('Invoice recipient:') + ' ' + _('ZIP code'),
                 _('Invoice recipient:') + ' ' + _('City'),
                 _('Invoice recipient:') + ' ' + _('Country'),
+                _('Invoice recipient:') + ' ' + pgettext('address', 'State'),
                 _('Invoice recipient:') + ' ' + _('VAT ID'),
                 _('Invoice recipient:') + ' ' + _('Beneficiary'),
                 _('Invoice recipient:') + ' ' + _('Internal reference'),
@@ -552,6 +565,7 @@ class InvoiceDataExporter(MultiSheetListExporter):
                     i.invoice_to_zipcode,
                     i.invoice_to_city,
                     i.invoice_to_country,
+                    i.invoice_to_state,
                     i.invoice_to_vat_id,
                     i.invoice_to_beneficiary,
                     i.internal_reference,
@@ -591,6 +605,7 @@ class InvoiceDataExporter(MultiSheetListExporter):
                 _('Invoice recipient:') + ' ' + _('ZIP code'),
                 _('Invoice recipient:') + ' ' + _('City'),
                 _('Invoice recipient:') + ' ' + _('Country'),
+                _('Invoice recipient:') + ' ' + pgettext('address', 'State'),
                 _('Invoice recipient:') + ' ' + _('VAT ID'),
                 _('Invoice recipient:') + ' ' + _('Beneficiary'),
                 _('Invoice recipient:') + ' ' + _('Internal reference'),
@@ -630,6 +645,7 @@ class InvoiceDataExporter(MultiSheetListExporter):
                     i.invoice_to_zipcode,
                     i.invoice_to_city,
                     i.invoice_to_country,
+                    i.invoice_to_state,
                     i.invoice_to_vat_id,
                     i.invoice_to_beneficiary,
                     i.internal_reference,

src/pretix/base/forms/auth.py

@@ -14,7 +14,7 @@ class LoginForm(forms.Form):
     Base class for authenticating users. Extend this to get a form that accepts
     username/password logins.
     """
-    email = forms.EmailField(label=_("E-mail"), max_length=254)
+    email = forms.EmailField(label=_("E-mail"), max_length=254, widget=forms.EmailInput(attrs={'autofocus': 'autofocus'}))
     password = forms.CharField(label=_("Password"), widget=forms.PasswordInput)
     keep_logged_in = forms.BooleanField(label=_("Keep me logged in"), required=False)
 

src/pretix/base/forms/questions.py

@@ -1,17 +1,24 @@
 import copy
+import json
 import logging
 from decimal import Decimal
+from urllib.error import HTTPError
 
 import dateutil.parser
+import pycountry
 import pytz
 import vat_moss.errors
 import vat_moss.id
 from django import forms
 from django.contrib import messages
 from django.core.exceptions import ValidationError
+from django.db.models import QuerySet
+from django.forms import Select
 from django.utils.html import escape
 from django.utils.safestring import mark_safe
-from django.utils.translation import get_language, ugettext_lazy as _
+from django.utils.translation import (
+    get_language, pgettext_lazy, ugettext_lazy as _,
+)
 from django_countries import countries
 from django_countries.fields import Country, CountryField
 
@@ -20,10 +27,14 @@ from pretix.base.forms.widgets import (
     TimePickerWidget, UploadedFileWidget,
 )
 from pretix.base.models import InvoiceAddress, Question, QuestionOption
-from pretix.base.models.tax import EU_COUNTRIES
+from pretix.base.models.tax import EU_COUNTRIES, cc_to_vat_prefix
-from pretix.base.settings import PERSON_NAME_SCHEMES
+from pretix.base.settings import (
+    COUNTRIES_WITH_STATE_IN_ADDRESS, PERSON_NAME_SCHEMES,
+    PERSON_NAME_TITLE_GROUPS,
+)
 from pretix.base.templatetags.rich_text import rich_text
 from pretix.control.forms import SplitDateTimeField
+from pretix.helpers.escapejson import escapejson_attr
 from pretix.helpers.i18n import get_format_without_seconds
 from pretix.presale.signals import question_form_fields
 
@@ -32,15 +43,27 @@ logger = logging.getLogger(__name__)
 
 class NamePartsWidget(forms.MultiWidget):
     widget = forms.TextInput
+    autofill_map = {
+        'given_name': 'given-name',
+        'family_name': 'family-name',
+        'middle_name': 'additional-name',
+        'title': 'honorific-prefix',
+        'full_name': 'name',
+        'calling_name': 'nickname',
+    }
 
-    def __init__(self, scheme: dict, field: forms.Field, attrs=None):
+    def __init__(self, scheme: dict, field: forms.Field, attrs=None, titles: list=None):
         widgets = []
         self.scheme = scheme
         self.field = field
+        self.titles = titles
         for fname, label, size in self.scheme['fields']:
             a = copy.copy(attrs) or {}
             a['data-fname'] = fname
-            widgets.append(self.widget(attrs=a))
+            if fname == 'title' and self.titles:
+                widgets.append(Select(attrs=a, choices=[('', '')] + [(d, d) for d in self.titles[1]]))
+            else:
+                widgets.append(self.widget(attrs=a))
         super().__init__(widgets, attrs)
 
     def decompress(self, value):
@@ -74,6 +97,7 @@ class NamePartsWidget(forms.MultiWidget):
                     title=self.scheme['fields'][i][1],
                     placeholder=self.scheme['fields'][i][1],
                 )
+                final_attrs['autocomplete'] = (self.attrs.get('autocomplete', '') + ' ' + self.autofill_map.get(self.scheme['fields'][i][0], 'off')).strip()
                 final_attrs['data-size'] = self.scheme['fields'][i][2]
             output.append(widget.render(name + '_%s' % i, widget_value, final_attrs, renderer=renderer))
         return mark_safe(self.format_output(output))
@@ -99,19 +123,34 @@ class NamePartsFormField(forms.MultiValueField):
             'max_length': kwargs.pop('max_length', None),
         }
         self.scheme_name = kwargs.pop('scheme')
+        self.titles = kwargs.pop('titles')
         self.scheme = PERSON_NAME_SCHEMES.get(self.scheme_name)
+        if self.titles:
+            self.scheme_titles = PERSON_NAME_TITLE_GROUPS.get(self.titles)
+        else:
+            self.scheme_titles = None
         self.one_required = kwargs.get('required', True)
         require_all_fields = kwargs.pop('require_all_fields', False)
         kwargs['required'] = False
         kwargs['widget'] = (kwargs.get('widget') or self.widget)(
-            scheme=self.scheme, field=self, **kwargs.pop('widget_kwargs', {})
+            scheme=self.scheme, titles=self.scheme_titles, field=self, **kwargs.pop('widget_kwargs', {})
         )
         defaults.update(**kwargs)
         for fname, label, size in self.scheme['fields']:
             defaults['label'] = label
-            field = forms.CharField(**defaults)
+            if fname == 'title' and self.scheme_titles:
-            field.part_name = fname
+                d = dict(defaults)
-            fields.append(field)
+                d.pop('max_length', None)
+                field = forms.ChoiceField(
+                    **d,
+                    choices=[('', '')] + [(d, d) for d in self.scheme_titles[1]]
+                )
+                field.part_name = fname
+                fields.append(field)
+            else:
+                field = forms.CharField(**defaults)
+                field.part_name = fname
+                fields.append(field)
         super().__init__(
             fields=fields, require_all_fields=False, *args, **kwargs
         )
@@ -156,6 +195,7 @@ class BaseQuestionsForm(forms.Form):
                 max_length=255,
                 required=event.settings.attendee_names_required,
                 scheme=event.settings.name_scheme,
+                titles=event.settings.name_scheme_titles,
                 label=_('Attendee name'),
                 initial=(cartpos.attendee_name_parts if cartpos else orderpos.attendee_name_parts),
             )
@@ -163,7 +203,12 @@ class BaseQuestionsForm(forms.Form):
             self.fields['attendee_email'] = forms.EmailField(
                 required=event.settings.attendee_emails_required,
                 label=_('Attendee email'),
-                initial=(cartpos.attendee_email if cartpos else orderpos.attendee_email)
+                initial=(cartpos.attendee_email if cartpos else orderpos.attendee_email),
+                widget=forms.EmailInput(
+                    attrs={
+                        'autocomplete': 'email'
+                    }
+                )
             )
 
         for q in questions:
@@ -277,7 +322,7 @@ class BaseQuestionsForm(forms.Form):
 
             if q.dependency_question_id:
                 field.widget.attrs['data-question-dependency'] = q.dependency_question_id
-                field.widget.attrs['data-question-dependency-value'] = q.dependency_value
+                field.widget.attrs['data-question-dependency-values'] = escapejson_attr(json.dumps(q.dependency_values))
                 if q.type != 'M':
                     field.widget.attrs['required'] = q.required and not self.all_optional
                     field._required = q.required and not self.all_optional
@@ -293,31 +338,33 @@ class BaseQuestionsForm(forms.Form):
                 self.fields[key] = value
                 value.initial = data.get('question_form_data', {}).get(key)
 
+        for k, v in self.fields.items():
+            if v.widget.attrs.get('autocomplete') or k == 'attendee_name_parts':
+                v.widget.attrs['autocomplete'] = 'section-{} '.format(self.prefix) + v.widget.attrs.get('autocomplete', '')
+
     def clean(self):
         d = super().clean()
 
         question_cache = {f.question.pk: f.question for f in self.fields.values() if getattr(f, 'question', None)}
 
-        def question_is_visible(parentid, qval):
+        def question_is_visible(parentid, qvals):
             parentq = question_cache[parentid]
-            if parentq.dependency_question_id and not question_is_visible(parentq.dependency_question_id, parentq.dependency_value):
+            if parentq.dependency_question_id and not question_is_visible(parentq.dependency_question_id, parentq.dependency_values):
                 return False
             if 'question_%d' % parentid not in d:
                 return False
             dval = d.get('question_%d' % parentid)
-            if qval == 'True':
+            return (
-                return dval
+                ('True' in qvals and dval)
-            elif qval == 'False':
+                or ('False' in qvals and not dval)
-                return not dval
+                or (isinstance(dval, QuestionOption) and dval.identifier in qvals)
-            elif isinstance(dval, QuestionOption):
+                or (isinstance(dval, (list, QuerySet)) and any(qval in [o.identifier for o in dval] for qval in qvals))
-                return dval.identifier == qval
+            )
-            else:
-                return qval in [o.identifier for o in dval]
 
         def question_is_required(q):
             return (
                 q.required and
-                (not q.dependency_question_id or question_is_visible(q.dependency_question_id, q.dependency_value))
+                (not q.dependency_question_id or question_is_visible(q.dependency_question_id, q.dependency_values))
             )
 
         if not self.all_optional:
@@ -333,13 +380,29 @@ class BaseInvoiceAddressForm(forms.ModelForm):
 
     class Meta:
         model = InvoiceAddress
-        fields = ('is_business', 'company', 'name_parts', 'street', 'zipcode', 'city', 'country', 'vat_id',
+        fields = ('is_business', 'company', 'name_parts', 'street', 'zipcode', 'city', 'country', 'state',
-                  'internal_reference', 'beneficiary')
+                  'vat_id', 'internal_reference', 'beneficiary')
         widgets = {
             'is_business': BusinessBooleanRadio,
-            'street': forms.Textarea(attrs={'rows': 2, 'placeholder': _('Street and Number')}),
+            'street': forms.Textarea(attrs={
+                'rows': 2,
+                'placeholder': _('Street and Number'),
+                'autocomplete': 'street-address'
+            }),
             'beneficiary': forms.Textarea(attrs={'rows': 3}),
-            'company': forms.TextInput(attrs={'data-display-dependency': '#id_is_business_1'}),
+            'country': forms.Select(attrs={
+                'autocomplete': 'country',
+            }),
+            'zipcode': forms.TextInput(attrs={
+                'autocomplete': 'postal-code',
+            }),
+            'city': forms.TextInput(attrs={
+                'autocomplete': 'address-level2',
+            }),
+            'company': forms.TextInput(attrs={
+                'data-display-dependency': '#id_is_business_1',
+                'autocomplete': 'organization',
+            }),
             'vat_id': forms.TextInput(attrs={'data-display-dependency': '#id_is_business_1'}),
             'internal_reference': forms.TextInput,
         }
@@ -377,6 +440,33 @@ class BaseInvoiceAddressForm(forms.ModelForm):
         if not event.settings.invoice_address_vatid:
             del self.fields['vat_id']
 
+        c = [('', pgettext_lazy('address', 'Select state'))]
+        fprefix = self.prefix + '-' if self.prefix else ''
+        cc = None
+        if fprefix + 'country' in self.data:
+            cc = str(self.data[fprefix + 'country'])
+        elif 'country' in self.initial:
+            cc = str(self.initial['country'])
+        elif self.instance and self.instance.country:
+            cc = str(self.instance.country)
+        if cc and cc in COUNTRIES_WITH_STATE_IN_ADDRESS:
+            types, form = COUNTRIES_WITH_STATE_IN_ADDRESS[cc]
+            statelist = [s for s in pycountry.subdivisions.get(country_code=cc) if s.type in types]
+            c += sorted([(s.code[3:], s.name) for s in statelist], key=lambda s: s[1])
+        elif fprefix + 'state' in self.data:
+            self.data = self.data.copy()
+            del self.data[fprefix + 'state']
+
+        self.fields['state'] = forms.ChoiceField(
+            label=pgettext_lazy('address', 'State'),
+            required=False,
+            choices=c,
+            widget=forms.Select(attrs={
+                'autocomplete': 'address-level1',
+            }),
+        )
+        self.fields['state'].widget.is_required = True
+
         if not event.settings.invoice_address_required or self.all_optional:
             for k, f in self.fields.items():
                 f.required = False
@@ -398,6 +488,7 @@ class BaseInvoiceAddressForm(forms.ModelForm):
             max_length=255,
             required=event.settings.invoice_name_required and not self.all_optional,
             scheme=event.settings.name_scheme,
+            titles=event.settings.name_scheme_titles,
             label=_('Name'),
             initial=(self.instance.name_parts if self.instance else self.instance.name_parts),
         )
@@ -409,6 +500,10 @@ class BaseInvoiceAddressForm(forms.ModelForm):
         if not event.settings.invoice_address_beneficiary:
             del self.fields['beneficiary']
 
