Run pytest with -v

* Create django.yml

* Fix working directory

* ..

* .

* ..

* a.

* ..

* .

* Fix typo

* Install hunspell

* maxfail

* Fix install

* .

* Reduce number of typos

* Even less typos

* Postgres debug

* Spelling fixes, yet again

* Postgres with PW

* Fix failing test

* New workflows

* Fix syntax error

* Install gettext

* Test aginst python 3.6 as well

* Clean up strategies

* Add badge, do not ignore migrations

* Use pip cache

.github/workflows/docs.yml

@@ -0,0 +1,42 @@
+name: Documentation
+
+on:
+  push:
+    branches: [ master ]
+    paths-ignore:
+      - 'src/pretix/locale/**'
+      - 'src/pretix/static/**'
+      - 'src/tests/**'
+  pull_request:
+    branches: [ master ]
+    paths-ignore:
+      - 'src/pretix/locale/**'
+      - 'src/pretix/static/**'
+      - 'src/tests/**'
+
+jobs:
+  spelling:
+    name: Spellcheck
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - name: Set up Python 3.8
+        uses: actions/setup-python@v1
+        with:
+          python-version: 3.8
+      - uses: actions/cache@v1
+        with:
+          path: ~/.cache/pip
+          key: ${{ runner.os }}-pip-${{ hashFiles('**/requirements.txt') }}
+          restore-keys: |
+            ${{ runner.os }}-pip-
+      - name: Install system packages
+        run: sudo apt install enchant hunspell aspell-en
+      - name: Install Dependencies
+        run: pip3 install --no-use-pep517 -Ur doc/requirements.txt
+      - name: Spellcheck docs
+        run: make spelling
+        working-directory: ./doc
+      - name:
+        run: '[ ! -s _build/spelling/output.txt ]'
+        working-directory: ./doc

.github/workflows/strings.yml

@@ -0,0 +1,60 @@
+name: Strings
+
+on:
+  push:
+    branches: [ master ]
+    paths:
+      - 'src/pretix/locale/**'
+  pull_request:
+    branches: [ master ]
+    paths:
+      - 'src/pretix/locale/**'
+
+jobs:
+  compile:
+    runs-on: ubuntu-latest
+    name: Check gettext syntax
+    steps:
+      - uses: actions/checkout@v2
+      - name: Set up Python 3.8
+        uses: actions/setup-python@v1
+        with:
+          python-version: 3.8
+      - uses: actions/cache@v1
+        with:
+          path: ~/.cache/pip
+          key: ${{ runner.os }}-pip-${{ hashFiles('**/requirements.txt') }}
+          restore-keys: |
+            ${{ runner.os }}-pip-
+      - name: Install system packages
+        run: sudo apt install gettext
+      - name: Install Dependencies
+        run: pip3 install --no-use-pep517 -Ur src/requirements.txt
+      - name: Compile messages
+        run: python manage.py compilemessages
+        working-directory: ./src
+      - name: Compile jsi18n
+        run: python manage.py compilejsi18n
+        working-directory: ./src
+  spelling:
+    runs-on: ubuntu-latest
+    name: Spellcheck
+    steps:
+      - uses: actions/checkout@v2
+      - name: Set up Python 3.8
+        uses: actions/setup-python@v1
+        with:
+          python-version: 3.8
+      - uses: actions/cache@v1
+        with:
+          path: ~/.cache/pip
+          key: ${{ runner.os }}-pip-${{ hashFiles('**/requirements.txt') }}
+          restore-keys: |
+            ${{ runner.os }}-pip-
+      - name: Install system packages
+        run: sudo apt install enchant hunspell hunspell-de-de aspell-en aspell-de
+      - name: Install Dependencies
+        run: pip3 install --no-use-pep517 -Ur src/requirements/dev.txt
+      - name: Spellcheck translations
+        run: potypo
+        working-directory: ./src

.github/workflows/style.yml

@@ -0,0 +1,55 @@
+name: Code Style
+
+on:
+  push:
+    branches: [ master ]
+    paths-ignore:
+      - 'src/pretix/locale/**'
+      - 'src/pretix/static/**'
+  pull_request:
+    branches: [ master ]
+    paths-ignore:
+      - 'src/pretix/locale/**'
+      - 'src/pretix/static/**'
+
+jobs:
+  isort:
+    name: isort
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - name: Set up Python 3.8
+        uses: actions/setup-python@v1
+        with:
+          python-version: 3.8
+      - uses: actions/cache@v1
+        with:
+          path: ~/.cache/pip
+          key: ${{ runner.os }}-pip-${{ hashFiles('**/requirements.txt') }}
+          restore-keys: |
+            ${{ runner.os }}-pip-
+      - name: Install Dependencies
+        run: pip3 install --no-use-pep517 -Ur src/requirements/dev.txt
+      - name: Run isort
+        run: isort -c -rc -df .
+        working-directory: ./src
+  flake:
+    name: flake8
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - name: Set up Python 3.8
+        uses: actions/setup-python@v1
+        with:
+          python-version: 3.8
+      - uses: actions/cache@v1
+        with:
+          path: ~/.cache/pip
+          key: ${{ runner.os }}-pip-${{ hashFiles('**/requirements.txt') }}
+          restore-keys: |
+            ${{ runner.os }}-pip-
+      - name: Install Dependencies
+        run: pip3 install -r src/requirements.txt --no-use-pep517 -Ur src/requirements/dev.txt
+      - name: Run flake8
+        run: flake8 .
+        working-directory: ./src

.github/workflows/tests.yml

@@ -0,0 +1,73 @@
+name: Tests
+
+on:
+  push:
+    branches: [ master ]
+    paths-ignore:
+      - 'doc/**'
+  pull_request:
+    branches: [ master ]
+    paths-ignore:
+      - 'doc/**'
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    name: Tests
+    strategy:
+      matrix:
+        python-version: [3.6, 3.7, 3.8]
+        database: [sqlite, postgres, mysql]
+        exclude:
+          - database: mysql
+            python-version: 3.7
+          - database: sqlite
+            python-version: 3.7
+          - database: mysql
+            python-version: 3.6
+          - database: sqlite
+            python-version: 3.6
+    steps:
+      - uses: actions/checkout@v2
+      - uses: getong/mariadb-action@v1.1
+        with:
+          mariadb version: '10.4'
+          mysql database: 'pretix'
+          mysql root password: ''
+        if: matrix.database == 'mysql'
+      - uses: harmon758/postgresql-action@v1
+        with:
+          postgresql version: '11'
+          postgresql db: 'pretix'
+          postgresql user: 'postgres'
+          postgresql password: 'postgres'
+        if: matrix.database == 'postgres'
+      - name: Set up Python ${{ matrix.python-version }}
+        uses: actions/setup-python@v1
+        with:
+          python-version: ${{ matrix.python-version }}
+      - uses: actions/cache@v1
+        with:
+          path: ~/.cache/pip
+          key: ${{ runner.os }}-pip-${{ hashFiles('**/requirements.txt') }}
+          restore-keys: |
+            ${{ runner.os }}-pip-
+      - name: Install system dependencies
+        run: sudo apt install gettext mysql-client
+      - name: Install Python dependencies
+        run: pip3 install -r src/requirements.txt --no-use-pep517 -Ur src/requirements/dev.txt mysqlclient psycopg2-binary
+      - name: Run checks
+        run: python manage.py check
+        working-directory: ./src
+      - name: Compile
+        working-directory: ./src
+        run: make all compress
+      - name: Run tests
+        working-directory: ./src
+        run: PRETIX_CONFIG_FILE=tests/travis_${{ matrix.database }}.cfg py.test -v -n 3 -p no:sugar --cov=./ --cov-report=xml --reruns 3 tests --maxfail=100
+      - name: Upload coverage
+        uses: codecov/codecov-action@v1
+        with:
+          file: src/coverage.xml
+          fail_ci_if_error: true
+        if: matrix.database == 'postgres' && matrix.python-version == '3.8'

.gitlab-ci.yml

@@ -5,7 +5,11 @@ tests:
         - virtualenv env
         - source env/bin/activate
         - pip install -U pip wheel setuptools
-        - XDG_CACHE_HOME=/cache bash .travis.sh tests
+        - XDG_CACHE_HOME=/cache pip3 install -r src/requirements.txt --no-use-pep517 -Ur src/requirements/dev.txt
+        - cd src
+        - python manage.py check
+        - make all compress
+        - py.test --reruns 3 -n 3 tests
     tags:
         - python3
     except:

.travis.sh

@@ -1,68 +0,0 @@
-#!/bin/bash
-set -e
-set -x
-
-echo "Executing job $1"
-
-if [ "$PRETIX_CONFIG_FILE" == "tests/travis_mysql.cfg" ]; then
-    mysql -u root -e 'CREATE DATABASE pretix DEFAULT CHARACTER SET utf8 DEFAULT COLLATE utf8_general_ci;'
-    pip3 install -Ur src/requirements/mysql.txt
-fi
-
-if [ "$PRETIX_CONFIG_FILE" == "tests/travis_postgres.cfg" ]; then
-    psql -c 'create database travis_ci_test;' -U postgres
-fi
-
-if [ "$1" == "style" ]; then
-	XDG_CACHE_HOME=/cache pip3 install --no-use-pep517 -Ur src/requirements.txt -r src/requirements/dev.txt
-	cd src
-    flake8 .
-    isort -c -rc -df .
-fi
-if [ "$1" == "doctests" ]; then
-	XDG_CACHE_HOME=/cache pip3 install --no-use-pep517 -Ur doc/requirements.txt
-	cd doc
-	make doctest
-fi
-if [ "$1" == "doc-spelling" ]; then
-	XDG_CACHE_HOME=/cache pip3 install --no-use-pep517 -Ur doc/requirements.txt
-	cd doc
-	make spelling
-	if [ -s _build/spelling/output.txt ]; then
-		exit 1
-	fi
-fi
-if [ "$1" == "translation-spelling" ]; then
-	XDG_CACHE_HOME=/cache pip3 install --no-use-pep517 -Ur src/requirements/dev.txt
-	cd src
-	potypo
-fi
-if [ "$1" == "tests" ]; then
-	pip3 install -r src/requirements.txt --no-use-pep517 -Ur src/requirements/dev.txt
-	cd src
-	python manage.py check
-	make all compress
-	py.test --reruns 5 -n 3 tests
-fi
-if [ "$1" == "tests-cov" ]; then
-	pip3 install -r src/requirements.txt --no-use-pep517 -Ur src/requirements/dev.txt
-	cd src
-	python manage.py check
-	make all compress
-	coverage run -m py.test --reruns 5 tests && codecov
-fi
-if [ "$1" == "plugins" ]; then
-	pip3 install -r src/requirements.txt --no-use-pep517 -Ur src/requirements/dev.txt
-	cd src
-	python setup.py develop
-	make all compress
-
-	pushd ~
-    git clone --depth 1 https://github.com/pretix/pretix-cartshare.git
-    cd pretix-cartshare
-    python setup.py develop
-    make
-	py.test --reruns 5 tests
-    popd
-
-fi

.travis.yml

@@ -1,45 +0,0 @@
-language: python
-dist: xenial
-sudo: false
-install:
-  - pip install -U pip wheel setuptools
-script:
-  - bash .travis.sh $JOB
-cache:
-  directories:
-    - $HOME/.cache/pip
-services:
-  - mysql
-  - postgresql
-matrix:
-  include:
-    - python: 3.7
-      env: JOB=tests PRETIX_CONFIG_FILE=tests/travis_sqlite.cfg
-    - python: 3.7
-      env: JOB=tests-cov PRETIX_CONFIG_FILE=tests/travis_postgres.cfg
-    - python: 3.7
-      env: JOB=style
-    - python: 3.7
-      env: JOB=tests PRETIX_CONFIG_FILE=tests/travis_mysql.cfg
-    - python: 3.7
-      env: JOB=tests PRETIX_CONFIG_FILE=tests/travis_postgres.cfg
-    - python: 3.5
-      env: JOB=tests PRETIX_CONFIG_FILE=tests/travis_postgres.cfg
-    - python: 3.7
-      env: JOB=doc-spelling
-    - python: 3.7
-      env: JOB=translation-spelling
-addons:
-  postgresql: "9.4"
-  mariadb: '10.3'
-  apt:
-      packages:
-          - enchant
-          - myspell-de-de
-          - aspell-en
-          - sqlite3
-  sources:
-    - travis-ci/sqlite3
-branches:
-  except:
-  - /^weblate-.*/

README.rst

@@ -4,11 +4,10 @@ pretix
 .. image:: https://img.shields.io/pypi/v/pretix.svg
    :target: https://pypi.python.org/pypi/pretix
 
-.. image:: https://readthedocs.org/projects/pretix/badge/?version=latest
+.. image:: https://github.com/pretix/pretix/workflows/Documentation/badge.svg
    :target: https://docs.pretix.eu/en/latest/
 
-.. image:: https://travis-ci.org/pretix/pretix.svg?branch=master
-   :target: https://travis-ci.org/pretix/pretix
+.. image:: https://github.com/pretix/pretix/workflows/Tests/badge.svg
 
 .. image:: https://codecov.io/gh/pretix/pretix/branch/master/graph/badge.svg
    :target: https://codecov.io/gh/pretix/pretix

doc/admin/installation/docker_smallscale.rst

@@ -182,7 +182,7 @@ named ``/etc/systemd/system/pretix.service`` with the following content::
         -v /var/pretix-data:/data \
         -v /etc/pretix:/etc/pretix \
         -v /var/run/redis:/var/run/redis \
-        --sysctl net.core.somaxconn=4096
+        --sysctl net.core.somaxconn=4096 \
         pretix/standalone:stable all
     ExecStop=/usr/bin/docker stop %n
 

doc/admin/installation/manual_smallscale.rst

@@ -12,7 +12,7 @@ solution with many things readily set-up, look at :ref:`dockersmallscale`.
              get it right. If you're not feeling comfortable managing a Linux server, check out our hosting and service
              offers at `pretix.eu`_.
 
-We tested this guide on the Linux distribution **Debian 8.0** but it should work very similar on other
+We tested this guide on the Linux distribution **Debian 10.0** but it should work very similar on other
 modern distributions, especially on all systemd-based ones.
 
 Requirements
@@ -133,7 +133,7 @@ command if you're running MySQL::
 
     (venv)$ pip3 install "pretix[postgres]" gunicorn
 
-Note that you need Python 3.5 or newer. You can find out your Python version using ``python -V``.
+Note that you need Python 3.6 or newer. You can find out your Python version using ``python -V``.
 
 We also need to create a data directory::
 

doc/api/resources/events.rst

@@ -43,6 +43,7 @@ seating_plan                          integer                    If reserved sea
 seat_category_mapping                 object                     An object mapping categories of the seating plan
                                                                  (strings) to items in the event (integers or ``null``).
 timezone                              string                     Event timezone name
+item_meta_properties                  object                     Item-specific meta data parameters and default values.
 ===================================== ========================== =======================================================
 
 
@@ -79,6 +80,10 @@ timezone                              string                     Event timezone
 
    The attribute ``timezone`` has been added.
 
