Update src/pretix/control/views/orders.py

There is one I couldn't fix: Loading the list of tax rules for every
select box on the OrderChange page. Unfortunately, Django has a
cache-breaking .all() in ModelChoiceField and that would need nasty
patching that didn't feel worth it

.dockerignore

@@ -1,5 +1,6 @@
 doc/
 env/
+node_modules/
 res/
 local/
 .git/

.editorconfig

@@ -0,0 +1,5 @@
+[*.{js,jsx,ts,tsx,vue}]
+indent_style = tab
+indent_size = 2
+trim_trailing_whitespace = true
+insert_final_newline = true

.github/workflows/build.yml

@@ -46,4 +46,7 @@ jobs:
       - name: Run build
         run: python -m build
       - name: Check files
-        run: unzip -l dist/pretix*whl | grep node_modules || exit 1
+        run: |
+          for pat in 'static.dist/vite/widget/widget.js' 'static.dist/vite/control/assets/checkinrules/main-' 'static.dist/vite/control/assets/webcheckin/main-'; do
+            unzip -l dist/pretix*whl | grep -q "$pat" || { echo "Missing: $pat"; exit 1; }
+          done

.github/workflows/style-js.yml

@@ -0,0 +1,43 @@
+name: JS Code Style
+
+on:
+  push:
+    branches: [ master ]
+    paths:
+      - 'src/pretix/static/pretixpresale/widget/**'
+      - 'src/pretix/static/pretixcontrol/js/ui/checkinrules/**'
+      - 'src/pretix/plugins/webcheckin/**'
+      - 'eslint.config.mjs'
+      - 'package.json'
+      - 'package-lock.json'
+  pull_request:
+    branches: [ master ]
+    paths:
+      - 'src/pretix/static/pretixpresale/widget/**'
+      - 'src/pretix/static/pretixcontrol/js/ui/checkinrules/**'
+      - 'src/pretix/plugins/webcheckin/**'
+      - 'eslint.config.mjs'
+      - 'package.json'
+      - 'package-lock.json'
+
+permissions:
+  contents: read
+
+env:
+  FORCE_COLOR: 1
+
+jobs:
+  eslint:
+    name: eslint
+    runs-on: ubuntu-22.04
+    steps:
+      - uses: actions/checkout@v4
+      - name: Set up Node.js 24
+        uses: actions/setup-node@v4
+        with:
+          node-version: 24
+          cache: npm
+      - name: Install Dependencies
+        run: npm ci
+      - name: Run ESLint
+        run: npm run lint:eslint

.github/workflows/tests.yml

@@ -72,7 +72,7 @@ jobs:
         run: make all compress
       - name: Run tests
         working-directory: ./src
-        run: PRETIX_CONFIG_FILE=tests/ci_${{ matrix.database }}.cfg py.test -n 3 -p no:sugar --cov=./ --cov-report=xml tests --maxfail=100
+        run: PRETIX_CONFIG_FILE=tests/ci_${{ matrix.database }}.cfg py.test -n 3 -p no:sugar --cov=./ --cov-report=xml tests --ignore=tests/e2e --maxfail=100
       - name: Run concurrency tests
         working-directory: ./src
         run: PRETIX_CONFIG_FILE=tests/ci_${{ matrix.database }}.cfg py.test tests/concurrency_tests/ --reuse-db
@@ -84,3 +84,46 @@ jobs:
           token: ${{ secrets.CODECOV_TOKEN }}
           fail_ci_if_error: false
         if: matrix.database == 'postgres' && matrix.python-version == '3.13'
+  e2e:
+    runs-on: ubuntu-22.04
+    name: E2E Tests
+    services:
+      postgres:
+        image: postgres:15
+        env:
+          POSTGRES_PASSWORD: postgres
+          POSTGRES_DB: pretix
+        options: >-
+          --health-cmd "pg_isready -U postgres -d pretix"
+          --health-interval 10s
+          --health-timeout 5s
+          --health-retries 5
+        ports:
+          - 5432:5432
+    steps:
+      - uses: actions/checkout@v4
+      - name: Set up Python
+        uses: actions/setup-python@v5
+        with:
+          python-version: "3.13"
+      - uses: actions/cache@v4
+        with:
+          path: ~/.cache/pip
+          key: ${{ runner.os }}-pip-${{ hashFiles('**/requirements.txt') }}
+          restore-keys: |
+            ${{ runner.os }}-pip-
+      - name: Install system dependencies
+        run: sudo apt update && sudo apt install -y gettext
+      - name: Install Python dependencies
+        run: pip3 install uv && uv pip install --system -e ".[dev]" psycopg2-binary
+      - name: Install JS dependencies
+        working-directory: ./src
+        run: make npminstall
+      - name: Compile
+        working-directory: ./src
+        run: make all compress
+      - name: Install Playwright browsers
+        run: playwright install
+      - name: Run E2E tests
+        working-directory: ./src
+        run: PRETIX_CONFIG_FILE=tests/ci_postgres.cfg py.test tests/e2e/ -v --maxfail=10

.gitignore

@@ -24,5 +24,7 @@ local/
 .project
 .pydevproject
 .DS_Store
+node_modules/
+.vite/
 
 

.gitlab-ci.yml

@@ -10,9 +10,9 @@ tests:
         - cd src
         - python manage.py check
         - make all compress
-        - PRETIX_CONFIG_FILE=tests/ci_sqlite.cfg py.test -n 3 tests --maxfail=100
+        - PRETIX_CONFIG_FILE=tests/ci_sqlite.cfg py.test -n 3 tests --ignore=tests/e2e --maxfail=100
     except:
-        - pypi
+        - '/^v.*$/'
 pypi:
     stage: release
     image:
@@ -35,7 +35,7 @@ pypi:
         - twine check dist/*
         - twine upload dist/*
     only:
-        - pypi
+        - '/^v.*$/'
     artifacts:
         paths:
             - src/dist/

.node-version

@@ -1 +1 @@
-17
+24

.prettierignore

@@ -0,0 +1 @@
+/*

Dockerfile

@@ -1,6 +1,7 @@
 FROM python:3.13-trixie
 
-RUN apt-get update && \
+RUN curl -fsSL https://deb.nodesource.com/setup_22.x | bash - && \
+    apt-get update && \
     apt-get install -y --no-install-recommends \
             build-essential \
             gettext \
@@ -21,8 +22,7 @@ RUN apt-get update && \
             libmaxminddb0 \
             libmaxminddb-dev \
             zlib1g-dev \
-            nodejs  \
-            npm && \
+            nodejs && \
     apt-get clean && \
     rm -rf /var/lib/apt/lists/* && \
     dpkg-reconfigure locales &&  \
@@ -31,6 +31,7 @@ RUN apt-get update && \
     mkdir /etc/pretix && \
     mkdir /data && \
     useradd -ms /bin/bash -d /pretix -u 15371 pretixuser && \
+    chmod 0755 /pretix && \
     echo 'pretixuser ALL=(ALL) NOPASSWD:SETENV: /usr/bin/supervisord' >> /etc/sudoers && \
     mkdir /static && \
     mkdir /etc/supervisord
@@ -49,11 +50,14 @@ COPY deployment/docker/production_settings.py /pretix/src/production_settings.py
 COPY pyproject.toml /pretix/pyproject.toml
 COPY _build /pretix/_build
 COPY src /pretix/src
+COPY package.json /pretix/package.json
+COPY package-lock.json /pretix/package-lock.json
+COPY tsconfig.json /pretix/tsconfig.json
+COPY vite.config.ts /pretix/vite.config.ts
 
 RUN pip3 install -U \
         pip \
-        setuptools \
-        wheel && \
+        setuptools && \
     cd /pretix && \
     PRETIX_DOCKER_BUILD=TRUE pip3 install \
         -e ".[memcached]" \

MANIFEST.in

@@ -48,3 +48,8 @@ recursive-include src Makefile
 recursive-exclude doc *
 recursive-exclude deployment *
 recursive-exclude res *
+
+include package.json
+include package-lock.json
+include tsconfig.json
+include vite.config.ts

doc/api/resources/carts.rst

@@ -192,7 +192,7 @@ Cart position endpoints
    * ``attendee_email`` (optional)
    * ``subevent`` (optional)
    * ``expires`` (optional)
-   * ``includes_tax`` (optional, **deprecated**, do not use, will be removed)
+   * ``includes_tax`` (optional, **DEPRECATED**, do not use, will be removed)
    * ``sales_channel`` (optional)
    * ``voucher`` (optional, expect a voucher code)
    * ``addons`` (optional, expect a list of nested objects of cart positions)

doc/api/resources/checkin.rst

@@ -46,12 +46,14 @@ Checking a ticket in
                         this request twice with the same nonce, the second request will also succeed but will always
                         create only one check-in object even when the previous request was successful as well. This
                         allows for a certain level of idempotency and enables you to re-try after a connection failure.
+   :<json string exchange_medium_type: To perform an exchange to a reusable medium, pass the type of the new reusable medium
+   :<json string exchange_medium_identifier: To perform an exchange to a reusable media, pass the identifier of the new medium
    :<json boolean use_order_locale: Specifies that pretix should use the customer's language (``locale`` field from the
                                     order) when building texts (currently only the ``reason_explanation`` response field).
                                     Defaults to ``false`` in which case the server will determine the language (currently
                                     the event default language, might change in the future with support for the
                                     ``Accept-Language`` header).
-   :>json string status: ``"ok"``, ``"incomplete"``, or ``"error"``
+   :>json string status: ``"ok"``, ``"incomplete"``, ``"exchange"``, or ``"error"``
    :>json string reason: Reason code, only set on status ``"error"``, see below for possible values.
    :>json string reason_explanation: Human-readable explanation, only set on status ``"error"`` and reason ``"rules"``, can be null.
    :>json object position: Copy of the matching order position (if any was found). The contents are the same as the
@@ -67,6 +69,8 @@ Checking a ticket in
    :>json object list: Excerpt of information about the matching :ref:`check-in list <rest-checkinlists>` (if any was found),
                        including the attributes ``id``, ``name``, ``event``, ``subevent``, and ``include_pending``.
    :>json object questions: List of questions to be answered for check-in, only set on status ``"incomplete"``.
+   :>json object media_policy: Reusable media policy (see documentation on items), only set on status ``"exchange"``.
+   :>json object media_type: Reusable media type (see documentation on items), only set on status ``"exchange"``.
 
    **Example request**:
 
@@ -224,6 +228,9 @@ Checking a ticket in
    * ``ambiguous`` - Multiple tickets match scan, rejected.
    * ``revoked`` - Ticket code has been revoked.
    * ``unapproved`` - Order has not yet been approved.
+   * ``already_exchanged`` - Ticket already has been exchanged for a reusable medium that must now be used for check-in.
+   * ``medium_invalid`` - Reusable medium identifier given was not found or is not valid.
+   * ``medium_exists`` - Reusable medium identifier already exists, but expected to be new.
    * ``error`` - Internal error.
 
    In case of reason ``rules`` and ``invalid_time``, there might be an additional response field ``reason_explanation``

doc/api/resources/checkinlists.rst

@@ -351,7 +351,8 @@ Endpoints
 
    :<json boolean error_reason: One of ``canceled``, ``invalid``, ``unpaid``, ``product``, ``rules``, ``revoked``,
                                 ``incomplete``, ``already_redeemed``, ``blocked``, ``invalid_time``, or ``error``. Required.
-   :<json raw_barcode: The raw barcode you scanned. Required.
+   :<json raw_barcode: The raw barcode or identifier you scanned. Required.
+   :<json raw_source_type: The type of medium you scanned, defaults to ``barcode``. Optional.
    :<json datetime: Date and time of the scan. Optional.
    :<json type: Type of scan, defaults to ``"entry"``.
    :<json position: Internal ID of an order position you matched. Optional.
@@ -602,7 +603,8 @@ Order position endpoints
 
       We no longer recommend using this API if you're building a ticket scanning application, as it has a few design
       flaws that can lead to `security issues`_ or compatibility issues due to barcode content characters that are not
-      URL-safe. We recommend to use our new :ref:`check-in API <rest-checkin>` instead.
+      URL-safe. We recommend to use our new :ref:`check-in API <rest-checkin>` instead. Advanced features like medium
+      exchange are only supported on the new API.
 
    :query boolean untrusted_input: If set to true, the lookup parameter is **always** interpreted as a ``secret``, never
                                    as an ``id``. This should be always set if you are passing through untrusted, scanned
@@ -741,6 +743,9 @@ Order position endpoints
    * ``ambiguous`` - Multiple tickets match scan, rejected.
    * ``revoked`` - Ticket code has been revoked.
    * ``unapproved`` - Order has not yet been approved.
+   * ``already_exchanged`` - Ticket already has been exchanged for a reusable medium that must now be used for check-in.
+   * ``medium_invalid`` - Reusable medium identifier given was not found and could not be automatically created.
+   * ``medium_exists`` - Reusable medium identifier already exists, but expected to be new.
 
    In case of reason ``rules`` or ``invalid_time``, there might be an additional response field ``reason_explanation``
    with a human-readable description of the violated rules. However, that field can also be missing or be ``null``.

doc/api/resources/exhibitors.rst

@@ -844,3 +844,187 @@ You can also fetch existing leads (if you are authorized to do so):
    :statuscode 200: No error
    :statuscode 401: Invalid authentication code
    :statuscode 403: Not permitted to access bulk data
+
+Retrieving Vouchers
+"""""""""""""""""""
+
+Vouchers returned by the App API use a different format than described in :ref:`rest-vouchers`.
+
+.. rst-class:: rest-resource-table
+
+===================================== ========================== =======================================================
+Field                                 Type                       Description
+===================================== ========================== =======================================================
+id                                    integer                    Internal ID of the voucher
+code                                  string                     The voucher code that is required to redeem the voucher
+max_usages                            integer                    The maximum number of times this voucher can be
+                                                                 redeemed (default: 1).
+redeemed                              integer                    The number of times this voucher already has been
+                                                                 redeemed.
+valid_until                           datetime                   The voucher expiration date (or ``null``).
+subevent                              string                     Name of the date inside an event series this voucher belongs to (or ``null``).
+tag                                   string                     A string that is used for grouping vouchers
+comment                               string                     An internal exhibitor comment on the voucher.
+items                                 list of strings            A list of items this voucher is restricted to (or ``null``).
+price_mode                            string                     Determines how this voucher affects product prices.
+                                                                 Possible values:
+
+                                                                 * ``none`` – No effect on price
+                                                                 * ``set`` – The product price is set to the given ``value``
+                                                                 * ``subtract`` – The product price is determined by the original price *minus* the given ``value``
+                                                                 * ``percent`` – The product price is determined by the original price reduced by the percentage given in ``value``
+value                                 decimal (string)           The value (see ``price_mode``)
+redemptions                           list of objects            A list of objects, where each object represents an order position that has been purchased using the voucher.
+                                                                 Each entry will contains the fields ``attendee_fields``, ``redemption_date`` and ``subevent``.
+
+                                                                 The attendee data in the ``attendee_fields`` that is shown is based on the event's configuration, and each entry
+                                                                 contains the fields ``id``, ``label``, ``value``, and ``details``. ``details`` is usually empty
+                                                                 except in a few cases where it contains an additional list of objects
+                                                                 with ``value`` and ``label`` keys (e.g. splitting of names).
+===================================== ========================== =======================================================
+
+
+.. http:get:: /exhibitors/api/v1/vouchers/
+
+   Returns a list of all vouchers connected to the exhibitor.
+
+   Note that the ``attendee_fields`` array can contain any number of dynamic keys!
+   Depending on the exhibitors permission and event configuration this might be empty, or contain lots of details.
+   The app should dynamically show these values (read-only) with the labels sent by the server.
+
+
+   **Example request**:
+
+   .. sourcecode:: http
+
+      GET /exhibitors/api/v1/vouchers/ 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": 1,
+            "code": "43K6LKM37FBVR2YG",
+            "max_usages": 1,
+            "redeemed": 0,
+            "valid_until": null,
+            "subevent": null,
+            "tag": "testvoucher",
+            "comment": "",
+            "items": [
+                "All"
+            ],
+            "price_mode": "set",
+            "value": "12.00",
+            "redemptions": [
+              {
+                "attendee_fields": [
+                  {
+                    "id": "attendee_name",
+                    "label": "Name",
+                    "value": "Jon Doe",
+                    "details": [
+                      {"label": "Given name", "value": "John"},
+                      {"label": "Family name", "value": "Doe"},
+                    ]
+                  },
+                  {
+                    "id": "attendee_email",
+                    "label": "Email",
+                    "value": "test@example.com",
+                    "details": []
+                  }
+                ],
+                "redemption_date": "2026-05-06",
+                "subevent": null
+              },
+            ]
+          }
+        ]
+      }
+
+   :statuscode 200: No error
+   :statuscode 401: Invalid authentication code
+   :statuscode 403: Not permitted to access bulk data
+
+.. http:get:: /exhibitors/api/v1/vouchers/(id)/
+
+   Returns the details of a single, specific voucher connected to the exhibitor.
+
+   Note that the ``attendee_fields`` array can contain any number of dynamic keys!
+   Depending on the exhibitors permission and event configuration this might be empty, or contain lots of details.
+   The app should dynamically show these values (read-only) with the labels sent by the server.
+
+
+   **Example request**:
+
+   .. sourcecode:: http
+
+      GET /exhibitors/api/v1/vouchers/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": 1,
+        "code": "43K6LKM37FBVR2YG",
+        "max_usages": 1,
+        "redeemed": 0,
+        "valid_until": null,
+        "subevent": null,
+        "tag": "testvoucher",
+        "comment": "",
+        "items": [
+            "All"
+        ],
+        "price_mode": "set",
+        "value": "12.00",
+        "redemptions": [
+          {
+            "attendee_fields": [
+              {
+                "id": "attendee_name",
+                "label": "Name",
+                "value": "Jon Doe",
+                "details": [
+                  {"label": "Given name", "value": "John"},
+                  {"label": "Family name", "value": "Doe"},
+                ]
+              },
+              {
+                "id": "attendee_email",
+                "label": "Email",
+                "value": "test@example.com",
+                "details": []
+              }
+            ],
+            "redemption_date": "2026-05-06",
+            "subevent": null
+          },
+        ]
+      }
+
+   :param id: The ``id`` field of the voucher to fetch
+   :statuscode 200: No error
+   :statuscode 401: Invalid authentication code
+   :statuscode 403: Not permitted to access bulk data
+   :statuscode 404: Voucher not found in system

doc/api/resources/item_program_times.rst

@@ -16,6 +16,7 @@ Field                                 Type                       Description
 id                                    integer                    Internal ID of the program time
 start                                 datetime                   The start date time for this program time slot.
 end                                   datetime                   The end date time for this program time slot.
+location                              multi-lingual string       The program time slot's location (or ``null``)
 ===================================== ========================== =======================================================
 
 .. versionchanged:: TODO
@@ -54,17 +55,20 @@ Endpoints
             {
                "id": 2,
                "start": "2025-08-14T22:00:00Z",
-               "end": "2025-08-15T00:00:00Z"
+               "end": "2025-08-15T00:00:00Z",
+               "location": null
             },
             {
                "id": 3,
                "start": "2025-08-12T22:00:00Z",
-               "end": "2025-08-13T22:00:00Z"
+               "end": "2025-08-13T22:00:00Z",
+               "location": null
             },
             {
                "id": 14,
                "start": "2025-08-15T22:00:00Z",
-               "end": "2025-08-17T22:00:00Z"
+               "end": "2025-08-17T22:00:00Z",
+               "location": null
             }
         ]
       }
@@ -99,7 +103,8 @@ Endpoints
       {
          "id": 1,
          "start": "2025-08-15T22:00:00Z",
-         "end": "2025-10-27T23:00:00Z"
+         "end": "2025-10-27T23:00:00Z",
+         "location": null
       }
 
    :param organizer: The ``slug`` field of the organizer to fetch
@@ -125,7 +130,8 @@ Endpoints
 
       {
         "start": "2025-08-15T10:00:00Z",
-        "end": "2025-08-15T22:00:00Z"
+        "end": "2025-08-15T22:00:00Z",
+        "location": null
       }
 
    **Example response**:
@@ -139,7 +145,8 @@ Endpoints
       {
         "id": 17,
         "start": "2025-08-15T10:00:00Z",
-        "end": "2025-08-15T22:00:00Z"
+        "end": "2025-08-15T22:00:00Z",
+        "location": null
       }
 
    :param organizer: The ``slug`` field of the organizer of the event/item to create a program time for

doc/api/resources/items.rst

@@ -131,7 +131,7 @@ allow_waitinglist                       boolean                    If ``false``,
                                                                    product when it is sold out.
 issue_giftcard                          boolean                    If ``true``, buying this product will yield a gift card.
 media_policy                            string                     Policy on how to handle reusable media (experimental feature).
-                                                                   Possible values are ``null``, ``"new"``, ``"reuse"``, and ``"reuse_or_new"``.
+                                                                   Possible values are ``null``, ``"new"``, ``"reuse"``, ``"reuse_or_new"``, ``"append"``, and ``"append_or_new"``.
 media_type                              string                     Type of reusable media to work on (experimental feature). See :ref:`rest-reusablemedia` for possible choices.
 show_quota_left                         boolean                    Publicly show how many tickets are still available.
                                                                    If this is ``null``, the event default is used.

doc/api/resources/orders.rst

@@ -864,6 +864,9 @@ Generating new secrets
 
    Triggers generation of new ``secret`` and ``web_secret`` attributes for both the order and all order positions.
 
+   Ticket secrets of order positions that have been used to issue a gift card can not
+   be changed. Only the link (``web_secret``) will be changed in this case.
+
    **Example request**:
 
    .. sourcecode:: http
@@ -895,6 +898,9 @@ Generating new secrets
 
    Triggers generation of a new ``secret`` and ``web_secret`` attribute for a single order position.
 
+   Ticket secrets of order positions that have been used to issue a gift card can not
+   be changed. Only the link (``web_secret``) will be changed in this case.
+
    **Example request**:
 
    .. sourcecode:: http
@@ -1069,7 +1075,7 @@ Creating orders
       * ``valid_from`` (optional, if both ``valid_from`` and ``valid_until`` are **missing** (not ``null``) the availability will be computed from the given product)
       * ``valid_until`` (optional, if both ``valid_from`` and ``valid_until`` are **missing** (not ``null``) the availability will be computed from the given product)
       * ``requested_valid_from`` (optional, can be set **instead** of ``valid_from`` and ``valid_until`` to signal a user choice for the start time that may or may not be respected)
-      * ``use_reusable_medium`` (optional, causes the new ticket to take over the given reusable medium, identified by its ID)
+      * ``use_reusable_medium`` (optional, causes the new ticket to be connected to the given reusable medium, identified by its ID)
       * ``discount`` (optional, only possible if ``price`` is set; attention: if this is set to not-``null`` on any position, automatic calculation of discounts will not run)
       * ``answers``
 

doc/api/resources/reusablemedia.rst

@@ -21,12 +21,16 @@ id                                    integer                    Internal ID of
 type                                  string                     Type of medium, e.g. ``"barcode"``, ``"nfc_uid"`` or ``"nfc_mf0aes"``.
 organizer                             string                     Organizer slug of the organizer who "owns" this medium.
 identifier                            string                     Unique identifier of the medium. The format depends on the ``type``.
+claim_token                           string                     Secret token to claim ownership of the medium (or ``null``)
+label                                 string                     Label to identify the medium, usually something human readable (or ``null``)
 active                                boolean                    Whether this medium may be used.
 created                               datetime                   Date of creation
 updated                               datetime                   Date of last modification
 expires                               datetime                   Expiry date (or ``null``)
 customer                              string                     Identifier of a customer account this medium belongs to.
-linked_orderposition                  integer                    Internal ID of a ticket this medium is linked to.
+linked_orderpositions                 list of integers           Internal IDs of tickets this medium is linked to.
+linked_orderposition                  integer                    **DEPRECATED.** ID of the ticket the medium is linked to, if it is linked to 
+                                                                 only one ticket. ``null``, if the medium is linked to none or multiple tickets.
 linked_giftcard                       integer                    Internal ID of a gift card this medium is linked to.
 info                                  object                     Additional data, content depends on the ``type``. Consider
                                                                  this internal to the system and don't use it for your own data.
@@ -39,6 +43,14 @@ Existing media types are:
 - ``nfc_uid``
 - ``nfc_mf0aes``
 
+
+.. versionchanged:: 2026.5
+
+   The ``claim_token``, ``label``, ``linked_orderpositions`` attributes have been added, the ``linked_orderposition`` attribute has been
+   deprecated. Note: To maintain backwards compatibility ``linked_orderposition`` contains the internal ID of the linked order position
+   if the medium has exactly one order position in ``linked_orderpositions``.
+
+
 Endpoints
 ---------
 
@@ -77,6 +89,7 @@ Endpoints
             "active": True,
             "expires": None,
             "customer": None,
+            "linked_orderpositions": [],
             "linked_orderposition": None,
             "linked_giftcard": None,
             "notes": None,
@@ -92,10 +105,13 @@ Endpoints
    :query string customer: Only show media linked to the given customer.
    :query string created_since: Only show media created since a given date.
    :query string updated_since: Only show media updated since a given date.
+   :query integer linked_orderpositions: Only show media linked to the given tickets. Note: you can pass multiple ticket IDs by passing
+                                         ``linked_orderpositions`` multiple times. Any medium matching any linked orderposition will be returned.
    :query integer linked_orderposition: Only show media linked to the given ticket.
    :query integer linked_giftcard: Only show media linked to the given gift card.
-   :query string expand: If you pass ``"linked_giftcard"``, ``"linked_giftcard.owner_ticket"``, ``"linked_orderposition"``,
-                         or ``"customer"``, the respective field will be shown as a nested value instead of just an ID.
+   :query string expand: If you pass ``"linked_giftcard"``, ``"linked_giftcard.owner_ticket"``, ``"linked_orderpositions"``,
+                         ``"linked_orderposition"`` (**DEPRECATED**), or ``"customer"``, the respective field will be shown 
+                         as a nested value instead of just an ID.
                          The nested objects are identical to the respective resources, except that order positions
                          will have an attribute of the format ``"order": {"code": "ABCDE", "event": "eventslug"}`` to make
                          matching easier. The parameter can be given multiple times.
@@ -134,6 +150,7 @@ Endpoints
         "active": True,
         "expires": None,
         "customer": None,
+        "linked_orderpositions": [],
         "linked_orderposition": None,
         "linked_giftcard": None,
         "notes": None,
@@ -191,6 +208,7 @@ Endpoints
         "active": True,
         "expires": None,
         "customer": None,
+        "linked_orderpositions": [],
         "linked_orderposition": None,
         "linked_giftcard": None,
         "notes": None,
@@ -198,9 +216,9 @@ Endpoints
       }
 
    :param organizer: The ``slug`` field of the organizer to look up a medium for
-   :query string expand: If you pass ``"linked_giftcard"``, ``"linked_orderposition"``, oder ``"customer"``, the respective
+   :query string expand: If you pass ``"linked_giftcard"``, ``"linked_orderpositions"``, or ``"customer"``, the respective
                          field will be shown as a nested value instead of just an ID. The nested objects are identical to
-                         the respective resources, except that the ``linked_orderposition`` will have an attribute of the
+                         the respective resources, except that the ``linked_orderpositions`` each will have an attribute of the
                          format ``"order": {"code": "ABCDE", "event": "eventslug"}`` to make matching easier. The parameter
                          can be given multiple times.
    :statuscode 201: no error
@@ -227,6 +245,7 @@ Endpoints
         "active": True,
         "expires": None,
         "customer": None,
+        "linked_orderpositions": [],
         "linked_orderposition": None,
         "linked_giftcard": None,
         "notes": None,
@@ -251,6 +270,7 @@ Endpoints
         "active": True,
         "expires": None,
         "customer": None,
+        "linked_orderpositions": [],
         "linked_orderposition": None,
         "linked_giftcard": None,
         "notes": None,
@@ -258,7 +278,7 @@ Endpoints
       }
 
    :param organizer: The ``slug`` field of the organizer to create a medium for
-   :query string expand: If you pass ``"linked_giftcard"``, ``"linked_orderposition"``, oder ``"customer"``, the respective
+   :query string expand: If you pass ``"linked_giftcard"``, ``"linked_orderpositions"``, or ``"customer"``, the respective
                          field will be shown as a nested value instead of just an ID. The nested objects are identical to
                          the respective resources, except that the ``linked_orderposition`` will have an attribute of the
                          format ``"order": {"code": "ABCDE", "event": "eventslug"}`` to make matching easier. The parameter
@@ -287,7 +307,7 @@ Endpoints
       Content-Length: 94
 
       {
-        "linked_orderposition": 13
+        "linked_orderpositions": [13, 29]
       }
 
    **Example response**:
@@ -308,7 +328,8 @@ Endpoints
         "active": True,
         "expires": None,
         "customer": None,
-        "linked_orderposition": 13,
+        "linked_orderpositions": [13, 29],
+        "linked_orderposition": None,
         "linked_giftcard": None,
         "notes": None,
         "info": {}
@@ -316,7 +337,7 @@ Endpoints
 
    :param organizer: The ``slug`` field of the organizer to modify
    :param id: The ``id`` field of the medium to modify
-   :query string expand: If you pass ``"linked_giftcard"``, ``"linked_orderposition"``, oder ``"customer"``, the respective
+   :query string expand: If you pass ``"linked_giftcard"``, ``"linked_orderpositions"``, or ``"customer"``, the respective
                          field will be shown as a nested value instead of just an ID. The nested objects are identical to
                          the respective resources, except that the ``linked_orderposition`` will have an attribute of the
                          format ``"order": {"code": "ABCDE", "event": "eventslug"}`` to make matching easier. The parameter

doc/api/resources/webhooks.rst

@@ -70,6 +70,7 @@ The following values for ``action_types`` are valid with pretix core:
     * ``pretix.subevent.changed``
     * ``pretix.subevent.deleted``
     * ``pretix.event.item.*``
+    * ``pretix.event.quota.*``
     * ``pretix.event.live.activated``
     * ``pretix.event.live.deactivated``
     * ``pretix.event.testmode.activated``

doc/development/api/general.rst

@@ -64,8 +64,8 @@ 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, subevent_forms,
-             item_formsets, order_search_filter_q, order_search_forms
+             order_info, order_approve_info, event_settings_widget, oauth_application_registered,
+             order_position_buttons, subevent_forms, item_formsets, order_search_filter_q, order_search_forms, subevent_detail_html
 
 .. automodule:: pretix.base.signals
    :no-index:

doc/development/contribution/style.rst

@@ -86,7 +86,7 @@ individual commits, we use "Rebase and merge" instead. Merge commits should be a
 .. _PEP 8: https://legacy.python.org/dev/peps/pep-0008/
 .. _flake8: https://pypi.python.org/pypi/flake8
 .. _Django Coding Style: https://docs.djangoproject.com/en/dev/internals/contributing/writing-code/coding-style/
-.. _translation: https://docs.djangoproject.com/en/1.11/topics/i18n/translation/
-.. _class-based views: https://docs.djangoproject.com/en/1.11/topics/class-based-views/
+.. _translation: https://docs.djangoproject.com/en/6.0/topics/i18n/translation/
+.. _class-based views: https://docs.djangoproject.com/en/6.0/topics/class-based-views/
 .. _pytest-style: https://docs.pytest.org/en/latest/assert.html
 .. _fixtures: https://docs.pytest.org/en/latest/fixture.html

doc/development/implementation/urlconfig.rst

@@ -81,7 +81,7 @@ is a python method that emulates a behavior similar to ``reverse``:
 
 If you need to communicate the URL externally, you can use a different method to ensure that it is always an absolute URL:
 
-.. autofunction:: pretix.multidomain.urlreverse.build_absolute_uri
+.. autofunction:: pretix.multidomain.urlreverse.eventreverse_absolute
 
 In addition, there is a template tag that works similar to ``url`` but takes an event or organizer object
 as its first argument and can be used like this::

doc/development/setup.rst

@@ -53,7 +53,7 @@ Working with the code
 ---------------------
 If you do not have a recent installation of ``nodejs``, install it now::
 
-    curl -sL https://deb.nodesource.com/setup_17.x | sudo -E bash -
+    curl -sL https://deb.nodesource.com/setup_24.x | sudo -E bash -
     sudo apt install nodejs
 
 To make sure it is on your path variable, close and reopen your terminal. Now, install the Python-level dependencies of pretix::
@@ -110,6 +110,56 @@ process::
 
 However, beware that code changes will not auto-reload within Celery.
 