+        for k, v in self.fields.items():
+            if v.widget.attrs.get('autocomplete') or k == 'name_parts':
+                v.widget.attrs['autocomplete'] = 'section-invoice billing ' + v.widget.attrs.get('autocomplete', '')
+
     def clean(self):
         data = self.cleaned_data
         if not data.get('is_business'):
@@ -422,6 +517,10 @@ class BaseInvoiceAddressForm(forms.ModelForm):
         if 'vat_id' in self.changed_data or not data.get('vat_id'):
             self.instance.vat_id_validated = False
 
+        if data.get('city') and data.get('country') and str(data['country']) in COUNTRIES_WITH_STATE_IN_ADDRESS:
+            if not data.get('state'):
+                self.add_error('state', _('This field is required.'))
+
         self.instance.name_parts = data.get('name_parts')
 
         if all(
@@ -433,7 +532,7 @@ class BaseInvoiceAddressForm(forms.ModelForm):
         if self.validate_vat_id and self.instance.vat_id_validated and 'vat_id' not in self.changed_data:
             pass
         elif self.validate_vat_id and data.get('is_business') and data.get('country') in EU_COUNTRIES and data.get('vat_id'):
-            if data.get('vat_id')[:2] != str(data.get('country')):
+            if data.get('vat_id')[:2] != cc_to_vat_prefix(str(data.get('country'))):
                 raise ValidationError(_('Your VAT ID does not match the selected country.'))
             try:
                 result = vat_moss.id.validate(data.get('vat_id'))
@@ -451,7 +550,7 @@ class BaseInvoiceAddressForm(forms.ModelForm):
                                                      'your country is currently not available. We will therefore '
                                                      'need to charge VAT on your invoice. You can get the tax amount '
                                                      'back via the VAT reimbursement process.'))
-            except vat_moss.errors.WebServiceError:
+            except (vat_moss.errors.WebServiceError, HTTPError):
                 logger.exception('VAT ID checking failed for country {}'.format(data.get('country')))
                 self.instance.vat_id_validated = False
                 if self.request and self.vat_warning:
@@ -464,9 +563,8 @@ class BaseInvoiceAddressForm(forms.ModelForm):
 
 
 class BaseInvoiceNameForm(BaseInvoiceAddressForm):
-
     def __init__(self, *args, **kwargs):
         super().__init__(*args, **kwargs)
         for f in list(self.fields.keys()):
-            if f != 'name':
+            if f != 'name_parts':
                 del self.fields[f]

src/pretix/base/forms/user.py

@@ -115,5 +115,5 @@ class User2FADeviceAddForm(forms.Form):
     name = forms.CharField(label=_('Device name'), max_length=64)
     devicetype = forms.ChoiceField(label=_('Device type'), widget=forms.RadioSelect, choices=(
         ('totp', _('Smartphone with the Authenticator application')),
-        ('u2f', _('U2F-compatible hardware token (e.g. Yubikey)')),
+        ('webauthn', _('WebAuthn-compatible hardware token (e.g. Yubikey)')),
     ))

src/pretix/base/forms/validators.py

@@ -26,7 +26,7 @@ class PlaceholderValidator(BaseValidator):
         if value.count('{') != value.count('}'):
             raise ValidationError(
                 _('Invalid placeholder syntax: You used a different number of "{" than of "}".'),
-                code='invalid',
+                code='invalid_placeholder_syntax',
             )
 
         data_placeholders = list(re.findall(r'({[^}]*})', value, re.X))
@@ -37,7 +37,7 @@ class PlaceholderValidator(BaseValidator):
         if invalid_placeholders:
             raise ValidationError(
                 _('Invalid placeholder(s): %(value)s'),
-                code='invalid',
+                code='invalid_placeholders',
                 params={'value': ", ".join(invalid_placeholders,)})
 
     def clean(self, x):

src/pretix/base/management/commands/export.py

@@ -0,0 +1,58 @@
+import json
+import sys
+
+from django.core.management.base import BaseCommand
+from django.utils.timezone import override
+from django_scopes import scope
+
+from pretix.base.i18n import language
+from pretix.base.models import Event, Organizer
+from pretix.base.signals import register_data_exporters
+
+
+class Command(BaseCommand):
+    help = "Run an exporter to get data out of pretix"
+
+    def add_arguments(self, parser):
+        parser.add_argument('organizer_slug', nargs=1, type=str)
+        parser.add_argument('event_slug', nargs=1, type=str)
+        parser.add_argument('export_provider', nargs=1, type=str)
+        parser.add_argument('output_file', nargs=1, type=str)
+        parser.add_argument('--parameters', action='store', type=str, help='JSON-formatted parameters')
+
+    def handle(self, *args, **options):
+        try:
+            o = Organizer.objects.get(slug=options['organizer_slug'][0])
+        except Organizer.DoesNotExist:
+            self.stderr.write(self.style.ERROR('Organizer not found.'))
+            sys.exit(1)
+
+        with scope(organizer=o):
+            try:
+                e = o.events.get(slug=options['event_slug'][0])
+            except Event.DoesNotExist:
+                self.stderr.write(self.style.ERROR('Event not found.'))
+                sys.exit(1)
+
+            with language(e.settings.locale), override(e.settings.timezone):
+                responses = register_data_exporters.send(e)
+                for receiver, response in responses:
+                    ex = response(e)
+                    if ex.identifier == options['export_provider'][0]:
+                        params = json.loads(options.get('parameters') or '{}')
+                        with open(options['output_file'][0], 'wb') as f:
+                            try:
+                                ex.render(form_data=params, output_file=f)
+                            except TypeError:
+                                self.stderr.write(self.style.WARNING(
+                                    'Provider does not support direct file writing, need to buffer export in memory.'))
+                                d = ex.render(form_data=params)
+                                if d is None:
+                                    self.stderr.write(self.style.ERROR('Empty export.'))
+                                    sys.exit(2)
+                                f.write(d[2])
+
+                            sys.exit(0)
+
+            self.stderr.write(self.style.ERROR('Export provider not found.'))
+            sys.exit(1)

src/pretix/base/management/commands/migrate.py

@@ -2,7 +2,7 @@
 Django tries to be helpful by suggesting to run "makemigrations" in red font on every "migrate"
 run when there are things we have no migrations for. Usually, this is intended, and running
 "makemigrations" can really screw up the environment of a user, so we want to prevent novice
-users from doing that by going really dirty and fitlering it from the output.
+users from doing that by going really dirty and filtering it from the output.
 """
 import sys
 

src/pretix/base/management/commands/runperiodic.py

@@ -1,3 +1,4 @@
+from django.conf import settings
 from django.core.management import call_command
 from django.core.management.base import BaseCommand
 
@@ -8,5 +9,12 @@ class Command(BaseCommand):
     help = "Run periodic tasks"
 
     def handle(self, *args, **options):
-        periodic_task.send(self)
+        for recv, resp in periodic_task.send_robust(self):
+            if isinstance(resp, Exception):
+                if settings.SENTRY_ENABLED:
+                    from sentry_sdk import capture_exception
+                    capture_exception(resp)
+                else:
+                    raise resp
+
         call_command('clearsessions')

src/pretix/base/management/commands/shell_scoped.py

@@ -0,0 +1,39 @@
+import sys
+
+from django.apps import apps
+from django.core.management import call_command
+from django.core.management.base import BaseCommand
+from django_scopes import scope, scopes_disabled
+
+
+class Command(BaseCommand):
+    def create_parser(self, *args, **kwargs):
+        parser = super().create_parser(*args, **kwargs)
+        parser.parse_args = lambda x: parser.parse_known_args(x)[0]
+        return parser
+
+    def handle(self, *args, **options):
+        parser = self.create_parser(sys.argv[0], sys.argv[1])
+        flags = parser.parse_known_args(sys.argv[2:])[1]
+        if "--override" in flags:
+            with scopes_disabled():
+                return call_command("shell_plus", *args, **options)
+
+        lookups = {}
+        for flag in flags:
+            lookup, value = flag.lstrip("-").split("=")
+            lookup = lookup.split("__", maxsplit=1)
+            lookups[lookup[0]] = {
+                lookup[1] if len(lookup) > 1 else "pk": value
+            }
+        models = {
+            model_name.split(".")[-1]: model_class
+            for app_name, app_content in apps.all_models.items()
+            for (model_name, model_class) in app_content.items()
+        }
+        scope_options = {
+            app_name: models[app_name].objects.get(**app_value)
+            for app_name, app_value in lookups.items()
+        }
+        with scope(**scope_options):
+            return call_command("shell_plus", *args, **options)

src/pretix/base/migrations/0123_auto_20190530_1035.py

@@ -0,0 +1,70 @@
+# Generated by Django 2.2.1 on 2019-05-30 10:35
+
+import django.db.models.deletion
+from django.db import migrations, models
+
+import pretix.base.models.base
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('pretixbase', '0122_orderposition_web_secret'),
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name='SeatingPlan',
+            fields=[
+                ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False)),
+                ('name', models.CharField(max_length=190)),
+                ('layout', models.TextField()),
+                ('organizer', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, related_name='seating_plans', to='pretixbase.Organizer')),
+            ],
+            options={
+                'abstract': False,
+            },
+            bases=(models.Model, pretix.base.models.base.LoggingMixin),
+        ),
+        migrations.CreateModel(
+            name='SeatCategoryMapping',
+            fields=[
+                ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False)),
+                ('layout_category', models.CharField(max_length=190)),
+                ('event', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, related_name='seat_category_mappings', to='pretixbase.Event')),
+                ('product', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, related_name='seat_category_mappings', to='pretixbase.Item')),
+                ('subevent', models.ForeignKey(null=True, on_delete=django.db.models.deletion.CASCADE, related_name='seat_category_mappings', to='pretixbase.SubEvent')),
+            ],
+        ),
+        migrations.CreateModel(
+            name='Seat',
+            fields=[
+                ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False)),
+                ('name', models.CharField(max_length=190)),
+                ('blocked', models.BooleanField(default=False)),
+                ('event', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, related_name='seats', to='pretixbase.Event')),
+                ('product', models.ForeignKey(null=True, on_delete=django.db.models.deletion.CASCADE, related_name='seats', to='pretixbase.Item')),
+                ('subevent', models.ForeignKey(null=True, on_delete=django.db.models.deletion.CASCADE, related_name='seats', to='pretixbase.SubEvent')),
+            ],
+        ),
+        migrations.AddField(
+            model_name='cartposition',
+            name='seat',
+            field=models.ForeignKey(null=True, on_delete=django.db.models.deletion.PROTECT, to='pretixbase.Seat'),
+        ),
+        migrations.AddField(
+            model_name='event',
+            name='seating_plan',
+            field=models.ForeignKey(null=True, on_delete=django.db.models.deletion.PROTECT, related_name='events', to='pretixbase.SeatingPlan'),
+        ),
+        migrations.AddField(
+            model_name='orderposition',
+            name='seat',
+            field=models.ForeignKey(null=True, on_delete=django.db.models.deletion.PROTECT, to='pretixbase.Seat'),
+        ),
+        migrations.AddField(
+            model_name='subevent',
+            name='seating_plan',
+            field=models.ForeignKey(null=True, on_delete=django.db.models.deletion.PROTECT, related_name='subevents', to='pretixbase.SeatingPlan'),
+        ),
+    ]

src/pretix/base/migrations/0124_seat_seat_guid.py

@@ -0,0 +1,19 @@
+# Generated by Django 2.2.1 on 2019-05-30 11:10
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('pretixbase', '0123_auto_20190530_1035'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='seat',
+            name='seat_guid',
+            field=models.CharField(db_index=True, default=None, max_length=190),
+            preserve_default=False,
+        ),
+    ]

src/pretix/base/migrations/0125_voucher_show_hidden_items.py

@@ -0,0 +1,26 @@
+# Generated by Django 2.2.1 on 2019-07-07 10:10
+
+from django.db import migrations, models
+
+
+def set_show_hidden_items(apps, schema_editor):
+    Voucher = apps.get_model('pretixbase', 'Voucher')
+    Voucher.objects.filter(quota__isnull=False).update(show_hidden_items=False)
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('pretixbase', '0124_seat_seat_guid'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='voucher',
+            name='show_hidden_items',
+            field=models.BooleanField(default=True),
+        ),
+        migrations.RunPython(
+            set_show_hidden_items,
+            migrations.RunPython.noop,
+        )
+    ]

src/pretix/base/migrations/0126_item_show_quota_left.py

@@ -0,0 +1,18 @@
+# Generated by Django 2.2.1 on 2019-07-10 13:45
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('pretixbase', '0125_voucher_show_hidden_items'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='item',
+            name='show_quota_left',
+            field=models.NullBooleanField(),
+        ),
+    ]

src/pretix/base/migrations/0127_auto_20190711_0705.py

@@ -0,0 +1,25 @@
+# Generated by Django 2.2.1 on 2019-07-11 07:05
+
+from django.db import migrations
+
+import pretix.base.models.fields
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('pretixbase', '0126_item_show_quota_left'),
+    ]
+
+    operations = [
+        migrations.RenameField(
+            model_name='question',
+            old_name='dependency_value',
+            new_name='dependency_values',
+        ),
+        migrations.AlterField(
+            model_name='question',
+            name='dependency_values',
+            field=pretix.base.models.fields.MultiStringField(default=['']),
+        ),
+    ]