+.. versionchanged:: 3.7
+
+   The attribute ``item_meta_properties`` has been added.
+
 Endpoints
 ---------
 
@@ -133,6 +138,7 @@ Endpoints
             "seating_plan": null,
             "seat_category_mapping": {},
             "timezone": "Europe/Berlin",
+            "item_meta_properties": {},
             "plugins": [
               "pretix.plugins.banktransfer"
               "pretix.plugins.stripe"
@@ -204,6 +210,7 @@ Endpoints
         "seat_category_mapping": {},
         "meta_data": {},
         "timezone": "Europe/Berlin",
+        "item_meta_properties": {},
         "plugins": [
           "pretix.plugins.banktransfer"
           "pretix.plugins.stripe"
@@ -256,6 +263,7 @@ Endpoints
         "has_subevents": false,
         "meta_data": {},
         "timezone": "Europe/Berlin",
+        "item_meta_properties": {},
         "plugins": [
           "pretix.plugins.stripe",
           "pretix.plugins.paypal"
@@ -290,6 +298,7 @@ Endpoints
         "has_subevents": false,
         "meta_data": {},
         "timezone": "Europe/Berlin",
+        "item_meta_properties": {},
         "plugins": [
           "pretix.plugins.stripe",
           "pretix.plugins.paypal"
@@ -344,6 +353,7 @@ Endpoints
         "has_subevents": false,
         "meta_data": {},
         "timezone": "Europe/Berlin",
+        "item_meta_properties": {},
         "plugins": [
           "pretix.plugins.stripe",
           "pretix.plugins.paypal"
@@ -378,6 +388,7 @@ Endpoints
         "seat_category_mapping": {},
         "meta_data": {},
         "timezone": "Europe/Berlin",
+        "item_meta_properties": {},
         "plugins": [
           "pretix.plugins.stripe",
           "pretix.plugins.paypal"
@@ -444,6 +455,7 @@ Endpoints
         "seat_category_mapping": {},
         "meta_data": {},
         "timezone": "Europe/Berlin",
+        "item_meta_properties": {},
         "plugins": [
           "pretix.plugins.banktransfer",
           "pretix.plugins.stripe",

doc/api/resources/giftcards.rst

@@ -18,6 +18,8 @@ secret                                string                     Gift card code
 value                                 money (string)             Current gift card value
 currency                              string                     Currency of the value (can not be modified later)
 testmode                              boolean                    Whether this is a test gift card
+expires                               datetime                   Expiry date (or ``null``)
+conditions                            string                     Special terms and conditions for this card (or ``null``)
 ===================================== ========================== =======================================================
 
 Endpoints
@@ -53,12 +55,17 @@ Endpoints
             "secret": "HLBYVELFRC77NCQY",
             "currency": "EUR",
             "testmode": false,
+            "expires": null,
+            "conditions": null,
             "value": "13.37"
           }
         ]
       }
 
    :query integer page: The page number in case of a multi-page result set, default is 1
+   :query string secret: Only show gift cards with the given secret.
+   :query boolean testmode: Filter for gift cards that are (not) in test mode.
+   :query boolean include_accepted: Also show gift cards issued by other organizers that are accepted by this organizer.
    :param organizer: The ``slug`` field of the organizer to fetch
    :statuscode 200: no error
    :statuscode 401: Authentication failure
@@ -89,11 +96,14 @@ Endpoints
         "secret": "HLBYVELFRC77NCQY",
         "currency": "EUR",
         "testmode": false,
+        "expires": null,
+        "conditions": null,
         "value": "13.37"
       }
 
    :param organizer: The ``slug`` field of the organizer to fetch
    :param id: The ``id`` field of the gift card to fetch
+   :query boolean include_accepted: Also show gift cards issued by other organizers that are accepted by this organizer.
    :statuscode 200: no error
    :statuscode 401: Authentication failure
    :statuscode 403: The requested organizer does not exist **or** you have no permission to view this resource.
@@ -130,6 +140,8 @@ Endpoints
         "secret": "HLBYVELFRC77NCQY",
         "testmode": false,
         "currency": "EUR",
+        "expires": null,
+        "conditions": null,
         "value": "13.37"
       }
 
@@ -176,6 +188,8 @@ Endpoints
         "secret": "HLBYVELFRC77NCQY",
         "testmode": false,
         "currency": "EUR",
+        "expires": null,
+        "conditions": null,
         "value": "14.00"
       }
 
@@ -218,6 +232,8 @@ Endpoints
         "secret": "HLBYVELFRC77NCQY",
         "currency": "EUR",
         "testmode": false,
+        "expires": null,
+        "conditions": null,
         "value": "15.37"
       }
 
@@ -227,6 +243,7 @@ Endpoints
 
    :param organizer: The ``slug`` field of the organizer to modify
    :param id: The ``id`` field of the gift card to modify
+   :query boolean include_accepted: Also show gift cards issued by other organizers that are accepted by this organizer.
    :statuscode 200: no error
    :statuscode 400: The gift card could not be modified due to invalid submitted data
    :statuscode 401: Authentication failure

doc/api/resources/items.rst

@@ -114,6 +114,7 @@ bundles                               list of objects            Definition of b
 └ designated_price                    money (string)             Designated price of the bundled product. This will be
                                                                  used to split the price of the base item e.g. for mixed
                                                                  taxation. This is not added to the price.
+meta_data                             object                     Values set for event-specific meta data parameters.
 ===================================== ========================== =======================================================
 
 .. versionchanged:: 2.7
@@ -154,6 +155,10 @@ bundles                               list of objects            Definition of b
 
    The ``show_quota_left``, ``allow_waitinglist``, and ``hidden_if_available`` attributes have been added.
 
+.. versionchanged:: 3.7
+
+   The attribute ``meta_data`` has been added.
+
 Notes
 -----
 
@@ -208,6 +213,7 @@ Endpoints
             "tax_rule": 1,
             "admission": false,
             "issue_giftcard": false,
+            "meta_data": {},
             "position": 0,
             "picture": null,
             "available_from": null,
@@ -303,6 +309,7 @@ Endpoints
         "tax_rule": 1,
         "admission": false,
         "issue_giftcard": false,
+        "meta_data": {},
         "position": 0,
         "picture": null,
         "available_from": null,
@@ -379,6 +386,7 @@ Endpoints
         "tax_rule": 1,
         "admission": false,
         "issue_giftcard": false,
+        "meta_data": {},
         "position": 0,
         "picture": null,
         "available_from": null,
@@ -442,6 +450,7 @@ Endpoints
         "tax_rule": 1,
         "admission": false,
         "issue_giftcard": false,
+        "meta_data": {},
         "position": 0,
         "picture": null,
         "available_from": null,
@@ -537,6 +546,7 @@ Endpoints
         "tax_rule": 1,
         "admission": false,
         "issue_giftcard": false,
+        "meta_data": {},
         "position": 0,
         "picture": null,
         "available_from": null,

doc/api/resources/orders.rst

@@ -151,6 +151,10 @@ last_modified                         datetime                   Last modificati
 
    The ``order.fees.canceled`` attribute has been added.
 
+.. versionchanged:: 3.8
+
+   The ``reactivate`` operation has been added.
+
 
 .. _order-position-resource:
 
@@ -173,6 +177,13 @@ price                                 money (string)             Price of this p
 attendee_name                         string                     Specified attendee name for this position (or ``null``)
 attendee_name_parts                   object of strings          Decomposition of attendee name (i.e. given name, family name)
 attendee_email                        string                     Specified attendee email address for this position (or ``null``)
+company                               string                     Attendee company name (or ``null``)
+street                                string                     Attendee street (or ``null``)
+zipcode                               string                     Attendee ZIP code (or ``null``)
+city                                  string                     Attendee city (or ``null``)
+country                               string                     Attendee country code (or ``null``)
+state                                 string                     Attendee state (ISO 3166-2 code). Only supported in
+                                                                 AU, BR, CA, CN, MY, MX, and US, otherwise ``null``.
 voucher                               integer                    Internal ID of the voucher used for this position (or ``null``)
 tax_rate                              decimal (string)           VAT rate applied for this position
 tax_value                             money (string)             VAT included in this position
@@ -236,6 +247,10 @@ pdf_data                              object                     Data object req
 
   The attribute ``canceled`` has been added.
 
+.. versionchanged:: 3.8
+
+  The attributes ``company``, ``street``, ``zipcode``, ``city``, ``country``, and ``state`` have been added.
+
 .. _order-payment-resource:
 
 Order payment resource
@@ -380,6 +395,12 @@ List of all orders
                   "full_name": "Peter",
                 },
                 "attendee_email": null,
+                "company": "Sample company",
+                "street": "Test street 12",
+                "zipcode": "12345",
+                "city": "Testington",
+                "country": "DE",
+                "state": null,
                 "voucher": null,
                 "tax_rate": "0.00",
                 "tax_value": "0.00",
@@ -536,6 +557,12 @@ Fetching individual orders
               "full_name": "Peter",
             },
             "attendee_email": null,
+            "company": "Sample company",
+            "street": "Test street 12",
+            "zipcode": "12345",
+            "city": "Testington",
+            "country": "DE",
+            "state": null,
             "voucher": null,
             "tax_rate": "0.00",
             "tax_rule": null,
@@ -816,9 +843,9 @@ Creating orders
    * ``consume_carts`` (optional) – A list of cart IDs. All cart positions with these IDs will be deleted if the
      order creation is successful. Any quotas or seats that become free by this operation will be credited to your order
      creation.
-   * ``email``
+   * ``email`` (optional)
    * ``locale``
-   * ``sales_channel``
+   * ``sales_channel`` (optional)
    * ``payment_provider`` (optional) – The identifier of the payment provider set for this order. This needs to be an
      existing payment provider. You should use ``"free"`` for free orders, and we strongly advise to use ``"manual"``
      for all orders you create as paid. This field is optional when the order status is ``"n"`` or the order total is
@@ -851,15 +878,21 @@ Creating orders
 
       * ``positionid`` (optional, see below)
       * ``item``
-      * ``variation``
+      * ``variation`` (optional)
       * ``price`` (optional, if set to ``null`` or missing the price will be computed from the given product)
       * ``seat`` (The ``seat_guid`` attribute of a seat. Required when the specified ``item`` requires a seat, otherwise must be ``null``.)
-      * ``attendee_name`` **or** ``attendee_name_parts``
+      * ``attendee_name`` **or** ``attendee_name_parts`` (optional)
       * ``voucher`` (optional, the ``code`` attribute of a valid voucher)
-      * ``attendee_email``
+      * ``attendee_email`` (optional)
+      * ``company`` (optional)
+      * ``street`` (optional)
+      * ``zipcode`` (optional)
+      * ``city`` (optional)
+      * ``country`` (optional)
+      * ``state`` (optional)
       * ``secret`` (optional)
       * ``addon_to`` (optional, see below)
-      * ``subevent``
+      * ``subevent`` (optional)
       * ``answers``
 
         * ``question``
@@ -891,6 +924,13 @@ Creating orders
    IDs in the ``addon_to`` field of another position. Note that all add_ons for a specific position need to come
    immediately after the position itself.
 
+   Starting with pretix 3.7, you can add ``"simulate": true`` to the body to do a "dry run" of your order. This will
+   validate your order and return you an order object with the resulting prices, but will not create an actual order.
+   You can use this for testing or to look up prices. In this case, some attributes are ignored, such as whether
+   to send an email or what payment provider will be used. Note that some returned fields will contain empty values
+   (e.g. all ``id`` fields of positions will be zero) and some will contain fake values (e.g. the order code will
+   always be ``PREVIEW``). pretix plugins will not be triggered, so some special behavior might be missing as well.
+
    **Example request**:
 
    .. sourcecode:: http
@@ -1050,6 +1090,42 @@ Order state operations
    :statuscode 403: The requested organizer/event does not exist **or** you have no permission to view this resource.
    :statuscode 404: The requested order does not exist.
 
+.. http:post:: /api/v1/organizers/(organizer)/events/(event)/orders/(code)/reactivate/
+
+   Reactivates a canceled order. This will set the order to pending or paid state. Only possible if all products are
+   still available.
+
+   **Example request**:
+
+   .. sourcecode:: http
+
+      POST /api/v1/organizers/bigevents/events/sampleconf/orders/ABC12/reactivate/ 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
+
+      {
+        "code": "ABC12",
+        "status": "n",
+        ...
+      }
+
+   :param organizer: The ``slug`` field of the organizer to modify
+   :param event: The ``slug`` field of the event to modify
+   :param code: The ``code`` field of the order to modify
+   :statuscode 200: no error
+   :statuscode 400: The order cannot be reactivated
+   :statuscode 401: Authentication failure
+   :statuscode 403: The requested organizer/event does not exist **or** you have no permission to view this resource.
+   :statuscode 404: The requested order does not exist.
+
 .. http:post:: /api/v1/organizers/(organizer)/events/(event)/orders/(code)/mark_pending/
 
    Marks a paid order as unpaid.

doc/development/api/customview.rst

@@ -66,7 +66,7 @@ event-related views, there is also a signal that allows you to add the view to t
 
     from django.urls import resolve, reverse
     from django.dispatch import receiver
-    from django.utils.translation import ugettext_lazy as _
+    from django.utils.translation import gettext_lazy as _
     from pretix.control.signals import nav_event
 
 

doc/development/api/general.rst

@@ -20,7 +20,7 @@ Order events
 There are multiple signals that will be sent out in the ordering cycle:
 
 .. automodule:: pretix.base.signals
-   :members: validate_cart, validate_cart_addons, validate_order, order_fee_calculation, order_paid, order_placed, order_canceled, order_expired, order_modified, order_changed, order_approved, order_denied, order_fee_type_name, allow_ticket_download, order_split, order_gracefully_delete, invoice_line_text
+   :members: validate_cart, validate_cart_addons, validate_order, order_fee_calculation, order_paid, order_placed, order_canceled, order_reactivated, order_expired, order_modified, order_changed, order_approved, order_denied, order_fee_type_name, allow_ticket_download, order_split, order_gracefully_delete, invoice_line_text
 
 Check-ins
 """""""""
@@ -33,11 +33,11 @@ Frontend
 --------
 
 .. automodule:: pretix.presale.signals
-   :members: html_head, html_footer, footer_link, front_page_top, front_page_bottom, front_page_bottom_widget, fee_calculation_for_cart, contact_form_fields, question_form_fields, checkout_confirm_messages, checkout_confirm_page_content, checkout_all_optional, html_page_header, sass_preamble, sass_postamble, render_seating_plan, checkout_flow_steps, position_info, item_description
+   :members: html_head, html_footer, footer_link, front_page_top, front_page_bottom, front_page_bottom_widget, fee_calculation_for_cart, contact_form_fields, question_form_fields, checkout_confirm_messages, checkout_confirm_page_content, checkout_all_optional, html_page_header, sass_preamble, sass_postamble, render_seating_plan, checkout_flow_steps, position_info, position_info_top, item_description
 
 
 .. automodule:: pretix.presale.signals
-   :members: order_info, order_meta_from_request
+   :members: order_info, order_info_top, order_meta_from_request
 
 Request flow
 """"""""""""

doc/development/api/plugins.rst

@@ -61,7 +61,7 @@ A working example would be::
         from pretix.base.plugins import PluginConfig
     except ImportError:
         raise RuntimeError("Please use pretix 2.7 or above to run this plugin!")
-    from django.utils.translation import ugettext_lazy as _
+    from django.utils.translation import gettext_lazy as _
 
 
     class PaypalApp(PluginConfig):

doc/development/api/ticketoutput.rst

@@ -72,6 +72,10 @@ The output class
 
    .. autoattribute:: download_button_icon
 
+   .. autoattribute:: multi_download_button_text
+
+   .. autoattribute:: long_download_button_text
+
    .. autoattribute:: preview_allowed
 
    .. autoattribute:: javascript_required

doc/development/contribution/style.rst

@@ -18,7 +18,7 @@ Coding style and quality
 * We expect all new code to come with proper tests. When writing new tests, please write them using `pytest-style`_
   test functions and raw ``assert`` statements. Use `fixtures`_ to prevent repetitive code. Some old parts of pretix'
   test suite are in the style of Python's unit test module. If you extend those files, you might continue in this style,
-  but please use pytest style for any new test files.
+  but please use ``pytest`` style for any new test files.
 