+Running the local development server will also automatically start a vite dev server for all control vue components.
+
+Run the widget development server
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+To locally develop the presale widget you need to start a separate vite dev server using::
+
+    npm run dev:widget
+
+You can control the org, event and much more via query parameters like this::
+
+    http://localhost:5180/?org=testorg&event=testevent
+
+The following query parameters are supported:
+
+.. list-table::
+   :header-rows: 1
+   :widths: 20 20 60
+
+   * - Parameter
+     - Default
+     - Description
+   * - ``org``
+     - ``testorg``
+     - Organization slug
+   * - ``event``
+     - ``testevent``
+     - Event slug
+   * - ``host``
+     - ``http://localhost:8000``
+     - Backend host URL
+   * - ``type``
+     - ``widget``
+     - Element type: ``widget`` or ``button``
+   * - ``mode``
+     - ``dev``
+     - ``dev`` loads the Vite dev source, ``prod`` loads the built ``v2.{lang}.js``
+   * - ``lang``
+     - ``de``
+     - Language code for the prod script
+   * - ``button-text``
+     - ``Buy tickets!``
+     - Text content for the button (only used when ``type=button``)
+
+Any other query parameter is passed through as an attribute on the widget/button element.
+For example, ``?skip-ssl-check&list-type=calendar&items=123`` adds those attributes directly.
+
+
+
+
 .. _`checksandtests`:
 
 Code checks and unit tests

eslint.config.mjs

@@ -0,0 +1,108 @@
+import { defineConfig, globalIgnores } from 'eslint/config'
+import globals from 'globals'
+import js from '@eslint/js'
+import ts from 'typescript-eslint'
+import stylistic from '@stylistic/eslint-plugin'
+import vue from 'eslint-plugin-vue'
+import vuePug from 'eslint-plugin-vue-pug'
+
+const ignores = globalIgnores([
+	'**/node_modules',
+	'**/dist'
+])
+
+export default defineConfig([
+	ignores,
+	...ts.config(
+		js.configs.recommended,
+		ts.configs.recommended
+	),
+	stylistic.configs.customize({
+		indent: 'tab',
+		braceStyle: '1tbs',
+		quoteProps: 'as-needed'
+	}),
+	...vue.configs['flat/recommended'],
+	...vuePug.configs['flat/recommended'],
+	{
+		languageOptions: {
+			globals: {
+				...globals.browser,
+				...globals.node,
+				localStorage: false,
+				$: 'readonly',
+				$$: 'readonly',
+				$ref: 'readonly',
+				$computed: 'readonly',
+			},
+			parserOptions: {
+				parser: '@typescript-eslint/parser'
+			}
+		},
+
+		rules: {
+			'no-debugger': 'off',
+			curly: 0,
+			'no-return-assign': 0,
+			'no-console': 'off',
+			'vue/require-default-prop': 0,
+			'vue/require-v-for-key': 0,
+			'vue/valid-v-for': 'warn',
+			'vue/no-reserved-keys': 0,
+			'vue/no-setup-props-destructure': 0,
+			'vue/multi-word-component-names': 0,
+			'vue/max-attributes-per-line': 0,
+			'vue/attribute-hyphenation': ['warn', 'never'],
+			'vue/v-on-event-hyphenation': ['warn', 'never'],
+			'import/first': 0,
+			'@typescript-eslint/ban-ts-comment': 0,
+			'@typescript-eslint/no-explicit-any': 0,
+			'no-use-before-define': 'off',
+			'no-var': 'error',
+
+			'@typescript-eslint/no-use-before-define': ['error', {
+				typedefs: false,
+				functions: false,
+			}],
+
+			'@typescript-eslint/no-unused-vars': ['error', {
+				args: 'all',
+				argsIgnorePattern: '^_',
+				caughtErrors: 'all',
+				caughtErrorsIgnorePattern: '^_',
+				destructuredArrayIgnorePattern: '^_',
+				varsIgnorePattern: '^_',
+				ignoreRestSiblings: true
+			}],
+
+			'@stylistic/comma-dangle': 0,
+			'@stylistic/space-before-function-paren': ['error', 'always'],
+			'@stylistic/max-statements-per-line': ['error', { max: 1, ignoredNodes: ['BreakStatement'] }],
+			'@stylistic/member-delimiter-style': 0,
+			'@stylistic/arrow-parens': 0,
+			'@stylistic/generator-star-spacing': 0,
+			'@stylistic/yield-star-spacing': ['error', 'after'],
+		},
+	},
+	{
+		files: [
+			'src/pretix/static/pretixcontrol/js/ui/checkinrules/**/*.vue',
+			'src/pretix/plugins/webcheckin/**/*.vue',
+		],
+		languageOptions: {
+			globals: {
+				moment: 'readonly',
+			},
+		},
+	},
+	{
+		files: [
+			'src/pretix/static/pretixpresale/widget/**/*.{ts,vue}',
+		],
+		languageOptions: {
+			globals: {
+				LANG: 'readonly',
+			},
+		},
+	},
+])

package.json

@@ -0,0 +1,52 @@
+{
+  "name": "pretix",
+  "version": "1.0.0",
+  "description": "",
+  "homepage": "https://github.com/pretix/pretix#readme",
+  "bugs": {
+    "url": "https://github.com/pretix/pretix/issues"
+  },
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/pretix/pretix.git"
+  },
+  "license": "SEE LICENSE IN LICENSE",
+  "author": "",
+  "type": "module",
+  "main": "index.js",
+  "directories": {
+    "doc": "doc"
+  },
+  "scripts": {
+    "dev:control": "vite",
+    "dev:widget": "vite src/pretix/static/pretixpresale/widget",
+    "build": "npm run build:control -s && npm run build:widget -s",
+    "build:control": "vite build",
+    "build:widget": "vite build src/pretix/static/pretixpresale/widget",
+    "lint:eslint": "eslint src/pretix/static/pretixpresale/widget src/pretix/static/pretixcontrol/js/ui/checkinrules src/pretix/plugins/webcheckin",
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "dependencies": {
+    "vue": "^3.5.30"
+  },
+  "devDependencies": {
+    "@eslint/js": "^10.0.1",
+    "@stylistic/eslint-plugin": "^5.10.0",
+    "@types/jquery": "^3.5.33",
+    "@types/moment": "^2.11.29",
+    "@types/node": "^25.5.0",
+    "@vitejs/plugin-vue": "^6.0.5",
+    "@vue/eslint-config-typescript": "^14.7.0",
+    "@vue/language-plugin-pug": "^3.2.5",
+    "eslint": "^10.0.3",
+    "eslint-plugin-vue": "^10.8.0",
+    "eslint-plugin-vue-pug": "^1.0.0-alpha.5",
+    "globals": "^17.4.0",
+    "pug": "^3.0.3",
+    "sass-embedded": "^1.98.0",
+    "smol-toml": "^1.6.1",
+    "stylus": "^0.64.0",
+    "typescript-eslint": "^8.57.0",
+    "vite": "^8.0.0"
+  }
+}

pyproject.toml

@@ -27,24 +27,24 @@ classifiers = [
 ]
 
 dependencies = [
-  "arabic-reshaper==3.0.0",  # Support for Arabic in reportlab
+  "arabic-reshaper==3.0.1",  # Support for Arabic in reportlab
   "babel",
-  "BeautifulSoup4==4.14.*",
-  "bleach==6.3.*",
+  "BeautifulSoup4==4.15.*",
+  "bleach==6.4.*",
   "celery==5.6.*",
   "chardet==5.2.*",
-  "cryptography>=47.0.0",
-  "css-inline==0.20.*",
+  "cryptography>=49.0.0",
+  "css-inline==0.21.*",
   "defusedcsv>=3.0.0",
   "dnspython==2.*",
   "Django[argon2]==5.2.*",
   "django-bootstrap3==26.1",
   "django-compressor==4.6.0",
-  "django-countries==8.2.*",
-  "django-filter==25.1",
+  "django-countries==9.0.*",
+  "django-filter==26.1",
   "django-formset-js-improved==0.5.0.5",
-  "django-formtools==2.5.1",
-  "django-hierarkey==2.0.*,>=2.0.1",
+  "django-formtools==2.7",
+  "django-hierarkey==2.0.*,>=2.0.2",
   "django-hijack==3.7.*",
   "django-i18nfield==1.11.*",
   "django-libsass==0.9",
@@ -53,10 +53,11 @@ dependencies = [
   "django-oauth-toolkit==2.3.*",
   "django-otp==1.7.*",
   "django-phonenumber-field==8.4.*",
-  "django-redis==6.0.*",
+  "django-querytagger==0.0.3",
+  "django-redis==7.0.*",
   "django-scopes==2.0.*",
   "django-statici18n==2.7.*",
-  "djangorestframework==3.16.*",
+  "djangorestframework==3.17.*",
   "dnspython==2.8.*",
   "drf_ujson2==1.7.*",
   "geoip2==5.*",
@@ -74,11 +75,11 @@ dependencies = [
   "packaging",
   "paypalrestsdk==1.13.*",
   "paypal-checkout-serversdk==1.0.*",
-  "PyJWT==2.12.*",
+  "PyJWT==2.13.*",
   "phonenumberslite==9.0.*",
-  "Pillow==12.2.*",
+  "Pillow==12.3.*",
   "pretix-plugin-build",
-  "protobuf==7.34.*",
+  "protobuf==7.35.*",
   "psycopg2-binary",
   "pycountry",
   "pycparser==3.0",
@@ -91,9 +92,9 @@ dependencies = [
   "pyuca",
   "qrcode==8.2",
   "redis==7.4.*",
-  "reportlab==4.4.*",
-  "requests==2.32.*",
-  "sentry-sdk==2.58.*",
+  "reportlab==5.0.*",
+  "requests==2.34.*",
+  "sentry-sdk==2.66.*",
   "sepaxml==2.7.*",
   "stripe==7.9.*",
   "text-unidecode==1.*",
@@ -101,30 +102,32 @@ dependencies = [
   "tqdm==4.*",
   "ua-parser==1.0.*",
   "vobject==0.9.*",
-  "webauthn==2.7.*",
+  "webauthn==3.0.*",
   "zeep==4.3.*"
 ]
 
 [project.optional-dependencies]
 memcached = ["pylibmc"]
 dev = [
-  "aiohttp==3.13.*",
+  "aiohttp==3.14.*",
   "coverage",
   "coveralls",
-  "fakeredis==2.34.*",
+  "fakeredis==2.36.*",
   "flake8==7.3.*",
   "freezegun",
   "isort==8.0.*",
   "pep8-naming==0.15.*",
   "potypo",
-  "pytest-asyncio>=1.3.0",
+  "pytest-asyncio>=1.4.0",
   "pytest-cache",
   "pytest-cov",
   "pytest-django==4.*",
   "pytest-mock==3.15.*",
   "pytest-sugar",
   "pytest-xdist==3.8.*",
-  "pytest==9.0.*",
+  "pytest-playwright",
+  "pytest==9.1.*",
+  "playwright",
   "responses",
 ]
 
@@ -137,8 +140,6 @@ build-backend = "backend"
 backend-path = ["_build"]
 requires = [
   "setuptools",
-  "setuptools-rust",
-  "wheel",
   "importlib_metadata",
   "tomli",
 ]

setup.cfg

@@ -37,4 +37,9 @@ ignore =
     CONTRIBUTING.md
     Dockerfile
     SECURITY.md
+    eslint.config.mjs
+    package-lock.json
+    package.json
+    tsconfig.json
+    vite.config.js
 

src/Makefile

@@ -6,13 +6,13 @@ localecompile:
 	./manage.py compilemessages
 
 localegen:
-	./manage.py makemessages --keep-pot --ignore "pretix/static/npm_dir/*" $(LNGS)
-	./manage.py makemessages --keep-pot -d djangojs --ignore "pretix/static/npm_dir/*" --ignore "pretix/helpers/*" --ignore "pretix/static/jsi18n/*" --ignore "pretix/static/jsi18n/*" --ignore "pretix/static.dist/*" --ignore "data/*" --ignore "pretix/static/rrule/*" --ignore "build/*" $(LNGS)
+	./manage.py makemessages --keep-pot --add-location file --ignore "pretix/static/npm_dir/*" $(LNGS)
+	./manage.py makemessages --keep-pot --add-location file -e js,ts,vue -d djangojs --ignore "pretix/static/npm_dir/*" --ignore "pretix/helpers/*" --ignore "pretix/static/jsi18n/*" --ignore "pretix/static/jsi18n/*" --ignore "pretix/static.dist/*" --ignore "data/*" --ignore "pretix/static/rrule/*" --ignore "build/*" $(LNGS)
 
-staticfiles: jsi18n
+staticfiles: npminstall npmbuild jsi18n
 	./manage.py collectstatic --noinput
 
-compress: npminstall
+compress:
 	./manage.py compress
 
 jsi18n: localecompile
@@ -25,8 +25,8 @@ coverage:
 	coverage run -m py.test
 
 npminstall:
-	# keep this in sync with pretix/_build.py!
-	mkdir -p pretix/static.dist/node_prefix/
-	cp -r pretix/static/npm_dir/* pretix/static.dist/node_prefix/
-	npm ci --prefix=pretix/static.dist/node_prefix
+	npm ci
+
+npmbuild:
+	npm run build
 

src/pretix/__init__.py

@@ -19,4 +19,4 @@
 # You should have received a copy of the GNU Affero General Public License along with this program.  If not, see
 # <https://www.gnu.org/licenses/>.
 #
-__version__ = "2026.4.0"
+__version__ = "2026.7.0.dev0"

src/pretix/_base_settings.py

@@ -37,9 +37,11 @@ INSTALLED_APPS = [
     'django.contrib.contenttypes',
     'django.contrib.sessions',
     'django.contrib.messages',
-    'django.contrib.staticfiles',
     'django.contrib.humanize',
+    # pretix needs to go before staticfiles
+    # so we can override the runserver command
     'pretix.base',
+    'django.contrib.staticfiles',
     'pretix.control',
     'pretix.presale',
     'pretix.multidomain',
@@ -116,6 +118,7 @@ ALL_LANGUAGES = [
     ('sv', _('Swedish')),
     ('es', _('Spanish')),
     ('es-419', _('Spanish (Latin America)')),
+    ('th', _('Thai')),
     ('tr', _('Turkish')),
     ('uk', _('Ukrainian')),
 ]
@@ -243,7 +246,6 @@ STORAGES = {
 
 COMPRESS_PRECOMPILERS = (
     ('text/x-scss', 'django_libsass.SassCompiler'),
-    ('text/vue', 'pretix.helpers.compressor.VueCompiler'),
 )
 
 COMPRESS_OFFLINE_CONTEXT = {

src/pretix/_build.py

@@ -21,13 +21,13 @@
 #
 
 import os
-import shutil
 import subprocess
 
 from setuptools.command.build import build
 from setuptools.command.build_ext import build_ext
 
 here = os.path.abspath(os.path.dirname(__file__))
+project_root = os.path.abspath(os.path.join(here, '..', '..'))
 npm_installed = False
 
 
@@ -35,14 +35,14 @@ def npm_install():
     global npm_installed
 
     if not npm_installed:
-        # keep this in sync with Makefile!
-        node_prefix = os.path.join(here, 'static.dist', 'node_prefix')
-        os.makedirs(node_prefix, exist_ok=True)
-        shutil.copytree(os.path.join(here, 'static', 'npm_dir'), node_prefix, dirs_exist_ok=True)
-        subprocess.check_call('npm ci', shell=True, cwd=node_prefix)
+        subprocess.check_call('npm ci', shell=True, cwd=project_root)
         npm_installed = True
 
 
+def npm_build():
+    subprocess.check_call('npm run build', shell=True, cwd=project_root)
+
+
 class CustomBuild(build):
     def run(self):
         if "src" not in os.listdir(".") or "pretix" not in os.listdir("src"):
@@ -62,6 +62,7 @@ class CustomBuild(build):
         settings.COMPRESS_OFFLINE = True
 
         npm_install()
+        npm_build()
         management.call_command('compilemessages', verbosity=1)
         management.call_command('compilejsi18n', verbosity=1)
         management.call_command('collectstatic', verbosity=1, interactive=False)

src/pretix/_build_settings.py

@@ -47,3 +47,5 @@ HAS_MEMCACHED = False
 HAS_CELERY = False
 HAS_GEOIP = False
 SENTRY_ENABLED = False
+VITE_DEV_MODE = False
+VITE_IGNORE = False

src/pretix/api/auth/devicesecurity.py

@@ -108,8 +108,11 @@ class PretixScanSecurityProfile(AllowListSecurityProfile):
         ('GET', 'api-v1:event.settings'),
         ('POST', 'api-v1:upload'),
         ('POST', 'api-v1:checkinrpc.redeem'),
+        ('POST', 'api-v1:checkinrpc.annull'),
         ('GET', 'api-v1:checkinrpc.search'),
         ('GET', 'api-v1:reusablemedium-list'),
+        ('POST', 'api-v1:reusablemedium-lookup'),
+        ('PATCH', 'api-v1:reusablemedium-detail')
     )
 
 
@@ -144,6 +147,7 @@ class PretixScanNoSyncNoSearchSecurityProfile(AllowListSecurityProfile):
         ('GET', 'api-v1:event.settings'),
         ('POST', 'api-v1:upload'),
         ('POST', 'api-v1:checkinrpc.redeem'),
+        ('POST', 'api-v1:checkinrpc.annull'),
         ('GET', 'api-v1:checkinrpc.search'),
     )
 
@@ -180,6 +184,7 @@ class PretixScanNoSyncSecurityProfile(AllowListSecurityProfile):
         ('GET', 'api-v1:event.settings'),
         ('POST', 'api-v1:upload'),
         ('POST', 'api-v1:checkinrpc.redeem'),
+        ('POST', 'api-v1:checkinrpc.annull'),
         ('GET', 'api-v1:checkinrpc.search'),
     )
 

src/pretix/api/serializers/__init__.py

@@ -20,6 +20,7 @@
 # <https://www.gnu.org/licenses/>.
 #
 import json
+import re
 
 from django.db.models import prefetch_related_objects
 from rest_framework import serializers
@@ -135,3 +136,30 @@ class SalesChannelMigrationMixin:
         else:
             value["sales_channels"] = value["limit_sales_channels"]
         return value
+
+
+class CompatDecimalField(serializers.DecimalField):
+    """
+    Historically, pretix recorded tax rates as decimals with two places. Today, pretix supports tax rates with up to
+    four places. Since our API outputs decimals with the stored precision, this would have changed the API output from
+    "19.00" to "19.0000" without warning. While this is semantically the same thing, we need to assume some pretix API
+    users might run into trouble, either because they treat the value as a string and then map something
+    (e.g. ``if tax_rate == "19.00"``) or process it with a language where this is a significant difference. For example,
+    while in Python ``Decimal("19.00") == Decimal("19.0000")`` is true, in Java
+    ``(new BigDecimal("19.00")).equals(new BigDecimal("19.0000"))`` is false and only
+    ``(new BigDecimal("19.00")).compareTo(new BigDecimal("19.0000")) == 0`` is true.
+
+    Therefore, we stay backwards compatible by outputting two decimal places *as long as the trailing digits are zero-valued.
+    """
+
+    regex = re.compile(r"^([0-9]+\.[0-9]{2})0+$")
+
+    def to_representation(self, value):
+        if self.localize:
+            raise ValueError("localization not supported")
+        value = super().to_representation(value)
+        if value and "." not in value:
+            return f"{value}.00"
+        if m := self.regex.match(value):
+            return m.group(1)
+        return value

src/pretix/api/serializers/checkin.py

@@ -88,11 +88,19 @@ class CheckinRPCRedeemInputSerializer(serializers.Serializer):
     nonce = serializers.CharField(required=False, allow_null=True)
     datetime = serializers.DateTimeField(required=False, allow_null=True)
     answers = serializers.JSONField(required=False, allow_null=True)
+    exchange_medium_type = serializers.ChoiceField(required=False, choices=MEDIA_TYPES)
+    exchange_medium_identifier = serializers.CharField(required=False)
 
     def __init__(self, *args, **kwargs):
         super().__init__(*args, **kwargs)
         self.fields['lists'].child_relation.queryset = CheckinList.objects.filter(event__in=self.context['events']).select_related('event')
 
+    def validate(self, attrs):
+        exchange_fields = ["exchange_medium_type", "exchange_medium_identifier"]
+        if any(attrs.get(k) is None for k in exchange_fields) and not all(attrs.get(k) is None for k in exchange_fields):
+            raise ValidationError("If you set any of exchange_medium_type or exchange_medium_identifier, you need to set both of them.")
+        return attrs
+
 
 class MiniCheckinListSerializer(I18nAwareModelSerializer):
     event = serializers.SlugRelatedField(slug_field='slug', read_only=True)

src/pretix/api/serializers/event.py

@@ -48,7 +48,7 @@ from rest_framework.fields import ChoiceField, Field
 from rest_framework.relations import SlugRelatedField
 
 from pretix.api.serializers import (
-    CompatibleJSONField, SalesChannelMigrationMixin,
+    CompatDecimalField, CompatibleJSONField, SalesChannelMigrationMixin,
 )
 from pretix.api.serializers.fields import PluginsField
 from pretix.api.serializers.i18n import I18nAwareModelSerializer
@@ -73,7 +73,7 @@ from pretix.base.settings import (
     LazyI18nStringList, validate_event_settings,
 )
 from pretix.base.signals import api_event_settings_fields
-from pretix.multidomain.urlreverse import build_absolute_uri
+from pretix.multidomain.urlreverse import eventreverse_absolute
 
 logger = logging.getLogger(__name__)
 
@@ -173,7 +173,7 @@ class EventSerializer(SalesChannelMigrationMixin, I18nAwareModelSerializer):
     )
 
     def get_event_url(self, event):
-        return build_absolute_uri(event, 'presale:event.index')
+        return eventreverse_absolute(event, 'presale:event.index')
 
     class Meta:
         model = Event
@@ -681,6 +681,7 @@ class TaxRuleSerializer(CountryFieldMixin, I18nAwareModelSerializer):
         required=False,
         allow_null=True,
     )
+    rate = CompatDecimalField(max_digits=7, decimal_places=4)
 
     class Meta:
         model = TaxRule
@@ -747,6 +748,7 @@ class EventSettingsSerializer(SettingsSerializer):
         'max_items_per_order',
         'reservation_time',
         'contact_mail',
+        'contact_url',
         'show_variations_expanded',
         'hide_sold_out',
         'meta_noindex',
@@ -871,6 +873,7 @@ class EventSettingsSerializer(SettingsSerializer):
         'og_image',
         'name_scheme',
         'reusable_media_active',
+        'reusable_media_usage_enforced',
         'reusable_media_type_barcode',
         'reusable_media_type_barcode_identifier_length',
         'reusable_media_type_nfc_uid',
@@ -885,6 +888,7 @@ class EventSettingsSerializer(SettingsSerializer):
     readonly_fields = [
         # These are read-only since they are currently only settable on organizers, not events
         'reusable_media_active',
+        'reusable_media_usage_enforced',
         'reusable_media_type_barcode',
         'reusable_media_type_barcode_identifier_length',
         'reusable_media_type_nfc_uid',
@@ -970,6 +974,7 @@ class DeviceEventSettingsSerializer(EventSettingsSerializer):
         'reusable_media_type_nfc_uid',
         'reusable_media_type_nfc_mf0aes',
         'reusable_media_type_nfc_mf0aes_random_uid',
+        'reusable_media_usage_enforced',
         'system_question_order',
         'tax_rule_payment',
         'tax_rule_cancellation',

src/pretix/api/serializers/exporters.py

@@ -133,37 +133,43 @@ class JobRunSerializer(serializers.Serializer):
         return not bool(self._errors)
 
 
+class ExportFormDataField(serializers.Field):
+    def get_attribute(self, instance):
+        return (instance.export_identifier, instance.export_form_data)
+
+    def to_representation(self, value):
+        export_identifier, export_form_data = value
+        exporter = self.context['exporters'].get(export_identifier)
+        if exporter:
+            return JobRunSerializer(exporter=exporter).to_representation(export_form_data)
+        else:
+            return export_form_data
+
+    def get_value(self, dictionary):
+        return dictionary
+
+    def to_internal_value(self, data):
+        if "export_form_data" in data:
+            identifier = data.get('export_identifier', self.parent.instance.export_identifier if self.parent.instance else None)
+            exporter = self.context['exporters'].get(identifier)
+            if exporter:
+                return JobRunSerializer(exporter=exporter).to_internal_value(data["export_form_data"])
+            else:
+                return data['export_form_data']
+
+
 class ScheduledExportSerializer(serializers.ModelSerializer):
     schedule_next_run = serializers.DateTimeField(read_only=True)
     export_identifier = serializers.ChoiceField(choices=[])
     locale = serializers.ChoiceField(choices=settings.LANGUAGES, default='en')
     owner = serializers.SlugRelatedField(slug_field='email', read_only=True)
     error_counter = serializers.IntegerField(read_only=True)
+    export_form_data = ExportFormDataField()
 
     def __init__(self, *args, **kwargs):
         super().__init__(*args, **kwargs)
         self.fields['export_identifier'].choices = [(e, e) for e in self.context['exporters']]
 
-    def validate(self, attrs):
-        if attrs.get("export_form_data"):
-            identifier = attrs.get('export_identifier', self.instance.export_identifier if self.instance else None)
-            exporter = self.context['exporters'].get(identifier)
-            if exporter:
-                try:
-                    attrs["export_form_data"] = JobRunSerializer(exporter=exporter).to_internal_value(attrs["export_form_data"])
-                except ValidationError as e:
-                    raise ValidationError({"export_form_data": e.detail})
-            else:
-                raise ValidationError({"export_identifier": ["Unknown exporter."]})
-        return attrs
-
-    def to_representation(self, instance):
-        repr = super().to_representation(instance)
-        exporter = self.context['exporters'].get(instance.export_identifier)
-        if exporter:
-            repr["export_form_data"] = JobRunSerializer(exporter=exporter).to_representation(repr["export_form_data"])
-        return repr
-
     def validate_mail_additional_recipients(self, value):
         d = value.replace(' ', '')
         if len(d.split(',')) > 25:

src/pretix/api/serializers/fields.py

@@ -115,10 +115,10 @@ class PluginsField(serializers.Field):
 
     def to_representation(self, obj):
         from pretix.base.plugins import get_all_plugins
-
+        active_plugins = set(obj.get_plugins())
         return sorted([
             p.module for p in get_all_plugins()
-            if not p.name.startswith('.') and getattr(p, 'visible', True) and p.module in obj.get_plugins()
+            if not p.name.startswith('.') and getattr(p, 'visible', True) and p.module in active_plugins
         ])
 
     def to_internal_value(self, data):

src/pretix/api/serializers/forms.py

@@ -45,6 +45,12 @@ class PrimaryKeyRelatedField(serializers.PrimaryKeyRelatedField):
             return value
         return super().to_representation(value)
 
+    def to_internal_value(self, data):
+        value = super().to_internal_value(data)
+        if value is not None:
+            return value.pk
+        return value
+
 
 class FormFieldWrapperField(serializers.Field):
     def __init__(self, *args, **kwargs):

src/pretix/api/serializers/item.py

@@ -42,7 +42,9 @@ from django.utils.functional import cached_property, lazy
 from django.utils.translation import gettext_lazy as _
 from rest_framework import serializers
 
-from pretix.api.serializers import SalesChannelMigrationMixin
+from pretix.api.serializers import (
+    CompatDecimalField, SalesChannelMigrationMixin,
+)
 from pretix.api.serializers.event import MetaDataField
 from pretix.api.serializers.fields import UploadedFileField
 from pretix.api.serializers.i18n import I18nAwareModelSerializer
@@ -191,7 +193,7 @@ class InlineItemAddOnSerializer(serializers.ModelSerializer):
 class InlineItemProgramTimeSerializer(serializers.ModelSerializer):
     class Meta:
         model = ItemProgramTime
-        fields = ('start', 'end')
+        fields = ('start', 'end', 'location')
 
 
 class ItemBundleSerializer(serializers.ModelSerializer):
@@ -222,7 +224,7 @@ class ItemBundleSerializer(serializers.ModelSerializer):
 class ItemProgramTimeSerializer(serializers.ModelSerializer):
     class Meta:
         model = ItemProgramTime
-        fields = ('id', 'start', 'end')
+        fields = ('id', 'start', 'end', 'location')
 
     def validate(self, data):
         data = super().validate(data)
@@ -276,10 +278,10 @@ class ItemAddOnSerializer(serializers.ModelSerializer):
         return value
 
 
-class ItemTaxRateField(serializers.Field):
+class ItemTaxRateField(CompatDecimalField):
     def to_representation(self, i):
         if i.tax_rule:
-            return str(Decimal(i.tax_rule.rate))
+            return super().to_representation(Decimal(i.tax_rule.rate))
         else:
             return str(Decimal('0.00'))
 
@@ -289,7 +291,7 @@ class ItemSerializer(SalesChannelMigrationMixin, I18nAwareModelSerializer):
     bundles = InlineItemBundleSerializer(many=True, required=False)
     variations = InlineItemVariationSerializer(many=True, required=False)
     program_times = InlineItemProgramTimeSerializer(many=True, required=False)
-    tax_rate = ItemTaxRateField(source='*', read_only=True)
+    tax_rate = ItemTaxRateField(source='*', read_only=True, max_digits=7, decimal_places=4)
     meta_data = MetaDataField(required=False, source='*')
     picture = UploadedFileField(required=False, allow_null=True, allowed_types=(
         'image/png', 'image/jpeg', 'image/gif'

src/pretix/api/serializers/media.py

@@ -66,13 +66,14 @@ class ReusableMediaSerializer(I18nAwareModelSerializer):
 
     def __init__(self, *args, **kwargs):
         super().__init__(*args, **kwargs)
+        expand_nested = self.context['request'].query_params.getlist('expand')
 
-        if 'linked_giftcard' in self.context['request'].query_params.getlist('expand'):
+        if 'linked_giftcard' in expand_nested:
             if not self.context["can_read_giftcards"]:
                 raise PermissionDenied("No permission to access gift card details.")
 
             self.fields['linked_giftcard'] = NestedGiftCardSerializer(read_only=True, context=self.context)
-            if 'linked_giftcard.owner_ticket' in self.context['request'].query_params.getlist('expand'):
+            if 'linked_giftcard.owner_ticket' in expand_nested:
                 self.fields['linked_giftcard'].fields['owner_ticket'] = NestedOrderPositionSerializer(read_only=True, context=self.context)
         else:
             self.fields['linked_giftcard'] = serializers.PrimaryKeyRelatedField(
@@ -81,17 +82,27 @@ class ReusableMediaSerializer(I18nAwareModelSerializer):
                 queryset=self.context['organizer'].issued_gift_cards.all()
             )
 
-        if 'linked_orderposition' in self.context['request'].query_params.getlist('expand'):
-            # Permission Check performed in to_representation
-            self.fields['linked_orderposition'] = NestedOrderPositionSerializer(read_only=True)
+        # keep linked_orderposition (singular) for backwards compatibility, will be overwritten in self.validate
+        self.fields['linked_orderposition'] = serializers.PrimaryKeyRelatedField(
+            required=False,
+            allow_null=True,
+            queryset=OrderPosition.all.filter(order__event__organizer=self.context['organizer']),
+        )
+
+        if 'linked_orderposition' in expand_nested or 'linked_orderpositions' in expand_nested:
+            self.fields['linked_orderpositions'] = NestedOrderPositionSerializer(
+                many=True,
+                read_only=True
+            )
         else:
-            self.fields['linked_orderposition'] = serializers.PrimaryKeyRelatedField(
+            self.fields['linked_orderpositions'] = serializers.PrimaryKeyRelatedField(
+                many=True,
                 required=False,
                 allow_null=True,
                 queryset=OrderPosition.all.filter(order__event__organizer=self.context['organizer']),
             )
 
-        if 'customer' in self.context['request'].query_params.getlist('expand'):
+        if 'customer' in expand_nested:
             if not self.context["can_read_customers"]:
                 raise PermissionDenied("No permission to access customer details.")
 