src/pretix/base/migrations/0128_auto_20190715_1510.py

@@ -0,0 +1,26 @@
+# Generated by Django 2.2.1 on 2019-07-15 15:10
+
+import django.db.models.deletion
+from django.db import migrations, models
+
+import pretix.base.models.fields
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('pretixbase', '0127_auto_20190711_0705'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='quota',
+            name='close_when_sold_out',
+            field=models.BooleanField(default=False),
+        ),
+        migrations.AddField(
+            model_name='quota',
+            name='closed',
+            field=models.BooleanField(default=False),
+        ),
+    ]

src/pretix/base/migrations/0129_auto_20190724_1548.py

@@ -0,0 +1,21 @@
+# Generated by Django 2.2.1 on 2019-07-24 15:48
+
+import django.db.models.deletion
+from django.db import migrations, models
+
+import pretix.base.models.fields
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('pretixbase', '0128_auto_20190715_1510'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='item',
+            name='hidden_if_available',
+            field=models.ForeignKey(null=True, on_delete=django.db.models.deletion.SET_NULL, to='pretixbase.Quota'),
+        ),
+    ]

src/pretix/base/migrations/0130_auto_20190729_1311.py

@@ -0,0 +1,31 @@
+# Generated by Django 2.2.1 on 2019-07-29 13:11
+
+import django.db.models.deletion
+from django.db import migrations, models
+
+import pretix.base.models.fields
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('pretixbase', '0129_auto_20190724_1548'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='seat',
+            name='row_name',
+            field=models.CharField(default='', max_length=190),
+        ),
+        migrations.AddField(
+            model_name='seat',
+            name='seat_number',
+            field=models.CharField(default='', max_length=190),
+        ),
+        migrations.AddField(
+            model_name='seat',
+            name='zone_name',
+            field=models.CharField(default='', max_length=190),
+        ),
+    ]

src/pretix/base/migrations/0131_auto_20190729_1422.py

@@ -0,0 +1,21 @@
+# Generated by Django 2.2.1 on 2019-07-29 14:22
+
+import django.db.models.deletion
+from django.db import migrations, models
+
+import pretix.base.models.fields
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('pretixbase', '0130_auto_20190729_1311'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='item',
+            name='allow_waitinglist',
+            field=models.BooleanField(default=True),
+        ),
+    ]

src/pretix/base/migrations/0132_auto_20190808_1253.py

@@ -0,0 +1,27 @@
+# Generated by Django 2.2.1 on 2019-08-08 12:53
+
+import django.db.models.deletion
+from django.db import migrations, models
+
+import pretix.base.models.fields
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('pretixbase', '0131_auto_20190729_1422'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='invoice',
+            name='invoice_to_state',
+            field=models.CharField(max_length=190, null=True),
+        ),
+        migrations.AddField(
+            model_name='invoiceaddress',
+            name='state',
+            field=models.CharField(default='', max_length=255),
+            preserve_default=False,
+        ),
+    ]

src/pretix/base/migrations/0133_auto_20190830_1513.py

@@ -0,0 +1,21 @@
+# Generated by Django 2.2.4 on 2019-08-30 15:13
+
+import django.db.models.deletion
+from django.db import migrations, models
+
+import pretix.base.models.fields
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('pretixbase', '0132_auto_20190808_1253'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='question',
+            name='print_on_invoice',
+            field=models.BooleanField(default=False),
+        ),
+    ]

src/pretix/base/migrations/0134_auto_20190909_1042.py

@@ -0,0 +1,35 @@
+# Generated by Django 2.2.4 on 2019-09-09 10:42
+
+import django.db.models.deletion
+from django.conf import settings
+from django.db import migrations, models
+
+import pretix.base.models.fields
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('pretixbase', '0133_auto_20190830_1513'),
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name='WebAuthnDevice',
+            fields=[
+                ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False)),
+                ('name', models.CharField(max_length=64)),
+                ('confirmed', models.BooleanField(default=True)),
+                ('credential_id', models.CharField(max_length=255, null=True)),
+                ('rp_id', models.CharField(max_length=255, null=True)),
+                ('icon_url', models.CharField(max_length=255, null=True)),
+                ('ukey', models.TextField(null=True)),
+                ('pub_key', models.TextField(null=True)),
+                ('sign_count', models.IntegerField(default=0)),
+                ('user', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, to=settings.AUTH_USER_MODEL)),
+            ],
+            options={
+                'abstract': False,
+            },
+        ),
+    ]

src/pretix/base/migrations/0135_auto_20191007_0803.py

@@ -0,0 +1,27 @@
+# Generated by Django 2.2.4 on 2019-10-07 08:03
+from django.core.cache import cache
+from django.db import migrations
+
+
+def mail_migrator(app, schema_editor):
+    Event_SettingsStore = app.get_model('pretixbase', 'Event_SettingsStore')
+
+    for ss in Event_SettingsStore.objects.filter(
+        key__in=['mail_text_order_approved', 'mail_text_order_placed', 'mail_text_order_placed_require_approval']
+    ):
+        chgd = ss.value.replace("{date}", "{expire_date}")
+        if chgd != ss.value:
+            ss.value = chgd
+            ss.save()
+            cache.delete('hierarkey_{}_{}'.format('event', ss.object_id))
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('pretixbase', '0134_auto_20190909_1042'),
+    ]
+
+    operations = [
+        migrations.RunPython(mail_migrator, migrations.RunPython.noop)
+    ]

src/pretix/base/migrations/0136_auto_20190918_1742.py

@@ -0,0 +1,25 @@
+# Generated by Django 2.2 on 2019-09-18 17:42
+
+from django.db import migrations, models
+
+import pretix.base.models.fields
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('pretixbase', '0135_auto_20191007_0803'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='checkin',
+            name='auto_checked_in',
+            field=models.BooleanField(default=False),
+        ),
+        migrations.AddField(
+            model_name='checkinlist',
+            name='auto_checkin_sales_channels',
+            field=pretix.base.models.fields.MultiStringField(default=[]),
+        )
+    ]

src/pretix/base/models/__init__.py

@@ -1,5 +1,5 @@
 from ..settings import GlobalSettingsObject_SettingsStore
-from .auth import U2FDevice, User
+from .auth import U2FDevice, User, WebAuthnDevice
 from .base import CachedFile, LoggedModel, cachedfile_name
 from .checkin import Checkin, CheckinList
 from .devices import Device
@@ -24,6 +24,7 @@ from .orders import (
 from .organizer import (
     Organizer, Organizer_SettingsStore, Team, TeamAPIToken, TeamInvite,
 )
+from .seating import Seat, SeatCategoryMapping, SeatingPlan
 from .tax import TaxRule
 from .vouchers import Voucher
 from .waitinglist import WaitingListEntry

src/pretix/base/models/auth.py

@@ -1,5 +1,9 @@
+import binascii
+import json
 from datetime import timedelta
+from urllib.parse import urlparse
 
+import webauthn
 from django.conf import settings
 from django.contrib.auth.models import (
     AbstractBaseUser, BaseUserManager, PermissionsMixin,
@@ -12,6 +16,10 @@ from django.utils.crypto import get_random_string
 from django.utils.timezone import now
 from django.utils.translation import ugettext_lazy as _
 from django_otp.models import Device
+from django_scopes import scopes_disabled
+from u2flib_server.utils import (
+    pub_key_from_der, websafe_decode, websafe_encode,
+)
 
 from pretix.base.i18n import language
 from pretix.helpers.urls import build_absolute_uri
@@ -175,6 +183,7 @@ class User(AbstractBaseUser, PermissionsMixin, LoggingMixin):
                     'url': build_absolute_uri('control:user.settings')
                 },
                 event=None,
+                user=self,
                 locale=self.locale
             )
         except SendMailException:
@@ -190,9 +199,13 @@ class User(AbstractBaseUser, PermissionsMixin, LoggingMixin):
                 'url': (build_absolute_uri('control:auth.forgot.recover')
                         + '?id=%d&token=%s' % (self.id, default_token_generator.make_token(self)))
             },
-            None, locale=self.locale
+            None, locale=self.locale, user=self
         )
 
+    @property
+    def top_logentries(self):
+        return self.all_logentries
+
     @property
     def all_logentries(self):
         from pretix.base.models import LogEntry
@@ -283,6 +296,7 @@ class User(AbstractBaseUser, PermissionsMixin, LoggingMixin):
                 return True
         return False
 
+    @scopes_disabled()
     def get_events_with_any_permission(self, request=None):
         """
         Returns a queryset of events the user has any permissions to.
@@ -300,6 +314,7 @@ class User(AbstractBaseUser, PermissionsMixin, LoggingMixin):
             | Q(id__in=self.teams.values_list('limit_events__id', flat=True))
         )
 
+    @scopes_disabled()
     def get_events_with_permission(self, permission, request=None):
         """
         Returns a queryset of events the user has a specific permissions to.
@@ -372,3 +387,49 @@ class StaffSessionAuditLog(models.Model):
 
 class U2FDevice(Device):
     json_data = models.TextField()
+
+    @property
+    def webauthnuser(self):
+        d = json.loads(self.json_data)
+        # We manually need to convert the pubkey from DER format (used in our
+        # former U2F implementation) to the format required by webauthn. This
+        # is based on the following example:
+        # https://www.w3.org/TR/webauthn/#sctn-encoded-credPubKey-examples
+        pub_key = pub_key_from_der(websafe_decode(d['publicKey'].replace('+', '-').replace('/', '_')))
+        pub_key = binascii.unhexlify(
+            'A5010203262001215820{:064x}225820{:064x}'.format(
+                pub_key.public_numbers().x, pub_key.public_numbers().y
+            )
+        )
+        return webauthn.WebAuthnUser(
+            d['keyHandle'],
+            self.user.email,
+            str(self.user),
+            settings.SITE_URL,
+            d['keyHandle'],
+            websafe_encode(pub_key),
+            1,
+            urlparse(settings.SITE_URL).netloc
+        )
+
+
+class WebAuthnDevice(Device):
+    credential_id = models.CharField(max_length=255, null=True, blank=True)
+    rp_id = models.CharField(max_length=255, null=True, blank=True)
+    icon_url = models.CharField(max_length=255, null=True, blank=True)
+    ukey = models.TextField(null=True)
+    pub_key = models.TextField(null=True)
+    sign_count = models.IntegerField(default=0)
+
+    @property
+    def webauthnuser(self):
+        return webauthn.WebAuthnUser(
+            self.ukey,
+            self.user.email,
+            str(self.user),
+            settings.SITE_URL,
+            self.credential_id,
+            self.pub_key,
+            self.sign_count,
+            urlparse(settings.SITE_URL).netloc
+        )

src/pretix/base/models/base.py

@@ -86,7 +86,7 @@ class LoggingMixin:
                     if (sensitivekey in k) and v:
                         data[k] = "********"
 
-            logentry.data = json.dumps(data, cls=CustomJSONEncoder)
+            logentry.data = json.dumps(data, cls=CustomJSONEncoder, sort_keys=True)
         elif data:
             raise TypeError("You should only supply dictionaries as log data.")
         if save:

src/pretix/base/models/checkin.py

@@ -1,10 +1,11 @@
 from django.db import models
-from django.db.models import Case, Count, F, OuterRef, Q, Subquery, When
+from django.db.models import Exists, OuterRef
-from django.db.models.functions import Coalesce
 from django.utils.timezone import now
 from django.utils.translation import pgettext_lazy, ugettext_lazy as _
+from django_scopes import ScopedManager
 
 from pretix.base.models import LoggedModel
+from pretix.base.models.fields import MultiStringField
 
 
 class CheckinList(LoggedModel):
@@ -17,140 +18,69 @@ class CheckinList(LoggedModel):
     include_pending = models.BooleanField(verbose_name=pgettext_lazy('checkin', 'Include pending orders'),
                                           default=False,
                                           help_text=_('With this option, people will be able to check in even if the '
-                                                      'order have not been paid. This only works with pretixdesk '
+                                                      'order have not been paid.'))
-                                                      '0.3.0 or newer or pretixdroid 1.9 or newer.'))
+
+    auto_checkin_sales_channels = MultiStringField(
+        default=[],
+        blank=True,
+        verbose_name=_('Sales channels to automatically check in'),
+        help_text=_('All items on this check-in list will be automatically marked as checked-in when purchased through '
+                    'any of the selected sales channels. This option can be useful when tickets sold at the box office '
+                    'are not checked again before entry and should be considered validated directly upon purchase.')
+    )
+
+    objects = ScopedManager(organizer='event__organizer')
 
     class Meta:
         ordering = ('subevent__date_from', 'name')
 