 * Please keep the first line of your commit messages short. When referencing an issue, please phrase it like
   ``Fix #123 -- Problems with order creation`` or ``Refs #123 -- Fix this part of that bug``.

doc/development/implementation/logging.rst

@@ -69,7 +69,7 @@ We now need a way to translate the action codes like ``pretix.event.changed`` in
 strings. The :py:attr:`pretix.base.signals.logentry_display` signals allows you to do so. A simple
 implementation could look like::
 
-    from django.utils.translation import ugettext as _
+    from django.utils.translation import gettext as _
     from pretix.base.signals import logentry_display
 
     @receiver(signal=logentry_display)

doc/plugins/digital.rst

@@ -0,0 +1,277 @@
+Digital content
+===============
+
+The digital content plugin provides a HTTP API that allows you to create new digital content for your ticket holders,
+such as live streams, videos, or material downloads.
+
+Resource description
+--------------------
+
+The digital content resource contains the following public fields:
+
+.. rst-class:: rest-resource-table
+
+===================================== ========================== =======================================================
+Field                                 Type                       Description
+===================================== ========================== =======================================================
+id                                    integer                    Internal content ID
+title                                 multi-lingual string       The content title (required)
+content_type                          string                     The type of content, valid values are ``webinar``, ``video``, ``livestream``, ``link``, ``file``
+url                                   string                     The location of the digital content
+description                           multi-lingual string       A public description of the item. May contain Markdown
+                                                                 syntax and is not required.
+available_from                        datetime                   The first date time at which this content will be shown
+                                                                 (or ``null``).
+available_until                       datetime                   The last date time at which this content will b e shown
+                                                                 (or ``null``).
+all_products                          boolean                    If ``true``, the content is available to all buyers of tickets for this event. The ``limit_products`` field is ignored in this case.
+limit_products                        list of integers           List of product/item IDs. This content is only shown to buyers of these ticket types.
+position                              integer                    An integer, used for sorting
+subevent                              integer                    Date in an event series this content should be shown for. Should be ``null`` if this is not an event series or if this should be shown to all customers.
+===================================== ========================== =======================================================
+
+Endpoints
+---------
+
+.. http:get:: /api/v1/organizers/(organizer)/events/(event)/digitalcontents/
+
+   Returns a list of all digital content configured for an event.
+
+   **Example request**:
+
+   .. sourcecode:: http
+
+      GET /api/v1/organizers/bigevents/events/sampleconf/digitalcontents/ 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,
+            "subevent": null,
+            "title": {
+                "en": "Concert livestream"
+            },
+            "content_type": "link",
+            "url": "https://www.youtube.com/watch?v=dQw4w9WgXcQ",
+            "description": {
+                "en": "Watch our event live here on YouTube!"
+            },
+            "all_products": true,
+            "limit_products": [],
+            "available_from": "2020-03-22T23:00:00Z",
+            "available_until": null,
+            "position": 1
+          }
+        ]
+      }
+
+   :query page: The page number in case of a multi-page result set, default is 1
+   :param organizer: The ``slug`` field of a valid organizer
+   :param event: The ``slug`` field of the event to fetch
+   :statuscode 200: no error
+   :statuscode 401: Authentication failure
+   :statuscode 403: The requested organizer or event does not exist **or** you have no permission to view it.
+
+.. http:get:: /api/v1/organizers/(organizer)/events/(event)/digitalcontents/(id)/
+
+   Returns information on one content item, identified by its ID.
+
+   **Example request**:
+
+   .. sourcecode:: http
+
+      GET /api/v1/organizers/bigevents/events/sampleconf/digitalcontents/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,
+        "subevent": null,
+        "title": {
+            "en": "Concert livestream"
+        },
+        "content_type": "link",
+        "url": "https://www.youtube.com/watch?v=dQw4w9WgXcQ",
+        "description": {
+            "en": "Watch our event live here on YouTube!"
+        },
+        "all_products": true,
+        "limit_products": [],
+        "available_from": "2020-03-22T23:00:00Z",
+        "available_until": null,
+        "position": 1
+      }
+
+   :param organizer: The ``slug`` field of the organizer to fetch
+   :param event: The ``slug`` field of the event to fetch
+   :param id: The ``id`` field of the content to fetch
+   :statuscode 200: no error
+   :statuscode 401: Authentication failure
+   :statuscode 403: The requested organizer/event/content does not exist **or** you have no permission to view it.
+
+.. http:post:: /api/v1/organizers/(organizer)/events/(event)/digitalcontents/
+
+   Create a new digital content.
+
+   **Example request**:
+
+   .. sourcecode:: http
+
+      POST /api/v1/organizers/bigevents/events/sampleconf/digitalcontents/ HTTP/1.1
+      Host: pretix.eu
+      Accept: application/json, text/javascript
+      Content-Type: application/json
+      Content-Length: 166
+
+      {
+        "subevent": null,
+        "title": {
+            "en": "Concert livestream"
+        },
+        "content_type": "link",
+        "url": "https://www.youtube.com/watch?v=dQw4w9WgXcQ",
+        "description": {
+            "en": "Watch our event live here on YouTube!"
+        },
+        "all_products": true,
+        "limit_products": [],
+        "available_from": "2020-03-22T23:00:00Z",
+        "available_until": null,
+        "position": 1
+      }
+
+   **Example response**:
+
+   .. sourcecode:: http
+
+      HTTP/1.1 201 Created
+      Vary: Accept
+      Content-Type: application/json
+
+      {
+        "id": 2,
+        "subevent": null,
+        "title": {
+            "en": "Concert livestream"
+        },
+        "content_type": "link",
+        "url": "https://www.youtube.com/watch?v=dQw4w9WgXcQ",
+        "description": {
+            "en": "Watch our event live here on YouTube!"
+        },
+        "all_products": true,
+        "limit_products": [],
+        "available_from": "2020-03-22T23:00:00Z",
+        "available_until": null,
+        "position": 1
+      }
+
+   :param organizer: The ``slug`` field of the organizer to create new content for
+   :param event: The ``slug`` field of the event to create new content for
+   :statuscode 201: no error
+   :statuscode 400: The content could not be created due to invalid submitted data.
+   :statuscode 401: Authentication failure
+   :statuscode 403: The requested organizer/event does not exist **or** you have no permission to create digital contents.
+
+
+.. http:patch:: /api/v1/organizers/(organizer)/events/(event)/digitalcontents/(id)/
+
+   Update a content. You can also use ``PUT`` instead of ``PATCH``. With ``PUT``, you have to provide all fields of
+   the resource, other fields will be reset to default. With ``PATCH``, you only need to provide the fields that you
+   want to change.
+
+   **Example request**:
+
+   .. sourcecode:: http
+
+      PATCH /api/v1/organizers/bigevents/events/sampleconf/digitalcontents/1/ HTTP/1.1
+      Host: pretix.eu
+      Accept: application/json, text/javascript
+      Content-Type: application/json
+      Content-Length: 34
+
+      {
+        "url": "https://mywebsite.com"
+      }
+
+   **Example response**:
+
+   .. sourcecode:: http
+
+      HTTP/1.1 200 OK
+      Vary: Accept
+      Content-Type: text/javascript
+
+      {
+        "id": 2,
+        "subevent": null,
+        "title": {
+            "en": "Concert livestream"
+        },
+        "content_type": "link",
+        "url": "https://mywebsite.com",
+        "description": {
+            "en": "Watch our event live here on YouTube!"
+        },
+        "all_products": true,
+        "limit_products": [],
+        "available_from": "2020-03-22T23:00:00Z",
+        "available_until": null,
+        "position": 1
+      }
+
+   :param organizer: The ``slug`` field of the organizer to modify
+   :param event: The ``slug`` field of the event to modify
+   :param id: The ``id`` field of the content to modify
+   :statuscode 200: no error
+   :statuscode 400: The content could not be modified due to invalid submitted data.
+   :statuscode 401: Authentication failure
+   :statuscode 403: The requested organizer/event/content does not exist **or** you have no permission to change it.
+
+
+.. http:delete:: /api/v1/organizers/(organizer)/events/(event)/digitalcontents/(id)/
+
+   Delete a digital content.
+
+   **Example request**:
+
+   .. sourcecode:: http
+
+      DELETE /api/v1/organizers/bigevents/events/sampleconf/digitalcontents/1/ HTTP/1.1
+      Host: pretix.eu
+      Accept: application/json, text/javascript
+
+   **Example response**:
+
+   .. sourcecode:: http
+
+      HTTP/1.1 204 No Content
+      Vary: Accept
+
+   :param organizer: The ``slug`` field of the organizer to modify
+   :param event: The ``slug`` field of the event to modify
+   :param id: The ``id`` field of the content to delete
+   :statuscode 204: no error
+   :statuscode 401: Authentication failure
+   :statuscode 403: The requested organizer/event/content does not exist **or** you have no permission to change it

doc/plugins/index.rst

@@ -15,3 +15,4 @@ If you want to **create** a plugin, please go to the
    ticketoutputpdf
    badges
    campaigns
+   digital

doc/user/events/widget.rst

@@ -114,6 +114,17 @@ If you want to disable voucher input in the widget, you can pass the ``disable-v
 
    <pretix-widget event="https://pretix.eu/demo/democon/" disable-vouchers></pretix-widget>
 
+Filtering products
+------------------
+
+You can filter the products shown in the widget by passing in a list of product IDs::
+
+   <pretix-widget event="https://pretix.eu/demo/democon/" items="23,42"></pretix-widget>
+
+Alternatively, you can select one or more categories to be shown::
+
+   <pretix-widget event="https://pretix.eu/demo/democon/" categories="12,25"></pretix-widget>
+
 Multi-event selection
 ---------------------
 

doc/user/organizers/domain.rst

@@ -14,30 +14,23 @@ and with pretix, you can do this. On this page, you find out the necessary steps
 With the pretix.eu hosted service
 ---------------------------------
 
-Step 1: DNS Configuration
-#########################
+Go to "Organizers" in the backend and select your organizer account. Then, go to "Settings" and "Custom Domain".
+
+This page will show you instructions on how to set up your own domain. Basically, it works like this:
 
 Go to the website of the provider you registered your domain name with. Look for the "DNS" settings page in their
 interface. Unfortunately, we can't tell you exactly how that is named and how it looks, since it is different for every
 domain provider.
 
 Use this interface to add a new subdomain record, e.g. ``tickets`` of the type ``CNAME`` (might also be called "alias").
-The value of the record should be ``www.pretix.eu``.
-
-Step 2: Wait for the DNS entry to propagate
-###########################################
+The value of the record should be the one shown on the "Custom Domain" page in pretix' backend.
 
 Submit your changes and wait a bit, it can regularly take up to three hours for DNS changes to propagate to the caches
 of all DNS servers. You can try checking by accessing your new subdomain, ``http://tickets.awesomepartycorp.com``.
 If DNS was changed successfully, you should see a SSL certificate error. If you ignore the error and access the page
 anyways, you should get a pretix-themed error page with the headline "Unknown domain".
 
-Step 3: Tell us
-###############
-
-Write an email to support@pretix.eu, naming your new domain and your organizer account. We will then generate a SSL
-certificate for you (for free!) and configure the domain.
-
+Now, tell us about your domain on the "Custom Domain" page to get started.
 
 With a custom pretix installation
 ---------------------------------

src/pretix/__init__.py

@@ -1 +1 @@
-__version__ = "3.6.0"
+__version__ = "3.9.0.dev0"

src/pretix/api/models.py

@@ -3,7 +3,7 @@ from datetime import timedelta
 from django.db import models
 from django.urls import reverse
 from django.utils.timezone import now
-from django.utils.translation import ugettext_lazy as _
+from django.utils.translation import gettext_lazy as _
 from oauth2_provider.generators import (
     generate_client_id, generate_client_secret,
 )

src/pretix/api/serializers/cart.py

@@ -2,7 +2,7 @@ from datetime import timedelta
 
 from django.utils.crypto import get_random_string
 from django.utils.timezone import now
-from django.utils.translation import ugettext_lazy
+from django.utils.translation import gettext_lazy
 from rest_framework import serializers
 from rest_framework.exceptions import ValidationError
 
@@ -56,7 +56,7 @@ class CartPositionCreateSerializer(I18nAwareModelSerializer):
                           else validated_data.get('item').quotas.filter(subevent=validated_data.get('subevent')))
             if len(new_quotas) == 0:
                 raise ValidationError(
-                    ugettext_lazy('The product "{}" is not assigned to a quota.').format(
+                    gettext_lazy('The product "{}" is not assigned to a quota.').format(
                         str(validated_data.get('item'))
                     )
                 )
@@ -64,8 +64,8 @@ class CartPositionCreateSerializer(I18nAwareModelSerializer):
                 avail = quota.availability()
                 if avail[0] != Quota.AVAILABILITY_OK or (avail[1] is not None and avail[1] < 1):
                     raise ValidationError(
-                        ugettext_lazy('There is not enough quota available on quota "{}" to perform '
-                                      'the operation.').format(
+                        gettext_lazy('There is not enough quota available on quota "{}" to perform '
+                                     'the operation.').format(
                             quota.name
                         )
                     )
@@ -88,7 +88,7 @@ class CartPositionCreateSerializer(I18nAwareModelSerializer):
                 else:
                     validated_data['seat'] = seat
                     if not seat.is_available(sales_channel=validated_data.get('sales_channel', 'web')):
-                        raise ValidationError(ugettext_lazy('The selected seat "{seat}" is not available.').format(seat=seat.name))
+                        raise ValidationError(gettext_lazy('The selected seat "{seat}" is not available.').format(seat=seat.name))
             elif seated:
                 raise ValidationError('The specified product requires to choose a seat.')
 

src/pretix/api/serializers/checkin.py

@@ -1,4 +1,4 @@
-from django.utils.translation import ugettext as _
+from django.utils.translation import gettext as _
 from rest_framework import serializers
 from rest_framework.exceptions import ValidationError
 

src/pretix/api/serializers/event.py

@@ -2,7 +2,7 @@ from django.conf import settings
 from django.core.exceptions import ValidationError
 from django.db import transaction
 from django.utils.functional import cached_property
-from django.utils.translation import ugettext as _
+from django.utils.translation import gettext as _
 from django_countries.serializers import CountryFieldMixin
 from hierarkey.proxy import HierarkeyProxy
 from pytz import common_timezones
@@ -34,6 +34,19 @@ class MetaDataField(Field):
         }
 