@@ -106,6 +117,21 @@ class ReusableMediaSerializer(I18nAwareModelSerializer):
 
     def validate(self, data):
         data = super().validate(data)
+        if 'linked_orderposition' in data:
+            linked_orderposition = data['linked_orderposition']
+            # backwards-compatibility
+            if 'linked_orderpositions' in data:
+                raise ValidationError({
+                    'linked_orderposition': 'You cannot use linked_orderposition and linked_orderpositions at the same time.'
+                })
+            if self.instance and self.instance.linked_orderpositions.count() > 1:
+                raise ValidationError({
+                    'linked_orderposition': 'There are more than one linked_orderposition. You need to use linked_orderpositions.'
+                })
+
+            data['linked_orderpositions'] = [linked_orderposition] if linked_orderposition else []
+            del data['linked_orderposition']
+
         if 'type' in data and 'identifier' in data:
             qs = self.context['organizer'].reusable_media.filter(
                 identifier=data['identifier'], type=data['type']
@@ -121,14 +147,28 @@ class ReusableMediaSerializer(I18nAwareModelSerializer):
     def to_representation(self, instance):
         r = super().to_representation(instance)
         request = self.context.get('request')
+
+        ops = r.get('linked_orderpositions', [])
         # late permission evaluations for checks that depend on the actual linked events
         expand_nested = self.context['request'].query_params.getlist('expand')
         perm_holder = request.auth if isinstance(request.auth, (Device, TeamAPIToken)) else request.user
-        if 'linked_orderposition' in expand_nested:
-            if instance.linked_orderposition is not None:
-                event = instance.linked_orderposition.order.event
+        if ops and 'linked_orderposition' in expand_nested or 'linked_orderpositions' in expand_nested:
+            ops_noperm = []
+            for lop in instance.linked_orderpositions.all():
+                event = lop.order.event
                 if not perm_holder.has_event_permission(event.organizer, event, 'event.orders:read', request):
-                    r['linked_orderposition'] = {'id': instance.linked_orderposition.id}
+                    ops_noperm.append(lop.id)
+            if ops_noperm:
+                ops = [
+                    {'id': op['id']} if op['id'] in ops_noperm
+                    else op
+                    for op in ops
+                ]
+                r['linked_orderpositions'] = ops
+
+        # add linked_orderposition (singular) for backwards compatibility
+        if len(ops) < 2:
+            r['linked_orderposition'] = ops[0] if ops else None
 
         if 'linked_giftcard.owner_ticket' in expand_nested:
             gc = instance.linked_giftcard
@@ -148,10 +188,12 @@ class ReusableMediaSerializer(I18nAwareModelSerializer):
             'updated',
             'type',
             'identifier',
+            'claim_token',
+            'label',
             'active',
             'expires',
             'customer',
-            'linked_orderposition',
+            'linked_orderpositions',
             'linked_giftcard',
             'info',
             'notes',

src/pretix/api/serializers/order.py

@@ -41,7 +41,7 @@ from rest_framework.exceptions import ValidationError
 from rest_framework.relations import SlugRelatedField
 from rest_framework.reverse import reverse
 
-from pretix.api.serializers import CompatibleJSONField
+from pretix.api.serializers import CompatDecimalField, CompatibleJSONField
 from pretix.api.serializers.event import SubEventSerializer
 from pretix.api.serializers.forms import form_field_to_serializer_field
 from pretix.api.serializers.i18n import I18nAwareModelSerializer
@@ -52,6 +52,7 @@ from pretix.api.signals import order_api_details, orderposition_api_details
 from pretix.base.decimal import round_decimal
 from pretix.base.i18n import language
 from pretix.base.invoicing.transmission import get_transmission_types
+from pretix.base.media import MEDIA_TYPES
 from pretix.base.models import (
     CachedFile, Checkin, Customer, Device, GiftCard, Invoice, InvoiceAddress,
     InvoiceLine, Item, ItemVariation, Order, OrderPosition, Question,
@@ -76,7 +77,7 @@ from pretix.base.settings import (
 )
 from pretix.base.signals import register_ticket_outputs
 from pretix.helpers.countries import CachedCountries
-from pretix.multidomain.urlreverse import build_absolute_uri
+from pretix.multidomain.urlreverse import eventreverse_absolute
 
 logger = logging.getLogger(__name__)
 
@@ -381,6 +382,7 @@ class PrintLogSerializer(serializers.ModelSerializer):
 class FailedCheckinSerializer(I18nAwareModelSerializer):
     error_reason = serializers.ChoiceField(choices=Checkin.REASONS, required=True, allow_null=False)
     raw_barcode = serializers.CharField(required=True, allow_null=False)
+    raw_source_type = serializers.ChoiceField(choices=[(k, v) for k, v in MEDIA_TYPES.items()], default='barcode')
     position = serializers.PrimaryKeyRelatedField(queryset=OrderPosition.all.none(), required=False, allow_null=True)
     raw_item = serializers.PrimaryKeyRelatedField(queryset=Item.objects.none(), required=False, allow_null=True)
     raw_variation = serializers.PrimaryKeyRelatedField(queryset=ItemVariation.objects.none(), required=False, allow_null=True)
@@ -390,7 +392,7 @@ class FailedCheckinSerializer(I18nAwareModelSerializer):
     class Meta:
         model = Checkin
         fields = ('error_reason', 'error_explanation', 'raw_barcode', 'raw_item', 'raw_variation',
-                  'raw_subevent', 'nonce', 'datetime', 'type', 'position')
+                  'raw_subevent', 'raw_source_type', 'nonce', 'datetime', 'type', 'position')
 
     def __init__(self, *args, **kwargs):
         super().__init__(*args, **kwargs)
@@ -591,6 +593,7 @@ class OrderPositionSerializer(I18nAwareModelSerializer):
     country = CompatibleCountryField(source='*')
     attendee_name = serializers.CharField(required=False)
     plugin_data = OrderPositionPluginDataField(source='*', allow_null=True, read_only=True)
+    tax_rate = CompatDecimalField(max_digits=7, decimal_places=4)
 
     class Meta:
         list_serializer_class = OrderPositionListSerializer
@@ -747,6 +750,8 @@ class OrderPaymentDateField(serializers.DateField):
 
 
 class OrderFeeSerializer(I18nAwareModelSerializer):
+    tax_rate = CompatDecimalField(max_digits=7, decimal_places=4)
+
     class Meta:
         model = OrderFee
         fields = ('id', 'fee_type', 'value', 'description', 'internal_type', 'tax_rate', 'tax_value', 'tax_rule',
@@ -757,7 +762,7 @@ class PaymentURLField(serializers.URLField):
     def to_representation(self, instance: OrderPayment):
         if instance.state != OrderPayment.PAYMENT_STATE_CREATED:
             return None
-        return build_absolute_uri(instance.order.event, 'presale:event.order.pay', kwargs={
+        return eventreverse_absolute(instance.order.event, 'presale:event.order.pay', kwargs={
             'order': instance.order.code,
             'secret': instance.order.secret,
             'payment': instance.pk,
@@ -806,7 +811,7 @@ class OrderRefundSerializer(I18nAwareModelSerializer):
 
 class OrderURLField(serializers.URLField):
     def to_representation(self, instance: Order):
-        return build_absolute_uri(instance.event, 'presale:event.order', kwargs={
+        return eventreverse_absolute(instance.event, 'presale:event.order', kwargs={
             'order': instance.code,
             'secret': instance.secret,
         })
@@ -1149,6 +1154,7 @@ class OrderPositionCreateSerializer(I18nAwareModelSerializer):
             raise ValidationError(
                 {'discount': ['You can only specify a discount if you do the price computation, but price is not set.']}
             )
+
         return data
 
 
@@ -1416,6 +1422,7 @@ class OrderCreateSerializer(I18nAwareModelSerializer):
         qa = QuotaAvailability()
         qa.queue(*[q for q, d in quota_diff_for_locking.items() if d > 0])
         qa.compute()
+        v_avail = {}
 
         # These are not technically correct as diff use due to the time offset applied above, so let's prevent accidental
         # use further down
@@ -1445,11 +1452,13 @@ class OrderCreateSerializer(I18nAwareModelSerializer):
 
                 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]:
+                    if v not in v_avail:
+                        v.refresh_from_db(fields=['redeemed'])
+                        redeemed_in_carts = CartPosition.objects.filter(
+                            Q(voucher=v) & Q(event=self.context['event']) & Q(expires__gte=now_dt)
+                        ).exclude(pk__in=[cp.pk for cp in delete_cps])
+                        v_avail[v] = v.max_usages - v.redeemed - redeemed_in_carts.count()
+                    if v_avail[v] < voucher_usage[v]:
                         errs[i]['voucher'] = [
                             'The voucher has already been used the maximum number of times.'
                         ]
@@ -1585,7 +1594,7 @@ class OrderCreateSerializer(I18nAwareModelSerializer):
                 pos_data['attendee_name_parts'] = {
                     '_legacy': attendee_name
                 }
-            pos = OrderPosition(**{k: v for k, v in pos_data.items() if k != 'answers' and k != '_quotas' and k != 'use_reusable_medium'})
+            pos = OrderPosition(**{k: v for k, v in pos_data.items() if k not in ('answers', '_quotas', 'use_reusable_medium')})
             if simulate:
                 pos.order = order._wrapped
             else:
@@ -1700,15 +1709,25 @@ class OrderCreateSerializer(I18nAwareModelSerializer):
                         answ.options.add(*options)
 
                 if use_reusable_medium:
-                    use_reusable_medium.linked_orderposition = pos
-                    use_reusable_medium.save(update_fields=['linked_orderposition'])
+                    if pos.item.media_policy not in (Item.MEDIA_POLICY_APPEND, Item.MEDIA_POLICY_APPEND_OR_NEW):
+                        for op_pk in use_reusable_medium.linked_orderpositions.values_list('pk', flat=True):
+                            use_reusable_medium.log_action(
+                                'pretix.reusable_medium.linked_orderposition.removed',
+                                data={
+                                    'linked_orderposition': op_pk,
+                                }
+                            )
+                        use_reusable_medium.linked_orderpositions.set([pos])
+                    else:
+                        use_reusable_medium.linked_orderpositions.add(pos)
                     use_reusable_medium.log_action(
-                        'pretix.reusable_medium.linked_orderposition.changed',
+                        'pretix.reusable_medium.linked_orderposition.added',
                         data={
                             'by_order': order.code,
                             'linked_orderposition': pos.pk,
                         }
                     )
+                    use_reusable_medium.touch()
 
         if not simulate:
             for cp in delete_cps:
@@ -1897,6 +1916,7 @@ class InlineInvoiceLineSerializer(I18nAwareModelSerializer):
     position = LinePositionField(read_only=True)
     event_date_from = serializers.DateTimeField(read_only=True, source="period_start")
     event_date_to = serializers.DateTimeField(read_only=True, source="period_end")
+    tax_rate = CompatDecimalField(max_digits=7, decimal_places=4)
 
     class Meta:
         model = InvoiceLine
@@ -1980,6 +2000,7 @@ class BlockedTicketSecretSerializer(I18nAwareModelSerializer):
 
 class TransactionSerializer(I18nAwareModelSerializer):
     order = serializers.SlugRelatedField(slug_field="code", read_only=True)
+    tax_rate = CompatDecimalField(max_digits=7, decimal_places=4)
 
     class Meta:
         model = Transaction

src/pretix/api/serializers/organizer.py

@@ -27,7 +27,7 @@ from django.core.exceptions import ObjectDoesNotExist
 from django.db import transaction
 from django.db.models import Q
 from django.utils.crypto import get_random_string
-from django.utils.translation import gettext_lazy as _
+from django.utils.translation import gettext, gettext_lazy as _
 from rest_framework import serializers
 from rest_framework.exceptions import ValidationError
 
@@ -58,8 +58,8 @@ from pretix.helpers.permission_migration import (
     OLD_TO_NEW_EVENT_COMPAT, OLD_TO_NEW_EVENT_MIGRATION,
     OLD_TO_NEW_ORGANIZER_COMPAT, OLD_TO_NEW_ORGANIZER_MIGRATION,
 )
-from pretix.helpers.urls import build_absolute_uri as build_global_uri
-from pretix.multidomain.urlreverse import build_absolute_uri
+from pretix.helpers.urls import mainreverse_absolute
+from pretix.multidomain.urlreverse import eventreverse_absolute
 
 logger = logging.getLogger(__name__)
 
@@ -71,7 +71,7 @@ class OrganizerSerializer(I18nAwareModelSerializer):
     slug = serializers.CharField(read_only=True)
 
     def get_organizer_url(self, organizer):
-        return build_absolute_uri(organizer, 'presale:organizer.index')
+        return eventreverse_absolute(organizer, 'presale:organizer.index')
 
     class Meta:
         model = Organizer
@@ -492,14 +492,16 @@ class TeamInviteSerializer(serializers.ModelSerializer):
     def _send_invite(self, instance):
         mail(
             instance.email,
-            _('Account invitation'),
+            gettext('You\'ve been invited to join %(organizer)s') % {
+                'organizer': self.context['organizer'].name,
+            },
             'pretixcontrol/email/invitation.txt',
             {
                 'instance': settings.PRETIX_INSTANCE_NAME,
                 'user': self,
                 'organizer': self.context['organizer'].name,
                 'team': instance.team.name,
-                'url': build_global_uri('control:auth.invite', kwargs={
+                'url': mainreverse_absolute('control:auth.invite', kwargs={
                     'token': instance.token
                 })
             },
@@ -574,6 +576,7 @@ class OrganizerSettingsSerializer(SettingsSerializer):
         'customer_accounts_require_login_for_order_access',
         'invoice_regenerate_allowed',
         'contact_mail',
+        'contact_url',
         'imprint_url',
         'organizer_info_text',
         'event_list_type',
@@ -605,6 +608,7 @@ class OrganizerSettingsSerializer(SettingsSerializer):
         'cookie_consent_dialog_button_yes',
         'cookie_consent_dialog_button_no',
         'reusable_media_active',
+        'reusable_media_usage_enforced',
         'reusable_media_type_barcode',
         'reusable_media_type_barcode_identifier_length',
         'reusable_media_type_nfc_uid',

src/pretix/api/views/checkin.py

@@ -69,8 +69,10 @@ from pretix.base.models import (
 from pretix.base.models.orders import PrintLog
 from pretix.base.permissions import AnyPermissionOf
 from pretix.base.services.checkin import (
-    CheckInError, RequiredQuestionsError, SQLLogic, perform_checkin,
+    CheckInError, RequiredMediaExchangeError, RequiredQuestionsError, SQLLogic,
+    perform_checkin,
 )
+from pretix.base.services.media import perform_media_exchange
 from pretix.base.signals import checkin_annulled
 from pretix.helpers import OF_SELF
 
@@ -454,7 +456,8 @@ def _checkin_list_position_queryset(checkinlists, ignore_status=False, ignore_pr
 
 def _redeem_process(*, checkinlists, raw_barcode, answers_data, datetime, force, checkin_type, ignore_unpaid, nonce,
                     untrusted_input, user, auth, expand, pdf_data, request, questions_supported, canceled_supported,
-                    source_type='barcode', legacy_url_support=False, simulate=False, gate=None, use_order_locale=False):
+                    source_type='barcode', legacy_url_support=False, simulate=False, gate=None, use_order_locale=False,
+                    exchange_medium_type=None, exchange_medium_identifier=None):
     if not checkinlists:
         raise ValidationError('No check-in list passed.')
 
@@ -463,6 +466,7 @@ def _redeem_process(*, checkinlists, raw_barcode, answers_data, datetime, force,
 
     device = auth if isinstance(auth, Device) else None
     gate = gate or (auth.gate if isinstance(auth, Device) else None)
+    medium = None
 
     context = {
         'request': request,
@@ -491,6 +495,7 @@ def _redeem_process(*, checkinlists, raw_barcode, answers_data, datetime, force,
     )
     raw_barcode_for_checkin = None
     from_revoked_secret = False
+    reusable_medium_used = None
     if simulate:
         common_checkin_args['__fake_arg_to_prevent_this_from_being_saved'] = True
 
@@ -521,11 +526,12 @@ def _redeem_process(*, checkinlists, raw_barcode, answers_data, datetime, force,
     #    with respecting the force option), or it's a reusable medium (-> proceed with that)
     if not op_candidates:
         try:
-            media = ReusableMedium.objects.select_related('linked_orderposition').active().get(
+            medium = ReusableMedium.objects.active().filter(
+                Exists(ReusableMedium.linked_orderpositions.through.objects.filter(reusablemedium_id=OuterRef('pk')))
+            ).get(
                 organizer_id=checkinlists[0].event.organizer_id,
                 type=source_type,
                 identifier=raw_barcode,
-                linked_orderposition__isnull=False,
             )
             raw_barcode_for_checkin = raw_barcode
         except ReusableMedium.DoesNotExist:
@@ -628,7 +634,9 @@ def _redeem_process(*, checkinlists, raw_barcode, answers_data, datetime, force,
                     'list': MiniCheckinListSerializer(list_by_event[revoked_matches[0].event_id]).data,
                 }, status=400)
         else:
-            if media.linked_orderposition.order.event_id not in list_by_event:
+            linked_ops = medium.linked_orderpositions.all().select_related("order").prefetch_related("addons")
+            linked_event_ids = {op.order.event_id for op in linked_ops}
+            if not any(event_id in list_by_event for event_id in linked_event_ids):
                 # Medium exists but connected ticket is for the wrong event
                 if not simulate:
                     checkinlists[0].event.log_action('pretix.event.checkin.unknown', data={
@@ -654,28 +662,91 @@ def _redeem_process(*, checkinlists, raw_barcode, answers_data, datetime, force,
                     'checkin_texts': [],
                     'list': MiniCheckinListSerializer(checkinlists[0]).data,
                 }, status=404)
-            op_candidates = [media.linked_orderposition]
-            if list_by_event[media.linked_orderposition.order.event_id].addon_match:
-                op_candidates += list(media.linked_orderposition.addons.all())
+            op_candidates = []
+            for op in linked_ops:
+                if op.order.event_id in list_by_event:
+                    reusable_medium_used = medium
+                    op_candidates.append(op)
+                    if list_by_event[op.order.event_id].addon_match:
+                        op_candidates += list(op.addons.all())
 
     # 3. Handle the "multiple options found" case: Except for the unlikely case of a secret being also a valid primary
-    #    key on the same list, we're probably dealing with the ``addon_match`` case here and need to figure out
-    #    which add-on has the right product.
+    #    key on the same list, we're probably dealing with multiple linked_orderpositions or the ``addon_match`` case
+    #    here and need to figure out which op has the right product. This basically is a valid-for-checkin-test on every op.
     if len(op_candidates) > 1:
-        op_candidates_matching_product = [
-            op for op in op_candidates
-            if (
-                (list_by_event[op.order.event_id].addon_match or op.secret == raw_barcode or legacy_url_support) and
-                (list_by_event[op.order.event_id].all_products or op.item_id in {i.pk for i in list_by_event[op.order.event_id].limit_products.all()})
-            )
-        ]
 
-        if len(op_candidates_matching_product) == 0:
-            # None of the found add-ons has the correct product, too bad! We could just error out here, but
+        if not reusable_medium_used:
+            # 3a. First, we clean up that we made an imprecise query above. If a scan is made for multiple check-in lists,
+            # we have queried ``addon_to__secret=raw_barcode``, even if some of the lists in question do not allow addon
+            # matching. So we accept all candidates that match one of these cases:
+            # - Exactly the ticket secret we scanned (because that's always a possible result)
+            # - Exactly the ticket pk we scanned (on legacy endpoints)
+            # - An add-on on a list that allows add-on matching
+            # This is not necessary when a reusable media was used, since in that case we already obeyed list.addon_match
+            # correctly above.
+            op_candidates_filtered = [
+                op for op in op_candidates
+                if (
+                    op.secret == raw_barcode or
+                    list_by_event[op.order.event_id].addon_match or
+                    (str(op.pk) == raw_barcode and legacy_url_support and not untrusted_input)
+                )
+            ]
+        else:
+            op_candidates_filtered = op_candidates
+
+        if len(op_candidates_filtered) > 1:
+            # 3b. If we still have multiple candidates, we filter by product based on the check-in list configuration.
+            # This is relevant for the addon_match scenario where the scanned ticket has multiple add-ons, but only
+            # one is contained in the check-in list used to scan. It makes sense to filter this first, since it is a
+            # "static" check, i.e. scanning the same QR code on the same check-in list will always do the same, no matter
+            # when I scan it, and it is "intentional" filtering in the sense that the admin configured this behaviour
+            # into the check-in list.
+            op_candidates_filtered = [
+                op for op in op_candidates_filtered
+                if list_by_event[op.order.event_id].all_products or op.item_id in {i.pk for i in list_by_event[op.order.event_id].limit_products.all()}
+            ]
+
+        if len(op_candidates_filtered) > 1:
+            # 3c. If we still have multiple candidates, we filter by validity date. This was introduced for the case where
+            # a reusable media refers to two tickets, one currently valid and one expired or in the future. Howeer,
+            # it could in theory also happen with two add-ons being on the same check-in list but without overlapping
+            # validity. It makes sense to filter this "after" the previous checks since it is not "intentional" filtering
+            # configured by the admin but "accidental" filtering that depends on the time of execution.
+            op_candidates_filtered = [
+                op for op in op_candidates_filtered
+                if (
+                    (not op.valid_from or op.valid_from <= datetime) and
+                    (not op.valid_until or op.valid_until > datetime)
+                )
+            ]
+
+        if len(op_candidates_filtered) == 0:
+            # None of the ops is valid today or has the correct product, too bad! We could just error out here, but
             # instead we just continue with *any* product and have it rejected by the check in perform_checkin.
-            # This has the advantage of a better error message.
-            op_candidates = [op_candidates[0]]
-        elif len(op_candidates_matching_product) > 1:
+            # To improve the error message, we select the op that will "work next" or - if none matches - "worked last".
+            op_candidate = None
+            for op in op_candidates:
+                if (
+                    op.valid_from and op.valid_from > datetime and
+                    (not op_candidate or op.valid_from < op_candidate.valid_from)
+                ):
+                    op_candidate = op
+
+            if not op_candidate:
+                # no candidate in the future, get closest in the past
+                for op in op_candidates:
+                    if (
+                        op.valid_until and op.valid_until < datetime and
+                        (not op_candidate or op.valid_until > op_candidate.valid_until)
+                    ):
+                        op_candidate = op
+
+            if not op_candidate:
+                op_candidate = op_candidates[0]
+
+            op_candidates = [op_candidate]
+        elif len(op_candidates_filtered) > 1:
             # It's still ambiguous, we'll error out.
             # We choose the first match (regardless of product) for the logging since it's most likely to be the
             # base product according to our order_by above.
@@ -709,7 +780,7 @@ def _redeem_process(*, checkinlists, raw_barcode, answers_data, datetime, force,
                 'list': MiniCheckinListSerializer(list_by_event[op.order.event_id]).data,
             }, status=400)
         else:
-            op_candidates = op_candidates_matching_product
+            op_candidates = op_candidates_filtered
 
     op = op_candidates[0]
     common_checkin_args['list'] = list_by_event[op.order.event_id]
@@ -721,7 +792,10 @@ def _redeem_process(*, checkinlists, raw_barcode, answers_data, datetime, force,
             if str(q.pk) in answers_data:
                 try:
                     if q.type == Question.TYPE_FILE:
-                        given_answers[q] = _handle_file_upload(answers_data[str(q.pk)], user, auth)
+                        if answers_data[str(q.pk)]:
+                            given_answers[q] = _handle_file_upload(answers_data[str(q.pk)], user, auth)
+                        else:
+                            given_answers[q] = None
                     else:
                         given_answers[q] = q.clean_answer(answers_data[str(q.pk)])
                 except (ValidationError, BaseValidationError):
@@ -734,7 +808,14 @@ def _redeem_process(*, checkinlists, raw_barcode, answers_data, datetime, force,
         locale = op.order.event.settings.locale
     with language(locale):
         try:
-            perform_checkin(
+            if exchange_medium_identifier and medium:
+                # Cannot scan a medium and then request to exchange it
+                raise CheckInError(
+                    gettext('You cannot exchange a medium for a medium.'),
+                    'error'
+                )
+
+            checkin_args = dict(
                 op=op,
                 clist=list_by_event[op.order.event_id],
                 given_answers=given_answers,
@@ -752,7 +833,25 @@ def _redeem_process(*, checkinlists, raw_barcode, answers_data, datetime, force,
                 from_revoked_secret=from_revoked_secret,
                 simulate=simulate,
                 gate=gate,
+                reusable_medium=medium,
             )
+
+            if exchange_medium_identifier:  # other fields are filled, see CheckinRPCRedeemInputSerializer.validate
+                with transaction.atomic():
+                    # Do exchange and check-in atomically, i.e. both succeed or both fail
+                    medium = perform_media_exchange(
+                        organizer=request.organizer,
+                        media_type=exchange_medium_type,
+                        identifier=exchange_medium_identifier,
+                        link_orderposition=op,
+                        user=user,
+                        auth=auth,
+                    )
+                    source_type = medium.media_type.identifier
+                    checkin_args['reusable_medium'] = medium
+                    perform_checkin(**checkin_args)
+            else:
+                perform_checkin(**checkin_args)
         except RequiredQuestionsError as e:
             return Response({
                 'status': 'incomplete',
@@ -764,6 +863,18 @@ def _redeem_process(*, checkinlists, raw_barcode, answers_data, datetime, force,
                 ],
                 'list': MiniCheckinListSerializer(list_by_event[op.order.event_id]).data,
             }, status=400)
+        except RequiredMediaExchangeError as e:
+            return Response({
+                'status': 'exchange',
+                'require_attention': op.require_checkin_attention,
+                'checkin_texts': op.checkin_texts,
+                'position': CheckinListOrderPositionSerializer(op, context=_make_context(context, op.order.event)).data,
+                'media_policy': e.media_policy,
+                'media_type': e.media_type,
+                'list': MiniCheckinListSerializer(list_by_event[op.order.event_id]).data,
+                'reason': e.code,
+                'reason_explanation': e.msg,
+            }, status=400)
         except CheckInError as e:
             if not simulate:
                 op.order.log_action('pretix.event.checkin.denied', data={
@@ -951,6 +1062,8 @@ class CheckinRPCRedeemView(views.APIView):
             canceled_supported=True,
             request=self.request,  # this is not clean, but we need it in the serializers for URL generation
             legacy_url_support=False,
+            exchange_medium_type=s.validated_data.get('exchange_medium_type'),
+            exchange_medium_identifier=s.validated_data.get('exchange_medium_identifier'),
         )
 
 

src/pretix/api/views/media.py

@@ -53,10 +53,12 @@ with scopes_disabled():
         customer = django_filters.CharFilter(field_name='customer__identifier')
         updated_since = django_filters.IsoDateTimeFilter(field_name='updated', lookup_expr='gte')
         created_since = django_filters.IsoDateTimeFilter(field_name='created', lookup_expr='gte')
+        # backwards-compatible
+        linked_orderposition = django_filters.NumberFilter(field_name='linked_orderpositions__id')
 
         class Meta:
             model = ReusableMedium
-            fields = ['identifier', 'type', 'active', 'customer', 'linked_orderposition', 'linked_giftcard']
+            fields = ['identifier', 'type', 'active', 'customer', 'linked_orderpositions', 'linked_giftcard']
 
 
 class ReusableMediaViewSet(viewsets.ModelViewSet):
@@ -75,7 +77,7 @@ class ReusableMediaViewSet(viewsets.ModelViewSet):
         ).order_by().values('card').annotate(s=Sum('value')).values('s')
         return self.request.organizer.reusable_media.prefetch_related(
             Prefetch(
-                'linked_orderposition',
+                'linked_orderpositions',
                 queryset=OrderPosition.objects.select_related(
                     'order', 'order__event', 'order__event__organizer', 'seat',
                 ).prefetch_related(
@@ -117,14 +119,38 @@ class ReusableMediaViewSet(viewsets.ModelViewSet):
 
     @transaction.atomic()
     def perform_update(self, serializer):
-        ReusableMedium.objects.select_for_update(of=OF_SELF).get(pk=self.get_object().pk)
+        rm = ReusableMedium.objects.select_for_update(of=OF_SELF).get(pk=self.get_object().pk)
+        prev_linked_ops_pks = list(rm.linked_orderpositions.values_list("pk", flat=True))
         inst = serializer.save(identifier=serializer.instance.identifier, type=serializer.instance.type)
-        inst.log_action(
-            'pretix.reusable_medium.changed',
-            user=self.request.user,
-            auth=self.request.auth,
-            data=self.request.data,
-        )
+        linked_ops_pks = inst.linked_orderpositions.values_list("pk", flat=True)
+        for op_pk in prev_linked_ops_pks:
+            if op_pk not in linked_ops_pks:
+                inst.log_action(
+                    'pretix.reusable_medium.linked_orderposition.removed',
+                    user=self.request.user,
+                    auth=self.request.auth,
+                    data={
+                        'linked_orderposition': op_pk,
+                    }
+                )
+        for op_pk in linked_ops_pks:
+            if op_pk not in prev_linked_ops_pks:
+                inst.log_action(
+                    'pretix.reusable_medium.linked_orderposition.added',
+                    user=self.request.user,
+                    auth=self.request.auth,
+                    data={
+                        'linked_orderposition': op_pk,
+                    }
+                )
+        data = {k: v for k, v in self.request.data.items() if k not in ('linked_orderposition', 'linked_orderpositions')}
+        if data:
+            inst.log_action(
+                'pretix.reusable_medium.changed',
+                user=self.request.user,
+                auth=self.request.auth,
+                data=data,
+            )
         return inst
 
     def perform_destroy(self, instance):
@@ -157,7 +183,6 @@ class ReusableMediaViewSet(viewsets.ModelViewSet):
                         type=s.validated_data["type"],
                         identifier=s.validated_data["identifier"],
                     )
-                m.linked_orderposition = None  # not relevant for cross-organizer
                 m.customer = None  # not relevant for cross-organizer
                 s = self.get_serializer(m)
                 return Response({"result": s.data})
@@ -171,7 +196,7 @@ class ReusableMediaViewSet(viewsets.ModelViewSet):
 
             return Response({"result": None})
 
-    @scopes_disabled()  # we are sure enough that get_queryset() is correct, so we save some perforamnce
+    @scopes_disabled()  # we are sure enough that get_queryset() is correct, so we save some performance
     def list(self, request, **kwargs):
         date = serializers.DateTimeField().to_representation(now())
         queryset = self.filter_queryset(self.get_queryset())

src/pretix/api/views/order.py

@@ -194,7 +194,7 @@ with scopes_disabled():
                 )
             ).values('id')
 