+    @property
+    def positions(self):
+        from . import OrderPosition, Order
+
+        qs = OrderPosition.objects.filter(
+            order__event=self.event,
+            order__status__in=[Order.STATUS_PAID, Order.STATUS_PENDING] if self.include_pending else [Order.STATUS_PAID],
+            subevent=self.subevent
+        )
+        if not self.all_products:
+            qs = qs.filter(item__in=self.limit_products.values_list('id', flat=True))
+        return qs
+
+    @property
+    def checkin_count(self):
+        return self.event.cache.get_or_set(
+            'checkin_list_{}_checkin_count'.format(self.pk),
+            lambda: self.positions.annotate(
+                checkedin=Exists(Checkin.objects.filter(list_id=self.pk, position=OuterRef('pk')))
+            ).filter(
+                checkedin=True
+            ).count(),
+            60
+        )
+
+    @property
+    def percent(self):
+        pc = self.position_count
+        return round(self.checkin_count * 100 / pc) if pc else 0
+
+    @property
+    def position_count(self):
+        return self.event.cache.get_or_set(
+            'checkin_list_{}_position_count'.format(self.pk),
+            lambda: self.positions.count(),
+            60
+        )
+
+    def touch(self):
+        self.event.cache.delete('checkin_list_{}_position_count'.format(self.pk))
+        self.event.cache.delete('checkin_list_{}_checkin_count'.format(self.pk))
+
     @staticmethod
     def annotate_with_numbers(qs, event):
-        """
+        # This is only kept for backwards-compatibility reasons. This method used to precompute .position_count
-        Modifies a queryset of checkin lists by annotating it with the number of order positions and
+        # and .checkin_count through a huge subquery chain, but was dropped for performance reasons.
-        checkins associated with it.
+        return qs
-        """
-        # Import here to prevent circular import
-        from . import Order, OrderPosition, Item
-
-        # This is the mother of all subqueries. Sorry. I try to explain it, at least?
-        # First, we prepare a subquery that for every check-in that belongs to a paid-order
-        # position and to the list in question. Then, we check that it also belongs to the
-        # correct subevent (just to be sure) and aggregate over lists (so, over everything,
-        # since we filtered by lists).
-        cqs_paid = Checkin.objects.filter(
-            position__order__event=event,
-            position__order__status=Order.STATUS_PAID,
-            list=OuterRef('pk')
-        ).filter(
-            # This assumes that in an event with subevents, *all* positions have subevents
-            # and *all* checkin lists have a subevent assigned
-            Q(position__subevent=OuterRef('subevent'))
-            | (Q(position__subevent__isnull=True))
-        ).order_by().values('list').annotate(
-            c=Count('*')
-        ).values('c')
-        cqs_paid_and_pending = Checkin.objects.filter(
-            position__order__event=event,
-            position__order__status__in=[Order.STATUS_PAID, Order.STATUS_PENDING],
-            list=OuterRef('pk')
-        ).filter(
-            # This assumes that in an event with subevents, *all* positions have subevents
-            # and *all* checkin lists have a subevent assigned
-            Q(position__subevent=OuterRef('subevent'))
-            | (Q(position__subevent__isnull=True))
-        ).order_by().values('list').annotate(
-            c=Count('*')
-        ).values('c')
-
-        # Now for the hard part: getting all order positions that contribute to this list. This
-        # requires us to use TWO subqueries. The first one, pqs_all, will only be used for check-in
-        # lists that contain all the products of the event. This is the simpler one, it basically
-        # looks like the check-in counter above.
-        pqs_all_paid = OrderPosition.objects.filter(
-            order__event=event,
-            order__status=Order.STATUS_PAID,
-        ).filter(
-            # This assumes that in an event with subevents, *all* positions have subevents
-            # and *all* checkin lists have a subevent assigned
-            Q(subevent=OuterRef('subevent'))
-            | (Q(subevent__isnull=True))
-        ).order_by().values('order__event').annotate(
-            c=Count('*')
-        ).values('c')
-        pqs_all_paid_and_pending = OrderPosition.objects.filter(
-            order__event=event,
-            order__status__in=[Order.STATUS_PAID, Order.STATUS_PENDING]
-        ).filter(
-            # This assumes that in an event with subevents, *all* positions have subevents
-            # and *all* checkin lists have a subevent assigned
-            Q(subevent=OuterRef('subevent'))
-            | (Q(subevent__isnull=True))
-        ).order_by().values('order__event').annotate(
-            c=Count('*')
-        ).values('c')
-
-        # Now we need a subquery for the case of checkin lists that are limited to certain
-        # products. We cannot use OuterRef("limit_products") since that would do a cross-product
-        # with the products table and we'd get duplicate rows in the output with different annotations
-        # on them, which isn't useful at all. Therefore, we need to add a second layer of subqueries
-        # to retrieve all of those items and then check if the item_id is IN this subquery result.
-        pqs_limited_paid = OrderPosition.objects.filter(
-            order__event=event,
-            order__status=Order.STATUS_PAID,
-            item_id__in=Subquery(Item.objects.filter(checkinlist__pk=OuterRef(OuterRef('pk'))).values('pk'))
-        ).filter(
-            # This assumes that in an event with subevents, *all* positions have subevents
-            # and *all* checkin lists have a subevent assigned
-            Q(subevent=OuterRef('subevent'))
-            | (Q(subevent__isnull=True))
-        ).order_by().values('order__event').annotate(
-            c=Count('*')
-        ).values('c')
-        pqs_limited_paid_and_pending = OrderPosition.objects.filter(
-            order__event=event,
-            order__status__in=[Order.STATUS_PAID, Order.STATUS_PENDING],
-            item_id__in=Subquery(Item.objects.filter(checkinlist__pk=OuterRef(OuterRef('pk'))).values('pk'))
-        ).filter(
-            # This assumes that in an event with subevents, *all* positions have subevents
-            # and *all* checkin lists have a subevent assigned
-            Q(subevent=OuterRef('subevent'))
-            | (Q(subevent__isnull=True))
-        ).order_by().values('order__event').annotate(
-            c=Count('*')
-        ).values('c')
-
-        # Finally, we put all of this together. We force empty subquery aggregates to 0 by using Coalesce()
-        # and decide which subquery to use for this row. In the end, we compute an integer percentage in case
-        # we want to display a progress bar.
-        return qs.annotate(
-            checkin_count=Coalesce(
-                Case(
-                    When(include_pending=True, then=Subquery(cqs_paid_and_pending, output_field=models.IntegerField())),
-                    default=Subquery(cqs_paid, output_field=models.IntegerField()),
-                    output_field=models.IntegerField()
-                ),
-                0
-            ),
-            position_count=Coalesce(
-                Case(
-                    When(all_products=True, include_pending=False,
-                         then=Subquery(pqs_all_paid, output_field=models.IntegerField())),
-                    When(all_products=True, include_pending=True,
-                         then=Subquery(pqs_all_paid_and_pending, output_field=models.IntegerField())),
-                    When(all_products=False, include_pending=False,
-                         then=Subquery(pqs_limited_paid, output_field=models.IntegerField())),
-                    default=Subquery(pqs_limited_paid_and_pending, output_field=models.IntegerField()),
-                    output_field=models.IntegerField()
-                ),
-                0
-            )
-        ).annotate(
-            percent=Case(
-                When(position_count__gt=0, then=F('checkin_count') * 100 / F('position_count')),
-                default=0,
-                output_field=models.IntegerField()
-            )
-        )
 
     def __str__(self):
         return self.name
@@ -166,6 +96,9 @@ class Checkin(models.Model):
     list = models.ForeignKey(
         'pretixbase.CheckinList', related_name='checkins', on_delete=models.PROTECT,
     )
+    auto_checked_in = models.BooleanField(default=False)
+
+    objects = ScopedManager(organizer='position__order__event__organizer')
 
     class Meta:
         unique_together = (('list', 'position'),)
@@ -177,8 +110,11 @@ class Checkin(models.Model):
 
     def save(self, **kwargs):
         self.position.order.touch()
+        self.list.event.cache.delete('checkin_count')
+        self.list.touch()
         super().save(**kwargs)
 
     def delete(self, **kwargs):
         self.position.order.touch()
         super().delete(**kwargs)
+        self.list.touch()

src/pretix/base/models/devices.py

@@ -4,10 +4,12 @@ from django.db import models
 from django.db.models import Max
 from django.utils.crypto import get_random_string
 from django.utils.translation import ugettext_lazy as _
+from django_scopes import ScopedManager, scopes_disabled
 
 from pretix.base.models import LoggedModel
 
 
+@scopes_disabled()
 def generate_serial():
     serial = get_random_string(allowed_chars='ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789', length=16)
     while Device.objects.filter(unique_serial=serial).exists():
@@ -15,6 +17,7 @@ def generate_serial():
     return serial
 
 
+@scopes_disabled()
 def generate_initialization_token():
     token = get_random_string(length=16, allowed_chars=string.ascii_lowercase + string.digits)
     while Device.objects.filter(initialization_token=token).exists():
@@ -22,6 +25,7 @@ def generate_initialization_token():
     return token
 
 
+@scopes_disabled()
 def generate_api_token():
     token = get_random_string(length=64, allowed_chars=string.ascii_lowercase + string.digits)
     while Device.objects.filter(api_token=token).exists():
@@ -71,6 +75,8 @@ class Device(LoggedModel):
         null=True, blank=True
     )
 
+    objects = ScopedManager(organizer='organizer')
+
     class Meta:
         unique_together = (('organizer', 'device_id'),)
 

src/pretix/base/models/event.py

@@ -17,6 +17,7 @@ from django.utils.crypto import get_random_string
 from django.utils.functional import cached_property
 from django.utils.timezone import make_aware, now
 from django.utils.translation import ugettext_lazy as _
+from django_scopes import ScopedManager, scopes_disabled
 from i18nfield.fields import I18nCharField, I18nTextField
 
 from pretix.base.models.base import LoggedModel
@@ -64,7 +65,7 @@ class EventMixin:
             "SHORT_DATETIME_FORMAT" if self.settings.show_times else "DATE_FORMAT"
         )
 
-    def get_date_from_display(self, tz=None, show_times=True) -> str:
+    def get_date_from_display(self, tz=None, show_times=True, short=False) -> str:
         """
         Returns a formatted string containing the start date of the event with respect
         to the current locale and to the ``show_times`` setting.
@@ -72,7 +73,7 @@ class EventMixin:
         tz = tz or self.timezone
         return _date(
             self.date_from.astimezone(tz),
-            "DATETIME_FORMAT" if self.settings.show_times and show_times else "DATE_FORMAT"
+            ("SHORT_" if short else "") + ("DATETIME_FORMAT" if self.settings.show_times and show_times else "DATE_FORMAT")
         )
 
     def get_time_from_display(self, tz=None) -> str:
@@ -85,7 +86,7 @@ class EventMixin:
             self.date_from.astimezone(tz), "TIME_FORMAT"
         )
 
-    def get_date_to_display(self, tz=None) -> str:
+    def get_date_to_display(self, tz=None, short=False) -> str:
         """
         Returns a formatted string containing the start date of the event with respect
         to the current locale and to the ``show_times`` setting. Returns an empty string
@@ -96,17 +97,17 @@ class EventMixin:
             return ""
         return _date(
             self.date_to.astimezone(tz),
-            "DATETIME_FORMAT" if self.settings.show_times else "DATE_FORMAT"
+            ("SHORT_" if short else "") + ("DATETIME_FORMAT" if self.settings.show_times else "DATE_FORMAT")
         )
 
-    def get_date_range_display(self, tz=None) -> str:
+    def get_date_range_display(self, tz=None, force_show_end=False) -> str:
         """
         Returns a formatted string containing the start date and the end date
         of the event with respect to the current locale and to the ``show_times`` and
         ``show_date_to`` settings.
         """
         tz = tz or self.timezone
-        if not self.settings.show_date_to or not self.date_to:
+        if (not self.settings.show_date_to and not force_show_end) or not self.date_to:
             return _date(self.date_from.astimezone(tz), "DATE_FORMAT")
         return daterange(self.date_from.astimezone(tz), self.date_to.astimezone(tz))
 
@@ -335,6 +336,10 @@ class Event(EventMixin, LoggedModel):
         verbose_name=_('Event series'),
         default=False
     )
+    seating_plan = models.ForeignKey('SeatingPlan', on_delete=models.PROTECT, null=True, blank=True,
+                                     related_name='events')
+
+    objects = ScopedManager(organizer='organizer')
 
     class Meta:
         verbose_name = _("Event")
@@ -345,6 +350,26 @@ class Event(EventMixin, LoggedModel):
     def __str__(self):
         return str(self.name)
 
+    @property
+    def free_seats(self):
+        from .orders import CartPosition, Order, OrderPosition
+        return self.seats.annotate(
+            has_order=Exists(
+                OrderPosition.objects.filter(
+                    order__event=self,
+                    seat_id=OuterRef('pk'),
+                    order__status__in=[Order.STATUS_PENDING, Order.STATUS_PAID]
+                )
+            ),
+            has_cart=Exists(
+                CartPosition.objects.filter(
+                    event=self,
+                    seat_id=OuterRef('pk'),
+                    expires__gte=now()
+                )
+            )
+        ).filter(has_order=False, has_cart=False, blocked=False)
+
     @property
     def presale_has_ended(self):
         if self.has_subevents:
@@ -491,14 +516,21 @@ class Event(EventMixin, LoggedModel):
         for q in Quota.objects.filter(event=other, subevent__isnull=True).prefetch_related('items', 'variations'):
             items = list(q.items.all())
             vars = list(q.variations.all())
+            oldid = q.pk
             q.pk = None
             q.event = self
+            q.cached_availability_state = None
+            q.cached_availability_number = None
+            q.cached_availability_paid_orders = None
+            q.cached_availability_time = None
+            q.closed = False
             q.save()
             for i in items:
                 if i.pk in item_map:
                     q.items.add(item_map[i.pk])
             for v in vars:
                 q.variations.add(variation_map[v.pk])
+            self.items.filter(hidden_if_available_id=oldid).update(hidden_if_available=q)
 
         question_map = {}
         for q in Question.objects.filter(event=other).prefetch_related('items', 'options'):
@@ -528,6 +560,24 @@ class Event(EventMixin, LoggedModel):
             for i in items:
                 cl.limit_products.add(item_map[i.pk])
 
+        if other.seating_plan:
+            if other.seating_plan.organizer_id == self.organizer_id:
+                self.seating_plan = other.seating_plan
+            else:
+                self.organizer.seating_plans.create(name=other.seating_plan.name, layout=other.seating_plan.layout)
+            self.save()
+
+        for m in other.seat_category_mappings.filter(subevent__isnull=True):
+            m.pk = None
+            m.event = self
+            m.product = item_map[m.product_id]
+            m.save()
+
+        for s in other.seats.filter(subevent__isnull=True):
+            s.pk = None
+            s.event = self
+            s.save()
+
         for s in other.settings._objects.all():
             s.object = self
             s.pk = None
@@ -558,22 +608,24 @@ class Event(EventMixin, LoggedModel):
             question_map=question_map
         )
 