 
+class MetaPropertyField(Field):
+
+    def to_representation(self, value):
+        return {
+            v.name: v.default for v in value.item_meta_properties.all()
+        }
+
+    def to_internal_value(self, data):
+        return {
+            'item_meta_properties': data
+        }
+
+
 class SeatCategoryMappingField(Field):
 
     def to_representation(self, value):
@@ -77,6 +90,7 @@ class TimeZoneField(ChoiceField):
 
 class EventSerializer(I18nAwareModelSerializer):
     meta_data = MetaDataField(required=False, source='*')
+    item_meta_properties = MetaPropertyField(required=False, source='*')
     plugins = PluginsField(required=False, source='*')
     seat_category_mapping = SeatCategoryMappingField(source='*', required=False)
     timezone = TimeZoneField(required=False, choices=[(a, a) for a in common_timezones])
@@ -86,7 +100,7 @@ class EventSerializer(I18nAwareModelSerializer):
         fields = ('name', 'slug', 'live', 'testmode', 'currency', 'date_from',
                   'date_to', 'date_admission', 'is_public', 'presale_start',
                   'presale_end', 'location', 'geo_lat', 'geo_lon', 'has_subevents', 'meta_data', 'seating_plan',
-                  'plugins', 'seat_category_mapping', 'timezone')
+                  'plugins', 'seat_category_mapping', 'timezone', 'item_meta_properties')
 
     def validate(self, data):
         data = super().validate(data)
@@ -131,6 +145,12 @@ class EventSerializer(I18nAwareModelSerializer):
                 raise ValidationError(_('Meta data property \'{name}\' does not exist.').format(name=key))
         return value
 
+    @cached_property
+    def item_meta_props(self):
+        return {
+            p.name: p for p in self.context['request'].event.item_meta_properties.all()
+        }
+
     def validate_seating_plan(self, value):
         if value and value.organizer != self.context['request'].organizer:
             raise ValidationError('Invalid seating plan.')
@@ -172,6 +192,7 @@ class EventSerializer(I18nAwareModelSerializer):
     @transaction.atomic
     def create(self, validated_data):
         meta_data = validated_data.pop('meta_data', None)
+        item_meta_properties = validated_data.pop('item_meta_properties', None)
         validated_data.pop('seat_category_mapping', None)
         plugins = validated_data.pop('plugins', settings.PRETIX_PLUGINS_DEFAULT.split(','))
         tz = validated_data.pop('timezone', None)
@@ -188,6 +209,15 @@ class EventSerializer(I18nAwareModelSerializer):
                     value=value
                 )
 
+        # Item Meta properties
+        if item_meta_properties is not None:
+            for key, value in item_meta_properties.items():
+                event.item_meta_properties.create(
+                    name=key,
+                    default=value,
+                    event=event
+                )
+
         # Seats
         if event.seating_plan:
             generate_seats(event, None, event.seating_plan, {})
@@ -202,6 +232,7 @@ class EventSerializer(I18nAwareModelSerializer):
     @transaction.atomic
     def update(self, instance, validated_data):
         meta_data = validated_data.pop('meta_data', None)
+        item_meta_properties = validated_data.pop('item_meta_properties', None)
         plugins = validated_data.pop('plugins', None)
         seat_category_mapping = validated_data.pop('seat_category_mapping', None)
         tz = validated_data.pop('timezone', None)
@@ -228,6 +259,26 @@ class EventSerializer(I18nAwareModelSerializer):
                 if prop.name not in meta_data:
                     current_object.delete()
 
+        # Item Meta properties
+        if item_meta_properties is not None:
+            current = [imp for imp in event.item_meta_properties.all()]
+            for key, value in item_meta_properties.items():
+                prop = self.item_meta_props.get(key)
+                if prop in current:
+                    prop.default = value
+                    prop.save()
+                else:
+                    prop = event.item_meta_properties.create(
+                        name=key,
+                        default=value,
+                        event=event
+                    )
+                    current.append(prop)
+
+            for prop in current:
+                if prop.name not in list(item_meta_properties.keys()):
+                    prop.delete()
+
         # Seats
         if seat_category_mapping is not None or ('seating_plan' in validated_data and validated_data['seating_plan'] is None):
             current_mappings = {
@@ -481,6 +532,9 @@ class EventSettingsSerializer(serializers.Serializer):
         'checkout_email_helptext',
         'presale_has_ended_text',
         'voucher_explanation_text',
+        'banner_text',
+        'banner_text_bottom',
+        'show_dates_on_frontpage',
         'show_date_to',
         'show_times',
         'show_items_outside_presale_period',
@@ -506,6 +560,10 @@ class EventSettingsSerializer(serializers.Serializer):
         'attendee_names_required',
         'attendee_emails_asked',
         'attendee_emails_required',
+        'attendee_addresses_asked',
+        'attendee_addresses_required',
+        'attendee_company_asked',
+        'attendee_company_required',
         'confirm_text',
         'order_email_asked_twice',
         'payment_term_days',
@@ -528,6 +586,7 @@ class EventSettingsSerializer(serializers.Serializer):
         'invoice_address_vatid',
         'invoice_address_company_required',
         'invoice_address_beneficiary',
+        'invoice_address_custom_field',
         'invoice_name_required',
         'invoice_address_not_asked_free',
         'invoice_show_payments',
@@ -558,6 +617,10 @@ class EventSettingsSerializer(serializers.Serializer):
         'cancel_allow_user_paid_keep',
         'cancel_allow_user_paid_keep_fees',
         'cancel_allow_user_paid_keep_percentage',
+        'cancel_allow_user_paid_adjust_fees',
+        'cancel_allow_user_paid_adjust_fees_explanation',
+        'cancel_allow_user_paid_refund_as_giftcard',
+        'cancel_allow_user_paid_require_approval',
     ]
 
     def __init__(self, *args, **kwargs):

src/pretix/api/serializers/fields.py

@@ -0,0 +1,29 @@
+from collections import OrderedDict
+
+from rest_framework import serializers
+
+
+def remove_duplicates_from_list(data):
+    return list(OrderedDict.fromkeys(data))
+
+
+class ListMultipleChoiceField(serializers.MultipleChoiceField):
+    def to_internal_value(self, data):
+        if isinstance(data, str) or not hasattr(data, '__iter__'):
+            self.fail('not_a_list', input_type=type(data).__name__)
+        if not self.allow_empty and len(data) == 0:
+            self.fail('empty')
+
+        internal_value_data = [
+            super(serializers.MultipleChoiceField, self).to_internal_value(item)
+            for item in data
+        ]
+
+        return remove_duplicates_from_list(internal_value_data)
+
+    def to_representation(self, value):
+        representation_data = [
+            self.choice_strings_to_values.get(str(item), item) for item in value
+        ]
+
+        return remove_duplicates_from_list(representation_data)

src/pretix/api/serializers/item.py

@@ -2,13 +2,15 @@ from decimal import Decimal
 
 from django.core.exceptions import ValidationError
 from django.db import transaction
-from django.utils.translation import ugettext_lazy as _
+from django.utils.functional import cached_property
+from django.utils.translation import gettext_lazy as _
 from rest_framework import serializers
 
+from pretix.api.serializers.event import MetaDataField
 from pretix.api.serializers.i18n import I18nAwareModelSerializer
 from pretix.base.models import (
-    Item, ItemAddOn, ItemBundle, ItemCategory, ItemVariation, Question,
-    QuestionOption, Quota,
+    Item, ItemAddOn, ItemBundle, ItemCategory, ItemMetaValue, ItemVariation,
+    Question, QuestionOption, Quota,
 )
 
 
@@ -110,6 +112,7 @@ class ItemSerializer(I18nAwareModelSerializer):
     bundles = InlineItemBundleSerializer(many=True, required=False)
     variations = InlineItemVariationSerializer(many=True, required=False)
     tax_rate = ItemTaxRateField(source='*', read_only=True)
+    meta_data = MetaDataField(required=False, source='*')
 
     class Meta:
         model = Item
@@ -119,7 +122,7 @@ class ItemSerializer(I18nAwareModelSerializer):
                   'require_voucher', 'hide_without_voucher', 'allow_cancel', 'require_bundling',
                   'min_per_order', 'max_per_order', 'checkin_attention', 'has_variations', 'variations',
                   'addons', 'bundles', 'original_price', 'require_approval', 'generate_tickets',
-                  'show_quota_left', 'hidden_if_available', 'allow_waitinglist', 'issue_giftcard')
+                  'show_quota_left', 'hidden_if_available', 'allow_waitinglist', 'issue_giftcard', 'meta_data')
         read_only_fields = ('has_variations', 'picture')
 
     def validate(self, data):
@@ -167,18 +170,65 @@ class ItemSerializer(I18nAwareModelSerializer):
                 ItemAddOn.clean_max_min_count(addon_data['max_count'], addon_data['min_count'])
         return value
 
+    @cached_property
+    def item_meta_properties(self):
+        return {
+            p.name: p for p in self.context['request'].event.item_meta_properties.all()
+        }
+
+    def validate_meta_data(self, value):
+        for key in value['meta_data'].keys():
+            if key not in self.item_meta_properties:
+                raise ValidationError(_('Item meta data property \'{name}\' does not exist.').format(name=key))
+        return value
+
     @transaction.atomic
     def create(self, validated_data):
         variations_data = validated_data.pop('variations') if 'variations' in validated_data else {}
         addons_data = validated_data.pop('addons') if 'addons' in validated_data else {}
         bundles_data = validated_data.pop('bundles') if 'bundles' in validated_data else {}
+        meta_data = validated_data.pop('meta_data', None)
         item = Item.objects.create(**validated_data)
+
         for variation_data in variations_data:
             ItemVariation.objects.create(item=item, **variation_data)
         for addon_data in addons_data:
             ItemAddOn.objects.create(base_item=item, **addon_data)
         for bundle_data in bundles_data:
             ItemBundle.objects.create(base_item=item, **bundle_data)
+
+        # Meta data
+        if meta_data is not None:
+            for key, value in meta_data.items():
+                ItemMetaValue.objects.create(
+                    property=self.item_meta_properties.get(key),
+                    value=value,
+                    item=item
+                )
+        return item
+
+    def update(self, instance, validated_data):
+        meta_data = validated_data.pop('meta_data', None)
+        item = super().update(instance, validated_data)
+
+        # Meta data
+        if meta_data is not None:
+            current = {mv.property: mv for mv in item.meta_values.select_related('property')}
+            for key, value in meta_data.items():
+                prop = self.item_meta_properties.get(key)
+                if prop in current:
+                    current[prop].value = value
+                    current[prop].save()
+                else:
+                    item.meta_values.create(
+                        property=self.item_meta_properties.get(key),
+                        value=value
+                    )
+
+            for prop, current_object in current.items():
+                if prop.name not in meta_data:
+                    current_object.delete()
+
         return item
 
 
@@ -237,8 +287,8 @@ class QuestionSerializer(I18nAwareModelSerializer):
         if value:
             if value.type not in (Question.TYPE_CHOICE, Question.TYPE_BOOLEAN, Question.TYPE_CHOICE_MULTIPLE):
                 raise ValidationError('Question dependencies can only be set to boolean or choice questions.')
-        if value == self.instance:
-            raise ValidationError('A question cannot depend on itself.')
+            if value == self.instance:
+                raise ValidationError('A question cannot depend on itself.')
         return value
 
     def validate(self, data):

src/pretix/api/serializers/order.py

@@ -5,7 +5,7 @@ from decimal import Decimal
 import pycountry
 from django.db.models import F, Q
 from django.utils.timezone import now
-from django.utils.translation import ugettext_lazy
+from django.utils.translation import gettext_lazy
 from django_countries.fields import Country
 from rest_framework import serializers
 from rest_framework.exceptions import ValidationError
@@ -25,6 +25,7 @@ from pretix.base.models.orders import (
 )
 from pretix.base.pdf import get_variables
 from pretix.base.services.cart import error_messages
+from pretix.base.services.locking import NoLockManager
 from pretix.base.services.pricing import get_price
 from pretix.base.settings import COUNTRIES_WITH_STATE_IN_ADDRESS
 from pretix.base.signals import register_ticket_outputs
@@ -38,7 +39,7 @@ class CompatibleCountryField(serializers.Field):
     def to_representation(self, instance: InvoiceAddress):
         if instance.country:
             return str(instance.country)
-        else:
+        elif hasattr(instance, 'country_old'):
             return instance.country_old
 
 
@@ -96,6 +97,11 @@ class AnswerQuestionOptionsIdentifierField(serializers.Field):
         return [o.identifier for o in instance.options.all()]
 
 
+class AnswerQuestionOptionsField(serializers.Field):
+    def to_representation(self, instance: QuestionAnswer):
+        return [o.pk for o in instance.options.all()]
+
+
 class InlineSeatSerializer(I18nAwareModelSerializer):
 
     class Meta:
@@ -106,6 +112,7 @@ class InlineSeatSerializer(I18nAwareModelSerializer):
 class AnswerSerializer(I18nAwareModelSerializer):
     question_identifier = AnswerQuestionIdentifierField(source='*', read_only=True)
     option_identifiers = AnswerQuestionOptionsIdentifierField(source='*', read_only=True)
+    options = AnswerQuestionOptionsField(source='*', read_only=True)
 
     class Meta:
         model = QuestionAnswer
@@ -189,6 +196,11 @@ class PdfDataSerializer(serializers.Field):
             for k, v in ev._cached_meta_data.items():
                 res['meta:' + k] = v
 
+            if not hasattr(instance.item, '_cached_meta_data'):
+                instance.item._cached_meta_data = instance.item.meta_data
+            for k, v in instance.item._cached_meta_data.items():
+                res['itemmeta:' + k] = v
+
         return res
 
 
@@ -199,10 +211,12 @@ class OrderPositionSerializer(I18nAwareModelSerializer):
     order = serializers.SlugRelatedField(slug_field='code', read_only=True)
     pdf_data = PdfDataSerializer(source='*')
     seat = InlineSeatSerializer(read_only=True)
+    country = CompatibleCountryField(source='*')
 
     class Meta:
         model = OrderPosition
         fields = ('id', 'order', 'positionid', 'item', 'variation', 'price', 'attendee_name', 'attendee_name_parts',
+                  'company', 'street', 'zipcode', 'city', 'country', 'state',
                   'attendee_email', 'voucher', 'tax_rate', 'tax_value', 'secret', 'addon_to', 'subevent', 'checkins',
                   'downloads', 'answers', 'tax_rule', 'pseudonymization_id', 'pdf_data', 'seat', 'canceled')
 
@@ -504,12 +518,22 @@ class OrderPositionCreateSerializer(I18nAwareModelSerializer):
                                      max_digits=10)
     voucher = serializers.SlugRelatedField(slug_field='code', queryset=Voucher.objects.none(),
                                            required=False, allow_null=True)
+    country = CompatibleCountryField(source='*')
 
     class Meta:
         model = OrderPosition
         fields = ('positionid', 'item', 'variation', 'price', 'attendee_name', 'attendee_name_parts', 'attendee_email',
+                  'company', 'street', 'zipcode', 'city', 'country', 'state',
                   'secret', 'addon_to', 'subevent', 'answers', 'seat', 'voucher')
 
+    def __init__(self, *args, **kwargs):
+        super().__init__(*args, **kwargs)
+        for k, v in self.fields.items():
+            if k in ('company', 'street', 'zipcode', 'city', 'country', 'state'):
+                v.required = False
+                v.allow_blank = True
+                v.allow_null = True
+
     def validate_secret(self, secret):
         if secret and OrderPosition.all.filter(order__event=self.context['event'], secret=secret).exists():
             raise ValidationError(
@@ -564,6 +588,24 @@ class OrderPositionCreateSerializer(I18nAwareModelSerializer):
             )
         if data.get('attendee_name_parts') and '_scheme' not in data.get('attendee_name_parts'):
             data['attendee_name_parts']['_scheme'] = self.context['request'].event.settings.name_scheme
+
+        if data.get('country'):
+            if not pycountry.countries.get(alpha_2=data.get('country')):
+                raise ValidationError(
+                    {'country': ['Invalid country code.']}
+                )
+
+        if data.get('state'):
+            cc = str(data.get('country') or self.instance.country or '')
+            if cc not in COUNTRIES_WITH_STATE_IN_ADDRESS:
+                raise ValidationError(
+                    {'state': ['States are not supported in country "{}".'.format(cc)]}
+                )
+            if not pycountry.subdivisions.get(code=cc + '-' + data.get('state')):
+                raise ValidationError(
+                    {'state': ['"{}" is not a known subdivision of the country "{}".'.format(data.get('state'), cc)]}
+                )
+
         return data
 