-            matching_media = ReusableMedium.objects.filter(identifier=u).values_list('linked_orderposition__order_id', flat=True)
+            matching_media = ReusableMedium.objects.filter(identifier=u).values_list('linked_orderpositions__order_id', flat=True)
 
             mainq = (
                 code
@@ -1034,7 +1034,7 @@ with scopes_disabled():
         search = django_filters.CharFilter(method='search_qs')
 
         def search_qs(self, queryset, name, value):
-            matching_media = ReusableMedium.objects.filter(identifier=value).values_list('linked_orderposition', flat=True)
+            matching_media = ReusableMedium.objects.filter(identifier=value).values_list('linked_orderpositions', flat=True)
             return queryset.filter(
                 Q(secret__istartswith=value)
                 | Q(attendee_name_cached__icontains=value)
@@ -1658,6 +1658,7 @@ class PaymentViewSet(CreateModelMixin, viewsets.ReadOnlyModelViewSet):
                         count_waitinglist=False,
                         force=request.data.get('force', False),
                         send_mail=send_mail,
+                        ignore_date=request.data.get('force', False),
                     )
                 except Quota.QuotaExceededException:
                     pass
@@ -1693,7 +1694,8 @@ class PaymentViewSet(CreateModelMixin, viewsets.ReadOnlyModelViewSet):
                             auth=self.request.auth,
                             count_waitinglist=False,
                             send_mail=send_mail,
-                            force=force)
+                            force=force,
+                            ignore_date=force)
         except Quota.QuotaExceededException as e:
             return Response({'detail': str(e)}, status=status.HTTP_400_BAD_REQUEST)
         except PaymentException as e:

src/pretix/api/webhooks.py

@@ -408,6 +408,12 @@ def register_default_webhook_events(sender, **kwargs):
             _('This includes product added or deleted and changes to nested objects like '
               'variations or bundles.'),
         ),
+        ParametrizedItemWebhookEvent(
+            'pretix.event.quota.*',
+            _('Quota changed'),
+            _('This includes related events like creation, deletion, opening or closing of quotas. '
+              'No webhook is sent for changes to the resulting availability.'),
+        ),
         ParametrizedEventWebhookEvent(
             'pretix.event.live.activated',
             _('Shop taken live'),

src/pretix/base/context.py

@@ -23,6 +23,7 @@ import sys
 
 from django.conf import settings
 from django.urls import reverse
+from django.utils.html import escape, format_html
 from django.utils.safestring import mark_safe
 from django.utils.translation import gettext
 
@@ -35,21 +36,23 @@ def get_powered_by(request, safelink=True):
     d = gs.settings.license_check_input
     if d.get('poweredby_name'):
         if d.get('poweredby_url'):
-            msg = gettext('<a {a_name_attr}>powered by {name}</a> <a {a_attr}>based on pretix</a>').format(
+            msg = format_html(
+                gettext('<a {a_name_attr}>powered by {name}</a> <a {a_attr}>based on pretix</a>'),
                 name=d['poweredby_name'],
-                a_name_attr='href="{}" target="_blank" rel="noopener"'.format(
-                    sl(d['poweredby_url']) if safelink else d['poweredby_url'],
-                ),
-                a_attr='href="{}" target="_blank" rel="noopener"'.format(
+                a_name_attr=mark_safe('href="{}" target="_blank" rel="noopener"'.format(
+                    escape(sl(d['poweredby_url'])) if safelink else escape(d['poweredby_url']),
+                )),
+                a_attr=mark_safe('href="{}" target="_blank" rel="noopener"'.format(
                     sl('https://pretix.eu') if safelink else 'https://pretix.eu',
-                )
+                ))
             )
         else:
-            msg = gettext('<a {a_attr}>powered by {name} based on pretix</a>').format(
+            msg = format_html(
+                gettext('<a {a_attr}>powered by {name} based on pretix</a>'),
                 name=d['poweredby_name'],
-                a_attr='href="{}" target="_blank" rel="noopener"'.format(
+                a_attr=mark_safe('href="{}" target="_blank" rel="noopener"'.format(
                     sl('https://pretix.eu') if safelink else 'https://pretix.eu',
-                )
+                ))
             )
     else:
         msg = gettext('<a %(a_attr)s>ticketing powered by pretix</a>') % {

src/pretix/base/customersso/oidc.py

@@ -36,7 +36,7 @@ from django.core.exceptions import ValidationError
 from django.utils.translation import gettext_lazy as _
 from requests import RequestException
 
-from pretix.multidomain.urlreverse import build_absolute_uri
+from pretix.multidomain.urlreverse import eventreverse_absolute
 
 logger = logging.getLogger(__name__)
 
@@ -313,7 +313,7 @@ def _get_or_create_server_keypair(organizer):
 
 def generate_id_token(customer, client, auth_time, nonce, scope, expires: datetime, scope_claims=False, with_code=None, with_access_token=None):
     payload = {
-        'iss': build_absolute_uri(client.organizer, 'presale:organizer.index').rstrip('/'),
+        'iss': eventreverse_absolute(client.organizer, 'presale:organizer.index').rstrip('/'),
         'aud': client.client_id,
         'exp': int(expires.timestamp()),
         'iat': int(time.time()),

src/pretix/base/datasync/sourcefields.py

@@ -28,7 +28,7 @@ from django.utils.translation import gettext_lazy as _, pgettext_lazy
 
 from pretix.base.models import Checkin, InvoiceAddress, Order, Question
 from pretix.base.settings import PERSON_NAME_SCHEMES
-from pretix.multidomain.urlreverse import build_absolute_uri
+from pretix.multidomain.urlreverse import eventreverse_absolute
 
 
 def get_answer(op, question_identifier=None):
@@ -545,7 +545,7 @@ def get_data_fields(event, for_model=None):
                 _("Order link"),
                 Question.TYPE_STRING,
                 None,
-                lambda order: build_absolute_uri(
+                lambda order: eventreverse_absolute(
                     event,
                     'presale:event.order', kwargs={
                         'order': order.code,
@@ -560,7 +560,7 @@ def get_data_fields(event, for_model=None):
                 _("Ticket link"),
                 Question.TYPE_STRING,
                 None,
-                lambda op: build_absolute_uri(
+                lambda op: eventreverse_absolute(
                     event,
                     'presale:event.order.position', kwargs={
                         'order': op.order.code,

src/pretix/base/email.py

@@ -19,7 +19,6 @@
 # You should have received a copy of the GNU Affero General Public License along with this program.  If not, see
 # <https://www.gnu.org/licenses/>.
 #
-import ipaddress
 import logging
 import smtplib
 import socket
@@ -43,6 +42,7 @@ from pretix.base.templatetags.rich_text import (
     markdown_compile_email, truelink_callback,
 )
 from pretix.helpers.format import FormattedString, SafeFormatter, format_map
+from pretix.helpers.ssrf import should_block_access
 
 from pretix.base.services.placeholders import (  # noqa
     get_available_placeholders, PlaceholderContext
@@ -252,13 +252,9 @@ def create_connection(address, timeout=socket.getdefaulttimeout(),
         af, socktype, proto, canonname, sa = res
 
         if not getattr(settings, "MAIL_CUSTOM_SMTP_ALLOW_PRIVATE_NETWORKS", False):
-            ip_addr = ipaddress.ip_address(sa[0])
-            if ip_addr.is_multicast:
-                raise socket.error(f"Request to multicast address {sa[0]} blocked")
-            if ip_addr.is_loopback or ip_addr.is_link_local:
-                raise socket.error(f"Request to local address {sa[0]} blocked")
-            if ip_addr.is_private:
-                raise socket.error(f"Request to private address {sa[0]} blocked")
+            is_private, msg = should_block_access(sa)
+            if is_private:
+                raise socket.error(msg)
 
         sock = None
         try:

src/pretix/base/exporters/orderlist.py

@@ -68,7 +68,7 @@ from ...control.forms.filter import get_all_payment_providers
 from ...helpers import GroupConcat
 from ...helpers.iter import chunked_iterable
 from ...helpers.safe_openpyxl import remove_invalid_excel_chars
-from ...multidomain.urlreverse import build_absolute_uri
+from ...multidomain.urlreverse import eventreverse_absolute
 from ..exporter import (
     ListExporter, MultiSheetListExporter, OrganizerLevelExportMixin,
 )
@@ -160,7 +160,7 @@ class OrderListExporter(MultiSheetListExporter):
 
     def _get_all_payment_methods(self, qs):
         pps = dict(get_all_payment_providers())
-        return sorted([(pp, pps[pp]) for pp in set(
+        return sorted([(pp, pps.get(pp, pp)) for pp in set(
             OrderPayment.objects.exclude(provider='free').filter(order__event__in=self.events).values_list(
                 'provider', flat=True
             ).distinct()
@@ -330,6 +330,7 @@ class OrderListExporter(MultiSheetListExporter):
                 taxsum=Sum('tax_value'), grosssum=Sum('value')
             )
         }
+        payment_methods = None
         if form_data.get('include_payment_amounts'):
             payment_sum_cache = {
                 (o['order__id'], o['provider']): o['grosssum'] for o in
@@ -347,6 +348,7 @@ class OrderListExporter(MultiSheetListExporter):
                     grosssum=Sum('amount')
                 )
             }
+            payment_methods = self._get_all_payment_methods(qs)
         sum_cache = {
             (o['order__id'], o['tax_rate']): o for o in
             OrderPosition.objects.values('tax_rate', 'order__id').order_by().annotate(
@@ -427,14 +429,13 @@ class OrderListExporter(MultiSheetListExporter):
             ]))
 
             row.append(
-                build_absolute_uri(order.event, 'presale:event.order', kwargs={
+                eventreverse_absolute(order.event, 'presale:event.order', kwargs={
                     'order': order.code,
                     'secret': order.secret,
                 })
             )
 
             if form_data.get('include_payment_amounts'):
-                payment_methods = self._get_all_payment_methods(qs)
                 for id, vn in payment_methods:
                     row.append(
                         payment_sum_cache.get((order.id, id), Decimal('0.00')) -
@@ -854,7 +855,7 @@ class OrderListExporter(MultiSheetListExporter):
                 ]))
 
                 row.append(
-                    build_absolute_uri(order.event, 'presale:event.order.position', kwargs={
+                    eventreverse_absolute(order.event, 'presale:event.order.position', kwargs={
                         'order': order.code,
                         'secret': op.web_secret,
                         'position': op.positionid

src/pretix/base/exporters/reusablemedia.py

@@ -20,12 +20,13 @@
 # <https://www.gnu.org/licenses/>.
 #
 
+from django.db.models import Prefetch
 from django.dispatch import receiver
 from django.utils.formats import date_format
 from django.utils.translation import gettext_lazy as _, pgettext, pgettext_lazy
 
 from ..exporter import ListExporter, OrganizerLevelExportMixin
-from ..models import ReusableMedium
+from ..models import OrderPosition, ReusableMedium
 from ..signals import register_multievent_data_exporters
 
 
@@ -44,7 +45,9 @@ class ReusableMediaExporter(OrganizerLevelExportMixin, ListExporter):
         media = ReusableMedium.objects.filter(
             organizer=self.organizer,
         ).select_related(
-            'customer', 'linked_orderposition', 'linked_giftcard',
+            'customer', 'linked_giftcard',
+        ).prefetch_related(
+            Prefetch('linked_orderpositions', queryset=OrderPosition.objects.select_related("order"))
         ).order_by('created')
 
         headers = [
@@ -61,18 +64,23 @@ class ReusableMediaExporter(OrganizerLevelExportMixin, ListExporter):
         yield headers
         yield self.ProgressSetTotal(total=media.count())
 
+        can_read_giftcards = self.permission_holder.has_organizer_permission(self.organizer, 'organizer.giftcards:read')
+
         for medium in media.iterator(chunk_size=1000):
-            row = [
+            giftcard_secret = medium.linked_giftcard.secret if medium.linked_giftcard_id else ''
+            if giftcard_secret and not can_read_giftcards:
+                giftcard_secret = giftcard_secret[:3] + "…"
+
+            yield [
                 medium.type,
                 medium.identifier,
                 _('Yes') if medium.active else _('No'),
                 date_format(medium.expires, 'SHORT_DATETIME_FORMAT') if medium.expires else '',
                 medium.customer.identifier if medium.customer_id else '',
-                f"{medium.linked_orderposition.order.code}-{medium.linked_orderposition.positionid}" if medium.linked_orderposition_id else '',
-                medium.linked_giftcard.secret if medium.linked_giftcard_id else '',
+                ', '.join([f"{op.order.code}-{op.positionid}" for op in medium.linked_orderpositions.all()]),
+                giftcard_secret,
                 medium.notes,
             ]
-            yield row
 
     def get_filename(self):
         return f'{self.organizer.slug}_media'

src/pretix/base/forms/auth.py

@@ -33,8 +33,6 @@
 # distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 # License for the specific language governing permissions and limitations under the License.
 
-import hashlib
-import ipaddress
 import logging
 
 from django import forms
@@ -42,13 +40,12 @@ from django.conf import settings
 from django.contrib.auth.password_validation import (
     password_validators_help_texts, validate_password,
 )
-from django.utils.functional import cached_property
 from django.utils.translation import gettext_lazy as _
 
 from pretix.base.metrics import pretix_failed_logins
 from pretix.base.models import User
 from pretix.helpers.dicts import move_to_end
-from pretix.helpers.http import get_client_ip
+from pretix.helpers.ratelimit import rate_limit
 
 logger = logging.getLogger(__name__)
 
@@ -85,40 +82,20 @@ class LoginForm(forms.Form):
         else:
             move_to_end(self.fields, 'keep_logged_in')
 
-    @cached_property
-    def ratelimit_key(self):
-        if not settings.HAS_REDIS:
-            return None
-        client_ip = get_client_ip(self.request)
-        if not client_ip:
-            return None
-        try:
-            client_ip = ipaddress.ip_address(client_ip)
-        except ValueError:
-            # Web server not set up correctly
-            return None
-        if client_ip.is_private:
-            # This is the private IP of the server, web server not set up correctly
-            return None
-        return 'pretix_login_{}'.format(hashlib.sha1(str(client_ip).encode()).hexdigest())
-
     def clean(self):
         if all(k in self.cleaned_data for k, f in self.fields.items() if f.required):
-            if self.ratelimit_key:
-                from django_redis import get_redis_connection
-                rc = get_redis_connection("redis")
-                cnt = rc.get(self.ratelimit_key)
-                if cnt and int(cnt) > 10:
-                    pretix_failed_logins.inc(1, reason="ratelimit")
-                    logger.info("Backend login rejected due to rate limit.")
-                    raise forms.ValidationError(self.error_messages['rate_limit'], code='rate_limit')
+            rate_limit_kwargs = dict(include_ip_from_request=self.request, max_num=10, expire_time=300)
+            if rate_limit("login", **rate_limit_kwargs, increase=False):
+                # Check rate limit without counting up, we increase below only on failed logins
+                pretix_failed_logins.inc(1, reason="ratelimit")
+                logger.info("Backend login rejected due to rate limit.")
+                raise forms.ValidationError(self.error_messages['rate_limit'], code='rate_limit')
             self.user_cache = self.backend.form_authenticate(self.request, self.cleaned_data)
             if self.user_cache is None:
-                if self.ratelimit_key:
-                    rc.incr(self.ratelimit_key)
-                    rc.expire(self.ratelimit_key, 300)
                 logger.info("Backend login invalid.")
                 pretix_failed_logins.inc(1, reason="invalid")
+                # Count towards rate limit (result is ignored, we are checking above)
+                rate_limit("login", **rate_limit_kwargs)
                 raise forms.ValidationError(
                     self.error_messages['invalid_login'],
                     code='invalid_login'

src/pretix/base/forms/questions.py

@@ -35,6 +35,7 @@
 import copy
 import json
 import logging
+import re
 from datetime import timedelta
 from decimal import Decimal
 from io import BytesIO
@@ -47,13 +48,12 @@ from django.conf import settings
 from django.contrib import messages
 from django.core.exceptions import ValidationError
 from django.core.files.uploadedfile import SimpleUploadedFile
-from django.core.validators import (
-    MaxValueValidator, MinValueValidator, RegexValidator,
-)
+from django.core.validators import MaxValueValidator, MinValueValidator
 from django.db.models import QuerySet
 from django.forms import Select, widgets
 from django.forms.widgets import FILE_INPUT_CONTRADICTION
 from django.utils.formats import date_format
+from django.utils.functional import lazy
 from django.utils.html import escape
 from django.utils.safestring import mark_safe
 from django.utils.text import format_lazy
@@ -220,20 +220,6 @@ class NamePartsFormField(forms.MultiValueField):
         defaults = {
             'widget': self.widget,
             'max_length': kwargs.pop('max_length', None),
-            'validators': [
-                RegexValidator(
-                    # The following characters should never appear in a name anywhere of
-                    # the world. However, they commonly appear in inputs generated by spam
-                    # bots.
-                    r'^[^$€/%§{}<>~]*$',
-                    message=_('Please do not use special characters in names.')
-                ),
-                RegexValidator(
-                    URL_RE,
-                    inverse_match=True,
-                    message=_('Please do not use special characters in names.')
-                )
-            ]
         }
         self.max_length = defaults['max_length']
         self.scheme_name = kwargs.pop('scheme')
@@ -255,7 +241,6 @@ class NamePartsFormField(forms.MultiValueField):
             if fname == 'title' and self.scheme_titles:
                 d = dict(defaults)
                 d.pop('max_length', None)
-                d.pop('validators', None)
                 field = forms.ChoiceField(
                     **d,
                     choices=[('', '')] + [(d, d) for d in self.scheme_titles[1]]
@@ -264,7 +249,6 @@ class NamePartsFormField(forms.MultiValueField):
             elif fname == 'salutation':
                 d = dict(defaults)
                 d.pop('max_length', None)
-                d.pop('validators', None)
                 field = forms.ChoiceField(
                     **d,
                     choices=[
@@ -296,6 +280,37 @@ class NamePartsFormField(forms.MultiValueField):
         if sum(len(v) for v in value.values() if v) > (self.max_length or 250):
             raise forms.ValidationError(_('Please enter a shorter name.'), code='max_length')
 
+        for fname, label, size in self.scheme['fields']:
+            if fname == 'salutation' or (fname == 'title' and self.scheme_titles):
+                continue
+            v = value.get(fname)
+            if not v:
+                continue
+            special_chars = re.findall('[$€/%§{}<>~]', v)
+            if special_chars:
+                raise forms.ValidationError(
+                    _('The field "%(label)s" may not contain special characters such as "%(chars)s".'),
+                    code='name_special_chars',
+                    params={
+                        "label": label,
+                        "chars": "".join(special_chars),
+                    },
+                )
+            # URL_RE checks for valid domain names, including one special TLD med, which can be part of a title
+            if ".med" in v:
+                v = v.replace(".med", ". med")
+                value[fname] = v
+            url_matched = URL_RE.search(v)
+            if url_matched:
+                raise forms.ValidationError(
+                    _('The field "%(label)s" may not contain an URL (%(url)s).'),
+                    code='url_in_title',
+                    params={
+                        "label": label,
+                        "url": url_matched.group(0),
+                    }
+                )
+
         if value.get("salutation") == "empty":
             value["salutation"] = ""
 
@@ -310,16 +325,21 @@ class WrappedPhonePrefixSelect(Select):
     initial = None
 
     def __init__(self, initial=None):
-        choices = [("", "---------")]
+        def _get_choices():
+            choices = [("", "---------")]
+
+            if initial:
+                for prefix, values in COUNTRY_CODE_TO_REGION_CODE.items():
+                    if all(v == REGION_CODE_FOR_NON_GEO_ENTITY for v in values):
+                        continue
+                    if initial in values:
+                        self.initial = "+%d" % prefix
+                        break
+            choices += get_phone_prefixes_sorted_and_localized()
+            return choices
+
+        choices = lazy(_get_choices, list)()
 
-        if initial:
-            for prefix, values in COUNTRY_CODE_TO_REGION_CODE.items():
-                if all(v == REGION_CODE_FOR_NON_GEO_ENTITY for v in values):
-                    continue
-                if initial in values:
-                    self.initial = "+%d" % prefix
-                    break
-        choices += get_phone_prefixes_sorted_and_localized()
         super().__init__(choices=choices, attrs={
             'aria-label': pgettext_lazy('phonenumber', 'International area code'),
             'autocomplete': 'tel-country-code',
@@ -939,7 +959,7 @@ class BaseQuestionsForm(forms.Form):
                     label=label, required=required,
                     help_text=help_text,
                     initial=_initial,
-                    widget=TimePickerWidget(time_format=get_format_without_seconds('TIME_INPUT_FORMATS')),
+                    widget=TimePickerWidget(without_seconds=True),
                 )
             elif q.type == Question.TYPE_DATETIME:
                 if not help_text:
@@ -1096,6 +1116,13 @@ class BaseQuestionsForm(forms.Form):
             if q.dependency_question_id and not question_is_visible(q.dependency_question_id, q.dependency_values) and answer is not None:
                 d['question_%d' % q.pk] = None
 
+        # Strip False answers to required yes/no questions even if all_optional is set, as our data model assumes that
+        # required yes/no questions can only be answered with yes
+        for q in question_cache.values():
+            if q.required and q.type == Question.TYPE_BOOLEAN:
+                if 'question_%d' % q.pk in d and d['question_%d' % q.pk] is False:
+                    del d['question_%d' % q.pk]
+
         return d
 
 
@@ -1384,7 +1411,7 @@ class BaseInvoiceAddressForm(forms.ModelForm):
         elif self.validate_vat_id and vat_id_applicable:
             try:
                 normalized_id = validate_vat_id(data.get('vat_id'), str(data.get('country')))
-                self.instance.vat_id_validated = True
+                self.instance.vat_id_validated = bool(normalized_id)
                 self.instance.vat_id = data['vat_id'] = normalized_id
             except VATIDFinalError as e:
                 if self.all_optional:

src/pretix/base/forms/user.py

@@ -33,7 +33,6 @@
 # License for the specific language governing permissions and limitations under the License.
 
 from django import forms
-from django.conf import settings
 from django.contrib.auth.hashers import check_password
 from django.contrib.auth.password_validation import (
     password_validators_help_texts, validate_password,
@@ -46,6 +45,7 @@ from pytz import common_timezones
 from pretix.base.models import User
 from pretix.control.forms import SingleLanguageWidget
 from pretix.helpers.format import format_map
+from pretix.helpers.ratelimit import rate_limit
 
 
 class UserSettingsForm(forms.ModelForm):
@@ -128,16 +128,11 @@ class UserPasswordChangeForm(forms.Form):
     def clean_old_pw(self):
         old_pw = self.cleaned_data.get('old_pw')
 
-        if settings.HAS_REDIS:
-            from django_redis import get_redis_connection
-            rc = get_redis_connection("redis")
-            cnt = rc.incr('pretix_pwchange_%s' % self.user.pk)
-            rc.expire('pretix_pwchange_%s' % self.user.pk, 300)
-            if cnt > 10:
-                raise forms.ValidationError(
-                    self.error_messages['rate_limit'],
-                    code='rate_limit',
-                )
+        if rate_limit("pwchange", self.user.pk, max_num=10, expire_time=300):
+            raise forms.ValidationError(
+                self.error_messages['rate_limit'],
+                code='rate_limit',
+            )
 
         if not check_password(old_pw, self.user.password):
             raise forms.ValidationError(
@@ -175,19 +170,35 @@ class UserEmailChangeForm(forms.Form):
     error_messages = {
         'duplicate_identifier': _("There already is an account associated with this email address. "
                                   "Please choose a different one."),
+        'rate_limit': _("For security reasons, please wait 5 minutes before you try again."),
     }
     old_email = forms.EmailField(label=_('Old email address'), disabled=True)
     new_email = forms.EmailField(label=_('New email address'))
 
     def __init__(self, *args, **kwargs):
         self.user = kwargs.pop('user')
+        self.request = kwargs.pop('request')
         super().__init__(*args, **kwargs)
 
     def clean_new_email(self):
         email = self.cleaned_data['new_email']
+
+        if rate_limit("emailchange_attempt", include_ip_from_request=self.request, max_num=5, expire_time=300):
+            # Rate limit lookup for conflicting email addresses to make enumeration harder
+            raise forms.ValidationError(
+                self.error_messages['rate_limit'],
+                code='rate_limit',
+            )
+
         if User.objects.filter(Q(email__iexact=email) & ~Q(pk=self.user.pk)).exists():
             raise forms.ValidationError(
                 self.error_messages['duplicate_identifier'],
                 code='duplicate_identifier',
             )
+
+        if rate_limit("emailchange", self.user.pk, max_num=2, expire_time=300):
+            raise forms.ValidationError(
+                self.error_messages['rate_limit'],
+                code='rate_limit',
+            )
         return email

src/pretix/base/forms/widgets.py

@@ -43,6 +43,10 @@ from django.utils.timezone import get_current_timezone, now
 from django.utils.translation import gettext_lazy as _
 
 from pretix.helpers.format import PlainHtmlAlternativeString
+from pretix.helpers.i18n import (
+    get_format_without_seconds, get_javascript_format,
+    get_javascript_format_without_seconds,
+)
 
 
 def replace_arabic_numbers(inp):
@@ -108,7 +112,7 @@ class DatePickerWidget(forms.DateInput):
 
 
 class TimePickerWidget(forms.TimeInput):
-    def __init__(self, attrs=None, time_format=None):
+    def __init__(self, attrs=None, time_format=None, without_seconds=False):
         attrs = attrs or {}
         if 'placeholder' in attrs:
             del attrs['placeholder']
@@ -117,8 +121,27 @@ class TimePickerWidget(forms.TimeInput):
         time_attrs['class'] += ' timepickerfield'
         time_attrs['autocomplete'] = 'off'
 
+        if time_format or without_seconds:
+            # Explicitly set data-format attributes for the JS layer instead of relying on the body-wide config
+            def time_format_attr():
+                if without_seconds:
+                    return get_javascript_format_without_seconds(time_format or "TIME_INPUT_FORMATS")
+                return get_javascript_format(time_format or "TIME_INPUT_FORMATS")
+
+            time_attrs['data-format'] = lazy(time_format_attr, str)
+
+            def time_format_attr():
+                if without_seconds:
+                    return get_javascript_format_without_seconds(time_format or "TIME_INPUT_FORMATS")
+                return get_javascript_format(time_format or "TIME_INPUT_FORMATS")
+
+            time_attrs['data-format'] = lazy(time_format_attr, str)
+
         def placeholder():
-            tf = time_format or get_format('TIME_INPUT_FORMATS')[0]
+            if without_seconds:
+                tf = time_format or get_format_without_seconds('TIME_INPUT_FORMATS')
+            else:
+                tf = time_format or get_format('TIME_INPUT_FORMATS')[0]
             return now().replace(
                 year=2000, month=1, day=1, hour=0, minute=0, second=0, microsecond=0
             ).strftime(tf)
@@ -182,7 +205,7 @@ class UploadedFileWidget(forms.ClearableFileInput):
 class SplitDateTimePickerWidget(forms.SplitDateTimeWidget):
     template_name = 'pretixbase/forms/widgets/splitdatetime.html'
 
-    def __init__(self, attrs=None, date_format=None, time_format=None, min_date=None, max_date=None):
+    def __init__(self, attrs=None, date_format=None, time_format=None, min_date=None, max_date=None, without_seconds=False):
         attrs = attrs or {}
         if 'placeholder' in attrs:
             del attrs['placeholder']
@@ -205,14 +228,36 @@ class SplitDateTimePickerWidget(forms.SplitDateTimeWidget):
                 max_date if not isinstance(max_date, datetime) else max_date.astimezone(get_current_timezone()).date()
             ).isoformat()
 
+        if date_format or time_format or without_seconds:
+            # Explicitly set data-format attributes for the JS layer instead of relying on the body-wide config
+            def date_format_attr():
+                if without_seconds:
+                    return get_javascript_format_without_seconds(date_format or "DATE_INPUT_FORMATS")
+                return get_javascript_format(date_format or "DATE_INPUT_FORMATS")
+
+            date_attrs['data-format'] = lazy(date_format_attr, str)
+
+            def time_format_attr():
+                if without_seconds:
+                    return get_javascript_format_without_seconds(time_format or "TIME_INPUT_FORMATS")
+                return get_javascript_format(time_format or "TIME_INPUT_FORMATS")
+
+            time_attrs['data-format'] = lazy(time_format_attr, str)
+
         def date_placeholder():
-            df = date_format or get_format('DATE_INPUT_FORMATS')[0]
+            if without_seconds:
+                df = date_format or get_format_without_seconds('DATE_INPUT_FORMATS')
+            else:
+                df = date_format or get_format('DATE_INPUT_FORMATS')[0]
             return now().replace(
                 year=2000, month=12, day=31, hour=18, minute=0, second=0, microsecond=0
             ).strftime(df)
 
         def time_placeholder():
-            tf = time_format or get_format('TIME_INPUT_FORMATS')[0]
+            if without_seconds:
+                tf = time_format or get_format_without_seconds('TIME_INPUT_FORMATS')
+            else:
+                tf = time_format or get_format('TIME_INPUT_FORMATS')[0]
             return now().replace(
                 year=2000, month=1, day=1, hour=0, minute=0, second=0, microsecond=0
             ).strftime(tf)

src/pretix/base/invoicing/pdf.py

@@ -22,9 +22,7 @@
 import datetime
 import logging
 import math
-import re
 import textwrap
-import unicodedata
 from collections import defaultdict
 from decimal import Decimal
 from io import BytesIO
@@ -58,8 +56,8 @@ from pretix.base.services.currencies import SOURCE_NAMES
 from pretix.base.signals import register_invoice_renderers
 from pretix.base.templatetags.money import money_filter
 from pretix.helpers.reportlab import (
-    FontFallbackParagraph, ThumbnailingImageReader, register_ttf_font_if_new,
-    reshaper,
+    FontFallbackParagraph, PlainTextParagraph, ThumbnailingImageReader,
+    normalize_text, register_ttf_font_if_new, reshaper,
 )
 from pretix.presale.style import get_fonts
 
@@ -259,18 +257,8 @@ class BaseReportlabInvoiceRenderer(BaseInvoiceRenderer):
                 register_ttf_font_if_new(family + ' B I', finders.find(styles['bolditalic']['truetype']))
 
     def _normalize(self, text):
-        # reportlab does not support unicode combination characters
-        # It's important we do this before we use ArabicReshaper
-        text = unicodedata.normalize("NFKC", text)
-
-        # reportlab does not support RTL, ligature-heavy scripts like Arabic. Therefore, we use ArabicReshaper
-        # to resolve all ligatures and python-bidi to switch RTL texts.
-        try:
-            text = "<br />".join(get_display(reshaper.reshape(l)) for l in re.split("<br ?/>", text))
-        except:
-            logger.exception('Reshaping/Bidi fixes failed on string {}'.format(repr(text)))
-
-        return text
+        # alias kept for plugin compatibility
+        return normalize_text(text)
 
     def _upper(self, val):
         # We uppercase labels, but not in every language
@@ -351,10 +339,15 @@ class BaseReportlabInvoiceRenderer(BaseInvoiceRenderer):
         return 'invoice.pdf', 'application/pdf', buffer.read()
 
     def _clean_text(self, text, tags=None):
-        return self._normalize(bleach.clean(
-            text,
-            tags=set(tags) if tags else set()
-        ).strip().replace('<br>', '<br />').replace('\n', '<br />\n'))
+        # For backwards compatibility with customer content, we need to support tags like <br> and <b> in a few text
+        # fields. Therefore, we can't use PlainTextParagraph for these, but run bleach instead to limit the allowed
+        # tags.
+        return self._normalize(
+            bleach.clean(
+                text,
+                tags=set(tags) if tags else set()
+            ).strip().replace('<br>', '<br />').replace('\n', '<br />\n')
+        )
 
 
 class PaidMarker(Flowable):
@@ -405,8 +398,7 @@ class ClassicInvoiceRenderer(BaseReportlabInvoiceRenderer):
     invoice_to_top = 52 * mm
 
     def _draw_invoice_to(self, canvas):
-        p = FontFallbackParagraph(self._clean_text(self.invoice.address_invoice_to),
-                                  style=self.stylesheet['Normal'])
+        p = PlainTextParagraph(self.invoice.address_invoice_to, style=self.stylesheet['Normal'])
         p.wrapOn(canvas, self.invoice_to_width, self.invoice_to_height)
         p_size = p.wrap(self.invoice_to_width, self.invoice_to_height)
         p.drawOn(canvas, self.invoice_to_left, self.pagesize[1] - p_size[1] - self.invoice_to_top)
@@ -417,8 +409,8 @@ class ClassicInvoiceRenderer(BaseReportlabInvoiceRenderer):
     invoice_from_top = 17 * mm
 
     def _draw_invoice_from(self, canvas):
-        p = FontFallbackParagraph(
-            self._clean_text(self.invoice.full_invoice_from),
+        p = PlainTextParagraph(
+            self.invoice.full_invoice_from,
             style=self.stylesheet['InvoiceFrom']
         )
         p.wrapOn(canvas, self.invoice_from_width, self.invoice_from_height)
@@ -548,13 +540,12 @@ class ClassicInvoiceRenderer(BaseReportlabInvoiceRenderer):
     def _draw_event(self, canvas):
         def shorten(txt):
             txt = str(txt)
-            txt = bleach.clean(txt, tags=set()).strip()
-            p = FontFallbackParagraph(self._normalize(txt.strip().replace('\n', '<br />\n')), style=self.stylesheet['Normal'])
+            p = PlainTextParagraph(txt, style=self.stylesheet['Normal'])
             p_size = p.wrap(self.event_width, self.event_height)
 
             while p_size[1] > 2 * self.stylesheet['Normal'].leading:
                 txt = ' '.join(txt.replace('…', '').split()[:-1]) + '…'
-                p = FontFallbackParagraph(self._normalize(txt.strip().replace('\n', '<br />\n')), style=self.stylesheet['Normal'])
+                p = PlainTextParagraph(txt, style=self.stylesheet['Normal'])
                 p_size = p.wrap(self.event_width, self.event_height)
             return txt
 