-    def get_payment_providers(self) -> dict:
+    def get_payment_providers(self, cached=False) -> dict:
         """
         Returns a dictionary of initialized payment providers mapped by their identifiers.
         """
         from ..signals import register_payment_providers
 
-        responses = register_payment_providers.send(self)
+        if not cached or not hasattr(self, '_cached_payment_providers'):
-        providers = {}
+            responses = register_payment_providers.send(self)
-        for receiver, response in responses:
+            providers = {}
-            if not isinstance(response, list):
+            for receiver, response in responses:
-                response = [response]
+                if not isinstance(response, list):
-            for p in response:
+                    response = [response]
-                pp = p(self)
+                for p in response:
-                providers[pp.identifier] = pp
+                    pp = p(self)
+                    providers[pp.identifier] = pp
 
-        return OrderedDict(sorted(providers.items(), key=lambda v: str(v[1].verbose_name)))
+            self._cached_payment_providers = OrderedDict(sorted(providers.items(), key=lambda v: str(v[1].verbose_name)))
+        return self._cached_payment_providers
 
     def get_html_mail_renderer(self):
         """
@@ -667,8 +719,12 @@ class Event(EventMixin, LoggedModel):
     @property
     def meta_data(self):
         data = {p.name: p.default for p in self.organizer.meta_properties.all()}
-        data.update({v.property.name: v.value for v in self.meta_values.select_related('property').all()})
+        if hasattr(self, 'meta_values_cached'):
-        return data
+            data.update({v.property.name: v.value for v in self.meta_values_cached})
+        else:
+            data.update({v.property.name: v.value for v in self.meta_values.select_related('property').all()})
+
+        return OrderedDict((k, v) for k, v in sorted(data.items(), key=lambda k: k[0]))
 
     @property
     def has_payment_provider(self):
@@ -770,18 +826,24 @@ class Event(EventMixin, LoggedModel):
 
     def enable_plugin(self, module, allow_restricted=False):
         plugins_active = self.get_plugins()
+        from pretix.presale.style import regenerate_css
 
         if module not in plugins_active:
             plugins_active.append(module)
             self.set_active_plugins(plugins_active, allow_restricted=allow_restricted)
 
+        regenerate_css.apply_async(args=(self.pk,))
+
     def disable_plugin(self, module):
         plugins_active = self.get_plugins()
+        from pretix.presale.style import regenerate_css
 
         if module in plugins_active:
             plugins_active.remove(module)
             self.set_active_plugins(plugins_active)
 
+        regenerate_css.apply_async(args=(self.pk,))
+
     @staticmethod
     def clean_has_subevents(event, has_subevents):
         if event is not None and event.has_subevents is not None:
@@ -871,10 +933,14 @@ class SubEvent(EventMixin, LoggedModel):
         null=True, blank=True,
         verbose_name=_("Frontpage text")
     )
+    seating_plan = models.ForeignKey('SeatingPlan', on_delete=models.PROTECT, null=True, blank=True,
+                                     related_name='subevents')
 
     items = models.ManyToManyField('Item', through='SubEventItem')
     variations = models.ManyToManyField('ItemVariation', through='SubEventItemVariation')
 
+    objects = ScopedManager(organizer='event__organizer')
+
     class Meta:
         verbose_name = _("Date in event series")
         verbose_name_plural = _("Dates in event series")
@@ -883,6 +949,28 @@ class SubEvent(EventMixin, LoggedModel):
     def __str__(self):
         return '{} - {}'.format(self.name, self.get_date_range_display())
 
+    @property
+    def free_seats(self):
+        from .orders import CartPosition, Order, OrderPosition
+        return self.seats.annotate(
+            has_order=Exists(
+                OrderPosition.objects.filter(
+                    order__event_id=self.event_id,
+                    subevent=self,
+                    seat_id=OuterRef('pk'),
+                    order__status__in=[Order.STATUS_PENDING, Order.STATUS_PAID]
+                )
+            ),
+            has_cart=Exists(
+                CartPosition.objects.filter(
+                    event_id=self.event_id,
+                    subevent=self,
+                    seat_id=OuterRef('pk'),
+                    expires__gte=now()
+                )
+            )
+        ).filter(has_order=False, has_cart=False, blocked=False)
+
     @cached_property
     def settings(self):
         return self.event.settings
@@ -941,6 +1029,7 @@ class SubEvent(EventMixin, LoggedModel):
                 raise ValidationError(_('One or more variations do not belong to this event.'))
 
 
+@scopes_disabled()
 def generate_invite_token():
     return get_random_string(length=32, allowed_chars=string.ascii_lowercase + string.digits)
 

src/pretix/base/models/invoices.py

@@ -1,6 +1,7 @@
 import string
 from decimal import Decimal
 
+import pycountry
 from django.db import DatabaseError, models, transaction
 from django.db.models import Max
 from django.db.models.functions import Cast
@@ -9,6 +10,9 @@ from django.utils.crypto import get_random_string
 from django.utils.functional import cached_property
 from django.utils.translation import pgettext
 from django_countries.fields import CountryField
+from django_scopes import ScopedManager
+
+from pretix.base.settings import COUNTRIES_WITH_STATE_IN_ADDRESS
 
 
 def invoice_filename(instance, filename: str) -> str:
@@ -89,6 +93,7 @@ class Invoice(models.Model):
     invoice_to_street = models.TextField(null=True)
     invoice_to_zipcode = models.CharField(max_length=190, null=True)
     invoice_to_city = models.TextField(null=True)
+    invoice_to_state = models.CharField(max_length=190, null=True)
     invoice_to_country = CountryField(null=True)
     invoice_to_vat_id = models.TextField(null=True)
     invoice_to_beneficiary = models.TextField(null=True)
@@ -107,6 +112,8 @@ class Invoice(models.Model):
     file = models.FileField(null=True, blank=True, upload_to=invoice_filename, max_length=255)
     internal_reference = models.TextField(blank=True)
 
+    objects = ScopedManager(organizer='event__organizer')
+
     @staticmethod
     def _to_numeric_invoice_number(number):
         return '{:05d}'.format(int(number))
@@ -137,11 +144,21 @@ class Invoice(models.Model):
     def address_invoice_to(self):
         if self.invoice_to and not self.invoice_to_company and not self.invoice_to_name:
             return self.invoice_to
+
+        state_name = ""
+        if self.invoice_to_state:
+            state_name = self.invoice_to_state
+            if str(self.invoice_to_country) in COUNTRIES_WITH_STATE_IN_ADDRESS:
+                if COUNTRIES_WITH_STATE_IN_ADDRESS[str(self.invoice_to_country)][1] == 'long':
+                    state_name = pycountry.subdivisions.get(
+                        code='{}-{}'.format(self.invoice_to_country, self.invoice_to_state)
+                    ).name
+
         parts = [
             self.invoice_to_company,
             self.invoice_to_name,
             self.invoice_to_street,
-            (self.invoice_to_zipcode or "") + " " + (self.invoice_to_city or ""),
+            ((self.invoice_to_zipcode or "") + " " + (self.invoice_to_city or "") + " " + (state_name or "")).strip(),
             self.invoice_to_country.name if self.invoice_to_country else "",
         ]
         return '\n'.join([p.strip() for p in parts if p and p.strip()])
@@ -172,6 +189,8 @@ class Invoice(models.Model):
             self.organizer = self.order.event.organizer
         if not self.prefix:
             self.prefix = self.event.settings.invoice_numbers_prefix or (self.event.slug.upper() + '-')
+            if self.is_cancellation:
+                self.prefix = self.event.settings.invoice_numbers_prefix_cancellations or self.prefix
         if not self.invoice_no:
             if self.order.testmode:
                 self.prefix += 'TEST-'

src/pretix/base/models/items.py

@@ -17,11 +17,14 @@ from django.utils.functional import cached_property
 from django.utils.timezone import is_naive, make_aware, now
 from django.utils.translation import pgettext_lazy, ugettext_lazy as _
 from django_countries.fields import Country
+from django_scopes import ScopedManager
 from i18nfield.fields import I18nCharField, I18nTextField
 
 from pretix.base.models import fields
 from pretix.base.models.base import LoggedModel
+from pretix.base.models.fields import MultiStringField
 from pretix.base.models.tax import TaxedPrice
+from pretix.base.signals import quota_availability
 
 from .event import Event, SubEvent
 
@@ -155,28 +158,43 @@ class SubEventItemVariation(models.Model):
             self.subevent.event.cache.clear()
 
 
+def filter_available(qs, channel='web', voucher=None, allow_addons=False):
+    q = (
+        # IMPORTANT: If this is updated, also update the ItemVariation query
+        # in models/event.py: EventMixin.annotated()
+        Q(active=True)
+        & Q(Q(available_from__isnull=True) | Q(available_from__lte=now()))
+        & Q(Q(available_until__isnull=True) | Q(available_until__gte=now()))
+        & Q(sales_channels__contains=channel) & Q(require_bundling=False)
+    )
+    if not allow_addons:
+        q &= Q(Q(category__isnull=True) | Q(category__is_addon=False))
+
+    if voucher:
+        if voucher.item_id:
+            q &= Q(pk=voucher.item_id)
+        elif voucher.quota_id:
+            q &= Q(quotas__in=[voucher.quota_id])
+        else:
+            return qs.none()
+    if not voucher or not voucher.show_hidden_items:
+        q &= Q(hide_without_voucher=False)
+
+    return qs.filter(q)
+
+
 class ItemQuerySet(models.QuerySet):
     def filter_available(self, channel='web', voucher=None, allow_addons=False):
-        q = (
+        return filter_available(self, channel, voucher, allow_addons)
-            # IMPORTANT: If this is updated, also update the ItemVariation query
-            # in models/event.py: EventMixin.annotated()
-            Q(active=True)
-            & Q(Q(available_from__isnull=True) | Q(available_from__lte=now()))
-            & Q(Q(available_until__isnull=True) | Q(available_until__gte=now()))
-            & Q(sales_channels__contains=channel) & Q(require_bundling=False)
-        )
-        if not allow_addons:
-            q &= Q(Q(category__isnull=True) | Q(category__is_addon=False))
-        qs = self.filter(q)
 
-        vouchq = Q(hide_without_voucher=False)
+
-        if voucher:
+class ItemQuerySetManager(ScopedManager(organizer='event__organizer').__class__):
-            if voucher.item_id:
+    def __init__(self):
-                vouchq |= Q(pk=voucher.item_id)
+        super().__init__()
-                qs = qs.filter(pk=voucher.item_id)
+        self._queryset_class = ItemQuerySet
-            elif voucher.quota_id:
+
-                qs = qs.filter(quotas__in=[voucher.quota_id])
+    def filter_available(self, channel='web', voucher=None, allow_addons=False):
-        return qs.filter(vouchq)
+        return filter_available(self.get_queryset(), channel, voucher, allow_addons)
 
 
 class Item(LoggedModel):
@@ -226,7 +244,7 @@ class Item(LoggedModel):
     :type sales_channels: bool
     """
 
-    objects = ItemQuerySet.as_manager()
+    objects = ItemQuerySetManager()
 
     event = models.ForeignKey(
         Event,
@@ -293,6 +311,16 @@ class Item(LoggedModel):
         verbose_name=_("Generate tickets"),
         blank=True, null=True,
     )
+    allow_waitinglist = models.BooleanField(
+        verbose_name=_("Show a waiting list for this ticket"),
+        help_text=_("This will only work of waiting lists are enabled for this event."),
+        default=True
+    )
+    show_quota_left = models.NullBooleanField(
+        verbose_name=_("Show number of tickets left"),
+        help_text=_("Publicly show how many tickets are still available."),
+        blank=True, null=True,
+    )
     position = models.IntegerField(
         default=0
     )
@@ -311,6 +339,17 @@ class Item(LoggedModel):
         null=True, blank=True,
         help_text=_('This product will not be sold after the given date.')
     )
+    hidden_if_available = models.ForeignKey(
+        'Quota',
+        null=True, blank=True,
+        on_delete=models.SET_NULL,
+        verbose_name=_("Only show after sellout of"),
+        help_text=_("If you select a quota here, this product will only be shown when that quota is "
+                    "unavailable. If combined with the option to hide sold-out products, this allows you to "
+                    "swap out products for more expensive ones once they are sold out. There might be a short period "
+                    "in which both products are visible while all tickets in the referenced quota are reserved, "
+                    "but not yet sold.")
+    )
     require_voucher = models.BooleanField(
         verbose_name=_('This product can only be bought using a voucher.'),
         default=False,
@@ -328,7 +367,7 @@ class Item(LoggedModel):
         verbose_name=_('This product will only be shown if a voucher matching the product is redeemed.'),
         default=False,
         help_text=_('This product will be hidden from the event page until the user enters a voucher '
-                    'code that is specifically tied to this product (and not via a quota).')
+                    'that unlocks this product.')
     )
     require_bundling = models.BooleanField(
         verbose_name=_('Only sell this product as part of a bundle'),
@@ -391,10 +430,17 @@ class Item(LoggedModel):
             self.event.cache.clear()
 
     def delete(self, *args, **kwargs):
+        self.vouchers.update(item=None, variation=None, quota=None)
         super().delete(*args, **kwargs)
         if self.event:
             self.event.cache.clear()
 
+    @property
+    def do_show_quota_left(self):
+        if self.show_quota_left is None:
+            return self.event.settings.show_quota_left
+        return self.show_quota_left
+
     def tax(self, price=None, base_price_is='auto', currency=None, include_bundled=False):
         price = price if price is not None else self.default_price
 