 
@@ -580,6 +622,28 @@ class CompatibleJSONField(serializers.JSONField):
         return value
 
 
+class WrappedList:
+    def __init__(self, data):
+        self._data = data
+
+    def all(self):
+        return self._data
+
+
+class WrappedModel:
+    def __init__(self, model):
+        self._wrapped = model
+
+    def __getattr__(self, item):
+        return getattr(self._wrapped, item)
+
+    def save(self, *args, **kwargs):
+        raise NotImplementedError
+
+    def delete(self, *args, **kwargs):
+        raise NotImplementedError
+
+
 class OrderCreateSerializer(I18nAwareModelSerializer):
     invoice_address = InvoiceAddressSerializer(required=False)
     positions = OrderPositionCreateSerializer(many=True, required=True)
@@ -600,6 +664,7 @@ class OrderCreateSerializer(I18nAwareModelSerializer):
     force = serializers.BooleanField(default=False, required=False)
     payment_date = serializers.DateTimeField(required=False, allow_null=True)
     send_mail = serializers.BooleanField(default=False, required=False)
+    simulate = serializers.BooleanField(default=False, required=False)
 
     def __init__(self, *args, **kwargs):
         super().__init__(*args, **kwargs)
@@ -609,7 +674,7 @@ class OrderCreateSerializer(I18nAwareModelSerializer):
         model = Order
         fields = ('code', 'status', 'testmode', 'email', 'locale', 'payment_provider', 'fees', 'comment', 'sales_channel',
                   'invoice_address', 'positions', 'checkin_attention', 'payment_info', 'payment_date', 'consume_carts',
-                  'force', 'send_mail')
+                  'force', 'send_mail', 'simulate')
 
     def validate_payment_provider(self, pp):
         if pp is None:
@@ -686,7 +751,7 @@ class OrderCreateSerializer(I18nAwareModelSerializer):
                 sales_channel = get_all_sales_channels()[self.initial_data['sales_channel']]
 
                 if testmode and not sales_channel.testmode_supported:
-                    raise ValidationError('This sales channel does not provide support for testmode.')
+                    raise ValidationError('This sales channel does not provide support for test mode.')
             except KeyError:
                 # We do not need to raise a ValidationError here, since there is another check to validate the
                 # sales_channel
@@ -701,6 +766,7 @@ class OrderCreateSerializer(I18nAwareModelSerializer):
         payment_info = validated_data.pop('payment_info', '{}')
         payment_date = validated_data.pop('payment_date', now())
         force = validated_data.pop('force', False)
+        simulate = validated_data.pop('simulate', False)
         self._send_mail = validated_data.pop('send_mail', False)
 
         if 'invoice_address' in validated_data:
@@ -714,7 +780,10 @@ class OrderCreateSerializer(I18nAwareModelSerializer):
         else:
             ia = None
 
-        with self.context['event'].lock() as now_dt:
+        lockfn = self.context['event'].lock
+        if simulate:
+            lockfn = NoLockManager
+        with lockfn() as now_dt:
             free_seats = set()
             seats_seen = set()
             consume_carts = validated_data.pop('consume_carts', [])
@@ -823,7 +892,7 @@ class OrderCreateSerializer(I18nAwareModelSerializer):
                     else:
                         pos_data['seat'] = seat
                         if (seat not in free_seats and not seat.is_available(sales_channel=validated_data.get('sales_channel', 'web'))) or seat in seats_seen:
-                            errs[i]['seat'] = [ugettext_lazy('The selected seat "{seat}" is not available.').format(seat=seat.name)]
+                            errs[i]['seat'] = [gettext_lazy('The selected seat "{seat}" is not available.').format(seat=seat.name)]
                         seats_seen.add(seat)
                 elif seated:
                     errs[i]['seat'] = ['The specified product requires to choose a seat.']
@@ -838,7 +907,7 @@ class OrderCreateSerializer(I18nAwareModelSerializer):
                                   if pos_data.get('variation')
                                   else pos_data.get('item').quotas.filter(subevent=pos_data.get('subevent')))
                     if len(new_quotas) == 0:
-                        errs[i]['item'] = [ugettext_lazy('The product "{}" is not assigned to a quota.').format(
+                        errs[i]['item'] = [gettext_lazy('The product "{}" is not assigned to a quota.').format(
                             str(pos_data.get('item'))
                         )]
                     else:
@@ -850,7 +919,7 @@ class OrderCreateSerializer(I18nAwareModelSerializer):
                                 quota_avail_cache[quota][1] -= 1
                                 if quota_avail_cache[quota][1] < 0:
                                     errs[i]['item'] = [
-                                        ugettext_lazy('There is not enough quota available on quota "{}" to perform the operation.').format(
+                                        gettext_lazy('There is not enough quota available on quota "{}" to perform the operation.').format(
                                             quota.name
                                         )
                                     ]
@@ -864,11 +933,20 @@ class OrderCreateSerializer(I18nAwareModelSerializer):
             order.set_expires(subevents=[p.get('subevent') for p in positions_data])
             order.meta_info = "{}"
             order.total = Decimal('0.00')
-            order.save()
+            if simulate:
+                order = WrappedModel(order)
+                order.last_modified = now()
+                order.code = 'PREVIEW'
+            else:
+                order.save()
 
             if ia:
-                ia.order = order
-                ia.save()
+                if not simulate:
+                    ia.order = order
+                    ia.save()
+                else:
+                    order.invoice_address = ia
+                    ia.last_modified = now()
 
             pos_map = {}
             for pos_data in positions_data:
@@ -880,7 +958,10 @@ class OrderCreateSerializer(I18nAwareModelSerializer):
                         '_legacy': attendee_name
                     }
                 pos = OrderPosition(**pos_data)
-                pos.order = order
+                if simulate:
+                    pos.order = order._wrapped
+                else:
+                    pos.order = order
                 if addon_to:
                     pos.addon_to = pos_map[addon_to]
 
@@ -911,19 +992,33 @@ class OrderCreateSerializer(I18nAwareModelSerializer):
                     invoice_address=ia,
                 ).gross
 
-                if pos.voucher:
-                    Voucher.objects.filter(pk=pos.voucher.pk).update(redeemed=F('redeemed') + 1)
-                pos.save()
+                if simulate:
+                    pos = WrappedModel(pos)
+                    pos.id = 0
+                    answers = []
+                    for answ_data in answers_data:
+                        options = answ_data.pop('options', [])
+                        answ = WrappedModel(QuestionAnswer(**answ_data))
+                        answ.options = WrappedList(options)
+                        answers.append(answ)
+                    pos.answers = answers
+                    pos.pseudonymization_id = "PREVIEW"
+                else:
+                    if pos.voucher:
+                        Voucher.objects.filter(pk=pos.voucher.pk).update(redeemed=F('redeemed') + 1)
+                    pos.save()
+                    for answ_data in answers_data:
+                        options = answ_data.pop('options', [])
+                        answ = pos.answers.create(**answ_data)
+                        answ.options.add(*options)
                 pos_map[pos.positionid] = pos
-                for answ_data in answers_data:
-                    options = answ_data.pop('options', [])
-                    answ = pos.answers.create(**answ_data)
-                    answ.options.add(*options)
 
-            for cp in delete_cps:
-                cp.delete()
+            if not simulate:
+                for cp in delete_cps:
+                    cp.delete()
 
-        order.total = sum([p.price for p in order.positions.all()])
+        order.total = sum([p.price for p in pos_map.values()])
+        fees = []
         for fee_data in fees_data:
             is_percentage = fee_data.pop('_treat_value_as_percentage', False)
             if is_percentage:
@@ -955,17 +1050,26 @@ class OrderCreateSerializer(I18nAwareModelSerializer):
                     fee_data['tax_rule'] = tr
                     fee_data['value'] = val
                     f = OrderFee(**fee_data)
-                    f.order = order
+                    f.order = order._wrapped if simulate else order
                     f._calculate_tax()
-                    f.save()
+                    fees.append(f)
+                    if not simulate:
+                        f.save()
             else:
                 f = OrderFee(**fee_data)
-                f.order = order
+                f.order = order._wrapped if simulate else order
                 f._calculate_tax()
-                f.save()
+                fees.append(f)
+                if not simulate:
+                    f.save()
 
-        order.total += sum([f.value for f in order.fees.all()])
-        order.save(update_fields=['total'])
+        order.total += sum([f.value for f in fees])
+        if simulate:
+            order.fees = fees
+            order.positions = pos_map.values()
+            return order  # ignore payments
+        else:
+            order.save(update_fields=['total'])
 
         if order.total == Decimal('0.00') and validated_data.get('status') == Order.STATUS_PAID and not payment_provider:
             payment_provider = 'free'

src/pretix/api/serializers/organizer.py

@@ -1,7 +1,7 @@
 from decimal import Decimal
 
 from django.db.models import Q
-from django.utils.translation import get_language, ugettext_lazy as _
+from django.utils.translation import get_language, gettext_lazy as _
 from rest_framework import serializers
 from rest_framework.exceptions import ValidationError
 
@@ -55,7 +55,7 @@ class GiftCardSerializer(I18nAwareModelSerializer):
 
     class Meta:
         model = GiftCard
-        fields = ('id', 'secret', 'issuance', 'value', 'currency', 'testmode')
+        fields = ('id', 'secret', 'issuance', 'value', 'currency', 'testmode', 'expires', 'conditions')
 
 
 class EventSlugField(serializers.SlugRelatedField):

src/pretix/api/views/oauth.py

@@ -2,7 +2,7 @@ import logging
 
 from django import forms
 from django.conf import settings
-from django.utils.translation import ugettext as _
+from django.utils.translation import gettext as _
 from oauth2_provider.exceptions import OAuthToolkitError
 from oauth2_provider.forms import AllowForm
 from oauth2_provider.views import (

src/pretix/api/views/order.py

@@ -9,7 +9,7 @@ from django.db.models.functions import Coalesce, Concat
 from django.http import FileResponse, HttpResponse
 from django.shortcuts import get_object_or_404
 from django.utils.timezone import make_aware, now
-from django.utils.translation import ugettext as _
+from django.utils.translation import gettext as _
 from django_filters.rest_framework import DjangoFilterBackend, FilterSet
 from django_scopes import scopes_disabled
 from rest_framework import mixins, serializers, status, viewsets
@@ -44,7 +44,7 @@ from pretix.base.services.mail import SendMailException
 from pretix.base.services.orders import (
     OrderChangeManager, OrderError, _order_placed_email,
     _order_placed_email_attendee, approve_order, cancel_order, deny_order,
-    extend_order, mark_order_expired, mark_order_refunded,
+    extend_order, mark_order_expired, mark_order_refunded, reactivate_order,
 )
 from pretix.base.services.pricing import get_price
 from pretix.base.services.tickets import generate
@@ -261,6 +261,29 @@ class OrderViewSet(viewsets.ModelViewSet):
             )
         return self.retrieve(request, [], **kwargs)
 
+    @action(detail=True, methods=['POST'])
+    def reactivate(self, request, **kwargs):
+
+        order = self.get_object()
+        if order.status != Order.STATUS_CANCELED:
+            return Response(
+                {'detail': 'The order is not allowed to be reactivated.'},
+                status=status.HTTP_400_BAD_REQUEST
+            )
+
+        try:
+            reactivate_order(
+                order,
+                user=request.user if request.user.is_authenticated else None,
+                auth=request.auth if isinstance(request.auth, (Device, TeamAPIToken, OAuthAccessToken)) else None,
+            )
+        except OrderError as e:
+            return Response(
+                {'detail': str(e)},
+                status=status.HTTP_400_BAD_REQUEST
+            )
+        return self.retrieve(request, [], **kwargs)
+
     @action(detail=True, methods=['POST'])
     def approve(self, request, **kwargs):
         send_mail = request.data.get('send_email', True)
@@ -466,6 +489,9 @@ class OrderViewSet(viewsets.ModelViewSet):
             send_mail = serializer._send_mail
             order = serializer.instance
             serializer = OrderSerializer(order, context=serializer.context)
+            if not order.pk:
+                # Simulation
+                return Response(serializer.data, status=status.HTTP_201_CREATED)
 
             order.log_action(
                 'pretix.event.order.placed',
@@ -1078,11 +1104,14 @@ class RefundViewSet(CreateModelMixin, viewsets.ReadOnlyModelViewSet):
                 auth=request.auth
             )
             if mark_refunded:
-                mark_order_refunded(
-                    r.order,
-                    user=request.user if request.user.is_authenticated else None,
-                    auth=(request.auth if request.auth else None),
-                )
+                try:
+                    mark_order_refunded(
+                        r.order,
+                        user=request.user if request.user.is_authenticated else None,
+                        auth=(request.auth if request.auth else None),
+                    )
+                except OrderError as e:
+                    raise ValidationError(str(e))
             elif mark_pending:
                 if r.order.status == Order.STATUS_PAID and r.order.pending_sum > 0:
                     r.order.status = Order.STATUS_PENDING

src/pretix/api/views/organizer.py

@@ -1,8 +1,11 @@
 from decimal import Decimal
 
+import django_filters
 from django.db import transaction
 from django.shortcuts import get_object_or_404
 from django.utils.functional import cached_property
+from django_filters.rest_framework import DjangoFilterBackend, FilterSet
+from django_scopes import scopes_disabled
 from rest_framework import filters, serializers, status, viewsets
 from rest_framework.decorators import action
 from rest_framework.exceptions import MethodNotAllowed, PermissionDenied
@@ -55,7 +58,7 @@ class SeatingPlanViewSet(viewsets.ModelViewSet):
     write_permission = 'can_change_organizer_settings'
 
     def get_queryset(self):
-        return self.request.organizer.seating_plans.all()
+        return self.request.organizer.seating_plans.order_by('name')
 
     def get_serializer_context(self):
         ctx = super().get_serializer_context()
@@ -98,14 +101,29 @@ class SeatingPlanViewSet(viewsets.ModelViewSet):
         instance.delete()
 
 
+with scopes_disabled():
+    class GiftCardFilter(FilterSet):
+        secret = django_filters.CharFilter(field_name='secret', lookup_expr='iexact')
+
+        class Meta:
+            model = GiftCard
+            fields = ['secret', 'testmode']
+
+
 class GiftCardViewSet(viewsets.ModelViewSet):
     serializer_class = GiftCardSerializer
     queryset = GiftCard.objects.none()
     permission = 'can_manage_gift_cards'
     write_permission = 'can_manage_gift_cards'
+    filter_backends = (DjangoFilterBackend,)
+    filterset_class = GiftCardFilter
 
     def get_queryset(self):
-        return self.request.organizer.issued_gift_cards.all()
+        if self.request.GET.get('include_accepted') == 'true':
+            qs = self.request.organizer.accepted_gift_cards
+        else:
+            qs = self.request.organizer.issued_gift_cards.all()
+        return qs
 
     def get_serializer_context(self):
         ctx = super().get_serializer_context()
@@ -126,6 +144,8 @@ class GiftCardViewSet(viewsets.ModelViewSet):
 