@@ -572,7 +563,7 @@ class ClassicInvoiceRenderer(BaseReportlabInvoiceRenderer):
         else:
             p_str = shorten(self.invoice.event.name)
 
-        p = FontFallbackParagraph(self._normalize(p_str.strip().replace('\n', '<br />\n')), style=self.stylesheet['Normal'])
+        p = PlainTextParagraph(p_str, style=self.stylesheet['Normal'])
         p.wrapOn(canvas, self.event_width, self.event_height)
         p_size = p.wrap(self.event_width, self.event_height)
         p.drawOn(canvas, self.event_left, self.pagesize[1] - self.event_top - p_size[1])
@@ -645,39 +636,37 @@ class ClassicInvoiceRenderer(BaseReportlabInvoiceRenderer):
 
         type_info_text = self.invoice.transmission_type_instance.pdf_info_text()
         if type_info_text:
-            story.append(FontFallbackParagraph(
+            story.append(PlainTextParagraph(
                 type_info_text,
                 self.stylesheet['WarningBlock']
             ))
 
         if self.invoice.custom_field:
-            story.append(FontFallbackParagraph(
+            story.append(PlainTextParagraph(
                 '{}: {}'.format(
-                    self._clean_text(str(self.invoice.event.settings.invoice_address_custom_field)),
-                    self._clean_text(self.invoice.custom_field),
+                    str(self.invoice.event.settings.invoice_address_custom_field),
+                    self.invoice.custom_field,
                 ),
                 self.stylesheet['Normal']
             ))
 
         if self.invoice.internal_reference:
-            story.append(FontFallbackParagraph(
-                self._normalize(pgettext('invoice', 'Customer reference: {reference}').format(
-                    reference=self._clean_text(self.invoice.internal_reference),
-                )),
+            story.append(PlainTextParagraph(
+                pgettext('invoice', 'Customer reference: {reference}').format(
+                    reference=self.invoice.internal_reference,
+                ),
                 self.stylesheet['Normal']
             ))
 
         if self.invoice.invoice_to_vat_id:
-            story.append(FontFallbackParagraph(
-                self._normalize(pgettext('invoice', 'Customer VAT ID')) + ': ' +
-                self._clean_text(self.invoice.invoice_to_vat_id),
+            story.append(PlainTextParagraph(
+                pgettext('invoice', 'Customer VAT ID') + ': ' + self.invoice.invoice_to_vat_id,
                 self.stylesheet['Normal']
             ))
 
         if self.invoice.invoice_to_beneficiary:
-            story.append(FontFallbackParagraph(
-                self._normalize(pgettext('invoice', 'Beneficiary')) + ':<br />' +
-                self._clean_text(self.invoice.invoice_to_beneficiary),
+            story.append(PlainTextParagraph(
+                pgettext('invoice', 'Beneficiary') + ':\n' + self.invoice.invoice_to_beneficiary,
                 self.stylesheet['Normal']
             ))
 
@@ -707,11 +696,11 @@ class ClassicInvoiceRenderer(BaseReportlabInvoiceRenderer):
 
         story = [
             NextPageTemplate('FirstPage'),
-            FontFallbackParagraph(
-                self._normalize(
+            PlainTextParagraph(
+                (
                     pgettext('invoice', 'Tax Invoice') if str(self.invoice.invoice_from_country) == 'AU'
                     else pgettext('invoice', 'Invoice')
-                ) if not self.invoice.is_cancellation else self._normalize(pgettext('invoice', 'Cancellation')),
+                ) if not self.invoice.is_cancellation else pgettext('invoice', 'Cancellation'),
                 self.stylesheet['Heading1']
             ),
             Spacer(1, 5 * mm),
@@ -733,17 +722,17 @@ class ClassicInvoiceRenderer(BaseReportlabInvoiceRenderer):
         ]
         if has_taxes:
             tdata = [(
-                FontFallbackParagraph(self._normalize(pgettext('invoice', 'Description')), self.stylesheet['Bold']),
-                FontFallbackParagraph(self._normalize(pgettext('invoice', 'Qty')), self.stylesheet['BoldRightNoSplit']),
-                FontFallbackParagraph(self._normalize(pgettext('invoice', 'Tax rate')), self.stylesheet['BoldRightNoSplit']),
-                FontFallbackParagraph(self._normalize(pgettext('invoice', 'Net')), self.stylesheet['BoldRightNoSplit']),
-                FontFallbackParagraph(self._normalize(pgettext('invoice', 'Gross')), self.stylesheet['BoldRightNoSplit']),
+                PlainTextParagraph(pgettext('invoice', 'Description'), self.stylesheet['Bold']),
+                PlainTextParagraph(pgettext('invoice', 'Qty'), self.stylesheet['BoldRightNoSplit']),
+                PlainTextParagraph(pgettext('invoice', 'Tax rate'), self.stylesheet['BoldRightNoSplit']),
+                PlainTextParagraph(pgettext('invoice', 'Net'), self.stylesheet['BoldRightNoSplit']),
+                PlainTextParagraph(pgettext('invoice', 'Gross'), self.stylesheet['BoldRightNoSplit']),
             )]
         else:
             tdata = [(
-                FontFallbackParagraph(self._normalize(pgettext('invoice', 'Description')), self.stylesheet['Bold']),
-                FontFallbackParagraph(self._normalize(pgettext('invoice', 'Qty')), self.stylesheet['BoldRightNoSplit']),
-                FontFallbackParagraph(self._normalize(pgettext('invoice', 'Amount')), self.stylesheet['BoldRightNoSplit']),
+                PlainTextParagraph(pgettext('invoice', 'Description'), self.stylesheet['Bold']),
+                PlainTextParagraph(pgettext('invoice', 'Qty'), self.stylesheet['BoldRightNoSplit']),
+                PlainTextParagraph(pgettext('invoice', 'Amount'), self.stylesheet['BoldRightNoSplit']),
             )]
 
         def _group_key(line):
@@ -780,8 +769,8 @@ class ClassicInvoiceRenderer(BaseReportlabInvoiceRenderer):
             max_height = self.stylesheet['Normal'].leading * 5
             p_style = self.stylesheet['Normal']
             for __ in range(1000):
-                p = FontFallbackParagraph(
-                    self._clean_text(curr_description, tags=['br']),
+                p = PlainTextParagraph(
+                    curr_description,
                     p_style
                 )
                 h = p.wrap(max_width, doc.height)[1]
@@ -862,7 +851,7 @@ class ClassicInvoiceRenderer(BaseReportlabInvoiceRenderer):
                 # Group together at the end of the invoice
                 request_show_service_date = period_line
             elif period_line:
-                description_p_list.append(FontFallbackParagraph(
+                description_p_list.append(PlainTextParagraph(
                     period_line,
                     self.stylesheet['Fineprint']
                 ))
@@ -874,7 +863,7 @@ class ClassicInvoiceRenderer(BaseReportlabInvoiceRenderer):
                         net_price=money_filter(net_value, self.invoice.event.currency),
                         gross_price=money_filter(gross_value, self.invoice.event.currency),
                     )
-                    description_p_list.append(FontFallbackParagraph(
+                    description_p_list.append(PlainTextParagraph(
                         single_price_line,
                         self.stylesheet['Fineprint']
                     ))
@@ -883,11 +872,11 @@ class ClassicInvoiceRenderer(BaseReportlabInvoiceRenderer):
                     description_p_list.pop(0),
                     str(len(lines)),
                     localize(tax_rate) + " %",
-                    FontFallbackParagraph(
+                    PlainTextParagraph(
                         money_filter(net_value * len(lines), self.invoice.event.currency).replace('\xa0', ' '),
                         self.stylesheet['NormalRight']
                     ),
-                    FontFallbackParagraph(
+                    PlainTextParagraph(
                         money_filter(gross_value * len(lines), self.invoice.event.currency).replace('\xa0', ' '),
                         self.stylesheet['NormalRight']
                     ),
@@ -904,14 +893,14 @@ class ClassicInvoiceRenderer(BaseReportlabInvoiceRenderer):
                     single_price_line = pgettext('invoice', 'Single price: {price}').format(
                         price=money_filter(gross_value, self.invoice.event.currency),
                     )
-                    description_p_list.append(FontFallbackParagraph(
+                    description_p_list.append(PlainTextParagraph(
                         single_price_line,
                         self.stylesheet['Fineprint']
                     ))
                 tdata.append((
                     description_p_list.pop(0),
                     str(len(lines)),
-                    FontFallbackParagraph(
+                    PlainTextParagraph(
                         money_filter(gross_value * len(lines), self.invoice.event.currency).replace('\xa0', ' '),
                         self.stylesheet['NormalRight']
                     ),
@@ -944,12 +933,12 @@ class ClassicInvoiceRenderer(BaseReportlabInvoiceRenderer):
 
         if has_taxes:
             tdata.append([
-                FontFallbackParagraph(self._normalize(pgettext('invoice', 'Invoice total')), self.stylesheet['Bold']), '', '', '',
+                PlainTextParagraph(pgettext('invoice', 'Invoice total'), self.stylesheet['Bold']), '', '', '',
                 money_filter(total, self.invoice.event.currency)
             ])
         else:
             tdata.append([
-                FontFallbackParagraph(self._normalize(pgettext('invoice', 'Invoice total')), self.stylesheet['Bold']), '',
+                PlainTextParagraph(pgettext('invoice', 'Invoice total'), self.stylesheet['Bold']), '',
                 money_filter(total, self.invoice.event.currency)
             ])
 
@@ -958,12 +947,12 @@ class ClassicInvoiceRenderer(BaseReportlabInvoiceRenderer):
                 pending_sum = self.invoice.order.pending_sum
                 if pending_sum != total:
                     tdata.append(
-                        [FontFallbackParagraph(self._normalize(pgettext('invoice', 'Received payments')), self.stylesheet['Normal'])] +
+                        [PlainTextParagraph(pgettext('invoice', 'Received payments'), self.stylesheet['Normal'])] +
                         (['', '', ''] if has_taxes else ['']) +
                         [money_filter(pending_sum - total, self.invoice.event.currency)]
                     )
                     tdata.append(
-                        [FontFallbackParagraph(self._normalize(pgettext('invoice', 'Outstanding payments')), self.stylesheet['Bold'])] +
+                        [PlainTextParagraph(pgettext('invoice', 'Outstanding payments'), self.stylesheet['Bold'])] +
                         (['', '', ''] if has_taxes else ['']) +
                         [money_filter(pending_sum, self.invoice.event.currency)]
                     )
@@ -980,12 +969,12 @@ class ClassicInvoiceRenderer(BaseReportlabInvoiceRenderer):
                     s=Sum('amount')
                 )['s'] or Decimal('0.00')
                 tdata.append(
-                    [FontFallbackParagraph(self._normalize(pgettext('invoice', 'Paid by gift card')), self.stylesheet['Normal'])] +
+                    [PlainTextParagraph(pgettext('invoice', 'Paid by gift card'), self.stylesheet['Normal'])] +
                     (['', '', ''] if has_taxes else ['']) +
                     [money_filter(giftcard_sum, self.invoice.event.currency)]
                 )
                 tdata.append(
-                    [FontFallbackParagraph(self._normalize(pgettext('invoice', 'Remaining amount')), self.stylesheet['Bold'])] +
+                    [PlainTextParagraph(pgettext('invoice', 'Remaining amount'), self.stylesheet['Bold'])] +
                     (['', '', ''] if has_taxes else ['']) +
                     [money_filter(total - giftcard_sum, self.invoice.event.currency)]
                 )
@@ -1008,14 +997,14 @@ class ClassicInvoiceRenderer(BaseReportlabInvoiceRenderer):
         story.append(Spacer(1, 10 * mm))
 
         if request_show_service_date:
-            story.append(FontFallbackParagraph(
-                self._normalize(pgettext('invoice', 'Invoice period: {daterange}').format(daterange=request_show_service_date)),
+            story.append(PlainTextParagraph(
+                pgettext('invoice', 'Invoice period: {daterange}').format(daterange=request_show_service_date),
                 self.stylesheet['Normal']
             ))
 
         if self.invoice.payment_provider_text:
             story.append(FontFallbackParagraph(
-                self._normalize(self.invoice.payment_provider_text),
+                self._clean_text(self.invoice.payment_provider_text, tags=['br', 'b']),
                 self.stylesheet['Normal']
             ))
 
@@ -1039,10 +1028,10 @@ class ClassicInvoiceRenderer(BaseReportlabInvoiceRenderer):
             ('FONTNAME', (0, 0), (-1, -1), self.font_regular),
         ]
         thead = [
-            FontFallbackParagraph(self._normalize(pgettext('invoice', 'Tax rate')), self.stylesheet['Fineprint']),
-            FontFallbackParagraph(self._normalize(pgettext('invoice', 'Net value')), self.stylesheet['FineprintRight']),
-            FontFallbackParagraph(self._normalize(pgettext('invoice', 'Gross value')), self.stylesheet['FineprintRight']),
-            FontFallbackParagraph(self._normalize(pgettext('invoice', 'Tax')), self.stylesheet['FineprintRight']),
+            PlainTextParagraph(pgettext('invoice', 'Tax rate'), self.stylesheet['Fineprint']),
+            PlainTextParagraph(pgettext('invoice', 'Net value'), self.stylesheet['FineprintRight']),
+            PlainTextParagraph(pgettext('invoice', 'Gross value'), self.stylesheet['FineprintRight']),
+            PlainTextParagraph(pgettext('invoice', 'Tax'), self.stylesheet['FineprintRight']),
             ''
         ]
         tdata = [thead]
@@ -1053,7 +1042,7 @@ class ClassicInvoiceRenderer(BaseReportlabInvoiceRenderer):
                 continue
             tax = taxvalue_map[idx]
             tdata.append([
-                FontFallbackParagraph(self._normalize(localize(rate) + " % " + name), self.stylesheet['Fineprint']),
+                PlainTextParagraph(localize(rate) + " % " + name, self.stylesheet['Fineprint']),
                 money_filter(gross - tax, self.invoice.event.currency),
                 money_filter(gross, self.invoice.event.currency),
                 money_filter(tax, self.invoice.event.currency),
@@ -1072,7 +1061,7 @@ class ClassicInvoiceRenderer(BaseReportlabInvoiceRenderer):
             table.setStyle(TableStyle(tstyledata))
             story.append(Spacer(5 * mm, 5 * mm))
             story.append(KeepTogether([
-                FontFallbackParagraph(self._normalize(pgettext('invoice', 'Included taxes')), self.stylesheet['FineprintHeading']),
+                PlainTextParagraph(pgettext('invoice', 'Included taxes'), self.stylesheet['FineprintHeading']),
                 table
             ]))
 
@@ -1089,7 +1078,7 @@ class ClassicInvoiceRenderer(BaseReportlabInvoiceRenderer):
                     net = gross - tax
 
                     tdata.append([
-                        FontFallbackParagraph(self._normalize(localize(rate) + " % " + name), self.stylesheet['Fineprint']),
+                        PlainTextParagraph(localize(rate) + " % " + name, self.stylesheet['Fineprint']),
                         fmt(net), fmt(gross), fmt(tax), ''
                     ])
 
@@ -1098,13 +1087,13 @@ class ClassicInvoiceRenderer(BaseReportlabInvoiceRenderer):
 
                 story.append(KeepTogether([
                     Spacer(1, height=2 * mm),
-                    FontFallbackParagraph(
-                        self._normalize(pgettext(
+                    PlainTextParagraph(
+                        pgettext(
                             'invoice', 'Using the conversion rate of 1:{rate} as published by the {authority} on '
                                        '{date}, this corresponds to:'
                         ).format(rate=localize(self.invoice.foreign_currency_rate),
                                  authority=SOURCE_NAMES.get(self.invoice.foreign_currency_source, "?"),
-                                 date=date_format(self.invoice.foreign_currency_rate_date, "SHORT_DATE_FORMAT"))),
+                                 date=date_format(self.invoice.foreign_currency_rate_date, "SHORT_DATE_FORMAT")),
                         self.stylesheet['Fineprint']
                     ),
                     Spacer(1, height=3 * mm),
@@ -1113,14 +1102,14 @@ class ClassicInvoiceRenderer(BaseReportlabInvoiceRenderer):
         elif self.invoice.foreign_currency_display and self.invoice.foreign_currency_rate:
             foreign_total = round_decimal(total * self.invoice.foreign_currency_rate)
             story.append(Spacer(1, 5 * mm))
-            story.append(FontFallbackParagraph(self._normalize(
+            story.append(PlainTextParagraph(
                 pgettext(
                     'invoice', 'Using the conversion rate of 1:{rate} as published by the {authority} on '
                                '{date}, the invoice total corresponds to {total}.'
                 ).format(rate=localize(self.invoice.foreign_currency_rate),
                          date=date_format(self.invoice.foreign_currency_rate_date, "SHORT_DATE_FORMAT"),
                          authority=SOURCE_NAMES.get(self.invoice.foreign_currency_source, "?"),
-                         total=fmt(foreign_total))),
+                         total=fmt(foreign_total)),
                 self.stylesheet['Fineprint']
             ))
 
@@ -1160,13 +1149,10 @@ class Modern1Renderer(ClassicInvoiceRenderer):
         return stylesheet
 
     def _draw_invoice_from(self, canvas):
-        if not self.invoice.invoice_from:
+        if not self.invoice.address_invoice_from:
             return
-        c = [
-            self._clean_text(l)
-            for l in self.invoice.address_invoice_from.strip().split('\n')
-        ]
-        p = FontFallbackParagraph(self._normalize(' · '.join(c)), style=self.stylesheet['Sender'])
+        c = self.invoice.address_invoice_from.strip().split('\n')
+        p = PlainTextParagraph(' · '.join(c), style=self.stylesheet['Sender'])
         p.wrapOn(canvas, self.invoice_to_width, 15.7 * mm)
         p.drawOn(canvas, self.invoice_to_left, self.pagesize[1] - self.invoice_to_top + 2 * mm)
         super()._draw_invoice_from(canvas)
@@ -1225,8 +1211,8 @@ class Modern1Renderer(ClassicInvoiceRenderer):
                 _draw(pgettext('invoice', 'Order code'), self.invoice.order.full_code, value_size, self.left_margin, 45 * mm, **kwargs)
             ]
 
-            p = FontFallbackParagraph(
-                self._normalize(date_format(self.invoice.date, "DATE_FORMAT")),
+            p = PlainTextParagraph(
+                date_format(self.invoice.date, "DATE_FORMAT"),
                 style=ParagraphStyle(name=f'Normal{value_size}', fontName=self.font_regular, fontSize=value_size, leading=value_size * 1.2)
             )
             w = stringWidth(p.text, p.frags[0].fontName, p.frags[0].fontSize)
@@ -1283,7 +1269,7 @@ class Modern1SimplifiedRenderer(Modern1Renderer):
         i = []
 
         if not self.invoice.event.has_subevents and self.invoice.event.settings.show_dates_on_frontpage:
-            i.append(FontFallbackParagraph(
+            i.append(PlainTextParagraph(
                 pgettext('invoice', 'Event date: {date_range}').format(
                     date_range=self.invoice.event.get_date_range_display(),
                 ),

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

@@ -0,0 +1,29 @@
+#
+# This file is part of pretix (Community Edition).
+#
+# Copyright (C) 2014-2020  Raphael Michel and contributors
+# Copyright (C) 2020-today pretix GmbH and contributors
+#
+# This program is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General
+# Public License as published by the Free Software Foundation in version 3 of the License.
+#
+# ADDITIONAL TERMS APPLY: Pursuant to Section 7 of the GNU Affero General Public License, additional terms are
+# applicable granting you additional permissions and placing additional restrictions on your usage of this software.
+# Please refer to the pretix LICENSE file to obtain the full terms applicable to this work. If you did not receive
+# this file, see <https://pretix.eu/about/en/license>.
+#
+# This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied
+# warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Affero General Public License for more
+# details.
+#
+# You should have received a copy of the GNU Affero General Public License along with this program.  If not, see
+# <https://www.gnu.org/licenses/>.
+#
+from django.core.management.base import BaseCommand
+
+
+class Command(BaseCommand):
+    help = "Do nothing. Useful for startup performance testing."
+
+    def handle(self, *args, **options):
+        pass

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

@@ -40,6 +40,7 @@ from django.core.cache import cache
 from django.core.management.base import BaseCommand
 from django.db import close_old_connections
 from django.dispatch.dispatcher import NO_RECEIVERS
+from django_querytagger.tagging import with_tag
 
 from pretix.helpers.periodic import SKIPPED
 
@@ -82,7 +83,8 @@ class Command(BaseCommand):
             try:
                 # Check if the DB connection is still good, it might be closed if the previous task took too long.
                 close_old_connections()
-                r = receiver(signal=periodic_task, sender=self)
+                with with_tag(f"periodictask={name}"):
+                    r = receiver(signal=periodic_task, sender=self)
             except Exception as err:
                 if isinstance(err, KeyboardInterrupt):
                     raise err

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

@@ -0,0 +1,60 @@
+#
+# This file is part of pretix (Community Edition).
+#
+# Copyright (C) 2014-2020  Raphael Michel and contributors
+# Copyright (C) 2020-today pretix GmbH and contributors
+#
+# This program is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General
+# Public License as published by the Free Software Foundation in version 3 of the License.
+#
+# ADDITIONAL TERMS APPLY: Pursuant to Section 7 of the GNU Affero General Public License, additional terms are
+# applicable granting you additional permissions and placing additional restrictions on your usage of this software.
+# Please refer to the pretix LICENSE file to obtain the full terms applicable to this work. If you did not receive
+# this file, see <https://pretix.eu/about/en/license>.
+#
+# This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied
+# warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Affero General Public License for more
+# details.
+#
+# You should have received a copy of the GNU Affero General Public License along with this program.  If not, see
+# <https://www.gnu.org/licenses/>.
+#
+
+"""This command supersedes the Django-inbuilt runserver command.
+
+It runs the local frontend server, if node is installed and the setting
+is set.
+"""
+import atexit
+import os
+import subprocess
+from pathlib import Path
+
+from django.conf import settings
+from django.contrib.staticfiles.management.commands.runserver import (
+    Command as Parent,
+)
+from django.utils.autoreload import DJANGO_AUTORELOAD_ENV
+
+
+class Command(Parent):
+    def handle(self, *args, **options):
+        # Only start Vite in the non-main process of the autoreloader
+        if settings.VITE_DEV_MODE and os.environ.get(DJANGO_AUTORELOAD_ENV) != "true":
+            # Start the vite server in the background
+            vite_server = subprocess.Popen(
+                ["npm", "run", "dev:control"],
+                cwd=Path(__file__).parent.parent.parent.parent.parent,
+                stdin=subprocess.DEVNULL
+            )
+
+            def cleanup():
+                vite_server.terminate()
+                try:
+                    vite_server.wait(timeout=5)
+                except subprocess.TimeoutExpired:
+                    vite_server.kill()
+
+            atexit.register(cleanup)
+
+        super().handle(*args, **options)

src/pretix/base/media.py

@@ -26,6 +26,7 @@ from django.utils.translation import gettext_lazy as _
 
 class BaseMediaType:
     medium_created_by_server = False
+    medium_created_from_unknown_supported = False
     supports_orderposition = False
     supports_giftcard = False
 
@@ -56,7 +57,7 @@ class BaseMediaType:
     def is_active(self, organizer):
         return organizer.settings.get(f'reusable_media_type_{self.identifier}', as_type=bool, default=False)
 
-    def handle_unknown(self, organizer, identifier, user, auth):
+    def handle_unknown(self, organizer, identifier, user, auth, force_create=False):
         pass
 
     def handle_new(self, organizer, medium, user, auth):
@@ -88,23 +89,32 @@ class NfcUidMediaType(BaseMediaType):
     verbose_name = _('NFC UID-based')
     icon = 'pretixbase/img/media/nfc_uid.svg'
     medium_created_by_server = False
+    medium_created_from_unknown_supported = True
     supports_giftcard = True
-    supports_orderposition = False
+    supports_orderposition = True
 
-    def handle_unknown(self, organizer, identifier, user, auth):
+    def handle_unknown(self, organizer, identifier, user, auth, force_create=False):
         from pretix.base.models import GiftCard, ReusableMedium
 
-        if organizer.settings.get(f'reusable_media_type_{self.identifier}_autocreate_giftcard', as_type=bool):
+        create_giftcard = organizer.settings.get(f'reusable_media_type_{self.identifier}_autocreate_giftcard', as_type=bool)
+        if create_giftcard or force_create:
             if identifier.startswith("08"):
                 # Don't create gift cards for NFC UIDs that start with 08, which represents NFC cards that issue random
                 # UIDs on every read, so they won't be useful.
                 return
             with transaction.atomic():
-                gc = GiftCard.objects.create(
-                    issuer=organizer,
-                    expires=organizer.default_gift_card_expiry,
-                    currency=organizer.settings.get(f'reusable_media_type_{self.identifier}_autocreate_giftcard_currency'),
-                )
+                if create_giftcard:
+                    gc = GiftCard.objects.create(
+                        issuer=organizer,
+                        expires=organizer.default_gift_card_expiry,
+                        currency=organizer.settings.get(f'reusable_media_type_{self.identifier}_autocreate_giftcard_currency'),
+                    )
+                    gc.log_action(
+                        'pretix.giftcards.created',
+                        user=user, auth=auth,
+                    )
+                else:
+                    gc = None
                 m = ReusableMedium.objects.create(
                     type=self.identifier,
                     identifier=identifier,
@@ -116,10 +126,6 @@ class NfcUidMediaType(BaseMediaType):
                     'pretix.reusable_medium.created.auto',
                     user=user, auth=auth,
                 )
-                gc.log_action(
-                    'pretix.giftcards.created',
-                    user=user, auth=auth,
-                )
                 return m
 
 
@@ -129,7 +135,7 @@ class NfcMf0aesMediaType(BaseMediaType):
     icon = 'pretixbase/img/media/nfc_secure.svg'
     medium_created_by_server = False
     supports_giftcard = True
-    supports_orderposition = False
+    supports_orderposition = True
 
     def handle_new(self, organizer, medium, user, auth):
         from pretix.base.models import GiftCard

src/pretix/base/metrics.py

@@ -282,10 +282,12 @@ def metric_values():
 
     # Throwaway metrics
     exact_tables = [
-        Order, OrderPosition, Invoice, Event, Organizer
+        Order, Invoice, Event, Organizer
     ]
     for m in apps.get_models():  # Count all models
-        if any(issubclass(m, p) for p in exact_tables):
+        if issubclass(m, OrderPosition):
+            metrics['pretix_model_instances']['{model="%s"}' % m._meta] = m.all.count()
+        elif any(issubclass(m, p) for p in exact_tables):
             metrics['pretix_model_instances']['{model="%s"}' % m._meta] = m.objects.count()
         else:
             metrics['pretix_model_instances']['{model="%s"}' % m._meta] = estimate_count_fast(m)

src/pretix/base/middleware.py

@@ -19,6 +19,10 @@
 # You should have received a copy of the GNU Affero General Public License along with this program.  If not, see
 # <https://www.gnu.org/licenses/>.
 #
+import base64
+import hashlib
+import logging
+import re
 from collections import OrderedDict
 from urllib.parse import urlparse, urlsplit
 from zoneinfo import ZoneInfo, ZoneInfoNotFoundError
@@ -43,6 +47,8 @@ from pretix.multidomain.urlreverse import (
 )
 from pretix.presale.style import get_fonts
 
+logger = logging.getLogger(__name__)
+
 _supported = None
 
 
@@ -65,15 +71,49 @@ def get_supported_language(requested_language, allowed_languages, default_langua
     return language
 
 
-class LocaleMiddleware(MiddlewareMixin):
-
+class BaseLocaleMiddleware(MiddlewareMixin):
     """
-    This middleware sets the correct locale and timezone
-    for a request.
+    This is a reduced LocaleMiddleware that uses only information contained in the WSGI request data
+    to figure out the language (cookie and browser settings). We need it to have a consistent language
+    for error pages that are generated from the middleware stack before we know e.g. which user is logged
+    in or which event is selected.
+    """
+
+    def process_request(self, request: HttpRequest):
+        language = get_language_from_early_request(request)
+        translation.activate(language)
+        set_region(None)
+        request.LANGUAGE_CODE = language
+        timezone.deactivate()
+
+    def process_response(self, request: HttpRequest, response: HttpResponse):
+        language = translation.get_language()
+        patch_vary_headers(response, ('Accept-Language',))
+        if 'Content-Language' not in response:
+            response['Content-Language'] = language
+        return response
+
+
+class LocaleMiddleware(MiddlewareMixin):
+    """
+    This is the full LocaleMiddleware that uses all available information to figure out the correct
+    language for the request using all available sources, in this order of priority:
+
+    - Backend: User settings
+    - Language cookie
+    - Frontend: Customer account settings
+    - Browser settings
+    - Frontend: Event/Organizer settings
+    - System default
+
+    It needs to run late in the middleware stack to have all information available for these steps.
+    For some cases, it is even ran a second time since the event is sometimes only figured out after the
+    middleware stack (can happen for plugin views).
     """
 
     def process_request(self, request: HttpRequest):
         language = get_language_from_request(request)
+        region = None
         # Normally, this middleware runs *before* the event is set. However, on event frontend pages it
         # might be run a second time by pretix.presale.EventMiddleware and in this case the event is already
         # set and can be taken into account for the decision.
@@ -94,15 +134,16 @@ class LocaleMiddleware(MiddlewareMixin):
                 if '-' not in language and settings_holder.settings.region:
                     language += '-' + settings_holder.settings.region
                 if settings_holder.settings.region:
-                    set_region(settings_holder.settings.region)
+                    region = settings_holder.settings.region
         else:
             gs = global_settings_object(request)
             if '-' not in language and gs.settings.region:
                 language += '-' + gs.settings.region
             if gs.settings.region:
-                set_region(gs.settings.region)
+                region = gs.settings.region
 
         translation.activate(language)
+        set_region(region)
         request.LANGUAGE_CODE = get_language_without_region()
 
         tzname = None
@@ -182,6 +223,24 @@ def get_default_language():
         return settings.LANGUAGE_CODE
 