@@ -447,7 +493,7 @@ class Item(LoggedModel):
         return check_quotas
 
     def check_quotas(self, ignored_quotas=None, count_waitinglist=True, subevent=None, _cache=None,
-                     include_bundled=False, trust_parameters=False):
+                     include_bundled=False, trust_parameters=False, fail_on_no_quotas=False):
         """
         This method is used to determine whether this Item is currently available
         for sale.
@@ -495,6 +541,8 @@ class Item(LoggedModel):
                 res = (code_avail, num_avail)
 
         if len(quotacounter) == 0:
+            if fail_on_no_quotas:
+                return Quota.AVAILABILITY_GONE, 0
             return Quota.AVAILABILITY_OK, sys.maxsize  # backwards compatibility
         return res
 
@@ -591,6 +639,8 @@ class ItemVariation(models.Model):
                     'discounted one. This is just a cosmetic setting and will not actually impact pricing.')
     )
 
+    objects = ScopedManager(organizer='item__event__organizer')
+
     class Meta:
         verbose_name = _("Product variation")
         verbose_name_plural = _("Product variations")
@@ -627,6 +677,7 @@ class ItemVariation(models.Model):
         return t
 
     def delete(self, *args, **kwargs):
+        self.vouchers.update(item=None, variation=None, quota=None)
         super().delete(*args, **kwargs)
         if self.item:
             self.item.event.cache.clear()
@@ -647,7 +698,7 @@ class ItemVariation(models.Model):
         return check_quotas
 
     def check_quotas(self, ignored_quotas=None, count_waitinglist=True, subevent=None, _cache=None,
-                     include_bundled=False, trust_parameters=False) -> Tuple[int, int]:
+                     include_bundled=False, trust_parameters=False, fail_on_no_quotas=False) -> Tuple[int, int]:
         """
         This method is used to determine whether this ItemVariation is currently
         available for sale in terms of quotas.
@@ -689,6 +740,8 @@ class ItemVariation(models.Model):
             if code_avail < res[0] or res[1] is None or num_avail < res[1]:
                 res = (code_avail, num_avail)
         if len(quotacounter) == 0:
+            if fail_on_no_quotas:
+                return Quota.AVAILABILITY_GONE, 0
             return Quota.AVAILABILITY_OK, sys.maxsize  # backwards compatibility
         return res
 
@@ -902,8 +955,8 @@ class Question(LoggedModel):
     :type identifier: str
     :param dependency_question: This question will only show up if the referenced question is set to `dependency_value`.
     :type dependency_question: Question
-    :param dependency_value: The value that `dependency_question` needs to be set to for this question to be applicable.
+    :param dependency_values: The values that `dependency_question` needs to be set to for this question to be applicable.
-    :type dependency_value: str
+    :type dependency_values: list[str]
     """
     TYPE_NUMBER = "N"
     TYPE_STRING = "S"
@@ -929,6 +982,7 @@ class Question(LoggedModel):
         (TYPE_DATETIME, _("Date and time")),
         (TYPE_COUNTRYCODE, _("Country code (ISO 3166-1 alpha-2)")),
     )
+    UNLOCALIZED_TYPES = [TYPE_DATE, TYPE_TIME, TYPE_DATETIME]
 
     event = models.ForeignKey(
         Event,
@@ -971,8 +1025,6 @@ class Question(LoggedModel):
     )
     ask_during_checkin = models.BooleanField(
         verbose_name=_('Ask during check-in instead of in the ticket buying process'),
-        help_text=_('This will only work if you handle your check-in with pretixdroid 1.8 or newer or '
-                    'pretixdesk 0.2 or newer.'),
         default=False
     )
     hidden = models.BooleanField(
@@ -980,10 +1032,16 @@ class Question(LoggedModel):
         help_text=_('This question will only show up in the backend.'),
         default=False
     )
+    print_on_invoice = models.BooleanField(
+        verbose_name=_('Print answer on invoices'),
+        default=False
+    )
     dependency_question = models.ForeignKey(
         'Question', null=True, blank=True, on_delete=models.SET_NULL, related_name='dependent_questions'
     )
-    dependency_value = models.TextField(null=True, blank=True)
+    dependency_values = MultiStringField(default=[])
+
+    objects = ScopedManager(organizer='event__organizer')
 
     class Meta:
         verbose_name = _("Question")
@@ -1234,6 +1292,17 @@ class Quota(LoggedModel):
     cached_availability_paid_orders = models.PositiveIntegerField(null=True, blank=True)
     cached_availability_time = models.DateTimeField(null=True, blank=True)
 
+    close_when_sold_out = models.BooleanField(
+        verbose_name=_('Close this quota permanently once it is sold out'),
+        help_text=_('If you enable this, when the quota is sold out once, no more tickets will be sold, '
+                    'even if tickets become available again through cancellations or expiring orders. Of course, '
+                    'you can always re-open it manually.'),
+        default=False
+    )
+    closed = models.BooleanField(default=False)
+
+    objects = ScopedManager(organizer='event__organizer')
+
     class Meta:
         verbose_name = _("Quota")
         verbose_name_plural = _("Quotas")
@@ -1243,6 +1312,7 @@ class Quota(LoggedModel):
         return self.name
 
     def delete(self, *args, **kwargs):
+        self.vouchers.update(item=None, variation=None, quota=None)
         super().delete(*args, **kwargs)
         if self.event:
             self.event.cache.clear()
@@ -1292,6 +1362,14 @@ class Quota(LoggedModel):
             return _cache[self.pk]
         now_dt = now_dt or now()
         res = self._availability(now_dt, count_waitinglist)
+        for recv, resp in quota_availability.send(sender=self.event, quota=self, result=res,
+                                                  count_waitinglist=count_waitinglist):
+            res = resp
+
+        if res[0] <= Quota.AVAILABILITY_ORDERED and self.close_when_sold_out and not self.closed:
+            self.closed = True
+            self.save(update_fields=['closed'])
+            self.log_action('pretix.event.quota.closed')
 
         self.event.cache.delete('item_quota_cache')
         rewrite_cache = count_waitinglist and (
@@ -1317,8 +1395,11 @@ class Quota(LoggedModel):
             _cache['_count_waitinglist'] = count_waitinglist
         return res
 
-    def _availability(self, now_dt: datetime=None, count_waitinglist=True):
+    def _availability(self, now_dt: datetime=None, count_waitinglist=True, ignore_closed=False):
         now_dt = now_dt or now()
+        if self.closed and not ignore_closed:
+            return Quota.AVAILABILITY_ORDERED, 0
+
         size_left = self.size
         if size_left is None:
             return Quota.AVAILABILITY_OK, None

src/pretix/base/models/orders.py

@@ -9,13 +9,14 @@ from decimal import Decimal
 from typing import Any, Dict, List, Union
 
 import dateutil
+import pycountry
 import pytz
 from django.conf import settings
 from django.db import models, transaction
 from django.db.models import (
     Case, Exists, F, Max, OuterRef, Q, Subquery, Sum, Value, When,
 )
-from django.db.models.functions import Coalesce
+from django.db.models.functions import Coalesce, Greatest
 from django.db.models.signals import post_delete
 from django.dispatch import receiver
 from django.urls import reverse
@@ -26,10 +27,13 @@ from django.utils.functional import cached_property
 from django.utils.timezone import make_aware, now
 from django.utils.translation import pgettext_lazy, ugettext_lazy as _
 from django_countries.fields import Country, CountryField
+from django_scopes import ScopedManager, scopes_disabled
 from i18nfield.strings import LazyI18nString
 from jsonfallback.fields import FallbackJSONField
 
+from pretix.base.banlist import banned
 from pretix.base.decimal import round_decimal
+from pretix.base.email import get_email_context
 from pretix.base.i18n import language
 from pretix.base.models import User
 from pretix.base.reldate import RelativeDateWrapper
@@ -186,6 +190,8 @@ class Order(LockModel, LoggedModel):
         verbose_name=_('E-mail address verified')
     )
 
+    objects = ScopedManager(organizer='event__organizer')
+
     class Meta:
         verbose_name = _("Order")
         verbose_name_plural = _("Orders")
@@ -195,6 +201,8 @@ class Order(LockModel, LoggedModel):
         return self.full_code
 
     def gracefully_delete(self, user=None, auth=None):
+        from . import Voucher
+
         if not self.testmode:
             raise TypeError("Only test mode orders can be deleted.")
         self.event.log_action(
@@ -203,6 +211,12 @@ class Order(LockModel, LoggedModel):
                 'code': self.code,
             }
         )
+
+        if self.status != Order.STATUS_CANCELED:
+            for position in self.positions.all():
+                if position.voucher:
+                    Voucher.objects.filter(pk=position.voucher.pk).update(redeemed=Greatest(0, F('redeemed') - 1))
+
         OrderPosition.all.filter(order=self, addon_to__isnull=False).delete()
         OrderPosition.all.filter(order=self).delete()
         OrderFee.all.filter(order=self).delete()
@@ -223,6 +237,7 @@ class Order(LockModel, LoggedModel):
         return self.all_fees(manager='objects')
 
     @cached_property
+    @scopes_disabled()
     def count_positions(self):
         if hasattr(self, 'pcnt'):
             return self.pcnt or 0
@@ -246,6 +261,7 @@ class Order(LockModel, LoggedModel):
             return None
 
     @property
+    @scopes_disabled()
     def payment_refund_sum(self):
         payment_sum = self.payments.filter(
             state__in=(OrderPayment.PAYMENT_STATE_CONFIRMED, OrderPayment.PAYMENT_STATE_REFUNDED)
@@ -257,6 +273,7 @@ class Order(LockModel, LoggedModel):
         return payment_sum - refund_sum
 
     @property
+    @scopes_disabled()
     def pending_sum(self):
         total = self.total
         if self.status == Order.STATUS_CANCELED:
@@ -431,6 +448,7 @@ class Order(LockModel, LoggedModel):
         return round_decimal(fee, self.event.currency)
 
     @property
+    @scopes_disabled()
     def user_cancel_allowed(self) -> bool:
         """
         Returns whether or not this order can be canceled by the user.
@@ -519,16 +537,30 @@ class Order(LockModel, LoggedModel):
         # handwriting (2/Z, 4/A, 5/S, 6/G). This allows for better detection e.g. in incoming wire transfers that
         # might include OCR'd handwritten text
         charset = list('ABCDEFGHJKLMNPQRSTUVWXYZ3789')
+        iteration = 0
+        length = settings.ENTROPY['order_code']
         while True:
-            code = get_random_string(length=settings.ENTROPY['order_code'], allowed_chars=charset)
+            code = get_random_string(length=length, allowed_chars=charset)
+            iteration += 1
+
+            if banned(code):
+                continue
+
             if self.testmode:
                 # Subtle way to recognize test orders while debugging: They all contain a 0 at the second place,
                 # even though zeros are not used outside test mode.
                 code = code[0] + "0" + code[2:]
+
             if not Order.objects.filter(event__organizer=self.event.organizer, code=code).exists():
                 self.code = code
                 return
 
+            if iteration > 20:
+                # Safeguard: If we don't find an unused and non-blacklisted code within 20 iterations, we increase
+                # the length.
+                length += 1
+                iteration = 0
+
     @property
     def can_modify_answers(self) -> bool:
         """
@@ -615,7 +647,7 @@ class Order(LockModel, LoggedModel):
             ), tz)
         return term_last
 
-    def _can_be_paid(self, count_waitinglist=True, ignore_date=False) -> Union[bool, str]:
+    def _can_be_paid(self, count_waitinglist=True, ignore_date=False, force=False) -> Union[bool, str]:
         error_messages = {
             'late_lastdate': _("The payment can not be accepted as the last date of payments configured in the "
                                "payment settings is over."),
@@ -623,29 +655,37 @@ class Order(LockModel, LoggedModel):
                       "payments should be accepted in the payment settings."),
             'require_approval': _('This order is not yet approved by the event organizer.')
         }
-        if self.require_approval:
+        if not force:
-            return error_messages['require_approval']
+            if self.require_approval:
-        term_last = self.payment_term_last
+                return error_messages['require_approval']
-        if term_last and not ignore_date:
+            term_last = self.payment_term_last
-            if now() > term_last:
+            if term_last and not ignore_date:
-                return error_messages['late_lastdate']
+                if now() > term_last:
+                    return error_messages['late_lastdate']
 
         if self.status == self.STATUS_PENDING:
             return True
-        if not self.event.settings.get('payment_term_accept_late') and not ignore_date:
+        if not self.event.settings.get('payment_term_accept_late') and not ignore_date and not force:
             return error_messages['late']
 
-        return self._is_still_available(count_waitinglist=count_waitinglist)
+        return self._is_still_available(count_waitinglist=count_waitinglist, force=force)
 
-    def _is_still_available(self, now_dt: datetime=None, count_waitinglist=True) -> Union[bool, str]:
+    def _is_still_available(self, now_dt: datetime=None, count_waitinglist=True, force=False) -> Union[bool, str]:
         error_messages = {
             'unavailable': _('The ordered product "{item}" is no longer available.'),
+            'seat_unavailable': _('The seat "{seat}" is no longer available.'),
         }
         now_dt = now_dt or now()
-        positions = self.positions.all().select_related('item', 'variation')
+        positions = self.positions.all().select_related('item', 'variation', 'seat')
         quota_cache = {}
         try:
             for i, op in enumerate(positions):
+                if op.seat:
+                    if not op.seat.is_available(ignore_orderpos=op):
+                        raise Quota.QuotaExceededException(error_messages['seat_unavailable'].format(seat=op.seat))
+                if force:
+                    continue
+
                 quotas = list(op.quotas)
                 if len(quotas) == 0:
                     raise Quota.QuotaExceededException(error_messages['unavailable'].format(
@@ -673,7 +713,7 @@ class Order(LockModel, LoggedModel):
     def send_mail(self, subject: str, template: Union[str, LazyI18nString],
                   context: Dict[str, Any]=None, log_entry_type: str='pretix.event.order.email.sent',
                   user: User=None, headers: dict=None, sender: str=None, invoices: list=None,
-                  auth=None, attach_tickets=False, position: 'OrderPosition'=None):
+                  auth=None, attach_tickets=False, position: 'OrderPosition'=None, auto_email=True):
         """
         Sends an email to the user that placed this order. Basically, this method does two things:
 