     @transaction.atomic()
     def perform_update(self, serializer):
+        if 'include_accepted' in self.request.GET:
+            raise PermissionDenied("Accepted gift cards cannot be updated, use transact instead.")
         GiftCard.objects.select_for_update().get(pk=self.get_object().pk)
         old_value = serializer.instance.value
         value = serializer.validated_data.pop('value')
@@ -148,16 +168,19 @@ class GiftCardViewSet(viewsets.ModelViewSet):
         value = serializers.DecimalField(max_digits=10, decimal_places=2).to_internal_value(
             request.data.get('value')
         )
+        text = serializers.CharField(allow_blank=True, allow_null=True).to_internal_value(
+            request.data.get('text', '')
+        )
         if gc.value + value < Decimal('0.00'):
             return Response({
                 'value': ['The gift card does not have sufficient credit for this operation.']
             }, status=status.HTTP_409_CONFLICT)
-        gc.transactions.create(value=value)
+        gc.transactions.create(value=value, text=text)
         gc.log_action(
             'pretix.giftcards.transaction.manual',
             user=self.request.user,
             auth=self.request.auth,
-            data={'value': value}
+            data={'value': value, 'text': text}
         )
         return Response(GiftCardSerializer(gc).data, status=status.HTTP_200_OK)
 
@@ -172,7 +195,7 @@ class TeamViewSet(viewsets.ModelViewSet):
     write_permission = 'can_change_teams'
 
     def get_queryset(self):
-        return self.request.organizer.teams.all()
+        return self.request.organizer.teams.order_by('pk')
 
     def get_serializer_context(self):
         ctx = super().get_serializer_context()
@@ -245,7 +268,7 @@ class TeamInviteViewSet(CreateModelMixin, DestroyModelMixin, viewsets.ReadOnlyMo
         return get_object_or_404(self.request.organizer.teams, pk=self.kwargs.get('team'))
 
     def get_queryset(self):
-        return self.team.invites.all()
+        return self.team.invites.order_by('email')
 
     def get_serializer_context(self):
         ctx = super().get_serializer_context()
@@ -282,7 +305,7 @@ class TeamAPITokenViewSet(CreateModelMixin, DestroyModelMixin, viewsets.ReadOnly
         return get_object_or_404(self.request.organizer.teams, pk=self.kwargs.get('team'))
 
     def get_queryset(self):
-        return self.team.tokens.all()
+        return self.team.tokens.order_by('name')
 
     def get_serializer_context(self):
         ctx = super().get_serializer_context()

src/pretix/api/webhooks.py

@@ -7,7 +7,7 @@ import requests
 from celery.exceptions import MaxRetriesExceededError
 from django.db.models import Exists, OuterRef, Q
 from django.dispatch import receiver
-from django.utils.translation import ugettext_lazy as _
+from django.utils.translation import gettext_lazy as _
 from django_scopes import scope, scopes_disabled
 from requests import RequestException
 
@@ -125,6 +125,10 @@ def register_default_webhook_events(sender, **kwargs):
             'pretix.event.order.canceled',
             _('Order canceled'),
         ),
+        ParametrizedOrderWebhookEvent(
+            'pretix.event.order.reactivated',
+            _('Order reactivated'),
+        ),
         ParametrizedOrderWebhookEvent(
             'pretix.event.order.expired',
             _('Order expired'),

src/pretix/base/auth.py

@@ -85,6 +85,16 @@ class BaseAuthBackend:
         """
         return
 
+    def get_next_url(self, request):
+        """
+        This method will be called after a successful login to determine the next URL. Pretix in general uses the
+        ``'next'`` query parameter. However, external authentication methods could use custom attributes with hardcoded
+        names for security purposes. For example, OAuth uses ``'state'`` for keeping track of application state.
+        """
+        if "next" in request.GET:
+            return request.GET.get("next")
+        return None
+
 
 class NativeAuthBackend(BaseAuthBackend):
     identifier = 'native'

src/pretix/base/channels.py

@@ -2,7 +2,7 @@ import logging
 from collections import OrderedDict
 
 from django.dispatch import receiver
-from django.utils.translation import ugettext_lazy as _
+from django.utils.translation import gettext_lazy as _
 
 from pretix.base.signals import register_sales_channels
 

src/pretix/base/email.py

@@ -9,7 +9,7 @@ from django.core.mail.backends.smtp import EmailBackend
 from django.dispatch import receiver
 from django.template.loader import get_template
 from django.utils.timezone import now
-from django.utils.translation import get_language, ugettext_lazy as _
+from django.utils.translation import get_language, gettext_lazy as _
 from inlinestyler.utils import inline_css
 
 from pretix.base.i18n import LazyCurrencyNumber, LazyDate, LazyNumber
@@ -267,6 +267,10 @@ def base_placeholders(sender, **kwargs):
         SimpleFunctionalMailTextPlaceholder(
             'event', ['event'], lambda event: event.name, lambda event: event.name
         ),
+        SimpleFunctionalMailTextPlaceholder(
+            'event', ['event_or_subevent'], lambda event_or_subevent: event_or_subevent.name,
+            lambda event_or_subevent: event_or_subevent.name
+        ),
         SimpleFunctionalMailTextPlaceholder(
             'event_slug', ['event'], lambda event: event.slug, lambda event: event.slug
         ),
@@ -279,6 +283,11 @@ def base_placeholders(sender, **kwargs):
         SimpleFunctionalMailTextPlaceholder(
             'currency', ['event'], lambda event: event.currency, lambda event: event.currency
         ),
+        SimpleFunctionalMailTextPlaceholder(
+            'refund_amount', ['event_or_subevent', 'refund_amount'],
+            lambda event_or_subevent, refund_amount: LazyCurrencyNumber(refund_amount, event_or_subevent.currency),
+            lambda event_or_subevent: LazyCurrencyNumber(Decimal('42.23'), event_or_subevent.currency)
+        ),
         SimpleFunctionalMailTextPlaceholder(
             'total_with_currency', ['event', 'order'], lambda event, order: LazyCurrencyNumber(order.total,
                                                                                                event.currency),

src/pretix/base/exporter.py

@@ -7,7 +7,7 @@ from typing import Tuple
 from defusedcsv import csv
 from django import forms
 from django.utils.formats import localize
-from django.utils.translation import ugettext, ugettext_lazy as _
+from django.utils.translation import gettext, gettext_lazy as _
 from openpyxl import Workbook
 from openpyxl.cell.cell import KNOWN_TYPES
 
@@ -180,9 +180,9 @@ class MultiSheetListExporter(ListExporter):
         ]
         for s, l in self.sheets:
             choices += [
-                (s + ':default', str(l) + ' – ' + ugettext('CSV (with commas)')),
-                (s + ':excel', str(l) + ' – ' + ugettext('CSV (Excel-style)')),
-                (s + ':semicolon', str(l) + ' – ' + ugettext('CSV (with semicolons)')),
+                (s + ':default', str(l) + ' – ' + gettext('CSV (with commas)')),
+                (s + ':excel', str(l) + ' – ' + gettext('CSV (Excel-style)')),
+                (s + ':semicolon', str(l) + ' – ' + gettext('CSV (with semicolons)')),
             ]
         ff = OrderedDict(
             [

src/pretix/base/exporters/answers.py

@@ -5,7 +5,7 @@ from zipfile import ZipFile
 
 from django import forms
 from django.dispatch import receiver
-from django.utils.translation import ugettext_lazy as _
+from django.utils.translation import gettext_lazy as _
 
 from pretix.base.models import QuestionAnswer
 

src/pretix/base/exporters/dekodi.py

@@ -6,7 +6,7 @@ import dateutil
 from django import forms
 from django.core.serializers.json import DjangoJSONEncoder
 from django.dispatch import receiver
-from django.utils.translation import ugettext, ugettext_lazy
+from django.utils.translation import gettext, gettext_lazy
 
 from pretix.base.i18n import language
 from pretix.base.models import Invoice, OrderPayment
@@ -79,7 +79,7 @@ class DekodiNREIExporter(BaseExporter):
                     payments.append({
                         'PTID': '5',
                         'PTN': 'Lastschrift',
-                        'PTNo4': ugettext('Event ticket {event}-{code}').format(
+                        'PTNo4': gettext('Event ticket {event}-{code}').format(
                             event=self.event.slug.upper(),
                             code=invoice.order.code
                         ),
@@ -199,19 +199,19 @@ class DekodiNREIExporter(BaseExporter):
             [
                 ('date_from',
                  forms.DateField(
-                     label=ugettext_lazy('Start date'),
+                     label=gettext_lazy('Start date'),
                      widget=forms.DateInput(attrs={'class': 'datepickerfield'}),
                      required=False,
-                     help_text=ugettext_lazy('Only include invoices issued on or after this date. Note that the invoice date does '
-                                             'not always correspond to the order or payment date.')
+                     help_text=gettext_lazy('Only include invoices issued on or after this date. Note that the invoice date does '
+                                            'not always correspond to the order or payment date.')
                  )),
                 ('date_to',
                  forms.DateField(
-                     label=ugettext_lazy('End date'),
+                     label=gettext_lazy('End date'),
                      widget=forms.DateInput(attrs={'class': 'datepickerfield'}),
                      required=False,
-                     help_text=ugettext_lazy('Only include invoices issued on or before this date. Note that the invoice date '
-                                             'does not always correspond to the order or payment date.')
+                     help_text=gettext_lazy('Only include invoices issued on or before this date. Note that the invoice date '
+                                            'does not always correspond to the order or payment date.')
                  )),
             ]
         )

src/pretix/base/exporters/invoices.py

@@ -7,7 +7,7 @@ import dateutil.parser
 from django import forms
 from django.db.models import Exists, OuterRef, Q
 from django.dispatch import receiver
-from django.utils.translation import ugettext_lazy as _
+from django.utils.translation import gettext_lazy as _
 
 from pretix.base.models import OrderPayment
 

src/pretix/base/exporters/mail.py

@@ -2,7 +2,7 @@ from collections import OrderedDict
 
 from django import forms
 from django.dispatch import receiver
-from django.utils.translation import ugettext_lazy as _
+from django.utils.translation import gettext_lazy as _
 
 from pretix.base.models import OrderPosition
 

src/pretix/base/exporters/orderlist.py

@@ -8,10 +8,10 @@ from django.db.models import (
 )
 from django.dispatch import receiver
 from django.utils.formats import date_format
-from django.utils.translation import pgettext, ugettext as _, ugettext_lazy
+from django.utils.translation import gettext as _, gettext_lazy, pgettext
 
 from pretix.base.models import (
-    InvoiceAddress, InvoiceLine, Order, OrderPosition, Question,
+    GiftCard, InvoiceAddress, InvoiceLine, Order, OrderPosition, Question,
 )
 from pretix.base.models.orders import OrderFee, OrderPayment, OrderRefund
 from pretix.base.settings import PERSON_NAME_SCHEMES
@@ -22,7 +22,7 @@ from ..signals import register_data_exporters
 
 class OrderListExporter(MultiSheetListExporter):
     identifier = 'orderlist'
-    verbose_name = ugettext_lazy('Order data')
+    verbose_name = gettext_lazy('Order data')
 
     @property
     def sheets(self):
@@ -305,6 +305,12 @@ class OrderListExporter(MultiSheetListExporter):
                 headers.append(_('Attendee name') + ': ' + str(label))
         headers += [
             _('Attendee email'),
+            _('Company'),
+            _('Address'),
+            _('ZIP code'),
+            _('City'),
+            _('Country'),
+            pgettext('address', 'State'),
             _('Voucher'),
             _('Pseudonymization ID'),
         ]
@@ -364,6 +370,12 @@ class OrderListExporter(MultiSheetListExporter):
                     )
             row += [
                 op.attendee_email,
+                op.company or '',
+                op.street or '',
+                op.zipcode or '',
+                op.city or '',
+                op.country if op.country else '',
+                op.state or '',
                 op.voucher.code if op.voucher else '',
                 op.pseudonymization_id,
             ]
@@ -414,7 +426,7 @@ class OrderListExporter(MultiSheetListExporter):
 
 class PaymentListExporter(ListExporter):
     identifier = 'paymentlist'
-    verbose_name = ugettext_lazy('Order payments and refunds')
+    verbose_name = gettext_lazy('Order payments and refunds')
 
     @property
     def additional_form_fields(self):
@@ -485,7 +497,7 @@ class PaymentListExporter(ListExporter):
 
 class QuotaListExporter(ListExporter):
     identifier = 'quotalist'
-    verbose_name = ugettext_lazy('Quota availabilities')
+    verbose_name = gettext_lazy('Quota availabilities')
 
     def iterate_list(self, form_data):
         headers = [
@@ -514,7 +526,7 @@ class QuotaListExporter(ListExporter):
 
 class InvoiceDataExporter(MultiSheetListExporter):
     identifier = 'invoicedata'
-    verbose_name = ugettext_lazy('Invoice data')
+    verbose_name = gettext_lazy('Invoice data')
 
     @property
     def sheets(self):
@@ -698,6 +710,45 @@ class InvoiceDataExporter(MultiSheetListExporter):
         return '{}_invoices'.format(self.event.slug)
 
 
+class GiftcardRedemptionListExporter(ListExporter):
+    identifier = 'giftcardredemptionlist'
+    verbose_name = gettext_lazy('Gift card redemptions')
+
+    def iterate_list(self, form_data):
+        tz = pytz.timezone(self.event.settings.timezone)
+
+        payments = OrderPayment.objects.filter(
+            order__event=self.event,
+            provider='giftcard'
+        ).order_by('created')
+        refunds = OrderRefund.objects.filter(
+            order__event=self.event,
+            provider='giftcard'
+        ).order_by('created')
+
+        objs = sorted(list(payments) + list(refunds), key=lambda o: (o.order.code, o.created))
+
+        headers = [
+            _('Order'), _('Payment ID'), _('Date'), _('Gift card code'), _('Amount'), _('Issuer')
+        ]
+        yield headers
+
+        for obj in objs:
+            gc = GiftCard.objects.get(pk=obj.info_data.get('gift_card'))
+            row = [
+                obj.order.code,
+                obj.full_id,
+                obj.created.astimezone(tz).date().strftime('%Y-%m-%d'),
+                gc.secret,
+                obj.amount * (-1 if isinstance(obj, OrderRefund) else 1),
+                gc.issuer
+            ]
+            yield row
+
+    def get_filename(self):
+        return '{}_giftcardredemptions'.format(self.event.slug)
+
+
 @receiver(register_data_exporters, dispatch_uid="exporter_orderlist")
 def register_orderlist_exporter(sender, **kwargs):
     return OrderListExporter
@@ -716,3 +767,8 @@ def register_quotalist_exporter(sender, **kwargs):
 @receiver(register_data_exporters, dispatch_uid="exporter_invoicedata")
 def register_invoicedata_exporter(sender, **kwargs):
     return InvoiceDataExporter
+
+
+@receiver(register_data_exporters, dispatch_uid="exporter_giftcardredemptionlist")
+def register_giftcardredemptionlist_exporter(sender, **kwargs):
+    return GiftcardRedemptionListExporter

src/pretix/base/forms/__init__.py

@@ -3,7 +3,6 @@ import logging
 import i18nfield.forms
 from django import forms
 from django.forms.models import ModelFormMetaclass
-from django.utils import six
 from django.utils.crypto import get_random_string
 from formtools.wizard.views import SessionWizardView
 from hierarkey.forms import HierarkeyForm
@@ -25,7 +24,7 @@ class BaseI18nModelForm(i18nfield.forms.BaseI18nModelForm):
         super().__init__(*args, **kwargs)
 