 
+def get_language_from_early_request(request: HttpRequest) -> str:
+    """
+    Analyzes the request to find what language the user wants the system to
+    show using only WSGI-available information. Only languages listed in
+    settings.LANGUAGES are taken into account. If the user requests a sublanguage
+    where we have a main language, we send out the main language.
+    """
+    global _supported
+    if _supported is None:
+        _supported = OrderedDict(settings.LANGUAGES)
+
+    return (
+        get_language_from_cookie(request)
+        or get_language_from_browser(request)
+        or get_default_language()
+    )
+
+
 def get_language_from_request(request: HttpRequest) -> str:
     """
     Analyzes the request to find what language the user wants the system to
@@ -196,7 +255,6 @@ def get_language_from_request(request: HttpRequest) -> str:
     if request.path.startswith(get_script_prefix() + 'control'):
         return (
             get_language_from_user_settings(request)
-            or get_language_from_customer_settings(request)
             or get_language_from_cookie(request)
             or get_language_from_browser(request)
             or get_language_from_event(request)
@@ -221,7 +279,26 @@ def _parse_csp(header):
     return h
 
 
+VALID_CSP_DIRECTIVES = [
+    "child-src", "connect-src", "default-src", "fenced-frame-src", "font-src", "form-action", "frame-src", "img-src",
+    "manifest-src", "media-src", "object-src", "prefetch-src", "report-uri", "script-src", "script-src-elem",
+    "script-src-attr", "style-src", "style-src-elem", "style-src-attr", "worker-src",
+]
+
+CSP_ILLEGAL_CHARS = re.compile(r'[\s,;]')
+
+
+def _sanitize_csp(h):
+    for k, v in h.items():
+        if k not in VALID_CSP_DIRECTIVES:
+            raise ValueError("Invalid CSP directive " + k)
+        if any(CSP_ILLEGAL_CHARS.search(el) for el in v):
+            logger.warning("Stripping invalid component from CSP: %r", h)
+            h[k] = [el for el in v if not CSP_ILLEGAL_CHARS.search(el)]
+
+
 def _render_csp(h):
+    _sanitize_csp(h)
     return "; ".join(k + ' ' + ' '.join(v) for k, v in h.items() if v)
 
 
@@ -237,25 +314,51 @@ def _merge_csp(a, b):
     for k, v in a.items():
         if "'unsafe-inline'" in v:
             # If we need unsafe-inline, drop any hashes or nonce as they will be ignored otherwise
-            a[k] = [i for i in v if not i.startswith("'nonce-") and not i.startswith("'sha-")]
+            a[k] = [i for i in v if not i.startswith("'nonce-") and not i.startswith("'sha256-")]
+
+
+def add_to_response_csp(response, csp_to_merge):
+    if "Content-Security-Policy" in response:
+        csp = _parse_csp(response["Content-Security-Policy"])
+    else:
+        csp = {}
+
+    _merge_csp(csp, csp_to_merge)
+
+    if csp:
+        response["Content-Security-Policy"] = _render_csp(csp)
+
+
+def add_to_response_csp_via_request(request, csp_to_merge):
+    _merge_csp(request._csp_to_merge, csp_to_merge)
+
+
+def calculate_csp_hash(data):
+    hash_str = base64.b64encode(hashlib.sha256(data.encode("utf-8")).digest()).decode("ascii")
+    return f"'sha256-{hash_str}'"
 
 
 class SecurityMiddleware(MiddlewareMixin):
-    CSP_EXEMPT = (
-        '/api/v1/docs/',
+    SAFE_TYPES = (
+        # CSP policies are only used for:
+        # - HTML and SVG in top-level contexts
+        # - SVG or JS Workers delivered in embedded contexts
+        # See: https://www.w3.org/TR/CSP2/#which-policy-applies
+        # Therefore, we can save bandwidth on not including our (sometimes huge) policy
+        # on API responses or CSS. We do however include it with other types as a precaution
+        # (whitelist instead of blacklist) and we also do not whitelist JavaScript in
+        # we ever add service workers to not break the protection of this feature:
+        # https://www.w3.org/TR/CSP2/#sandboxing-and-workers
+        'application/json',
+        'text/css',
+        # We used to skip CSP for PDF since it was necessary for inline previews in Safari,
+        # but at the moment it does not seem to be an issue to just send it.
     )
 
+    def process_request(self, request):
+        request._csp_to_merge = {}
+
     def process_response(self, request, resp):
-        def nested_dict_values(d):
-            for v in d.values():
-                if isinstance(v, dict):
-                    yield from nested_dict_values(v)
-                else:
-                    if isinstance(v, str):
-                        yield v
-
-        url = resolve(request.path_info)
-
         if settings.DEBUG and resp.status_code >= 400:
             # Don't use CSP on debug error page as it breaks of Django's fancy error
             # pages
@@ -266,28 +369,34 @@ class SecurityMiddleware(MiddlewareMixin):
         # https://github.com/pretix/pretix/issues/765
         resp['P3P'] = 'CP=\"ALL DSP COR CUR ADM TAI OUR IND COM NAV INT\"'
 
-        img_src = []
-        gs = global_settings_object(request)
-        if gs.settings.leaflet_tiles:
-            img_src.append(gs.settings.leaflet_tiles[:gs.settings.leaflet_tiles.index("/", 10)].replace("{s}", "*"))
+        if self._needs_csp(request, resp):
+            resp['Content-Security-Policy'] = _render_csp(self._build_csp(request, resp))
+        elif 'Content-Security-Policy' in resp:
+            del resp['Content-Security-Policy']
 
-        font_src = set()
-        if hasattr(request, 'event'):
-            for font in get_fonts(request.event, pdf_support_required=False).values():
-                for path in list(nested_dict_values(font)):
-                    font_location = urlparse(path)
-                    if font_location.scheme and font_location.netloc:
-                        font_src.add('{}://{}'.format(font_location.scheme, font_location.netloc))
+        return resp
+
+    def _needs_csp(self, request, resp):
+        if "Content-Type" in resp and resp["Content-Type"].split(";")[0] in self.SAFE_TYPES:
+            return False
+
+        if getattr(resp, '_csp_ignore', False):
+            return False
+
+        return True
+
+    def _build_csp(self, request, resp):
+        url = resolve(request.path_info)
 
         h = {
             'default-src': ["{static}"],
-            'script-src': ['{static}'],
+            'script-src': ["{static}"],
             'object-src': ["'none'"],
             'frame-src': ['{static}'],
             'style-src': ["{static}", "{media}"],
-            'connect-src': ["{dynamic}", "{media}"],
-            'img-src': ["{static}", "{media}", "data:"] + img_src,
-            'font-src': ["{static}"] + list(font_src),
+            'connect-src': ["{static}", "{dynamic}", "{media}"],
+            'img-src': ["{static}", "{media}", "data:"],
+            'font-src': ["{static}"],
             'media-src': ["{static}", "data:"],
             # form-action is not only used to match on form actions, but also on URLs
             # form-actions redirect to. In the context of e.g. payment providers or
@@ -295,6 +404,19 @@ class SecurityMiddleware(MiddlewareMixin):
             # this. However, we'll restrict it to HTTPS.
             'form-action': ["{dynamic}", "https:"] + (['http:'] if settings.SITE_URL.startswith('http://') else []),
         }
+
+        gs = global_settings_object(request)
+        if gs.settings.leaflet_tiles:
+            h['img-src'].append(gs.settings.leaflet_tiles[:gs.settings.leaflet_tiles.index("/", 10)].replace("{s}", "*"))
+
+        if hasattr(request, 'event'):
+            h['font-src'] += list(self._get_font_origins(request.event))
+
+        if settings.VITE_DEV_MODE:
+            h['script-src'] += ["http://localhost:5173", "ws://localhost:5173"]
+            h['style-src'] += ["'unsafe-inline'"]
+            h['connect-src'] += ["http://localhost:5173", "ws://localhost:5173"]
+
         # Only include pay.google.com for wallet detection purposes on the Payment selection page
         if (
                 url.url_name == "event.order.pay.change" or
@@ -303,27 +425,35 @@ class SecurityMiddleware(MiddlewareMixin):
             h['script-src'].append('https://pay.google.com')
             h['frame-src'].append('https://pay.google.com')
             h['connect-src'].append('https://google.com/pay')
+
         if settings.LOG_CSP:
             h['report-uri'] = ["/csp_report/"]
+
+        if request._csp_to_merge:
+            _merge_csp(h, request._csp_to_merge)
+
         if 'Content-Security-Policy' in resp:
             _merge_csp(h, _parse_csp(resp['Content-Security-Policy']))
+
         if settings.CSP_ADDITIONAL_HEADER:
             _merge_csp(h, _parse_csp(settings.CSP_ADDITIONAL_HEADER))
 
-        staticdomain = "'self'"
-        dynamicdomain = "'self'"
-        mediadomain = "'self'"
+        placeholders = {
+            "{static}": ["'self'"],
+            "{dynamic}": ["'self'"],
+            "{media}": ["'self'"],
+        }
         if settings.MEDIA_URL.startswith('http'):
-            mediadomain += " " + settings.MEDIA_URL[:settings.MEDIA_URL.find('/', 9)]
+            placeholders["{media}"].append(settings.MEDIA_URL[:settings.MEDIA_URL.find('/', 9)])
         if settings.STATIC_URL.startswith('http'):
-            staticdomain += " " + settings.STATIC_URL[:settings.STATIC_URL.find('/', 9)]
+            placeholders["{static}"].append(settings.STATIC_URL[:settings.STATIC_URL.find('/', 9)])
         if settings.SITE_URL.startswith('http'):
             if settings.SITE_URL.find('/', 9) > 0:
-                staticdomain += " " + settings.SITE_URL[:settings.SITE_URL.find('/', 9)]
-                dynamicdomain += " " + settings.SITE_URL[:settings.SITE_URL.find('/', 9)]
+                placeholders["{static}"].append(settings.SITE_URL[:settings.SITE_URL.find('/', 9)])
+                placeholders["{dynamic}"].append(settings.SITE_URL[:settings.SITE_URL.find('/', 9)])
             else:
-                staticdomain += " " + settings.SITE_URL
-                dynamicdomain += " " + settings.SITE_URL
+                placeholders["{static}"].append(settings.SITE_URL)
+                placeholders["{dynamic}"].append(settings.SITE_URL)
 
         if hasattr(request, 'organizer') and request.organizer:
             if hasattr(request, 'event') and request.event:
@@ -334,18 +464,29 @@ class SecurityMiddleware(MiddlewareMixin):
                 siteurlsplit = urlsplit(settings.SITE_URL)
                 if siteurlsplit.port and siteurlsplit.port not in (80, 443):
                     domain = '%s:%d' % (domain, siteurlsplit.port)
-                dynamicdomain += " " + domain
+                placeholders["{dynamic}"].append(domain)
 
-        if request.path not in self.CSP_EXEMPT and not getattr(resp, '_csp_ignore', False):
-            resp['Content-Security-Policy'] = _render_csp(h).format(static=staticdomain, dynamic=dynamicdomain,
-                                                                    media=mediadomain)
-            for k, v in h.items():
-                h[k] = sorted(set(' '.join(v).format(static=staticdomain, dynamic=dynamicdomain, media=mediadomain).split(' ')))
-            resp['Content-Security-Policy'] = _render_csp(h)
-        elif 'Content-Security-Policy' in resp:
-            del resp['Content-Security-Policy']
+        for k, v in h.items():
+            h[k] = sorted(set(result for part in v for result in placeholders.get(part, [part])))
 
-        return resp
+        return h
+
+    def _get_font_origins(self, event):
+        def nested_dict_values(d):
+            for v in d.values():
+                if isinstance(v, dict):
+                    yield from nested_dict_values(v)
+                else:
+                    if isinstance(v, str):
+                        yield v
+
+        font_src = set()
+        for font in get_fonts(event, pdf_support_required=False).values():
+            for path in list(nested_dict_values(font)):
+                font_location = urlparse(path)
+                if font_location.scheme and font_location.netloc:
+                    font_src.add('{}://{}'.format(font_location.scheme, font_location.netloc))
+        return font_src
 
 
 class RejectInvalidInputMiddleware(MiddlewareMixin):

src/pretix/base/migrations/0299_itemprogramtime_location.py

@@ -0,0 +1,19 @@
+# Generated by Django 4.2.27 on 2026-01-21 12:06
+
+import i18nfield.fields
+from django.db import migrations
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ("pretixbase", "0298_pluggable_permissions"),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name="itemprogramtime",
+            name="location",
+            field=i18nfield.fields.I18nTextField(max_length=200, null=True),
+        )
+    ]

src/pretix/base/migrations/0300_add_reusablemedium_label.py

@@ -0,0 +1,35 @@
+# Generated by Django 4.2.26 on 2025-11-24 11:32
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ("pretixbase", "0299_itemprogramtime_location"),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name="reusablemedium",
+            name="claim_token",
+            field=models.CharField(max_length=200, null=True),
+        ),
+        migrations.AddField(
+            model_name="reusablemedium",
+            name="label",
+            field=models.CharField(max_length=200, null=True),
+        ),
+        # use temporary related_name "linked_mediums" for ManyToManyField, so we can migrate existing data
+        migrations.AddField(
+            model_name="reusablemedium",
+            name="linked_orderpositions",
+            field=models.ManyToManyField(
+                related_name="linked_mediums", to="pretixbase.orderposition"
+            ),
+        ),
+        migrations.RunSQL(
+            sql="INSERT INTO pretixbase_reusablemedium_linked_orderpositions (reusablemedium_id, orderposition_id) SELECT id, linked_orderposition_id FROM pretixbase_reusablemedium WHERE linked_orderposition_id IS NOT NULL;",
+            reverse_sql="DELETE FROM pretixbase_reusablemedium_linked_orderpositions;",
+        ),
+    ]

src/pretix/base/migrations/0301_reusablemedium_remove_orderposition.py

@@ -0,0 +1,44 @@
+# Generated by Django 4.2.26 on 2025-11-24 11:32
+
+from django.db import migrations, models
+
+
+def reverse(apps, schema_editor):
+    ReusableMedium = apps.get_model('pretixbase', 'ReusableMedium')
+
+    qs = ReusableMedium.linked_orderpositions.through.objects
+    objs = []
+    # get last added orderposition from linked_orderpositions
+    for rm_id, op_id in qs.filter(id__in=qs.values("reusablemedium_id").annotate(max_id=models.Max('id')).values('max_id')).values_list("reusablemedium_id", "orderposition_id"):
+        obj = ReusableMedium(
+            id=rm_id,
+            linked_orderposition_id=op_id,
+        )
+        objs.append(obj)
+
+    ReusableMedium.objects.bulk_update(objs, ['linked_orderposition_id'])
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ("pretixbase", "0300_add_reusablemedium_label"),
+    ]
+
+    operations = [
+        # according to the docs, UPDATE FROM should run similarly on sqlite and postgres, but I could not get it to work
+        # so roll back the data migration with code before deleting data from through-table in 0297
+        migrations.RunPython(migrations.RunPython.noop, reverse),
+        migrations.RemoveField(
+            model_name="reusablemedium",
+            name="linked_orderposition",
+        ),
+        # change related_name for new ManyToManyField to previously used linked_media
+        migrations.AlterField(
+            model_name="reusablemedium",
+            name="linked_orderpositions",
+            field=models.ManyToManyField(
+                related_name="linked_media", to="pretixbase.orderposition"
+            ),
+        ),
+    ]

src/pretix/base/migrations/0302_resolve_duplicate_codes_and_secrets.py

@@ -0,0 +1,58 @@
+# Generated by Django 4.2.8 on 2024-07-01 09:27
+import logging
+
+from django.db import migrations
+from django.db.models import Count
+
+logger = logging.getLogger(__name__)
+
+
+def clean_duplicate_secrets(apps, schema_editor):
+    # This will autofix all possible duplicate Order.code and OrderPosition.secret values,
+    # unless Order.code is already too long to append something. This would need to be fixed by
+    # sysadmins manually.
+    OrderPosition = apps.get_model("pretixbase", "OrderPosition")
+    Order = apps.get_model("pretixbase", "Order")
+
+    qs = OrderPosition.all.values("secret", "order__event__organizer_id").order_by().annotate(c=Count("*")).filter(c__gt=1)
+    for row in qs:
+        affected = OrderPosition.all.filter(
+            **{k: v for k, v in row.items() if k != "c"}
+        ).order_by("pk")
+        logger.error(f"Found {row['c']} tickets with with the same secret \"{row['secret']}\" in organizer {row['order__event__organizer_id']}, all except one will be changed")
+        for i, a in enumerate(affected):
+            if i > 0:
+                a.secret = a.secret + "__dupl__" + str(a.pk)
+                logger.info(
+                    f"Ticket {a.pk} has new secret {a.secret}"
+                )
+            a.save(update_fields=["organizer_id", "secret"])
+
+    qs = Order.objects.values("code", "event__organizer_id").order_by().annotate(c=Count("*")).filter(c__gt=1)
+    for row in qs:
+        affected = Order.objects.filter(
+            **{k: v for k, v in row.items() if k != "c"}
+        ).order_by("pk")
+        logger.error(f"Found {row['c']} orders with with the same code \"{row['code']}\" in organizer {row['event__organizer_id']}, all except one will be changed")
+        for i, a in enumerate(affected):
+            if i > 0:
+                if len(a.code) > 16 - len(str(a.pk)):
+                    raise ValueError(f"Cannot auto-fix order with duplicate code {a.code}, order code is too long already")
+                a.code = a.code + str(a.pk).zfill(16 - len(a.code))
+                logger.info(
+                    f"Order {a.pk} has new code {a.code}"
+                )
+            a.save(update_fields=["organizer_id", "code"])
+
+
+class Migration(migrations.Migration):
+    dependencies = [
+        (
+            "pretixbase",
+            "0301_reusablemedium_remove_orderposition",
+        ),
+    ]
+
+    operations = [
+        migrations.RunPython(clean_duplicate_secrets, migrations.RunPython.noop),
+    ]

src/pretix/base/migrations/0303_alter_order_organizer_alter_orderposition_organizer.py

@@ -0,0 +1,46 @@
+# Generated by Django 4.2.8 on 2024-07-01 09:27
+
+import django.db.models.deletion
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+    dependencies = [
+        (
+            "pretixbase",
+            "0302_resolve_duplicate_codes_and_secrets",
+        ),
+    ]
+
+    operations = [
+        migrations.RunSQL(
+            "UPDATE pretixbase_order "
+            "SET organizer_id = (SELECT e.organizer_id FROM pretixbase_event e WHERE e.id = pretixbase_order.event_id) "
+            "WHERE pretixbase_order.organizer_id IS NULL;",
+            migrations.RunSQL.noop,
+        ),
+        migrations.RunSQL(
+            "UPDATE pretixbase_orderposition "
+            "SET organizer_id = (SELECT e.organizer_id FROM pretixbase_order o LEFT JOIN pretixbase_event e ON e.id = o.event_id WHERE o.id = pretixbase_orderposition.order_id) "
+            "WHERE pretixbase_orderposition.organizer_id IS NULL;",
+            migrations.RunSQL.noop,
+        ),
+        migrations.AlterField(
+            model_name="order",
+            name="organizer",
+            field=models.ForeignKey(
+                on_delete=django.db.models.deletion.CASCADE,
+                related_name="orders",
+                to="pretixbase.organizer",
+            ),
+        ),
+        migrations.AlterField(
+            model_name="orderposition",
+            name="organizer",
+            field=models.ForeignKey(
+                on_delete=django.db.models.deletion.CASCADE,
+                related_name="order_positions",
+                to="pretixbase.organizer",
+            ),
+        ),
+    ]

src/pretix/base/migrations/0304_tax_rate_decimals.py

@@ -0,0 +1,48 @@
+# Generated by Django 5.2.12 on 2026-04-15 20:10
+
+from decimal import Decimal
+
+from django.db import migrations, models
+
+import pretix.helpers.models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('pretixbase', '0303_alter_order_organizer_alter_orderposition_organizer'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='cartposition',
+            name='tax_rate',
+            field=pretix.helpers.models.NormalizedDecimalField(decimal_places=4, default=Decimal('0'), max_digits=7),
+        ),
+        migrations.AlterField(
+            model_name='invoiceline',
+            name='tax_rate',
+            field=pretix.helpers.models.NormalizedDecimalField(decimal_places=4, default=Decimal('0'), max_digits=7),
+        ),
+        migrations.AlterField(
+            model_name='orderfee',
+            name='tax_rate',
+            field=pretix.helpers.models.NormalizedDecimalField(decimal_places=4, max_digits=7),
+        ),
+        migrations.AlterField(
+            model_name='orderposition',
+            name='tax_rate',
+            field=pretix.helpers.models.NormalizedDecimalField(decimal_places=4, max_digits=7),
+        ),
+        migrations.AlterField(
+            model_name='transaction',
+            name='tax_rate',
+            field=pretix.helpers.models.NormalizedDecimalField(decimal_places=4, max_digits=7),
+        ),
+        migrations.AlterField(
+            model_name='taxrule',
+            name='rate',
+            field=pretix.helpers.models.NormalizedDecimalField(decimal_places=4, max_digits=7),
+        ),
+
+    ]

src/pretix/base/migrations/0305_fixup_eventmetaproperties.py

@@ -0,0 +1,91 @@
+# Generated by Django 5.2.12 on 2026-04-28 11:34
+import logging
+
+from django.db import IntegrityError, migrations, transaction
+from django.db.models import Count, F
+
+logger = logging.getLogger(__name__)
+
+
+def fix_cross_organizer_eventmetavalues(apps, schema_editor):
+    EventMetaProperty = apps.get_model("pretixbase", "EventMetaProperty")
+    EventMetaValue = apps.get_model("pretixbase", "EventMetaValue")
+
+    cross_org_values = EventMetaValue.objects.filter(
+        event__organizer__pk__ne=F('property__organizer__pk')
+    ).order_by('event__organizer__slug', 'event__slug')
+    for emv in cross_org_values:
+        logger.warning("%s", f"Fixing cross-organizer EventMetaValue: {emv.event.organizer.slug}/{emv.event.slug}")
+        logger.warning("  %s", f"{emv.property.name}({emv.property.id}@{emv.property.organizer.slug}) = {repr(emv.value)}")
+        try:
+            emv.property = emv.event.organizer.meta_properties.get(name=emv.property.name)
+            if EventMetaValue.objects.filter(event=emv.event, property=emv.property).exists():
+                correct = EventMetaValue.objects.get(event=emv.event, property=emv.property)
+                if correct.value != emv.value:
+                    logger.warning("  %s", f"WARN: conflicting EventMetaValue with property in correct organizer already exists, deleting the cross-organizer one")
+                else:
+                    logger.warning("  %s", f"OK: same-value EventMetaValue with property in correct organizer already exists, deleting the cross-organizer one")
+                logger.warning("  %s", f"keeping: {correct.property.name}({correct.property.id}@{correct.property.organizer.slug}) = {repr(correct.value)}")
+                emv.delete()
+            else:
+                logger.warning("  %s", f"OK: found existing EventMetaProperty in {emv.event.organizer.slug}, updating reference")
+                logger.warning("  %s", f"after: {emv.property.name}({emv.property.id}@{emv.property.organizer.slug}) = {repr(emv.value)}")
+                emv.save(update_fields=["property"])
+        except EventMetaProperty.DoesNotExist:
+            meta_prop = emv.property
+            meta_prop.pk = None
+            meta_prop.organizer = emv.event.organizer
+            meta_prop.filter_public = False
+            meta_prop.save(force_insert=True)
+            logger.warning("  %s", f"WARN: found no matching EventMetaProperty, creating")
+            logger.warning("  %s", f"after: {emv.property.name}({emv.property.id}@{emv.property.organizer.slug}) = {repr(emv.value)}")
+            emv.save(update_fields=["property"])
+
+
+def make_eventmetaproperties_unique(apps, schema_editor):
+    EventMetaProperty = apps.get_model("pretixbase", "EventMetaProperty")
+    EventMetaValue = apps.get_model("pretixbase", "EventMetaValue")
+
+    duplicates = EventMetaProperty.objects.values('organizer', 'organizer__slug', 'name').annotate(count=Count('id')).filter(count__gt=1)
+    for dup in duplicates:
+        logger.warning("%s", f"Fixup duplicate property {dup['organizer__slug']} {dup['name']}")
+        props = list(EventMetaProperty.objects.filter(organizer=dup['organizer'], name=dup['name']))
+
+        target = props[0]
+        invalid = props[1:]
+
+        try:
+            with transaction.atomic():
+                affected = EventMetaValue.objects.filter(
+                    event__organizer=dup['organizer'], property__in=invalid
+                ).update(
+                    property=target
+                )
+                logger.warning("%s", f"  Switching {affected} value(s) over to {target.name}({target.id}@{target.organizer.slug})")
+
+        except IntegrityError as e:
+            logger.warning("%s", f"  Failed to switch all value(s) over to {target.name}({target.id}@{target.organizer.slug})")
+            logger.warning("%s", f"  {e}")
+            for prop in invalid:
+                newname = f'{prop.name}_DUPLICATE_{prop.id}'
+                logger.warning("%s", f"  Renaming {prop.name}({prop.id}@{prop.organizer.slug}) to {newname}({prop.id}@{prop.organizer.slug})")
+                prop.name = newname
+                prop.filter_public = False
+                prop.save()
+
+        else:
+            for prop in invalid:
+                logger.warning("%s", f"  Deleting {prop.name}({prop.id}@{prop.organizer.slug})")
+                prop.delete()
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ("pretixbase", "0304_tax_rate_decimals"),
+    ]
+
+    operations = [
+        migrations.RunPython(fix_cross_organizer_eventmetavalues, migrations.RunPython.noop),
+        migrations.RunPython(make_eventmetaproperties_unique, migrations.RunPython.noop),
+    ]

src/pretix/base/migrations/0306_alter_eventmetaproperty_unique_together.py

@@ -0,0 +1,17 @@
+# Generated by Django 5.2.12 on 2026-04-28 11:34
+
+from django.db import migrations
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ("pretixbase", "0305_fixup_eventmetaproperties"),
+    ]
+
+    operations = [
+        migrations.AlterUniqueTogether(
+            name="eventmetaproperty",
+            unique_together={("organizer", "name")},
+        ),
+    ]

src/pretix/base/modelimport_orders.py

@@ -442,7 +442,7 @@ class AttendeeState(ImportColumn):
 
     @property
     def verbose_name(self):
-        return _('Attendee address') + ': ' + _('State')
+        return _('Attendee address') + ': ' + pgettext('address', 'State')
 
     def clean(self, value, previous_values):
         if value:

src/pretix/base/models/auth.py

@@ -57,7 +57,7 @@ from django_otp.models import Device
 from django_scopes import scopes_disabled
 
 from pretix.base.i18n import language
-from pretix.helpers.urls import build_absolute_uri
+from pretix.helpers.urls import mainreverse_absolute
 
 from ...helpers.countries import FastCountryField
 from ...helpers.u2f import pub_key_from_der, websafe_decode
@@ -373,12 +373,12 @@ class User(AbstractBaseUser, PermissionsMixin, LoggingMixin):
 
         mail(
             email or self.email,
-            _('Account information changed'),
+            _('Changes to your account'),
             'pretixcontrol/email/security_notice.txt',
             {
                 'user': self,
                 'messages': msg,
-                'url': build_absolute_uri('control:user.settings'),
+                'url': mainreverse_absolute('control:user.settings'),
                 'instance': settings.PRETIX_INSTANCE_NAME,
             },
             event=None,
@@ -400,12 +400,13 @@ class User(AbstractBaseUser, PermissionsMixin, LoggingMixin):
 
         with language(self.locale):
             if reason == 'email_change':
-                msg = str(_('to confirm changing your email address from {old_email}\nto {new_email}, use the following code:').format(
+                msg = str(_('To change your email address from {old_email} to {new_email}, use the following code:').format(
                     old_email=self.email, new_email=email,
                 ))
             elif reason == 'email_verify':
-                msg = str(_('to confirm that your email address {email} belongs to your pretix account, use the following code:').format(
+                msg = str(_('To verify your email address {email} on {instance}, use the following code:').format(
                     email=self.email,
+                    instance=settings.PRETIX_INSTANCE_NAME,
                 ))
             else:
                 raise Exception('Invalid confirmation code reason')
@@ -418,7 +419,7 @@ class User(AbstractBaseUser, PermissionsMixin, LoggingMixin):
         }
         mail(
             email or self.email,
-            _('pretix confirmation code'),
+            _('Your confirmation code'),
             'pretixcontrol/email/confirmation_code.txt',
             {
                 'user': self,
@@ -462,11 +463,13 @@ class User(AbstractBaseUser, PermissionsMixin, LoggingMixin):
         from pretix.base.services.mail import mail
 
         mail(
-            self.email, _('Password recovery'), 'pretixcontrol/email/forgot.txt',
+            self.email,
+            _('Reset your password'),
+            'pretixcontrol/email/forgot.txt',
             {
                 'instance': settings.PRETIX_INSTANCE_NAME,
                 'user': self,
-                'url': (build_absolute_uri('control:auth.forgot.recover')
+                'url': (mainreverse_absolute('control:auth.forgot.recover')
                         + '?id=%d&token=%s' % (self.id, default_token_generator.make_token(self)))
             },
             None, locale=self.locale, user=self
@@ -647,25 +650,22 @@ class User(AbstractBaseUser, PermissionsMixin, LoggingMixin):
             id__in=self.teams.filter(TeamQuerySet.organizer_permission_q(permission)).values_list('organizer', flat=True)
         )
 
-    def has_active_staff_session(self, session_key=None):
+    def has_active_staff_session(self, session_key):
         """
         Returns whether or not a user has an active staff session (formerly known as superuser session)
         with the given session key.
         """
         return self.get_active_staff_session(session_key) is not None
 