@@ -713,7 +753,7 @@ class Order(LockModel, LoggedModel):
                     recipient, subject, template, context,
                     self.event, self.locale, self, headers=headers, sender=sender,
                     invoices=invoices, attach_tickets=attach_tickets,
-                    position=position
+                    position=position, auto_email=auto_email
                 )
             except SendMailException:
                 raise
@@ -733,26 +773,9 @@ class Order(LockModel, LoggedModel):
                 )
 
     def resend_link(self, user=None, auth=None):
-        from pretix.multidomain.urlreverse import build_absolute_uri
-
         with language(self.locale):
-            try:
-                invoice_name = self.invoice_address.name
-                invoice_company = self.invoice_address.company
-            except InvoiceAddress.DoesNotExist:
-                invoice_name = ""
-                invoice_company = ""
             email_template = self.event.settings.mail_text_resend_link
-            email_context = {
+            email_context = get_email_context(event=self.event, order=self)
-                'event': self.event.name,
-                'url': build_absolute_uri(self.event, 'presale:event.order.open', kwargs={
-                    'order': self.code,
-                    'secret': self.secret,
-                    'hash': self.email_confirm_hash()
-                }),
-                'invoice_name': invoice_name,
-                'invoice_company': invoice_company,
-            }
             email_subject = _('Your order: %(code)s') % {'code': self.code}
             self.send_mail(
                 email_subject, email_template, email_context,
@@ -814,6 +837,8 @@ class QuestionAnswer(models.Model):
         max_length=255
     )
 
+    objects = ScopedManager(organizer='question__event__organizer')
+
     @property
     def backend_file_url(self):
         if self.file:
@@ -845,6 +870,10 @@ class QuestionAnswer(models.Model):
             return url
         return ""
 
+    @property
+    def is_image(self):
+        return any(self.file.name.endswith(e) for e in ('.jpg', '.png', '.gif', '.tiff', '.bmp', '.jpeg'))
+
     @property
     def file_name(self):
         return self.file.name.split('.', 1)[-1]
@@ -921,6 +950,8 @@ class AbstractPosition(models.Model):
     :type voucher: Voucher
     :param meta_info: Additional meta information on the position, JSON-encoded.
     :type meta_info: str
+    :param seat: Seat, if reserved seating is used.
+    :type seat: Seat
     """
     subevent = models.ForeignKey(
         SubEvent,
@@ -967,6 +998,9 @@ class AbstractPosition(models.Model):
         verbose_name=_("Meta information"),
         null=True, blank=True
     )
+    seat = models.ForeignKey(
+        'Seat', null=True, blank=True, on_delete=models.PROTECT
+    )
 
     class Meta:
         abstract = True
@@ -1008,18 +1042,17 @@ class AbstractPosition(models.Model):
             q.pk: q for q in questions
         }
 
-        def question_is_visible(parentid, qval):
+        def question_is_visible(parentid, qvals):
             parentq = question_cache[parentid]
-            if parentq.dependency_question_id and not question_is_visible(parentq.dependency_question_id, parentq.dependency_value):
+            if parentq.dependency_question_id and not question_is_visible(parentq.dependency_question_id, parentq.dependency_values):
                 return False
             if parentid not in self.answ:
                 return False
-            if qval == 'True':
+            return (
-                return self.answ[parentid].answer == 'True'
+                ('True' in qvals and self.answ[parentid].answer == 'True')
-            elif qval == 'False':
+                or ('False' in qvals and self.answ[parentid].answer == 'False')
-                return self.answ[parentid].answer == 'False'
+                or (any(qval in [o.identifier for o in self.answ[parentid].options.all()] for qval in qvals))
-            else:
+            )
-                return qval in [o.identifier for o in self.answ[parentid].options.all()]
 
         self.questions = []
         for q in questions:
@@ -1028,7 +1061,7 @@ class AbstractPosition(models.Model):
                 q.answer.question = q  # cache object
             else:
                 q.answer = ""
-            if not q.dependency_question_id or question_is_visible(q.dependency_question_id, q.dependency_value):
+            if not q.dependency_question_id or question_is_visible(q.dependency_question_id, q.dependency_values):
                 self.questions.append(q)
 
     @property
@@ -1137,6 +1170,8 @@ class OrderPayment(models.Model):
     )
     migrated = models.BooleanField(default=False)
 
+    objects = ScopedManager(organizer='order__event__organizer')
+
     class Meta:
         ordering = ('local_id',)
 
@@ -1153,19 +1188,19 @@ class OrderPayment(models.Model):
 
     @info_data.setter
     def info_data(self, d):
-        self.info = json.dumps(d)
+        self.info = json.dumps(d, sort_keys=True)
 
     @cached_property
     def payment_provider(self):
         """
         Cached access to an instance of the payment provider in use.
         """
-        return self.order.event.get_payment_providers().get(self.provider)
+        return self.order.event.get_payment_providers(cached=True).get(self.provider)
 
     def _mark_paid(self, force, count_waitinglist, user, auth, ignore_date=False, overpaid=False):
         from pretix.base.signals import order_paid
-        can_be_paid = self.order._can_be_paid(count_waitinglist=count_waitinglist, ignore_date=ignore_date)
+        can_be_paid = self.order._can_be_paid(count_waitinglist=count_waitinglist, ignore_date=ignore_date, force=force)
-        if not force and can_be_paid is not True:
+        if can_be_paid is not True:
             self.order.log_action('pretix.event.order.quotaexceeded', {
                 'message': can_be_paid
             }, user=user, auth=auth)
@@ -1277,24 +1312,10 @@ class OrderPayment(models.Model):
 
     def _send_paid_mail_attendee(self, position, user):
         from pretix.base.services.mail import SendMailException
-        from pretix.multidomain.urlreverse import build_absolute_uri
 
         with language(self.order.locale):
-            name_scheme = PERSON_NAME_SCHEMES[self.order.event.settings.name_scheme]
             email_template = self.order.event.settings.mail_text_order_paid_attendee
-            email_context = {
+            email_context = get_email_context(event=self.order.event, order=self.order, position=position)
-                'event': self.order.event.name,
-                'downloads': self.order.event.settings.get('ticket_download', as_type=bool),
-                'url': build_absolute_uri(self.order.event, 'presale:event.order.position', kwargs={
-                    'order': self.order.code,
-                    'secret': position.web_secret,
-                    'position': position.positionid
-                }),
-                'attendee_name': position.attendee_name,
-            }
-            for f, l, w in name_scheme['fields']:
-                email_context['attendee_name_%s' % f] = position.attendee_name_parts.get(f, '')
-
             email_subject = _('Event registration confirmed: %(code)s') % {'code': self.order.code}
             try:
                 self.order.send_mail(
@@ -1308,28 +1329,10 @@ class OrderPayment(models.Model):
 
     def _send_paid_mail(self, invoice, user, mail_text):
         from pretix.base.services.mail import SendMailException
-        from pretix.multidomain.urlreverse import build_absolute_uri
 
         with language(self.order.locale):
-            try:
-                invoice_name = self.order.invoice_address.name
-                invoice_company = self.order.invoice_address.company
-            except InvoiceAddress.DoesNotExist:
-                invoice_name = ""
-                invoice_company = ""
             email_template = self.order.event.settings.mail_text_order_paid
-            email_context = {
+            email_context = get_email_context(event=self.order.event, order=self.order, payment_info=mail_text)
-                'event': self.order.event.name,
-                'url': build_absolute_uri(self.order.event, 'presale:event.order.open', kwargs={
-                    'order': self.order.code,
-                    'secret': self.order.secret,
-                    'hash': self.order.email_confirm_hash()
-                }),
-                'downloads': self.order.event.settings.get('ticket_download', as_type=bool),
-                'invoice_name': invoice_name,
-                'invoice_company': invoice_company,
-                'payment_info': mail_text
-            }
             email_subject = _('Payment received for your order: %(code)s') % {'code': self.order.code}
             try:
                 self.order.send_mail(
@@ -1493,6 +1496,8 @@ class OrderRefund(models.Model):
         null=True, blank=True
     )
 
+    objects = ScopedManager(organizer='order__event__organizer')
+
     class Meta:
         ordering = ('local_id',)
 
@@ -1509,7 +1514,7 @@ class OrderRefund(models.Model):
 
     @info_data.setter
     def info_data(self, d):
-        self.info = json.dumps(d)
+        self.info = json.dumps(d, sort_keys=True)
 
     @cached_property
     def payment_provider(self):
@@ -1554,7 +1559,7 @@ class OrderRefund(models.Model):
         super().save(*args, **kwargs)
 
 
-class ActivePositionManager(models.Manager):
+class ActivePositionManager(ScopedManager(organizer='order__event__organizer').__class__):
     def get_queryset(self):
         return super().get_queryset().filter(canceled=False)
 
@@ -1631,7 +1636,7 @@ class OrderFee(models.Model):
     )
     canceled = models.BooleanField(default=False)
 
-    all = models.Manager()
+    all = ScopedManager(organizer='order__event__organizer')
     objects = ActivePositionManager()
 
     @property
@@ -1736,7 +1741,7 @@ class OrderPosition(AbstractPosition):
     )
     canceled = models.BooleanField(default=False)
 
-    all = models.Manager()
+    all = ScopedManager(organizer='order__event__organizer')
     objects = ActivePositionManager()
 
     class Meta:
@@ -1836,6 +1841,7 @@ class OrderPosition(AbstractPosition):
 
         return super().save(*args, **kwargs)
 
+    @scopes_disabled()
     def assign_pseudonymization_id(self):
         # This omits some character pairs completely because they are hard to read even on screens (1/I and O/0)
         # and includes only one of two characters for some pairs because they are sometimes hard to distinguish in
@@ -1875,25 +1881,26 @@ class OrderPosition(AbstractPosition):
         """
         from pretix.base.services.mail import SendMailException, mail, render_mail
 
-        if not self.email:
+        if not self.attendee_email:
             return
 
         for k, v in self.event.meta_data.items():
             context['meta_' + k] = v
 
-        with language(self.locale):
+        with language(self.order.locale):
-            recipient = self.email
+            recipient = self.attendee_email
             try:
                 email_content = render_mail(template, context)
                 mail(
                     recipient, subject, template, context,
-                    self.event, self.locale, self, headers, sender,
+                    self.event, self.order.locale, order=self.order, headers=headers, sender=sender,
+                    position=self,
                     invoices=invoices, attach_tickets=attach_tickets
                 )
             except SendMailException:
                 raise
             else:
-                self.log_action(
+                self.order.log_action(
                     log_entry_type,
                     user=user,
                     auth=auth,
@@ -1906,6 +1913,18 @@ class OrderPosition(AbstractPosition):
                     }
                 )
 
+    def resend_link(self, user=None, auth=None):
+
+        with language(self.order.locale):
+            email_template = self.event.settings.mail_text_resend_link
+            email_context = get_email_context(event=self.order.event, order=self.order, position=self)
+            email_subject = _('Your event registration: %(code)s') % {'code': self.order.code}
+            self.send_mail(
+                email_subject, email_template, email_context,
+                'pretix.event.order.email.resend', user=user, auth=auth,
+                attach_tickets=True
+            )
+
 
 class CartPosition(AbstractPosition):
     """
@@ -1943,6 +1962,8 @@ class CartPosition(AbstractPosition):
     )
     is_bundled = models.BooleanField(default=False)
 
+    objects = ScopedManager(organizer='event__organizer')
+
     class Meta:
         verbose_name = _("Cart position")
         verbose_name_plural = _("Cart positions")
@@ -1979,6 +2000,7 @@ class InvoiceAddress(models.Model):
     city = models.CharField(max_length=255, verbose_name=_('City'), blank=False)
     country_old = models.CharField(max_length=255, verbose_name=_('Country'), blank=False)
     country = CountryField(verbose_name=_('Country'), blank=False, blank_label=_('Select country'))
+    state = models.CharField(max_length=255, verbose_name=pgettext_lazy('address', 'State'), blank=True)
     vat_id = models.CharField(max_length=255, blank=True, verbose_name=_('VAT ID'),
                               help_text=_('Only for business customers within the EU.'))
     vat_id_validated = models.BooleanField(default=False)
@@ -1992,6 +2014,8 @@ class InvoiceAddress(models.Model):
         blank=True
     )
 
+    objects = ScopedManager(organizer='order__event__organizer')
+
     def save(self, **kwargs):
         if self.order:
             self.order.touch()
@@ -2003,6 +2027,22 @@ class InvoiceAddress(models.Model):
             self.name_parts = {}
         super().save(**kwargs)
 