 
-class I18nModelForm(six.with_metaclass(ModelFormMetaclass, BaseI18nModelForm)):
+class I18nModelForm(BaseI18nModelForm, metaclass=ModelFormMetaclass):
     pass
 
 

src/pretix/base/forms/auth.py

@@ -3,9 +3,10 @@ from django.conf import settings
 from django.contrib.auth.password_validation import (
     password_validators_help_texts, validate_password,
 )
-from django.utils.translation import ugettext_lazy as _
+from django.utils.translation import gettext_lazy as _
 
 from pretix.base.models import User
+from pretix.helpers.dicts import move_to_end
 
 
 class LoginForm(forms.Form):
@@ -36,7 +37,7 @@ class LoginForm(forms.Form):
         if not settings.PRETIX_LONG_SESSIONS or backend.url:
             del self.fields['keep_logged_in']
         else:
-            self.fields.move_to_end('keep_logged_in')
+            move_to_end(self.fields, 'keep_logged_in')
 
     def clean(self):
         if all(k in self.cleaned_data for k, f in self.fields.items() if f.required):

src/pretix/base/forms/questions.py

@@ -18,7 +18,7 @@ from django.forms import Select
 from django.utils.html import escape
 from django.utils.safestring import mark_safe
 from django.utils.translation import (
-    get_language, pgettext_lazy, ugettext_lazy as _,
+    get_language, gettext_lazy as _, pgettext_lazy,
 )
 from django_countries import countries
 from django_countries.fields import Country, CountryField
@@ -41,6 +41,7 @@ from pretix.base.settings import (
 )
 from pretix.base.templatetags.rich_text import rich_text
 from pretix.control.forms import SplitDateTimeField
+from pretix.helpers.countries import CachedCountries
 from pretix.helpers.escapejson import escapejson_attr
 from pretix.helpers.i18n import get_format_without_seconds
 from pretix.presale.signals import question_form_fields
@@ -214,6 +215,10 @@ def guess_country(event):
     return country
 
 
+class QuestionCheckboxSelectMultiple(forms.CheckboxSelectMultiple):
+    option_template_name = 'pretixbase/forms/widgets/checkbox_option_with_links.html'
+
+
 class BaseQuestionsForm(forms.Form):
     """
     This form class is responsible for asking order-related questions. This includes
@@ -241,7 +246,7 @@ class BaseQuestionsForm(forms.Form):
         if item.admission and event.settings.attendee_names_asked:
             self.fields['attendee_name_parts'] = NamePartsFormField(
                 max_length=255,
-                required=event.settings.attendee_names_required,
+                required=event.settings.attendee_names_required and not self.all_optional,
                 scheme=event.settings.name_scheme,
                 titles=event.settings.name_scheme_titles,
                 label=_('Attendee name'),
@@ -249,7 +254,7 @@ class BaseQuestionsForm(forms.Form):
             )
         if item.admission and event.settings.attendee_emails_asked:
             self.fields['attendee_email'] = forms.EmailField(
-                required=event.settings.attendee_emails_required,
+                required=event.settings.attendee_emails_required and not self.all_optional,
                 label=_('Attendee email'),
                 initial=(cartpos.attendee_email if cartpos else orderpos.attendee_email),
                 widget=forms.EmailInput(
@@ -258,6 +263,75 @@ class BaseQuestionsForm(forms.Form):
                     }
                 )
             )
+        if item.admission and event.settings.attendee_company_asked:
+            self.fields['company'] = forms.CharField(
+                required=event.settings.attendee_company_required and not self.all_optional,
+                label=_('Company'),
+                initial=(cartpos.company if cartpos else orderpos.company),
+            )
+
+        if item.admission and event.settings.attendee_addresses_asked:
+            self.fields['street'] = forms.CharField(
+                required=event.settings.attendee_addresses_required and not self.all_optional,
+                label=_('Address'),
+                widget=forms.Textarea(attrs={
+                    'rows': 2,
+                    'placeholder': _('Street and Number'),
+                    'autocomplete': 'street-address'
+                }),
+                initial=(cartpos.street if cartpos else orderpos.street),
+            )
+            self.fields['zipcode'] = forms.CharField(
+                required=event.settings.attendee_addresses_required and not self.all_optional,
+                label=_('ZIP code'),
+                initial=(cartpos.zipcode if cartpos else orderpos.zipcode),
+                widget=forms.TextInput(attrs={
+                    'autocomplete': 'postal-code',
+                }),
+            )
+            self.fields['city'] = forms.CharField(
+                required=event.settings.attendee_addresses_required and not self.all_optional,
+                label=_('City'),
+                initial=(cartpos.city if cartpos else orderpos.city),
+                widget=forms.TextInput(attrs={
+                    'autocomplete': 'address-level2',
+                }),
+            )
+            country = (cartpos.country if cartpos else orderpos.country) or guess_country(event)
+            self.fields['country'] = CountryField(
+                countries=CachedCountries
+            ).formfield(
+                required=event.settings.attendee_addresses_required and not self.all_optional,
+                label=_('Country'),
+                initial=country,
+                widget=forms.Select(attrs={
+                    'autocomplete': 'country',
+                }),
+            )
+            c = [('', pgettext_lazy('address', 'Select state'))]
+            fprefix = str(self.prefix) + '-' if self.prefix is not None and self.prefix != '-' else ''
+            cc = None
+            if fprefix + 'country' in self.data:
+                cc = str(self.data[fprefix + 'country'])
+            elif country:
+                cc = str(country)
+            if cc and cc in COUNTRIES_WITH_STATE_IN_ADDRESS:
+                types, form = COUNTRIES_WITH_STATE_IN_ADDRESS[cc]
+                statelist = [s for s in pycountry.subdivisions.get(country_code=cc) if s.type in types]
+                c += sorted([(s.code[3:], s.name) for s in statelist], key=lambda s: s[1])
+            elif fprefix + 'state' in self.data:
+                self.data = self.data.copy()
+                del self.data[fprefix + 'state']
+
+            self.fields['state'] = forms.ChoiceField(
+                label=pgettext_lazy('address', 'State'),
+                required=False,
+                choices=c,
+                widget=forms.Select(attrs={
+                    'autocomplete': 'address-level1',
+                }),
+            )
+            self.fields['state'].widget.is_required = True
 
         for q in questions:
             # Do we already have an answer? Provide it as the initial value
@@ -309,12 +383,14 @@ class BaseQuestionsForm(forms.Form):
                     initial=initial.answer if initial else None,
                 )
             elif q.type == Question.TYPE_COUNTRYCODE:
-                field = CountryField().formfield(
+                field = CountryField(
+                    countries=CachedCountries
+                ).formfield(
                     label=label, required=required,
                     help_text=help_text,
                     widget=forms.Select,
                     empty_label='',
-                    initial=initial.answer if initial else None,
+                    initial=initial.answer if initial else guess_country(event),
                 )
             elif q.type == Question.TYPE_CHOICE:
                 field = forms.ModelChoiceField(
@@ -332,7 +408,7 @@ class BaseQuestionsForm(forms.Form):
                     label=label, required=required,
                     help_text=help_text,
                     to_field_name='identifier',
-                    widget=forms.CheckboxSelectMultiple,
+                    widget=QuestionCheckboxSelectMultiple,
                     initial=initial.options.all() if initial else None,
                 )
             elif q.type == Question.TYPE_FILE:
@@ -419,6 +495,10 @@ class BaseQuestionsForm(forms.Form):
     def clean(self):
         d = super().clean()
 
+        if d.get('city') and d.get('country') and str(d['country']) in COUNTRIES_WITH_STATE_IN_ADDRESS:
+            if not d.get('state'):
+                self.add_error('state', _('This field is required.'))
+
         question_cache = {f.question.pk: f.question for f in self.fields.values() if getattr(f, 'question', None)}
 
         def question_is_visible(parentid, qvals):
@@ -457,7 +537,7 @@ class BaseInvoiceAddressForm(forms.ModelForm):
     class Meta:
         model = InvoiceAddress
         fields = ('is_business', 'company', 'name_parts', 'street', 'zipcode', 'city', 'country', 'state',
-                  'vat_id', 'internal_reference', 'beneficiary')
+                  'vat_id', 'internal_reference', 'beneficiary', 'custom_field')
         widgets = {
             'is_business': BusinessBooleanRadio,
             'street': forms.Textarea(attrs={
@@ -500,6 +580,8 @@ class BaseInvoiceAddressForm(forms.ModelForm):
         if not event.settings.invoice_address_vatid:
             del self.fields['vat_id']
 
+        self.fields['country'].choices = CachedCountries()
+
         c = [('', pgettext_lazy('address', 'Select state'))]
         fprefix = self.prefix + '-' if self.prefix else ''
         cc = None
@@ -561,6 +643,11 @@ class BaseInvoiceAddressForm(forms.ModelForm):
         if not event.settings.invoice_address_beneficiary:
             del self.fields['beneficiary']
 
+        if event.settings.invoice_address_custom_field:
+            self.fields['custom_field'].label = event.settings.invoice_address_custom_field
+        else:
+            del self.fields['custom_field']
+
         for k, v in self.fields.items():
             if v.widget.attrs.get('autocomplete') or k == 'name_parts':
                 v.widget.attrs['autocomplete'] = 'section-invoice billing ' + v.widget.attrs.get('autocomplete', '')

src/pretix/base/forms/user.py

@@ -4,7 +4,7 @@ from django.contrib.auth.password_validation import (
     password_validators_help_texts, validate_password,
 )
 from django.db.models import Q
-from django.utils.translation import ugettext_lazy as _
+from django.utils.translation import gettext_lazy as _
 from pytz import common_timezones
 
 from pretix.base.models import User

src/pretix/base/forms/validators.py

@@ -2,7 +2,7 @@ import re
 
 from django.core.exceptions import ValidationError
 from django.core.validators import BaseValidator
-from django.utils.translation import ugettext_lazy as _
+from django.utils.translation import gettext_lazy as _
 from i18nfield.strings import LazyI18nString
 
 

src/pretix/base/forms/widgets.py

@@ -4,7 +4,7 @@ from django import forms
 from django.utils.formats import get_format
 from django.utils.functional import lazy
 from django.utils.timezone import now
-from django.utils.translation import ugettext_lazy as _
+from django.utils.translation import gettext_lazy as _
 
 
 class DatePickerWidget(forms.DateInput):

src/pretix/base/i18n.py

@@ -3,7 +3,7 @@ from contextlib import contextmanager
 from django.conf import settings
 from django.utils import translation
 from django.utils.formats import date_format, number_format
-from django.utils.translation import ugettext
+from django.utils.translation import gettext
 from i18nfield.fields import (  # noqa
     I18nCharField, I18nTextarea, I18nTextField, I18nTextInput,
 )
@@ -69,6 +69,6 @@ class LazyLocaleException(Exception):
 
     def __str__(self):
         if self.msgargs:
-            return ugettext(self.msg) % self.msgargs
+            return gettext(self.msg) % self.msgargs
         else:
-            return ugettext(self.msg)
+            return gettext(self.msg)

src/pretix/base/invoice.py

@@ -10,7 +10,7 @@ from django.contrib.staticfiles import finders
 from django.dispatch import receiver
 from django.utils.formats import date_format, localize
 from django.utils.translation import (
-    get_language, pgettext, ugettext, ugettext_lazy,
+    get_language, gettext, gettext_lazy, pgettext,
 )
 from PIL.Image import BICUBIC
 from reportlab.lib import pagesizes
@@ -264,7 +264,8 @@ class ClassicInvoiceRenderer(BaseReportlabInvoiceRenderer):
     invoice_to_top = 52 * mm
 
     def _draw_invoice_to(self, canvas):
-        p = Paragraph(self.invoice.address_invoice_to.strip().replace('\n', '<br />\n'), style=self.stylesheet['Normal'])
+        p = Paragraph(bleach.clean(self.invoice.address_invoice_to, tags=[]).strip().replace('\n', '<br />\n'),
+                      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)
@@ -422,7 +423,7 @@ class ClassicInvoiceRenderer(BaseReportlabInvoiceRenderer):
             canvas.saveState()
             canvas.setFont('OpenSansBd', 30)
             canvas.setFillColorRGB(32, 0, 0)
-            canvas.drawRightString(self.pagesize[0] - 20 * mm, (297 - 100) * mm, ugettext('TEST MODE'))
+            canvas.drawRightString(self.pagesize[0] - 20 * mm, (297 - 100) * mm, gettext('TEST MODE'))
             canvas.restoreState()
 
     def _on_first_page(self, canvas: Canvas, doc):
@@ -459,6 +460,12 @@ class ClassicInvoiceRenderer(BaseReportlabInvoiceRenderer):
 
     def _get_intro(self):
         story = []
+        if self.invoice.custom_field:
+            story.append(Paragraph(
+                '{}: {}'.format(self.invoice.event.settings.invoice_address_custom_field, self.invoice.custom_field),
+                self.stylesheet['Normal']
+            ))
+
         if self.invoice.internal_reference:
             story.append(Paragraph(
                 pgettext('invoice', 'Customer reference: {reference}').format(reference=self.invoice.internal_reference),
@@ -681,7 +688,7 @@ class ClassicInvoiceRenderer(BaseReportlabInvoiceRenderer):
 
 class Modern1Renderer(ClassicInvoiceRenderer):
     identifier = 'modern1'
-    verbose_name = ugettext_lazy('Modern Invoice Renderer (pretix 2.7)')
+    verbose_name = gettext_lazy('Modern Invoice Renderer (pretix 2.7)')
     bottom_margin = 16.9 * mm
     top_margin = 16.9 * mm
     right_margin = 20 * mm

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

@@ -13,11 +13,17 @@ class Command(BaseCommand):
         return parser
 
     def handle(self, *args, **options):
+        try:
+            from django_extensions.management.commands import shell_plus  # noqa
+            cmd = 'shell_plus'
+        except ImportError:
+            cmd = 'shell'
+
         parser = self.create_parser(sys.argv[0], sys.argv[1])
         flags = parser.parse_known_args(sys.argv[2:])[1]
         if "--override" in flags:
             with scopes_disabled():
-                return call_command("shell_plus", *args, **options)
+                return call_command(cmd, *args, **options)
 
         lookups = {}
         for flag in flags:
@@ -36,4 +42,4 @@ class Command(BaseCommand):
             for app_name, app_value in lookups.items()
         }
         with scope(**scope_options):
-            return call_command("shell_plus", *args, **options)
+            return call_command(cmd, *args, **options)

src/pretix/base/middleware.py

@@ -15,7 +15,9 @@ from django.utils.translation.trans_real import (
 )
 
 from pretix.base.settings import GlobalSettingsObject
-from pretix.multidomain.urlreverse import get_domain
+from pretix.multidomain.urlreverse import (
+    get_event_domain, get_organizer_domain,
+)
 
 _supported = None
 
@@ -231,7 +233,10 @@ class SecurityMiddleware(MiddlewareMixin):
                 dynamicdomain += " " + settings.SITE_URL
 
         if hasattr(request, 'organizer') and request.organizer:
-            domain = get_domain(request.organizer)
+            if hasattr(request, 'event') and request.event:
+                domain = get_event_domain(request.event, fallback=True)
+            else:
+                domain = get_organizer_domain(request.organizer)
             if domain:
                 siteurlsplit = urlsplit(settings.SITE_URL)
                 if siteurlsplit.port and siteurlsplit.port not in (80, 443):

src/pretix/base/migrations/0077_auto_20171124_1629.py

@@ -6,7 +6,7 @@ import django.core.validators
 import django.db.models.deletion
 from django.conf import settings
 from django.db import migrations, models
-from django.utils.translation import ugettext as _
+from django.utils.translation import gettext as _
 
 import pretix.base.validators
 from pretix.base.i18n import language

src/pretix/base/migrations/0077_auto_20171124_1629_squashed_0088_auto_20180328_1217.py