-    def get_active_staff_session(self, session_key=None):
-        if not self.is_staff:
+    def get_active_staff_session(self, session_key):
+        if not self.is_staff or not session_key:
             return None
         if not hasattr(self, '_staff_session_cache'):
             self._staff_session_cache = {}
         if session_key not in self._staff_session_cache:
-            qs = StaffSession.objects.filter(
-                user=self, date_end__isnull=True
-            )
-            if session_key:
-                qs = qs.filter(session_key=session_key)
-            sess = qs.first()
+            sess = StaffSession.objects.filter(
+                user=self, date_end__isnull=True, session_key=session_key
+            ).first()
             if sess:
                 if sess.date_start < now() - timedelta(seconds=settings.PRETIX_SESSION_TIMEOUT_ABSOLUTE):
                     sess.date_end = now()

src/pretix/base/models/base.py

@@ -125,7 +125,7 @@ class LoggingMixin:
         elif isinstance(self, Event):
             event = self
             organizer_id = self.organizer_id
-        elif hasattr(self, 'event'):
+        elif hasattr(self, 'event') and self.event:
             event = self.event
             organizer_id = self.event.organizer_id
         elif hasattr(self, 'organizer_id'):

src/pretix/base/models/checkin.py

@@ -346,11 +346,14 @@ class Checkin(models.Model):
     REASON_INCOMPLETE = 'incomplete'
     REASON_ALREADY_REDEEMED = 'already_redeemed'
     REASON_AMBIGUOUS = 'ambiguous'
+    REASON_MEDIUM_INVALID = 'medium_invalid'
+    REASON_MEDIUM_EXISTS = 'medium_exists'
     REASON_ERROR = 'error'
     REASON_BLOCKED = 'blocked'
     REASON_UNAPPROVED = 'unapproved'
     REASON_INVALID_TIME = 'invalid_time'
     REASON_ANNULLED = 'annulled'
+    REASON_ALREADY_EXCHANGED = 'already_exchanged'
     REASONS = (
         (REASON_CANCELED, _('Order canceled')),
         (REASON_INVALID, _('Unknown ticket')),
@@ -366,6 +369,9 @@ class Checkin(models.Model):
         (REASON_UNAPPROVED, _('Order not approved')),
         (REASON_INVALID_TIME, _('Ticket not valid at this time')),
         (REASON_ANNULLED, _('Check-in annulled')),
+        (REASON_ALREADY_EXCHANGED, _('Ticket already exchanged')),
+        (REASON_MEDIUM_INVALID, _('Reusable medium invalid')),
+        (REASON_MEDIUM_EXISTS, _('Reusable medium already exists')),
     )
 
     successful = models.BooleanField(

src/pretix/base/models/customers.py

@@ -167,7 +167,7 @@ class Customer(LoggedModel):
 
     def send_security_notice(self, message, email=None):
         from pretix.base.services.mail import SendMailException, mail
-        from pretix.multidomain.urlreverse import build_absolute_uri
+        from pretix.multidomain.urlreverse import eventreverse_absolute
 
         try:
             with language(self.locale):
@@ -178,7 +178,7 @@ class Customer(LoggedModel):
                     {
                         **self.get_email_context(),
                         'message': str(message),
-                        'url': build_absolute_uri(self.organizer, 'presale:organizer.customer.index')
+                        'url': eventreverse_absolute(self.organizer, 'presale:organizer.customer.index')
                     },
                     customer=self,
                     organizer=self.organizer,
@@ -299,12 +299,12 @@ class Customer(LoggedModel):
 
     def send_activation_mail(self):
         from pretix.base.services.mail import mail
-        from pretix.multidomain.urlreverse import build_absolute_uri
+        from pretix.multidomain.urlreverse import eventreverse_absolute
         from pretix.presale.forms.customer import TokenGenerator
 
         ctx = self.get_email_context()
         token = TokenGenerator().make_token(self)
-        ctx['url'] = build_absolute_uri(
+        ctx['url'] = eventreverse_absolute(
             self.organizer,
             'presale:organizer.customer.activate'
         ) + '?id=' + self.identifier + '&token=' + token
@@ -395,7 +395,7 @@ class AttendeeProfile(models.Model):
             self.company,
             self.street,
             (self.zipcode or '') + ' ' + (self.city or '') + ' ' + (self.state_for_address or ''),
-            self.country.name,
+            self.country.name if self.country else None,
         ]
         for a in self.answers:
             value = a.get('value')

src/pretix/base/models/event.py

@@ -40,6 +40,7 @@ import warnings
 from collections import Counter, OrderedDict, defaultdict
 from datetime import datetime, time, timedelta
 from operator import attrgetter
+from typing import TYPE_CHECKING
 from urllib.parse import urljoin
 from zoneinfo import ZoneInfo
 
@@ -79,10 +80,16 @@ from pretix.helpers.thumb import get_thumbnail
 from ..settings import settings_hierarkey
 from .organizer import Organizer, Team
 
+if TYPE_CHECKING:
+    from hierarkey.proxy import HierarkeyProxy
+
 logger = logging.getLogger(__name__)
 
 
 class EventMixin:
+    if TYPE_CHECKING:
+        settings: HierarkeyProxy
+
     def clean(self):
         if self.presale_start and self.presale_end and self.presale_start > self.presale_end:
             raise ValidationError({'presale_end': _('The end of the presale period has to be later than its start.')})
@@ -172,6 +179,12 @@ class EventMixin:
             self.date_to.astimezone(tz), ("D" if short else "l")
         )
 
+    def is_same_day(self):
+        if not self.date_to:
+            return True
+        else:
+            return self.date_from.astimezone(self.timezone).date() == self.date_to.astimezone(self.timezone).date()
+
     def get_date_range_display(self, tz=None, force_show_end=False, as_html=False, try_to_show_times=False) -> str:
         """
         Returns a formatted string containing the start date and the end date
@@ -225,6 +238,9 @@ class EventMixin:
 
     @property
     def timezone(self):
+        # If we get rid of the shim, verify that
+        # https://github.com/py-vobject/vobject/issues/117#issuecomment-5045645314
+        # has been released and included
         return pytz_deprecation_shim.timezone(self.settings.timezone)
 
     @property
@@ -642,7 +658,7 @@ class Event(EventMixin, LoggedModel):
     is_remote = models.BooleanField(
         default=False,
         verbose_name=_("This event is remote or partially remote."),
-        help_text=_("This will be used to let users know if the event is in a different timezone and let’s us calculate users’ local times."),
+        help_text=_("This will be used to let users know if the event is in a different timezone, and to let us calculate the local time of a user."),
     )
     geo_lat = models.FloatField(
         verbose_name=_("Latitude"),
@@ -724,7 +740,7 @@ class Event(EventMixin, LoggedModel):
 
     @property
     def social_image(self):
-        from pretix.multidomain.urlreverse import build_absolute_uri
+        from pretix.multidomain.urlreverse import eventreverse_absolute
 
         img = None
         logo_file = self.settings.get('logo_image', as_type=str, default='')[7:]
@@ -742,7 +758,7 @@ class Event(EventMixin, LoggedModel):
                 logger.exception(f'Failed to create thumbnail of {logo_file}')
                 img = default_storage.url(logo_file)
         if img:
-            return urljoin(build_absolute_uri(self, 'presale:event.index'), img)
+            return urljoin(eventreverse_absolute(self, 'presale:event.index'), img)
 
     def _seats(self, ignore_voucher=None):
         from .seating import Seat
@@ -883,6 +899,8 @@ class Event(EventMixin, LoggedModel):
             ItemProgramTime, ItemVariationMetaValue, Question, Quota,
         )
 
+        is_cross_organizer = other.organizer_id != self.organizer_id
+
         #  Note: avoid self.set_active_plugins(), it causes trouble e.g. for the badges plugin.
         #  Plugins can create data in installed() hook based on existing data of the event.
         #  Calling set_active_plugins() results in defaults being created while actually data
@@ -897,7 +915,7 @@ class Event(EventMixin, LoggedModel):
         self.save()
         self.log_action('pretix.object.cloned', data={'source': other.slug, 'source_id': other.pk})
 
-        if hasattr(other, 'alternative_domain_assignment'):
+        if hasattr(other, 'alternative_domain_assignment') and not is_cross_organizer:
             other.alternative_domain_assignment.domain.event_assignments.create(event=self)
 
         if not self.all_sales_channels:
@@ -911,6 +929,15 @@ class Event(EventMixin, LoggedModel):
             for emv in EventMetaValue.objects.filter(event=other):
                 emv.pk = None
                 emv.event = self
+                if is_cross_organizer:
+                    try:
+                        emv.property = self.organizer.meta_properties.get(name=emv.property.name)
+                    except EventMetaProperty.DoesNotExist:
+                        meta_prop = emv.property
+                        meta_prop.pk = None
+                        meta_prop.organizer = self.organizer
+                        meta_prop.save(force_insert=True)
+                        emv.property = meta_prop
                 emv.save(force_insert=True)
 
         for fl in EventFooterLink.objects.filter(event=other):
@@ -964,13 +991,13 @@ class Event(EventMixin, LoggedModel):
             if i.tax_rule_id:
                 i.tax_rule = tax_map[i.tax_rule_id]
 
-            if i.grant_membership_type and other.organizer_id != self.organizer_id:
+            if i.grant_membership_type and is_cross_organizer:
                 i.grant_membership_type = None
 
             i.save()  # no force_insert since i.picture.save could have already inserted
             i.log_action('pretix.object.cloned')
 
-            if require_membership_types and other.organizer_id == self.organizer_id:
+            if require_membership_types and not is_cross_organizer:
                 i.require_membership_types.set(require_membership_types)
 
             if not i.all_sales_channels:
@@ -985,7 +1012,7 @@ class Event(EventMixin, LoggedModel):
                 v._prefetched_objects_cache = {}
                 v.save(force_insert=True)
 
-                if require_membership_types and other.organizer_id == self.organizer_id:
+                if require_membership_types and not is_cross_organizer:
                     v.require_membership_types.set(require_membership_types)
                 if not v.all_sales_channels:
                     v.limit_sales_channels.set(self.organizer.sales_channels.filter(identifier__in=[s.identifier for s in limit_sales_channels]))
@@ -1385,15 +1412,12 @@ class Event(EventMixin, LoggedModel):
 
         for mp in self.organizer.meta_properties.all():
             if mp.required and not self.meta_data.get(mp.name):
-                issues.append(
-                    ('<a {a_attr}>' + gettext('You need to fill the meta parameter "{property}".') + '</a>').format(
-                        property=mp.name,
-                        a_attr='href="%s#id_prop-%d-value"' % (
-                            reverse('control:event.settings', kwargs={'organizer': self.organizer.slug, 'event': self.slug}),
-                            mp.pk
-                        )
-                    )
-                )
+                issues.append(format_html(
+                    '<a href="{href}{href_hash}">{text}</a>',
+                    text=gettext('You need to fill the meta parameter "{property}".').format(property=mp.name),
+                    href=reverse('control:event.settings', kwargs={'organizer': self.organizer.slug, 'event': self.slug}),
+                    href_hash=f'#id_prop-{mp.pk}-value',
+                ))
 
         responses = event_live_issues.send(self)
         for receiver, response in sorted(responses, key=lambda r: str(r[0])):
@@ -1836,6 +1860,7 @@ class EventMetaProperty(LoggedModel):
 
     class Meta:
         ordering = ("position", "name",)
+        unique_together = ('organizer', 'name')
 
     @property
     def choice_keys(self):
@@ -1869,6 +1894,8 @@ class EventMetaValue(LoggedModel):
             self.event.cache.clear()
 
     def save(self, *args, **kwargs):
+        if self.event and self.event.organizer != self.property.organizer:
+            raise ValidationError(_("Property and event must belong to the same organizer."))
         super().save(*args, **kwargs)
         if self.event:
             self.event.cache.clear()

src/pretix/base/models/invoices.py

@@ -49,6 +49,7 @@ from django_scopes import ScopedManager
 
 from pretix.base.settings import COUNTRIES_WITH_STATE_IN_ADDRESS
 from pretix.helpers.countries import FastCountryField
+from pretix.helpers.models import NormalizedDecimalField
 
 
 def invoice_filename(instance, filename: str) -> str:
@@ -450,7 +451,7 @@ class InvoiceLine(models.Model):
     description = models.TextField()
     gross_value = models.DecimalField(max_digits=13, decimal_places=2)
     tax_value = models.DecimalField(max_digits=13, decimal_places=2, default=Decimal('0.00'))
-    tax_rate = models.DecimalField(max_digits=7, decimal_places=2, default=Decimal('0.00'))
+    tax_rate = NormalizedDecimalField(max_digits=7, decimal_places=4, default=Decimal('0'))
     tax_name = models.CharField(max_length=190)
     tax_code = models.CharField(max_length=190, null=True, blank=True)
     subevent = models.ForeignKey('SubEvent', null=True, blank=True, on_delete=models.PROTECT)

src/pretix/base/models/items.py

@@ -452,11 +452,16 @@ class Item(LoggedModel):
     MEDIA_POLICY_REUSE = 'reuse'
     MEDIA_POLICY_NEW = 'new'
     MEDIA_POLICY_REUSE_OR_NEW = 'reuse_or_new'
+    MEDIA_POLICY_APPEND = 'append'
+    MEDIA_POLICY_APPEND_OR_NEW = 'append_or_new'
     MEDIA_POLICIES = (
-        (None, _("Don't use re-usable media, use regular one-off tickets")),
-        (MEDIA_POLICY_REUSE, _('Require an existing medium to be re-used')),
+        (None, _("Don't use reusable media, use regular one-off tickets")),
         (MEDIA_POLICY_NEW, _('Require a previously unknown medium to be newly added')),
-        (MEDIA_POLICY_REUSE_OR_NEW, _('Require either an existing or a new medium to be used')),
+        (MEDIA_POLICY_REUSE, _('Require an existing medium to be reused, replacing any previous tickets')),
+        (MEDIA_POLICY_REUSE_OR_NEW, _('Require either an existing or a new medium to be used, replacing any previous tickets')),
+        (MEDIA_POLICY_APPEND, _('Require an existing medium to be reused, adding to any previous tickets')),
+        (MEDIA_POLICY_APPEND_OR_NEW,
+         _('Require either an existing or a new medium to be used, adding to any previous tickets')),
     )
 
     objects = ItemQuerySetManager()
@@ -769,7 +774,7 @@ class Item(LoggedModel):
         null=True, blank=True, max_length=16,
         verbose_name=_('Reusable media policy'),
         help_text=_(
-            'If this product should be stored on a re-usable physical medium, you can attach a physical media policy. '
+            'If this product should be stored on a reusable physical medium, you can attach a physical media policy. '
             'This is not required for regular tickets, which just use a one-time barcode, but only for products like '
             'renewable season tickets or re-chargeable gift card wristbands. '
             'This is an advanced feature that also requires specific configuration of ticketing and printing settings.'
@@ -778,7 +783,7 @@ class Item(LoggedModel):
     media_type = models.CharField(
         max_length=100,
         null=True, blank=True,
-        choices=[(None, _("Don't use re-usable media, use regular one-off tickets"))] + [(k, v) for k, v in MEDIA_TYPES.items()],
+        choices=[(None, _("Don't use reusable media, use regular one-off tickets"))] + [(k, v) for k, v in MEDIA_TYPES.items()],
         verbose_name=_('Reusable media type'),
         help_text=_(
             'Select the type of physical medium that should be used for this product. Note that not all media types '
@@ -880,26 +885,6 @@ class Item(LoggedModel):
             return False
         return True
 
-    def unavailability_reason(self, now_dt: datetime=None, has_voucher=False, subevent=None) -> Optional[str]:
-        now_dt = now_dt or time_machine_now()
-        subevent_item = subevent and subevent.item_overrides.get(self.pk)
-        if not self.active:
-            return 'active'
-        elif self.available_from and self.available_from > now_dt:
-            return 'available_from'
-        elif self.available_until and self.available_until < now_dt:
-            return 'available_until'
-        elif (self.require_voucher or self.hide_without_voucher) and not has_voucher:
-            return 'require_voucher'
-        elif subevent_item and subevent_item.available_from and subevent_item.available_from > now_dt:
-            return 'available_from'
-        elif subevent_item and subevent_item.available_until and subevent_item.available_until < now_dt:
-            return 'available_until'
-        elif self.hidden_if_item_available and self._dependency_available:
-            return 'hidden_if_item_available'
-        else:
-            return None
-
     def _get_quotas(self, ignored_quotas=None, subevent=None):
         check_quotas = set(getattr(
             self, '_subevent_quotas',  # Utilize cache in product list
@@ -995,6 +980,11 @@ class Item(LoggedModel):
                 raise ValidationError(_('The selected media type does not support usage for tickets currently.'))
             if not mt.supports_giftcard and issue_giftcard:
                 raise ValidationError(_('The selected media type does not support usage for gift cards currently.'))
+            if media_policy in (Item.MEDIA_POLICY_NEW, Item.MEDIA_POLICY_APPEND_OR_NEW, Item.MEDIA_POLICY_REUSE_OR_NEW):
+                if not mt.medium_created_by_server and not mt.medium_created_from_unknown_supported:
+                    raise ValidationError(_('The selected media type requires all media to be registered in the system '
+                                            'prior to their usage. Therefore, the selected media policy does not make '
+                                            'sense for this media type.'))
             if issue_giftcard:
                 raise ValidationError(_('You currently cannot create gift cards with a reusable media policy. Instead, '
                                         'gift cards for some reusable media types can be created or re-charged directly '
@@ -1403,22 +1393,6 @@ class ItemVariation(models.Model):
             return False
         return True
 
-    def unavailability_reason(self, now_dt: datetime=None, has_voucher=False, subevent=None) -> Optional[str]:
-        now_dt = now_dt or time_machine_now()
-        subevent_var = subevent and subevent.var_overrides.get(self.pk)
-        if not self.active:
-            return 'active'
-        elif self.available_from and self.available_from > now_dt:
-            return 'available_from'
-        elif self.available_until and self.available_until < now_dt:
-            return 'available_until'
-        elif subevent_var and subevent_var.available_from and subevent_var.available_from > now_dt:
-            return 'available_from'
-        elif subevent_var and subevent_var.available_until and subevent_var.available_until < now_dt:
-            return 'available_until'
-        else:
-            return None
-
     @property
     def meta_data(self):
         data = self.item.meta_data
@@ -2220,7 +2194,7 @@ class Quota(LoggedModel):
 class ItemMetaProperty(LoggedModel):
     """
     An event can have ItemMetaProperty objects attached to define meta information fields
-    for its items. This information can be re-used for example in ticket layouts.
+    for its items. This information can be reused for example in ticket layouts.
 
     :param event: The event this property is defined for.
     :type event: Event
@@ -2306,10 +2280,17 @@ class ItemProgramTime(models.Model):
     :type start: datetime
     :param end: The date and time this program time ends
     :type end: datetime
+    :param location: venue
+    :type location: str
     """
     item = models.ForeignKey('Item', related_name='program_times', on_delete=models.CASCADE)
     start = models.DateTimeField(verbose_name=_("Start"))
     end = models.DateTimeField(verbose_name=_("End"))
+    location = I18nTextField(
+        null=True, blank=True,
+        max_length=200,
+        verbose_name=_("Location"),
+    )
 
     def clean(self):
         if hasattr(self, 'item') and self.item and self.item.event.has_subevents:

src/pretix/base/models/media.py

@@ -72,6 +72,16 @@ class ReusableMedium(LoggedModel):
         max_length=200,
         verbose_name=pgettext_lazy('reusable_medium', 'Identifier'),
     )
+    claim_token = models.CharField(
+        max_length=200,
+        verbose_name=pgettext_lazy('reusable_medium', 'Claim token'),
+        null=True, blank=True
+    )
+    label = models.CharField(
+        max_length=200,
+        verbose_name=pgettext_lazy('reusable_medium', 'Label'),
+        null=True, blank=True
+    )
 
     active = models.BooleanField(
         verbose_name=_('Active'),
@@ -89,12 +99,14 @@ class ReusableMedium(LoggedModel):
         on_delete=models.SET_NULL,
         verbose_name=_('Customer account'),
     )
-    linked_orderposition = models.ForeignKey(
+    linked_orderpositions = models.ManyToManyField(
         OrderPosition,
-        null=True, blank=True,
         related_name='linked_media',
-        on_delete=models.SET_NULL,
-        verbose_name=_('Linked ticket'),
+        verbose_name=_('Linked tickets'),
+        help_text=_(
+            'If you link to more than one ticket, make sure there is no overlap in validity. '
+            'If multiple tickets are valid at once, this will lead to failed check-ins.'
+        )
     )
     linked_giftcard = models.ForeignKey(
         GiftCard,
@@ -117,7 +129,10 @@ class ReusableMedium(LoggedModel):
 
     @property
     def is_expired(self):
-        return self.expires and self.expires > now()
+        return self.expires and self.expires < now()
+
+    def touch(self):
+        self.save(update_fields=['updated'])
 
     class Meta:
         unique_together = (("identifier", "type", "organizer"),)

src/pretix/base/models/orders.py

@@ -87,6 +87,7 @@ from pretix.base.timemachine import time_machine_now
 
 from ...helpers import OF_SELF
 from ...helpers.countries import CachedCountries, FastCountryField
+from ...helpers.models import NormalizedDecimalField
 from ...helpers.names import build_name
 from ...testutils.middleware import debugflags_var
 from ._transactions import (
@@ -224,8 +225,6 @@ class Order(LockModel, LoggedModel):
         "Organizer",
         related_name="orders",
         on_delete=models.CASCADE,
-        null=True,
-        blank=True,
     )
     event = models.ForeignKey(
         Event,
@@ -329,7 +328,7 @@ class Order(LockModel, LoggedModel):
         default="line",
     )
 
-    objects = ScopedManager(OrderQuerySet.as_manager().__class__, organizer='event__organizer')
+    objects = ScopedManager(OrderQuerySet.as_manager().__class__, organizer='organizer')
 
     class Meta:
         verbose_name = _("Order")
@@ -354,38 +353,60 @@ class Order(LockModel, LoggedModel):
     def _transaction_key_reset(self):
         self.__initial_status_paid_or_pending = self.status in (Order.STATUS_PENDING, Order.STATUS_PAID) and not self.require_approval
 
-    def gracefully_delete(self, user=None, auth=None):
-        from . import GiftCard, GiftCardTransaction, Membership, Voucher
-
-        if not self.testmode:
-            raise TypeError("Only test mode orders can be deleted.")
-        self.log_action(
-            'pretix.event.order.deleted', user=user, auth=auth,
-            data={
-                'code': self.code,
-            }
+    @classmethod
+    def gracefully_delete_bulk(cls, event, orders, user=None, auth=None):
+        # Expects to be called in a transaction
+        from . import (
+            GiftCard, GiftCardTransaction, LogEntry, Membership, Voucher,
         )
 
-        order_gracefully_delete.send(self.event, order=self)
+        if not transaction.get_connection().in_atomic_block:
+            raise Exception('gracefully_delete_bulk should only be called in atomic transaction!')
 
-        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))
+        logs_create = []
+        for o in orders:
+            if not o.testmode:
+                raise TypeError("Only test mode orders can be deleted.")
+            order_gracefully_delete.send(event, order=o)
+            logs_create.append(o.log_action(
+                'pretix.event.order.deleted', user=user, auth=auth,
+                data={
+                    'code': o.code,
+                },
+                save=False,
+            ))
+        LogEntry.bulk_create_and_postprocess(logs_create)
 
-        GiftCardTransaction.objects.filter(payment__in=self.payments.all()).update(payment=None)
-        GiftCardTransaction.objects.filter(refund__in=self.refunds.all()).update(refund=None)
-        GiftCardTransaction.objects.filter(order=self).update(order=None)
-        GiftCard.objects.filter(issued_in__in=self.positions.all()).update(issued_in=None)
-        Membership.objects.filter(granted_in__order=self, testmode=True).update(granted_in=None)
-        OrderPosition.all.filter(order=self, addon_to__isnull=False).delete()
-        OrderPosition.all.filter(order=self).delete()
-        OrderFee.all.filter(order=self).delete()
-        Transaction.objects.filter(order=self).delete()
-        self.refunds.all().delete()
-        self.payments.all().delete()
-        self.event.cache.delete('complain_testmode_orders')
-        self.delete()
+        voucher_ids = OrderPosition.objects.filter(
+            order__in=orders,
+            voucher__isnull=False
+        ).exclude(order__status=Order.STATUS_CANCELED).values_list("voucher_id", flat=True)
+        voucher_usages = Counter(voucher_ids)
+        for v_id, usage_count in voucher_usages.items():
+            Voucher.objects.filter(pk=v_id).update(redeemed=Greatest(0, F('redeemed') - usage_count))
+
+        GiftCardTransaction.objects.filter(payment__order__in=orders).update(payment=None)
+        GiftCardTransaction.objects.filter(refund__order__in=orders).update(refund=None)
+        GiftCardTransaction.objects.filter(order__in=orders).update(order=None)
+        GiftCard.objects.filter(issued_in__order__in=orders).update(issued_in=None)
+        Membership.objects.filter(granted_in__order__in=orders, testmode=True).update(granted_in=None)
+        OrderPosition.all.filter(order__in=orders, addon_to__isnull=False).delete()
+        OrderPosition.all.filter(order__in=orders).delete()
+        OrderFee.all.filter(order__in=orders).delete()
+        Transaction.objects.filter(order__in=orders).delete()
+        OrderRefund.objects.filter(order__in=orders).delete()
+        OrderPayment.objects.filter(order__in=orders).delete()
+        if isinstance(orders, models.QuerySet):
+            orders.delete()
+        else:
+            Order.objects.filter(pk__in=[o.pk for o in orders]).delete()
+        event.cache.delete('complain_testmode_orders')
+
+    def gracefully_delete(self, user=None, auth=None):
+        if not self.testmode:
+            raise TypeError("Only test mode orders can be deleted.")
+
+        Order.gracefully_delete_bulk(self.event, Order.objects.filter(pk=self.pk), user, auth)
 
     def email_confirm_secret(self):
         return self.tagged_secret("email_confirm", 9)
@@ -1675,7 +1696,7 @@ class AbstractPosition(RoundingCorrectionMixin, models.Model):
             self.company,
             self.street,
             (self.zipcode or '') + ' ' + (self.city or '') + ' ' + (self.state_for_address or ''),
-            self.country.name
+            self.country.name if self.country else ''
         ]
         lines = [r.strip() for r in lines if r]
         return '\n'.join(lines).strip()
@@ -2265,9 +2286,12 @@ class OrderRefund(models.Model):
         super().save(*args, **kwargs)
 
 
-class ActivePositionManager(ScopedManager(organizer='order__event__organizer').__class__):
-    def get_queryset(self):
-        return super().get_queryset().filter(canceled=False)
+def ActivePositionManager(**scope):
+    class InnerClass(ScopedManager(**scope).__class__):
+        def get_queryset(self):
+            return super().get_queryset().filter(canceled=False)
+
+    return InnerClass()
 
 
 class OrderFee(RoundingCorrectionMixin, models.Model):
@@ -2334,8 +2358,8 @@ class OrderFee(RoundingCorrectionMixin, models.Model):
     )
     description = models.CharField(max_length=190, blank=True)
     internal_type = models.CharField(max_length=255, blank=True)
-    tax_rate = models.DecimalField(
-        max_digits=7, decimal_places=2,
+    tax_rate = NormalizedDecimalField(
+        max_digits=7, decimal_places=4,
         verbose_name=_('Tax rate')
     )
     tax_rule = models.ForeignKey(
@@ -2357,7 +2381,7 @@ class OrderFee(RoundingCorrectionMixin, models.Model):
     canceled = models.BooleanField(default=False)
 
     all = ScopedManager(organizer='order__event__organizer')
-    objects = ActivePositionManager()
+    objects = ActivePositionManager(organizer='order__event__organizer')
 
     @property
     def net_value(self):
@@ -2519,8 +2543,6 @@ class OrderPosition(AbstractPosition):
         "Organizer",
         related_name="order_positions",
         on_delete=models.CASCADE,
-        null=True,
-        blank=True,
     )
     order = models.ForeignKey(
         Order,
@@ -2533,8 +2555,8 @@ class OrderPosition(AbstractPosition):
         max_digits=13, decimal_places=2, null=True, blank=True,
     )
 
-    tax_rate = models.DecimalField(
-        max_digits=7, decimal_places=2,
+    tax_rate = NormalizedDecimalField(
+        max_digits=7, decimal_places=4,
         verbose_name=_('Tax rate')
     )
     tax_rule = models.ForeignKey(
@@ -2577,8 +2599,8 @@ class OrderPosition(AbstractPosition):
         blank=True,
     )
 
-    all = ScopedManager(organizer='order__event__organizer')
-    objects = ActivePositionManager()
+    all = ScopedManager(organizer='organizer')
+    objects = ActivePositionManager(organizer='organizer')
 
     def __init__(self, *args, **kwargs):
         super().__init__(*args, **kwargs)
@@ -3052,8 +3074,8 @@ class Transaction(models.Model):
     price_includes_rounding_correction = models.DecimalField(
         max_digits=13, decimal_places=2, default=Decimal("0.00")
     )
-    tax_rate = models.DecimalField(
-        max_digits=7, decimal_places=2,
+    tax_rate = NormalizedDecimalField(
+        max_digits=7, decimal_places=4,
         verbose_name=_('Tax rate')
     )
     tax_rule = models.ForeignKey(
@@ -3168,8 +3190,8 @@ class CartPosition(AbstractPosition):
         verbose_name=_("Limit for extending expiration date"),
         null=True
     )
-    tax_rate = models.DecimalField(
-        max_digits=7, decimal_places=2, default=Decimal('0.00'),
+    tax_rate = NormalizedDecimalField(
+        max_digits=7, decimal_places=4, default=Decimal('0'),
         verbose_name=_('Tax rate')
     )
     tax_code = models.CharField(
@@ -3416,7 +3438,7 @@ class InvoiceAddress(models.Model):
             self.name,
             self.street,
             (self.zipcode or '') + ' ' + (self.city or '') + ' ' + (self.state_for_address or ''),
-            self.country.name,
+            self.country.name if self.country else '',
             self.vat_id,
             self.custom_field,
             self.internal_reference,

src/pretix/base/models/organizer.py

@@ -35,6 +35,7 @@ import operator
 import string
 from datetime import date, datetime, time
 from functools import reduce
+from typing import TYPE_CHECKING
 
 import pytz_deprecation_shim
 from django.conf import settings
@@ -61,6 +62,9 @@ from ...helpers.permission_migration import (
 from ..settings import settings_hierarkey
 from .auth import User
 
+if TYPE_CHECKING:
+    from hierarkey.proxy import HierarkeyProxy
+
 
 @settings_hierarkey.add(cache_namespace='organizer')
 class Organizer(LoggedModel):
@@ -78,6 +82,9 @@ class Organizer(LoggedModel):
     """
 
     settings_namespace = 'organizer'
+    if TYPE_CHECKING:
+        settings: HierarkeyProxy
+
     name = models.CharField(max_length=200,
                             verbose_name=_("Name"))
     slug = models.CharField(

src/pretix/base/models/seating.py

@@ -118,7 +118,10 @@ class SeatingPlan(LoggedModel):
         for zi, z in enumerate(self.layout_data['zones']):
             zpos = (z['position']['x'], z['position']['y'])
             for ri, r in enumerate(z['rows']):
-                rpos = (zpos[0] + r['position']['x'], zpos[1] + r['position']['y'])
+                rpos = (
+                    zpos[0] + r.get('position', {}).get('x', 0),
+                    zpos[1] + r.get('position', {}).get('y', 0),
+                )
                 row_label = None
                 if r.get('row_label'):
                     row_label = r['row_label'].replace("%s", r.get('row_number', str(ri)))
@@ -147,8 +150,8 @@ class SeatingPlan(LoggedModel):
                         zone=z['name'],
                         category=s['category'],
                         sorting_rank=rank,
-                        x=rpos[0] + s['position']['x'],
-                        y=rpos[1] + s['position']['y'],
+                        x=rpos[0] + s.get('position', {}).get('x', 0),
+                        y=rpos[1] + s.get('position', {}).get('y', 0),
                     )
 
 

src/pretix/base/models/tax.py

@@ -40,6 +40,7 @@ from pretix.base.decimal import round_decimal
 from pretix.base.models.base import LoggedModel
 from pretix.base.templatetags.money import money_filter
 from pretix.helpers.countries import FastCountryField
+from pretix.helpers.models import NormalizedDecimalField
 
 
 class TaxedPrice:
@@ -335,9 +336,9 @@ class TaxRule(LoggedModel):
         max_length=190,
         choices=TAX_CODE_LISTS,
     )
-    rate = models.DecimalField(
-        max_digits=10,
-        decimal_places=2,
+    rate = NormalizedDecimalField(
+        max_digits=7,
+        decimal_places=4,
         validators=[
             MaxValueValidator(
                 limit_value=Decimal("100.00"),

src/pretix/base/models/vouchers.py

@@ -32,8 +32,10 @@
 # Unless required by applicable law or agreed to in writing, software distributed under the Apache License 2.0 is
 # distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 # License for the specific language governing permissions and limitations under the License.
-
+import datetime
+from dataclasses import dataclass
 from decimal import ROUND_HALF_UP, Decimal
+from typing import Union
 
 from django.conf import settings
 from django.core.exceptions import ValidationError
@@ -421,27 +423,33 @@ class Voucher(LoggedModel):
         return False
 
     @staticmethod
-    def clean_quota_get_ignored(old_instance):
-        quotas = set()
-        was_valid = old_instance and (
-            old_instance.valid_until is None or old_instance.valid_until >= now()
-        )
-        if old_instance and old_instance.block_quota and was_valid:
-            if old_instance.quota:
-                quotas.add(old_instance.quota)
-            elif old_instance.variation:
-                quotas |= set(old_instance.variation.quotas.filter(subevent=old_instance.subevent))
-            elif old_instance.item:
-                if old_instance.item.has_variations:
-                    quotas |= set(
-                        Quota.objects.filter(pk__in=Quota.variations.through.objects.filter(
-                            itemvariation__item=old_instance.item,
-                            quota__subevent=old_instance.subevent,
-                        ).values('quota_id'))
-                    )
-                else:
-                    quotas |= set(old_instance.item.quotas.filter(subevent=old_instance.subevent))
-        return quotas
+    def get_affected_quotas(quota, item, variation, subevent):
+        if quota:
+            return {quota}
+        elif item and variation:
+            return set(variation.quotas.filter(subevent=subevent))
+        elif item and not item.has_variations:
+            return set(item.quotas.filter(subevent=subevent))
+        elif item and item.has_variations:
+            return set(
+                Quota.objects.filter(
+                    pk__in=Quota.variations.through.objects.filter(
+                        itemvariation__item=item,
+                        quota__subevent=subevent,
+                    ).values('quota_id')
+                )
+            )
+        else:
+            return set()
+
+    @staticmethod
+    def clean_quota_get_ignored(voucher_data: Union["VoucherBulkData", "Voucher"]):
+        if voucher_data:
+            valid = voucher_data.valid_until is None or voucher_data.valid_until >= now()
+            if valid and voucher_data.block_quota and voucher_data.max_usages > voucher_data.redeemed:
+                return Voucher.get_affected_quotas(voucher_data.quota, voucher_data.item, voucher_data.variation, voucher_data.subevent)
+
+        return set()
 
     @staticmethod
     def clean_quota_check(data, cnt, old_instance, event, quota, item, variation):
@@ -453,22 +461,8 @@ class Voucher(LoggedModel):
         if event.has_subevents and data.get('block_quota') and not data.get('subevent'):
             raise ValidationError(_('If you want this voucher to block quota, you need to select a specific date.'))
 