+    @property
+    def state_name(self):
+        sd = pycountry.subdivisions.get(code='{}-{}'.format(self.country, self.state))
+        if sd:
+            return sd.name
+        return self.state
+
+    @property
+    def state_for_address(self):
+        from pretix.base.settings import COUNTRIES_WITH_STATE_IN_ADDRESS
+        if not self.state or str(self.country) not in COUNTRIES_WITH_STATE_IN_ADDRESS:
+            return ""
+        if COUNTRIES_WITH_STATE_IN_ADDRESS[str(self.country)][1] == 'long':
+            return self.state_name
+        return self.state
+
     @property
     def name(self):
         if not self.name_parts:

src/pretix/base/models/seating.py

@@ -0,0 +1,124 @@
+import json
+from collections import namedtuple
+
+import jsonschema
+from django.contrib.staticfiles import finders
+from django.core.exceptions import ValidationError
+from django.db import models
+from django.utils.deconstruct import deconstructible
+from django.utils.timezone import now
+from django.utils.translation import gettext, ugettext_lazy as _
+
+from pretix.base.models import Event, Item, LoggedModel, Organizer, SubEvent
+
+
+@deconstructible
+class SeatingPlanLayoutValidator:
+    def __call__(self, value):
+        if not isinstance(value, dict):
+            try:
+                val = json.loads(value)
+            except ValueError:
+                raise ValidationError(_('Your layout file is not a valid JSON file.'))
+        else:
+            val = value
+        with open(finders.find('seating/seating-plan.schema.json'), 'r') as f:
+            schema = json.loads(f.read())
+        try:
+            jsonschema.validate(val, schema)
+        except jsonschema.ValidationError as e:
+            raise ValidationError(_('Your layout file is not a valid seating plan. Error message: {}').format(str(e)))
+
+
+class SeatingPlan(LoggedModel):
+    """
+    Represents an abstract seating plan, without relation to any event.
+    """
+    name = models.CharField(max_length=190, verbose_name=_('Name'))
+    organizer = models.ForeignKey(Organizer, related_name='seating_plans', on_delete=models.CASCADE)
+    layout = models.TextField(validators=[SeatingPlanLayoutValidator()])
+
+    Category = namedtuple('Categrory', 'name')
+    RawSeat = namedtuple('Seat', 'name guid number row category zone')
+
+    def __str__(self):
+        return self.name
+
+    @property
+    def layout_data(self):
+        return json.loads(self.layout)
+
+    @layout_data.setter
+    def layout_data(self, v):
+        self.layout = json.dumps(v)
+
+    def get_categories(self):
+        return [
+            self.Category(name=c['name'])
+            for c in self.layout_data['categories']
+        ]
+
+    def iter_all_seats(self):
+        for z in self.layout_data['zones']:
+            for r in z['rows']:
+                for s in r['seats']:
+                    yield self.RawSeat(
+                        number=s['seat_number'],
+                        guid=s['seat_guid'],
+                        name='{} {}'.format(r['row_number'], s['seat_number']),  # TODO: Zone? Variable scheme?
+                        row=r['row_number'],
+                        zone=z['name'],
+                        category=s['category']
+                    )
+
+
+class SeatCategoryMapping(models.Model):
+    """
+    Input seating plans have abstract "categories", such as "Balcony seat", etc. This model maps them to actual
+    pretix product on a per-(sub)event level.
+    """
+    event = models.ForeignKey(Event, related_name='seat_category_mappings', on_delete=models.CASCADE)
+    subevent = models.ForeignKey(SubEvent, null=True, blank=True, related_name='seat_category_mappings', on_delete=models.CASCADE)
+    layout_category = models.CharField(max_length=190)
+    product = models.ForeignKey(Item, related_name='seat_category_mappings', on_delete=models.CASCADE)
+
+
+class Seat(models.Model):
+    """
+    This model is used to represent every single specific seat within an (sub)event that can be selected. It's mainly
+    used for internal bookkeeping and not to be modified by users directly.
+    """
+    event = models.ForeignKey(Event, related_name='seats', on_delete=models.CASCADE)
+    subevent = models.ForeignKey(SubEvent, null=True, blank=True, related_name='seats', on_delete=models.CASCADE)
+    name = models.CharField(max_length=190)
+    zone_name = models.CharField(max_length=190, blank=True, default="")
+    row_name = models.CharField(max_length=190, blank=True, default="")
+    seat_number = models.CharField(max_length=190, blank=True, default="")
+    seat_guid = models.CharField(max_length=190, db_index=True)
+    product = models.ForeignKey('Item', null=True, blank=True, related_name='seats', on_delete=models.CASCADE)
+    blocked = models.BooleanField(default=False)
+
+    def __str__(self):
+        parts = []
+        if self.zone_name:
+            parts.append(self.zone_name)
+        if self.row_name:
+            parts.append(gettext('Row {number}').format(number=self.row_name))
+        if self.seat_number:
+            parts.append(gettext('Seat {number}').format(number=self.seat_number))
+        if not parts:
+            return self.name
+        return ', '.join(parts)
+
+    def is_available(self, ignore_cart=None, ignore_orderpos=None):
+        from .orders import Order
+
+        if self.blocked:
+            return False
+        opqs = self.orderposition_set.filter(order__status__in=[Order.STATUS_PENDING, Order.STATUS_PAID])
+        cpqs = self.cartposition_set.filter(expires__gte=now())
+        if ignore_cart:
+            cpqs = cpqs.exclude(pk=ignore_cart.pk)
+        if ignore_orderpos:
+            opqs = opqs.exclude(pk=ignore_orderpos.pk)
+        return not opqs.exists() and not cpqs.exists()

src/pretix/base/models/tax.py

@@ -85,6 +85,12 @@ EU_CURRENCIES = {
 }
 
 
+def cc_to_vat_prefix(country_code):
+    if country_code == 'GR':
+        return 'EL'
+    return country_code
+
+
 class TaxRule(LoggedModel):
     event = models.ForeignKey('Event', related_name='tax_rules', on_delete=models.CASCADE)
     name = I18nCharField(

src/pretix/base/models/vouchers.py

@@ -8,6 +8,10 @@ from django.db.models import Q
 from django.utils.crypto import get_random_string
 from django.utils.timezone import now
 from django.utils.translation import pgettext_lazy, ugettext_lazy as _
+from django_scopes import ScopedManager, scopes_disabled
+
+from pretix.base.banlist import banned
+from pretix.base.models import SeatCategoryMapping
 
 from ..decimal import round_decimal
 from .base import LoggedModel
@@ -18,11 +22,15 @@ from .orders import Order
 
 def _generate_random_code(prefix=None):
     charset = list('ABCDEFGHKLMNPQRSTUVWXYZ23456789')
+    rnd = None
+    while not rnd or banned(rnd):
+        rnd = get_random_string(length=settings.ENTROPY['voucher_code'], allowed_chars=charset)
     if prefix:
-        return prefix + get_random_string(length=settings.ENTROPY['voucher_code'], allowed_chars=charset)
+        return prefix + rnd
-    return get_random_string(length=settings.ENTROPY['voucher_code'], allowed_chars=charset)
+    return rnd
 
 
+@scopes_disabled()
 def generate_code(prefix=None):
     while True:
         code = _generate_random_code(prefix=prefix)
@@ -138,22 +146,26 @@ class Voucher(LoggedModel):
     item = models.ForeignKey(
         Item, related_name='vouchers',
         verbose_name=_("Product"),
-        null=True, blank=True, on_delete=models.CASCADE,
+        null=True, blank=True,
+        on_delete=models.PROTECT,  # We use a fake version of SET_NULL in Item.delete()
         help_text=_(
             "This product is added to the user's cart if the voucher is redeemed."
         )
     )
     variation = models.ForeignKey(
         ItemVariation, related_name='vouchers',
-        null=True, blank=True, on_delete=models.CASCADE,
+        null=True, blank=True,
+        on_delete=models.PROTECT,  # We use a fake version of SET_NULL in ItemVariation.delete() to avoid the semantic change
+                                   # that would happen if we just set variation to None
         verbose_name=_("Product variation"),
         help_text=_(
             "This variation of the product select above is being used."
         )
     )
     quota = models.ForeignKey(
-        Quota, related_name='quota',
+        Quota, related_name='vouchers',
-        null=True, blank=True, on_delete=models.CASCADE,
+        null=True, blank=True,
+        on_delete=models.PROTECT,  # We use a fake version of SET_NULL in Quota.delete()
         verbose_name=_("Quota"),
         help_text=_(
             "If enabled, the voucher is valid for any product affected by this quota."
@@ -172,6 +184,12 @@ class Voucher(LoggedModel):
         help_text=_("The text entered in this field will not be visible to the user and is available for your "
                     "convenience.")
     )
+    show_hidden_items = models.BooleanField(
+        verbose_name=_("Shows hidden products that match this voucher"),
+        default=True
+    )
+
+    objects = ScopedManager(organizer='event__organizer')
 
     class Meta:
         verbose_name = _("Voucher")
@@ -391,3 +409,14 @@ class Voucher(LoggedModel):
         """
 
         return Order.objects.filter(all_positions__voucher__in=[self]).distinct()
+
+    def seating_available(self):
+        kwargs = {}
+        if self.subevent:
+            kwargs['subevent'] = self.subevent
+        if self.quota_id:
+            return SeatCategoryMapping.objects.filter(product__quotas__pk=self.quota_id, **kwargs).exists()
+        elif self.item_id:
+            return self.item.seat_category_mappings.filter(**kwargs).exists()
+        else:
+            return False

src/pretix/base/models/waitinglist.py

@@ -4,11 +4,12 @@ from django.core.exceptions import ValidationError
 from django.db import models, transaction
 from django.utils.timezone import now
 from django.utils.translation import pgettext_lazy, ugettext_lazy as _
+from django_scopes import ScopedManager
 
+from pretix.base.email import get_email_context
 from pretix.base.i18n import language
 from pretix.base.models import Voucher
 from pretix.base.services.mail import mail
-from pretix.multidomain.urlreverse import build_absolute_uri
 
 from .base import LoggedModel
 from .event import Event, SubEvent
@@ -67,6 +68,8 @@ class WaitingListEntry(LoggedModel):
     )
     priority = models.IntegerField(default=0)
 
+    objects = ScopedManager(organizer='event__organizer')
+
     class Meta:
         verbose_name = _("Waiting list entry")
         verbose_name_plural = _("Waiting list entries")
@@ -127,13 +130,7 @@ class WaitingListEntry(LoggedModel):
                 self.email,
                 _('You have been selected from the waitinglist for {event}').format(event=str(self.event)),
                 self.event.settings.mail_text_waiting_list,
-                {
+                get_email_context(event=self.event, waiting_list_entry=self),
-                    'event': self.event.name,
-                    'url': build_absolute_uri(self.event, 'presale:event.redeem') + '?voucher=' + self.voucher.code,
-                    'code': self.voucher.code,
-                    'product': str(self.item) + (' - ' + str(self.variation) if self.variation else ''),
-                    'hours': self.event.settings.waiting_list_hours,
-                },
                 self.event,
                 locale=self.locale
             )

src/pretix/base/payment.py

@@ -249,9 +249,7 @@ class BasePaymentProvider:
             ('_fee_percent',
              forms.DecimalField(
                  label=_('Additional fee'),
-                 help_text=_('Percentage of the order total. Note that this percentage will currently only '
+                 help_text=_('Percentage of the order total.'),
-                             'be calculated on the summed price of sold tickets, not on other fees like e.g. shipping '
-                             'fees, if there are any.'),
                  localize=True,
                  required=False,
              )),
@@ -298,11 +296,12 @@ class BasePaymentProvider:
         """
         return ""
 
-    def render_invoice_text(self, order: Order) -> str:
+    def render_invoice_text(self, order: Order, payment: OrderPayment) -> str:
         """
         This is called when an invoice for an order with this payment provider is generated.
         The default implementation returns the content of the _invoice_text configuration
-        variable (an I18nString), or an empty string if unconfigured.
+        variable (an I18nString), or an empty string if unconfigured. For paid orders, the
+        default implementation always renders a string stating that the invoice is already paid.
         """
         if order.status == Order.STATUS_PAID:
             return pgettext_lazy('invoice', 'The payment for this invoice has already been received.')
@@ -532,7 +531,7 @@ class BasePaymentProvider:
         containing the URL the user will be redirected to. If you are done with your process
         you should return the user to the order's detail page.
 
-        If the payment is completed, you should call ``payment.confirm()``. Please note that ``this`` might
+        If the payment is completed, you should call ``payment.confirm()``. Please note that this might
         raise a ``Quota.QuotaExceededException`` if (and only if) the payment term of this order is over and
         some of the items are sold out. You should use the exception message to display a meaningful error
         to the user.
@@ -547,13 +546,14 @@ class BasePaymentProvider:
         """
         return None
 
-    def order_pending_mail_render(self, order: Order) -> str:
+    def order_pending_mail_render(self, order: Order, payment: OrderPayment) -> str:
         """
         After the user has submitted their order, they will receive a confirmation
         email. You can return a string from this method if you want to add additional
         information to this email.
 
         :param order: The order object
+        :param payment: The payment object
         """
         return ""
 
@@ -657,6 +657,15 @@ class BasePaymentProvider:
         obj.info = '{}'
         obj.save(update_fields=['info'])
 
+    def api_payment_details(self, payment: OrderPayment):
+        """
+        Will be called to populate the ``details`` parameter of the payment in the REST API.
+
+        :param payment: The payment in question.
+        :return: A serializable dictionary
+        """
+        return {}
+
 
 class PaymentException(Exception):
     pass
@@ -720,6 +729,12 @@ class BoxOfficeProvider(BasePaymentProvider):
     def order_change_allowed(self, order: Order) -> bool:
         return False
 
+    def api_payment_details(self, payment: OrderPayment):
+        return {
+            "pos_id": payment.info_data.get('pos_id', None),
+            "receipt_id": payment.info_data.get('receipt_id', None),
+        }
+
     def payment_control_render(self, request, payment) -> str:
         if not payment.info:
             return
@@ -864,6 +879,11 @@ class OffsettingProvider(BasePaymentProvider):
     def order_change_allowed(self, order: Order) -> bool:
         return False
 
+    def api_payment_details(self, payment: OrderPayment):
+        return {
+            "orders": payment.info_data.get('orders', []),
+        }
+
     def payment_control_render(self, request: HttpRequest, payment: OrderPayment) -> str:
         return _('Balanced against orders: %s' % ', '.join(payment.info_data['orders']))