-        if quota:
-            new_quotas = {quota}
-        elif item and variation:
-            new_quotas = set(variation.quotas.filter(subevent=data.get('subevent')))
-        elif item and not item.has_variations:
-            new_quotas = set(item.quotas.filter(subevent=data.get('subevent')))
-        elif item and item.has_variations:
-            new_quotas = set(
-                Quota.objects.filter(
-                    pk__in=Quota.variations.through.objects.filter(
-                        itemvariation__item=item,
-                        quota__subevent=data.get('subevent'),
-                    ).values('quota_id')
-                )
-            )
-        else:
+        new_quotas = Voucher.get_affected_quotas(quota, item, variation, data.get('subevent'))
+        if not new_quotas:
             raise ValidationError(_('You need to select a specific product or quota if this voucher should reserve '
                                     'tickets.'))
 
@@ -644,3 +638,16 @@ class Voucher(LoggedModel):
             ]
         ).aggregate(s=Sum('voucher_budget_use'))['s'] or Decimal('0.00')
         return ops
+
+
+@dataclass
+class VoucherBulkData:
+    item: object
+    variation: object
+    quota: object
+    block_quota: bool
+    valid_until: datetime.datetime
+    subevent: object
+    redeemed: int
+    max_usages: int
+    allow_ignore_quota: bool

src/pretix/base/notifications.py

@@ -43,7 +43,7 @@ from django.utils.translation import gettext_lazy as _, pgettext_lazy
 from pretix.base.models import Event, LogEntry
 from pretix.base.signals import register_notification_types
 from pretix.base.templatetags.money import money_filter
-from pretix.helpers.urls import build_absolute_uri
+from pretix.helpers.urls import mainreverse_absolute
 
 logger = logging.getLogger(__name__)
 _ALL_TYPES = None
@@ -170,7 +170,7 @@ class ParametrizedOrderNotificationType(NotificationType):
     def build_notification(self, logentry: LogEntry):
         order = logentry.content_object
 
-        order_url = build_absolute_uri(
+        order_url = mainreverse_absolute(
             'control:event.order',
             kwargs={
                 'organizer': logentry.event.organizer.slug,

src/pretix/base/payment.py

@@ -71,7 +71,7 @@ from pretix.helpers import OF_SELF
 from pretix.helpers.countries import CachedCountries
 from pretix.helpers.format import format_map
 from pretix.helpers.money import DecimalTextInput
-from pretix.multidomain.urlreverse import build_absolute_uri
+from pretix.multidomain.urlreverse import eventreverse_absolute
 from pretix.presale.views import get_cart
 from pretix.presale.views.cart import cart_session, get_or_create_cart_id
 
@@ -379,7 +379,7 @@ class BasePaymentProvider:
 
         if not self.settings.get('_hidden_seed'):
             self.settings.set('_hidden_seed', get_random_string(64))
-        hidden_url = build_absolute_uri(self.event, 'presale:event.payment.unlock', kwargs={
+        hidden_url = eventreverse_absolute(self.event, 'presale:event.payment.unlock', kwargs={
             'hash': hashlib.sha256((self.settings._hidden_seed + self.event.slug).encode()).hexdigest(),
         })
 
@@ -834,7 +834,7 @@ class BasePaymentProvider:
         """
         raise NotImplementedError()  # NOQA
 
-    def execute_payment(self, request: HttpRequest, payment: OrderPayment) -> str:
+    def execute_payment(self, request: HttpRequest, payment: OrderPayment) -> str | None:
         """
         After the user has confirmed their purchase, this method will be called to complete
         the payment process. This is the place to actually move the money if applicable.
@@ -936,7 +936,7 @@ class BasePaymentProvider:
         """
         Will be called if the *event administrator* views the details of a payment.
 
-        It should return HTML code containing information regarding the current payment
+        It should return a SafeString containing HTML code, with information regarding the current payment
         status and, if applicable, next steps.
 
         The default implementation returns an empty string.
@@ -961,7 +961,7 @@ class BasePaymentProvider:
         """
         Will be called if the *event administrator* views the details of a refund.
 
-        It should return HTML code containing information regarding the current refund
+        It should return a SafeString containing HTML code, with information regarding the current refund
         status and, if applicable, next steps.
 
         The default implementation returns an empty string.
@@ -1706,6 +1706,58 @@ class GiftCardPayment(BasePaymentProvider):
         )
 
 
+class BaseHistoricalPaymentProvider(BasePaymentProvider):
+    """
+    Base class for payment providers that no longer exist but can't be deleted to make sure historical
+    payments are shown correctly.
+
+    Subclasses are recommended to only implement:
+        - identifier
+        - verbose_name
+        - public_name
+    - payment_control_render
+    - payment_control_render_short
+    - refund_control_render
+    - refund_control_render_short
+    - render_invoice_text
+    - render_invoice_stamp
+    - api_payment_details
+    - api_refund_details
+    - shred_payment_info
+    - matching_id
+    - refund_matching_id
+    """
+
+    @property
+    def is_enabled(self) -> bool:
+        return False
+
+    @property
+    def settings_form_fields(self) -> dict:
+        return {}
+
+    def is_allowed(self, request: HttpRequest, total: Decimal=None) -> bool:
+        return False
+
+    def payment_is_valid_session(self, request: HttpRequest, payment: OrderPayment):
+        return False
+
+    def order_change_allowed(self, order: Order, request: HttpRequest=None) -> bool:
+        return False
+
+    def payment_refund_supported(self, payment: OrderPayment) -> bool:
+        return False
+
+    def payment_partial_refund_supported(self, payment: OrderPayment) -> bool:
+        return False
+
+    def execute_payment(self, request: HttpRequest, payment: OrderPayment):
+        raise PaymentException(_("This payment provider exists for historical purposes only and is no longer usable."))
+
+    def execute_refund(self, refund: OrderRefund):
+        raise PaymentException(_("This payment provider exists for historical purposes only and is no longer usable."))
+
+
 @receiver(register_payment_providers, dispatch_uid="payment_free")
 def register_payment_provider(sender, **kwargs):
     return [FreeOrderProvider, BoxOfficeProvider, OffsettingProvider, ManualPayment, GiftCardPayment]

src/pretix/base/pdf.py

@@ -77,6 +77,7 @@ from reportlab.platypus import Paragraph
 
 from pretix.base.i18n import language
 from pretix.base.models import Checkin, Event, Order, OrderPosition, Question
+from pretix.base.services.placeholders import PlaceholderContext
 from pretix.base.settings import PERSON_NAME_SCHEMES
 from pretix.base.signals import layout_image_variables, layout_text_variables
 from pretix.base.templatetags.money import money_filter
@@ -372,6 +373,11 @@ DEFAULT_VARIABLES = OrderedDict((
         "editor_sample": _("Atlantis"),
         "evaluate": lambda op, order, ev: str(getattr(order.invoice_address.country, 'name', '')) if getattr(order, 'invoice_address', None) else ''
     }),
+    ("invoice_custom_field", {
+        "label": _("Invoice custom recipient field"),
+        "editor_sample": _("Custom recipient field"),
+        "evaluate": lambda op, order, ev: order.invoice_address.custom_field if getattr(order, 'invoice_address', None) else ''
+    }),
     ("addons", {
         "label": _("List of Add-Ons"),
         "editor_sample": _("Add-on 1\n2x Add-on 2"),
@@ -396,11 +402,7 @@ DEFAULT_VARIABLES = OrderedDict((
         "editor_sample": _("Event organizer info text"),
         "evaluate": lambda op, order, ev: str(order.event.settings.organizer_info_text)
     }),
-    ("event_info_text", {
-        "label": _("Event info text"),
-        "editor_sample": _("Event info text"),
-        "evaluate": lambda op, order, ev: str(order.event.settings.event_info_text)
-    }),
+    ("event_info_text", {}),  # Placeholder to "reserve" position, defined later in `get_variables`
     ("now_date", {
         "label": _("Printing date"),
         "editor_sample": _("2017-05-31"),
@@ -498,9 +500,9 @@ DEFAULT_VARIABLES = OrderedDict((
         ) if op.valid_until else ""
     }),
     ("program_times", {
-        "label": _("Program times: date and time"),
+        "label": _("Program times"),
         "editor_sample": _(
-            "2017-05-31 10:00 – 12:00\n2017-05-31 14:00 – 16:00\n2017-05-31 14:00 – 2017-06-01 14:00"),
+            "2017-05-31 10:00 – 12:00, Room 1\n2017-05-31 14:00 – 16:00, Room 2\n2017-05-31 14:00 – 2017-06-01 14:00, Building A"),
         "evaluate": lambda op, order, ev: get_program_times(op, ev)
     }),
     ("medium_identifier", {
@@ -665,6 +667,14 @@ def get_images(event):
 def get_variables(event):
     v = copy.copy(DEFAULT_VARIABLES)
 
+    templating_context = PlaceholderContext(event=event)
+    v['event_info_text'] = {
+        "label": _("Event info text"),
+        "editor_sample": _("Event info text"),
+        "evaluate": lambda op, order, ev:
+            templating_context.format(str(order.event.settings.event_info_text))
+    }
+
     scheme = PERSON_NAME_SCHEMES[event.settings.name_scheme]
 
     concatenation_for_salutation = scheme.get("concatenation_for_salutation", scheme["concatenation"])
@@ -748,13 +758,19 @@ def get_seat(op: OrderPosition):
 
 
 def get_program_times(op: OrderPosition, ev: Event):
-    return '\n'.join([
-        datetimerange(
-            pt.start.astimezone(ev.timezone),
-            pt.end.astimezone(ev.timezone),
-            as_html=False
-        ) for pt in op.item.program_times.all()
-    ])
+    ptstr = []
+    for pt in op.item.program_times.all():
+        ptstr.append([
+            datetimerange(
+                pt.start.astimezone(ev.timezone),
+                pt.end.astimezone(ev.timezone),
+                as_html=False
+            ),
+            (', ' + ', '.join(
+                l.strip() for l in str(pt.location).splitlines() if l.strip())
+             ) if str(pt.location).strip() else ''
+        ])
+    return '\n'.join(''.join(l) for l in ptstr)
 
 
 def generate_compressed_addon_list(op, order, event, only_checked_in=False):
@@ -1056,7 +1072,7 @@ class Renderer:
         except:
             logger.exception('Reshaping/Bidi fixes failed on string {}'.format(repr(text)))
 
-        p = Paragraph(text, style=style)
+        p = Paragraph(text, style=style)  # not using AutoEscapeParagraph is safe as we escape above
         return p, ad, lineheight
 
     def _draw_textcontainer(self, canvas: Canvas, op: OrderPosition, order: Order, o: dict):

src/pretix/base/plugins.py

@@ -49,14 +49,39 @@ class PluginType(Enum):
     EXPORT = 4
 
 
+def plugin_is_available(meta, event=None, organizer=None):
+    if not hasattr(meta.app, 'is_available'):
+        return True
+
+    level = getattr(meta, "level", PLUGIN_LEVEL_EVENT)
+    if level == PLUGIN_LEVEL_EVENT:
+        if event:
+            return meta.app.is_available(event)
+        elif organizer:
+            if not hasattr(organizer, '_plugin_availability_fallback_event'):
+                with scope(organizer=organizer):
+                    setattr(organizer, '_plugin_availability_fallback_event', organizer.events.first())
+            return (
+                organizer._plugin_availability_fallback_event
+                and meta.app.is_available(organizer._plugin_availability_fallback_event)
+            )
+    elif level == PLUGIN_LEVEL_ORGANIZER:
+        if organizer:
+            return meta.app.is_available(organizer)
+        elif event:
+            return meta.app.is_available(event.organizer)
+    elif level == PLUGIN_LEVEL_EVENT_ORGANIZER_HYBRID and (event or organizer):
+        return meta.app.is_available(event or organizer)
+
+    return True
+
+
 def get_all_plugins(*, event=None, organizer=None) -> List[type]:
     """
     Returns the PretixPluginMeta classes of all plugins found in the installed Django apps.
     """
     assert not event or not organizer
     plugins = []
-    event_fallback = None
-    event_fallback_used = False
     for app in apps.get_app_configs():
         if hasattr(app, 'PretixPluginMeta'):
             meta = app.PretixPluginMeta
@@ -65,28 +90,8 @@ def get_all_plugins(*, event=None, organizer=None) -> List[type]:
             if app.name in settings.PRETIX_PLUGINS_EXCLUDE:
                 continue
 
-            level = getattr(meta, "level", PLUGIN_LEVEL_EVENT)
-            if level == PLUGIN_LEVEL_EVENT:
-                if event and hasattr(app, 'is_available'):
-                    if not app.is_available(event):
-                        continue
-                elif organizer and hasattr(app, 'is_available'):
-                    if not event_fallback_used:
-                        with scope(organizer=organizer):
-                            event_fallback = organizer.events.first()
-                        event_fallback_used = True
-                    if not event_fallback or not app.is_available(event_fallback):
-                        continue
-            elif level == PLUGIN_LEVEL_ORGANIZER:
-                if organizer and hasattr(app, 'is_available'):
-                    if not app.is_available(organizer):
-                        continue
-                elif event and hasattr(app, 'is_available'):
-                    if not app.is_available(event.organizer):
-                        continue
-            elif level == PLUGIN_LEVEL_EVENT_ORGANIZER_HYBRID and (event or organizer) and hasattr(app, 'is_available'):
-                if not app.is_available(event or organizer):
-                    continue
+            if not plugin_is_available(meta, event, organizer):
+                continue
 
             plugins.append(meta)
     return sorted(

src/pretix/base/secrets.py

@@ -245,6 +245,9 @@ def recv_classic(sender, **kwargs):
 
 
 def assign_ticket_secret(event, position, force_invalidate_if_revokation_list_used=False, force_invalidate=False, save=True):
+    if position.pk and position.issued_gift_cards.exists():
+        return
+
     gen = event.ticket_secret_generator
     if gen.use_revocation_list and force_invalidate_if_revokation_list_used:
         force_invalidate = True

src/pretix/base/services/cancelevent.py

@@ -22,6 +22,7 @@
 import logging
 from decimal import Decimal
 
+from django.conf import settings
 from django.db import transaction
 from django.db.models import Count, Exists, IntegerField, OuterRef, Q, Subquery
 from django.utils.crypto import get_random_string
@@ -377,12 +378,13 @@ def cancel_event(self, event: Event, subevent: int, auto_refund: bool,
         confirmation_code = get_random_string(8, allowed_chars="01234567890")
         mail(
             user.email,
-            subject=gettext('Bulk-refund confirmation'),
+            subject=gettext('Confirm event cancellation and bulk refund'),
             template='pretixbase/email/cancel_confirm.txt',
             context={
                 "event": str(event),
                 "amount": money_filter(refund_total, event.currency),
                 "confirmation_code": confirmation_code,
+                "instance": settings.PRETIX_INSTANCE_NAME,
             },
             locale=user.locale,
         )

src/pretix/base/services/cart.py

@@ -162,12 +162,12 @@ error_messages = {
     'price_too_high': gettext_lazy('The entered price is to high.'),
     'voucher_invalid': gettext_lazy('This voucher code is not known in our database.'),
     'voucher_min_usages': ngettext_lazy(
-        'The voucher code "%(voucher)s" can only be used if you select at least %(number)s matching products.',
+        'The voucher code "%(voucher)s" can only be used if you select at least %(number)s matching product.',
         'The voucher code "%(voucher)s" can only be used if you select at least %(number)s matching products.',
         'number'
     ),
     'voucher_min_usages_removed': ngettext_lazy(
-        'The voucher code "%(voucher)s" can only be used if you select at least %(number)s matching products. '
+        'The voucher code "%(voucher)s" can only be used if you select at least %(number)s matching product. '
         'We have therefore removed some positions from your cart that can no longer be purchased like this.',
         'The voucher code "%(voucher)s" can only be used if you select at least %(number)s matching products. '
         'We have therefore removed some positions from your cart that can no longer be purchased like this.',
@@ -287,11 +287,11 @@ def _check_position_constraints(
         raise CartPositionError(error_messages['unavailable'])
 
     # Invalid media policy for online sale
-    if item.media_policy in (Item.MEDIA_POLICY_NEW, Item.MEDIA_POLICY_REUSE_OR_NEW):
+    if item.media_policy in (Item.MEDIA_POLICY_NEW, Item.MEDIA_POLICY_REUSE_OR_NEW, Item.MEDIA_POLICY_APPEND_OR_NEW, Item.MEDIA_POLICY_REUSE_OR_NEW):
         mt = MEDIA_TYPES[item.media_type]
         if not mt.medium_created_by_server:
             raise CartPositionError(error_messages['media_usage_not_implemented'])
-    elif item.media_policy == Item.MEDIA_POLICY_REUSE:
+    elif item.media_policy in (Item.MEDIA_POLICY_REUSE, Item.MEDIA_POLICY_APPEND):
         raise CartPositionError(error_messages['media_usage_not_implemented'])
 
     # Item removed from sales channel

src/pretix/base/services/checkin.py

@@ -867,6 +867,15 @@ class RequiredQuestionsError(Exception):
         super().__init__(msg)
 
 
+class RequiredMediaExchangeError(Exception):
+    def __init__(self, msg, code, media_policy, media_type):
+        self.msg = msg
+        self.code = code
+        self.media_policy = media_policy
+        self.media_type = media_type
+        super().__init__(msg)
+
+
 def _save_answers(op, answers, given_answers):
     def _create_answer(question, answer):
         try:
@@ -939,7 +948,7 @@ def perform_checkin(op: OrderPosition, clist: CheckinList, given_answers: dict,
                     ignore_unpaid=False, nonce=None, datetime=None, questions_supported=True,
                     user=None, auth=None, canceled_supported=False, type=Checkin.TYPE_ENTRY,
                     raw_barcode=None, raw_source_type=None, from_revoked_secret=False, simulate=False,
-                    gate=None):
+                    gate=None, reusable_medium=None):
     """
     Create a checkin for this particular order position and check-in list. Fails with CheckInError if the check in is
     not valid at this time.
@@ -955,6 +964,7 @@ def perform_checkin(op: OrderPosition, clist: CheckinList, given_answers: dict,
     :param datetime: The datetime of the checkin, defaults to now.
     :param simulate: If true, the check-in is not saved.
     :param gate: The gate the check-in was performed at.
+    :param reusable_medium: The medium that is available for an exchange
     """
 
     # !!!!!!!!!
@@ -1035,7 +1045,7 @@ def perform_checkin(op: OrderPosition, clist: CheckinList, given_answers: dict,
 
     with transaction.atomic():
         # Lock order positions, if it is an entry. We don't need it for exits, as a race condition wouldn't be problematic
-        opqs = OrderPosition.all
+        opqs = OrderPosition.all.select_related("order", "item")
         if type != Checkin.TYPE_EXIT:
             opqs = opqs.select_for_update(of=OF_SELF)
         op = opqs.get(pk=op.pk)
@@ -1101,6 +1111,24 @@ def perform_checkin(op: OrderPosition, clist: CheckinList, given_answers: dict,
                 require_answers
             )
 
+        required_media_policy = op.item.media_policy
+        required_media_type = op.item.media_type
+        require_a_medium = required_media_policy and required_media_type
+        linked_media = op.linked_media
+        if require_a_medium and not reusable_medium and not force:
+            if not linked_media.exists():
+                raise RequiredMediaExchangeError(
+                    _('Ticket needs to be exchanged to a suitable medium.'),
+                    'exchange',
+                    required_media_policy,
+                    required_media_type
+                )
+            elif op.organizer.settings.reusable_media_usage_enforced:
+                raise CheckInError(
+                    _('This ticket has already been exchanged for a reusable medium that now needs to be used instead.'),
+                    'already_exchanged',
+                )
+
         device = None
         if isinstance(auth, Device):
             device = auth

src/pretix/base/services/cross_selling.py

@@ -29,7 +29,7 @@ from typing import List
 from django.utils.functional import cached_property
 
 from pretix.base.models import CartPosition, ItemCategory, SalesChannel
-from pretix.presale.views.event import get_grouped_items
+from pretix.presale.productlist import prepare_item_list_for_shop
 
 
 class DummyCategory:
@@ -162,7 +162,7 @@ class CrossSellingService:
         ]
 
     def _prepare_items(self, subevent, items_qs, discount_info):
-        items, _btn = get_grouped_items(
+        items, _btn = prepare_item_list_for_shop(
             self.event,
             subevent=subevent,
             voucher=None,

src/pretix/base/services/export.py

@@ -51,7 +51,7 @@ from pretix.base.signals import (
 )
 from pretix.celery_app import app
 from pretix.helpers import OF_SELF, repeatable_reads_transaction
-from pretix.helpers.urls import build_absolute_uri
+from pretix.helpers.urls import mainreverse_absolute
 
 logger = logging.getLogger(__name__)
 
@@ -340,12 +340,13 @@ def _run_scheduled_export(schedule, context: Union[Event, Organizer], exporter,
             if schedule.owner.is_active:
                 mail(
                     email=schedule.owner.email,
-                    subject=gettext('Export failed'),
+                    subject=gettext('Scheduled export failed'),
                     template='pretixbase/email/export_failed.txt',
                     context={
                         'configuration_url': config_url,
                         'reason': msg,
                         'soft': soft,
+                        'instance': settings.PRETIX_INSTANCE_NAME,
                     },
                     event=context if isinstance(context, Event) else None,
                     organizer=context.organizer if isinstance(context, Event) else context,
@@ -455,7 +456,7 @@ def scheduled_organizer_export(self, organizer: Organizer, schedule: int) -> Non
         schedule,
         organizer,
         exporter,
-        build_absolute_uri(
+        mainreverse_absolute(
             'control:organizer.export',
             kwargs={
                 'organizer': organizer.slug,
@@ -481,7 +482,7 @@ def scheduled_event_export(self, event: Event, schedule: int) -> None:
         schedule,
         event,
         exporter,
-        build_absolute_uri(
+        mainreverse_absolute(
             'control:event.orders.export',
             kwargs={
                 'event': event.slug,

src/pretix/base/services/mail.py

@@ -85,7 +85,7 @@ from pretix.helpers.format import (
     FormattedString, PlainHtmlAlternativeString, SafeFormatter, format_map,
 )
 from pretix.helpers.hierarkey import clean_filename
-from pretix.multidomain.urlreverse import build_absolute_uri
+from pretix.multidomain.urlreverse import eventreverse_absolute
 from pretix.presale.ical import get_private_icals
 
 logger = logging.getLogger('pretix.base.mail')
@@ -997,7 +997,7 @@ def _wrap_plain_body(content_plain, signature, event, order, position, no_order_
         body_plain += _(
             "You can view your order details at the following URL:\n{orderurl}."
         ).replace("\n", "\r\n").format(
-            orderurl=build_absolute_uri(
+            orderurl=eventreverse_absolute(
                 order.event, 'presale:event.order.position', kwargs={
                     'order': order.code,
                     'secret': position.web_secret,
@@ -1013,7 +1013,7 @@ def _wrap_plain_body(content_plain, signature, event, order, position, no_order_
         body_plain += _(
             "You can view your order details at the following URL:\n{orderurl}."
         ).replace("\n", "\r\n").format(
-            event=event.name, orderurl=build_absolute_uri(
+            event=event.name, orderurl=eventreverse_absolute(
                 order.event, 'presale:event.order.open', kwargs={
                     'order': order.code,
                     'secret': order.secret,

src/pretix/base/services/media.py

@@ -23,10 +23,13 @@ import secrets
 
 from django.db import IntegrityError
 from django.db.models import Q
+from django.utils.translation import gettext as _
 from django_scopes import scopes_disabled
 
-from pretix.base.models import GiftCardAcceptance
-from pretix.base.models.media import MediumKeySet
+from pretix.base.media import MEDIA_TYPES
+from pretix.base.models import Checkin, GiftCardAcceptance, Item
+from pretix.base.models.media import MediumKeySet, ReusableMedium
+from pretix.base.services.checkin import CheckInError
 
 
 def create_nfc_mf0aes_keyset(organizer):
@@ -70,3 +73,174 @@ def get_keysets_for_organizer(organizer):
         if new_set:
             sets.append(new_set)
     return sets
+
+
+def perform_media_exchange(organizer, media_type, identifier, link_orderposition, user, auth):
+    """
+    Create or retrieve a medium, then link the order position to it. Expected to be called in a transaction.
+
+    :param organizer: Organizer to operate in
+    :param media_type: Type of medium to operate with
+    :param identifier: Identifier of the medium
+    :param link_orderposition: Position to link to the medium
+    :return: ReusableMedium
+    """
+    medium = None
+    media_policy = link_orderposition.item.media_policy
+
+    if media_type not in MEDIA_TYPES:  # should be caught by serializer already
+        raise CheckInError(
+            _('Invalid medium type.'),
+            Checkin.REASON_ERROR,
+            reason=_('Invalid medium type.'),
+        )
+
+    if not MEDIA_TYPES[media_type].is_active(organizer):
+        raise CheckInError(
+            _('Medium type is not enabled for organizer.'),
+            Checkin.REASON_ERROR,
+            reason=_('Medium type is not enabled for organizer.'),
+        )
+
+    if link_orderposition.item.media_type != media_type:
+        raise CheckInError(
+            _('Incorrect medium type for product.'),
+            Checkin.REASON_PRODUCT,
+            reason=_('Incorrect medium type for product.'),
+        )
+
+    if link_orderposition.linked_media.exists():
+        raise CheckInError(
+            _('Ticket is already exchanged for reusable medium.'),
+            Checkin.REASON_ALREADY_EXCHANGED,
+            reason=_('Ticket is already exchanged for reusable medium.'),
+        )
+
+    if media_policy in (Item.MEDIA_POLICY_APPEND, Item.MEDIA_POLICY_APPEND_OR_NEW, Item.MEDIA_POLICY_NEW):
+        link_action = "append"
+    else:
+        link_action = "replace"
+
+    if media_policy in (Item.MEDIA_POLICY_REUSE, Item.MEDIA_POLICY_APPEND):
+        try:
+            medium = ReusableMedium.objects.get(
+                type=media_type,
+                identifier=identifier,
+                organizer=organizer,
+            )
+        except ReusableMedium.DoesNotExist:
+            raise CheckInError(
+                _('Reusable medium not found.'),
+                Checkin.REASON_MEDIUM_INVALID,
+                reason=_('Reusable medium not found.'),
+            )
+        else:
+            if medium.is_expired or not medium.active:
+                raise CheckInError(
+                    _('Reusable medium is inactive or expired.'),
+                    Checkin.REASON_MEDIUM_INVALID,
+                    reason=_('Reusable medium is inactive or expired.'),
+                )
+
+    elif media_policy in (Item.MEDIA_POLICY_REUSE_OR_NEW, Item.MEDIA_POLICY_APPEND_OR_NEW):
+        try:
+            medium = ReusableMedium.objects.get(
+                type=media_type,
+                identifier=identifier,
+                organizer=organizer,
+            )
+        except ReusableMedium.DoesNotExist:
+            if not MEDIA_TYPES[media_type].medium_created_from_unknown_supported:
+                raise CheckInError(
+                    _('Reusable medium not found and could not be created.'),
+                    Checkin.REASON_MEDIUM_INVALID,
+                )
+
+            medium = MEDIA_TYPES[media_type].handle_unknown(organizer, identifier, user, auth, force_create=True)
+            if not medium:
+                raise CheckInError(
+                    _('Reusable medium not found and could not be created.'),
+                    Checkin.REASON_MEDIUM_INVALID,
+                )
+
+        if medium.is_expired or not medium.active:
+            raise CheckInError(
+                _('Reusable medium is inactive or expired.'),
+                Checkin.REASON_MEDIUM_INVALID,
+                reason=_('Reusable medium is inactive or expired.'),
+            )
+
+    elif media_policy == Item.MEDIA_POLICY_NEW:
+        if not MEDIA_TYPES[media_type].medium_created_from_unknown_supported:
+            raise CheckInError(
+                _('Reusable medium not found and could not be created.'),
+                Checkin.REASON_MEDIUM_INVALID,
+            )
+        try:
+            medium = MEDIA_TYPES[media_type].handle_unknown(organizer, identifier, user, auth, force_create=True)
+        except IntegrityError:
+            raise CheckInError(
+                _('Reusable medium already exists.'),
+                Checkin.REASON_MEDIUM_EXISTS,
+            )
+        else:
+            if not medium:
+                raise CheckInError(
+                    _('Reusable medium could not be created.'),
+                    Checkin.REASON_MEDIUM_INVALID,
+                )
+
+    else:
+        raise CheckInError(
+            _('Product does not support medium exchange.'),
+            Checkin.REASON_PRODUCT,
+            reason=_('Product does not support medium exchange.'),
+        )
+
+    if link_action == 'append':
+        medium.linked_orderpositions.add(link_orderposition)
+        medium.log_action(
+            'pretix.reusable_medium.linked_orderposition.added',
+            user=user,
+            auth=auth,
+            data={
+                'linked_orderposition': link_orderposition,
+            }
+        )
+    elif link_action == 'replace':
+        already_found = False
+        for op_pk in medium.linked_orderpositions.values_list('pk', flat=True):
+            if op_pk == link_orderposition.pk:
+                already_found = True
+                continue
+            else:
+                medium.log_action(
+                    'pretix.reusable_medium.linked_orderposition.removed',
+                    data={
+                        'linked_orderposition': op_pk,
+                    }
+                )
+        if not already_found:
+            medium.linked_orderpositions.set([link_orderposition])
+            medium.log_action(
+                'pretix.reusable_medium.linked_orderposition.added',
+                user=user,
+                auth=auth,
+                data={
+                    'linked_orderposition': link_orderposition,
+                }
+            )
+
+    link_orderposition.order.log_action(
+        'pretix.reusable_medium.exchanged',
+        data={
+            'position': link_orderposition.pk,
+            'positionid': link_orderposition.positionid,
+            'medium': medium.pk,
+            'medium_identifier': medium.identifier,
+            'medium_type': medium.media_type.identifier,
+        }
+    )
+    medium.touch()
+
+    return medium