@@ -7,7 +7,7 @@ from django.db import migrations, models
 from django.db.models import F
 from django.db.models.functions import Concat
 from django.utils.crypto import get_random_string
-from django.utils.translation import ugettext as _
+from django.utils.translation import gettext as _
 
 import pretix.base.models.auth
 import pretix.base.validators

src/pretix/base/migrations/0108_auto_20190201_1527_squashed_0141_seat_sorting_rank.py

@@ -0,0 +1,558 @@
+# Generated by Django 3.0.4 on 2020-04-20 15:06
+
+from decimal import Decimal
+
+import django.db.models.deletion
+import jsonfallback.fields
+from django.conf import settings
+from django.core.cache import cache
+from django.db import migrations, models
+from django.db.models import Count
+
+import pretix.base.models.base
+import pretix.base.models.fields
+import pretix.base.models.orders
+
+
+def fwd(app, schema_editor):
+    Team = app.get_model('pretixbase', 'Team')
+    Team.objects.filter(can_change_organizer_settings=True).update(can_manage_gift_cards=True)
+
+
+def mail_migrator(app, schema_editor):
+    Event_SettingsStore = app.get_model('pretixbase', 'Event_SettingsStore')
+
+    for ss in Event_SettingsStore.objects.filter(
+            key__in=['mail_text_order_approved', 'mail_text_order_placed', 'mail_text_order_placed_require_approval']
+    ):
+        chgd = ss.value.replace("{date}", "{expire_date}")
+        if chgd != ss.value:
+            ss.value = chgd
+            ss.save()
+            cache.delete('hierarkey_{}_{}'.format('event', ss.object_id))
+
+
+def set_show_hidden_items(apps, schema_editor):
+    Voucher = apps.get_model('pretixbase', 'Voucher')
+    Voucher.objects.filter(quota__isnull=False).update(show_hidden_items=False)
+
+
+def make_checkins_unique(apps, se):
+    Checkin = apps.get_model('pretixbase', 'Checkin')
+    for d in Checkin.objects.order_by().values('list_id', 'position_id').annotate(c=Count('id')).filter(c__gt=1):
+        for c in Checkin.objects.filter(list_id=d['list_id'], position_id=d['position_id'])[:d['c'] - 1]:
+            c.delete()
+
+
+class Migration(migrations.Migration):
+    replaces = [('pretixbase', '0108_auto_20190201_1527'), ('pretixbase', '0109_auto_20190208_1432'),
+                ('pretixbase', '0110_auto_20190219_1245'), ('pretixbase', '0111_auto_20190219_0949'),
+                ('pretixbase', '0112_auto_20190304_1726'), ('pretixbase', '0113_auto_20190312_0942'),
+                ('pretixbase', '0114_auto_20190316_1014'), ('pretixbase', '0115_auto_20190323_2238'),
+                ('pretixbase', '0116_auto_20190402_0722'), ('pretixbase', '0117_auto_20190418_1149'),
+                ('pretixbase', '0118_auto_20190423_0839'), ('pretixbase', '0119_auto_20190509_0654'),
+                ('pretixbase', '0120_auto_20190509_0736'), ('pretixbase', '0121_order_email_known_to_work'),
+                ('pretixbase', '0122_orderposition_web_secret'), ('pretixbase', '0123_auto_20190530_1035'),
+                ('pretixbase', '0124_seat_seat_guid'), ('pretixbase', '0125_voucher_show_hidden_items'),
+                ('pretixbase', '0126_item_show_quota_left'), ('pretixbase', '0127_auto_20190711_0705'),
+                ('pretixbase', '0128_auto_20190715_1510'), ('pretixbase', '0129_auto_20190724_1548'),
+                ('pretixbase', '0130_auto_20190729_1311'), ('pretixbase', '0131_auto_20190729_1422'),
+                ('pretixbase', '0132_auto_20190808_1253'), ('pretixbase', '0133_auto_20190830_1513'),
+                ('pretixbase', '0134_auto_20190909_1042'), ('pretixbase', '0135_auto_20191007_0803'),
+                ('pretixbase', '0136_auto_20190918_1742'), ('pretixbase', '0137_auto_20191015_1141'),
+                ('pretixbase', '0138_auto_20191017_1151'), ('pretixbase', '0139_auto_20191019_1317'),
+                ('pretixbase', '0140_voucher_seat'), ('pretixbase', '0141_seat_sorting_rank')]
+
+    dependencies = [
+        ('pretixbase', '0107_auto_20190129_1337'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='item',
+            name='generate_tickets',
+            field=models.NullBooleanField(verbose_name='Allow ticket download'),
+        ),
+        migrations.AddField(
+            model_name='invoiceline',
+            name='event_date_from',
+            field=models.DateTimeField(null=True),
+        ),
+        migrations.AddField(
+            model_name='invoiceline',
+            name='subevent',
+            field=models.ForeignKey(blank=True, null=True, on_delete=django.db.models.deletion.PROTECT,
+                                    to='pretixbase.SubEvent'),
+        ),
+        migrations.AlterField(
+            model_name='event',
+            name='plugins',
+            field=models.TextField(blank=True, default='', verbose_name='Plugins'),
+            preserve_default=False,
+        ),
+        migrations.AddField(
+            model_name='order',
+            name='testmode',
+            field=models.BooleanField(default=False),
+        ),
+        migrations.AddField(
+            model_name='event',
+            name='testmode',
+            field=models.BooleanField(default=False),
+        ),
+        migrations.RunPython(
+            code=make_checkins_unique,
+            reverse_code=django.db.migrations.operations.special.RunPython.noop,
+        ),
+        migrations.AlterUniqueTogether(
+            name='checkin',
+            unique_together={('list', 'position')},
+        ),
+        migrations.AddField(
+            model_name='question',
+            name='dependency_question',
+            field=models.ForeignKey(blank=True, null=True, on_delete=django.db.models.deletion.SET_NULL,
+                                    related_name='dependent_questions', to='pretixbase.Question'),
+        ),
+        migrations.AddField(
+            model_name='question',
+            name='dependency_value',
+            field=models.TextField(blank=True, null=True),
+        ),
+        migrations.AddField(
+            model_name='cartposition',
+            name='is_bundled',
+            field=models.BooleanField(default=False),
+        ),
+        migrations.AlterField(
+            model_name='cartposition',
+            name='addon_to',
+            field=models.ForeignKey(blank=True, null=True, on_delete=django.db.models.deletion.PROTECT,
+                                    related_name='addons', to='pretixbase.CartPosition'),
+        ),
+        migrations.AlterField(
+            model_name='orderposition',
+            name='addon_to',
+            field=models.ForeignKey(blank=True, null=True, on_delete=django.db.models.deletion.PROTECT,
+                                    related_name='addons', to='pretixbase.OrderPosition'),
+        ),
+        migrations.AddField(
+            model_name='item',
+            name='require_bundling',
+            field=models.BooleanField(default=False,
+                                      help_text='If this option is set, the product will only be sold as part of bundle products.',
+                                      verbose_name='Only sell this product as part of a bundle'),
+        ),
+        migrations.CreateModel(
+            name='ItemBundle',
+            fields=[
+                ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('count', models.PositiveIntegerField(default=1, verbose_name='Number')),
+                ('designated_price', models.DecimalField(blank=True, decimal_places=2, default=Decimal('0.00'),
+                                                         help_text="If set, it will be shown that this bundled item is responsible for the given value of the total gross price. This might be important in cases of mixed taxation, but can be kept blank otherwise. This value will NOT be added to the base item's price.",
+                                                         max_digits=10, verbose_name='Designated price part')),
+                ('base_item', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, related_name='bundles',
+                                                to='pretixbase.Item')),
+                ('bundled_item',
+                 models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, related_name='bundled_with',
+                                   to='pretixbase.Item', verbose_name='Bundled item')),
+                ('bundled_variation',
+                 models.ForeignKey(blank=True, null=True, on_delete=django.db.models.deletion.CASCADE,
+                                   related_name='bundled_with', to='pretixbase.ItemVariation',
+                                   verbose_name='Bundled variation')),
+            ],
+        ),
+        migrations.AddField(
+            model_name='device',
+            name='revoked',
+            field=models.BooleanField(default=False),
+        ),
+        migrations.AddField(
+            model_name='itemvariation',
+            name='original_price',
+            field=models.DecimalField(blank=True, decimal_places=2,
+                                      help_text='If set, this will be displayed next to the current price to show that the current price is a discounted one. This is just a cosmetic setting and will not actually impact pricing.',
+                                      max_digits=7, null=True, verbose_name='Original price'),
+        ),
+        migrations.AddField(
+            model_name='subevent',
+            name='is_public',
+            field=models.BooleanField(default=True,
+                                      help_text='If selected, this event will show up publicly on the list of dates for your event.',
+                                      verbose_name='Show in lists'),
+        ),
+        migrations.AddField(
+            model_name='question',
+            name='hidden',
+            field=models.BooleanField(default=False, help_text='This question will only show up in the backend.',
+                                      verbose_name='Hidden question'),
+        ),
+        migrations.AlterField(
+            model_name='cartposition',
+            name='attendee_name_parts',
+            field=jsonfallback.fields.FallbackJSONField(default=dict),
+        ),
+        migrations.AlterField(
+            model_name='cartposition',
+            name='subevent',
+            field=models.ForeignKey(null=True, on_delete=django.db.models.deletion.PROTECT, to='pretixbase.SubEvent'),
+        ),
+        migrations.AlterField(
+            model_name='cartposition',
+            name='voucher',
+            field=models.ForeignKey(null=True, on_delete=django.db.models.deletion.PROTECT, to='pretixbase.Voucher'),
+        ),
+        migrations.AlterField(
+            model_name='event',
+            name='is_public',
+            field=models.BooleanField(default=True),
+        ),
+        migrations.AlterField(
+            model_name='invoiceaddress',
+            name='name_parts',
+            field=jsonfallback.fields.FallbackJSONField(default=dict),
+        ),
+        migrations.AlterField(
+            model_name='item',
+            name='sales_channels',
+            field=pretix.base.models.fields.MultiStringField(default=['web']),
+        ),
+        migrations.AlterField(
+            model_name='order',
+            name='sales_channel',
+            field=models.CharField(default='web', max_length=190),
+        ),
+        migrations.AlterField(
+            model_name='orderposition',
+            name='attendee_name_parts',
+            field=jsonfallback.fields.FallbackJSONField(default=dict),
+        ),
+        migrations.AlterField(
+            model_name='orderposition',
+            name='subevent',
+            field=models.ForeignKey(null=True, on_delete=django.db.models.deletion.PROTECT, to='pretixbase.SubEvent'),
+        ),
+        migrations.AlterField(
+            model_name='orderposition',
+            name='voucher',
+            field=models.ForeignKey(null=True, on_delete=django.db.models.deletion.PROTECT, to='pretixbase.Voucher'),
+        ),
+        migrations.AlterField(
+            model_name='staffsessionauditlog',
+            name='method',
+            field=models.CharField(max_length=255),
+        ),
+        migrations.AlterField(
+            model_name='user',
+            name='email',
+            field=models.EmailField(db_index=True, max_length=190, null=True, unique=True),
+        ),
+        migrations.AddField(
+            model_name='order',
+            name='email_known_to_work',
+            field=models.BooleanField(default=False),
+        ),
+        migrations.AddField(
+            model_name='orderposition',
+            name='web_secret',
+            field=models.CharField(db_index=True, default=pretix.base.models.orders.generate_secret, max_length=32),
+        ),
+        migrations.CreateModel(
+            name='SeatingPlan',
+            fields=[
+                ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False)),
+                ('name', models.CharField(max_length=190)),
+                ('layout', models.TextField()),
+                ('organizer',
+                 models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, related_name='seating_plans',
+                                   to='pretixbase.Organizer')),
+            ],
+            options={
+                'abstract': False,
+            },
+            bases=(models.Model, pretix.base.models.base.LoggingMixin),
+        ),
+        migrations.CreateModel(
+            name='SeatCategoryMapping',
+            fields=[
+                ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False)),
+                ('layout_category', models.CharField(max_length=190)),
+                ('event',
+                 models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, related_name='seat_category_mappings',
+                                   to='pretixbase.Event')),
+                ('product',
+                 models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, related_name='seat_category_mappings',
+                                   to='pretixbase.Item')),
+                ('subevent', models.ForeignKey(null=True, on_delete=django.db.models.deletion.CASCADE,
+                                               related_name='seat_category_mappings', to='pretixbase.SubEvent')),
+            ],
+        ),
+        migrations.CreateModel(
+            name='Seat',
+            fields=[
+                ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False)),
+                ('name', models.CharField(max_length=190)),
+                ('blocked', models.BooleanField(default=False)),
+                ('event', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, related_name='seats',
+                                            to='pretixbase.Event')),
+                ('product',
+                 models.ForeignKey(null=True, on_delete=django.db.models.deletion.CASCADE, related_name='seats',
+                                   to='pretixbase.Item')),
+                ('subevent',
+                 models.ForeignKey(null=True, on_delete=django.db.models.deletion.CASCADE, related_name='seats',
+                                   to='pretixbase.SubEvent')),
+                ('seat_guid', models.CharField(db_index=True, default=None, max_length=190)),
+            ],
+        ),
+        migrations.AddField(
+            model_name='cartposition',
+            name='seat',
+            field=models.ForeignKey(null=True, on_delete=django.db.models.deletion.PROTECT, to='pretixbase.Seat'),
+        ),
+        migrations.AddField(
+            model_name='event',
+            name='seating_plan',
+            field=models.ForeignKey(null=True, on_delete=django.db.models.deletion.PROTECT, related_name='events',
+                                    to='pretixbase.SeatingPlan'),
+        ),
+        migrations.AddField(
+            model_name='orderposition',
+            name='seat',
+            field=models.ForeignKey(null=True, on_delete=django.db.models.deletion.PROTECT, to='pretixbase.Seat'),
+        ),
+        migrations.AddField(
+            model_name='subevent',
+            name='seating_plan',
+            field=models.ForeignKey(null=True, on_delete=django.db.models.deletion.PROTECT, related_name='subevents',
+                                    to='pretixbase.SeatingPlan'),
+        ),
+        migrations.AddField(
+            model_name='voucher',
+            name='show_hidden_items',
+            field=models.BooleanField(default=True),
+        ),
+        migrations.RunPython(
+            code=set_show_hidden_items,
+            reverse_code=django.db.migrations.operations.special.RunPython.noop,
+        ),
+        migrations.AddField(
+            model_name='item',
+            name='show_quota_left',
+            field=models.NullBooleanField(),
+        ),
+        migrations.RenameField(
+            model_name='question',
+            old_name='dependency_value',
+            new_name='dependency_values',
+        ),
+        migrations.AlterField(
+            model_name='question',
+            name='dependency_values',
+            field=pretix.base.models.fields.MultiStringField(default=['']),
+        ),
+        migrations.AddField(
+            model_name='quota',
+            name='close_when_sold_out',
+            field=models.BooleanField(default=False),
+        ),
+        migrations.AddField(
+            model_name='quota',
+            name='closed',
+            field=models.BooleanField(default=False),
+        ),
+        migrations.AddField(
+            model_name='item',
+            name='hidden_if_available',
+            field=models.ForeignKey(null=True, on_delete=django.db.models.deletion.SET_NULL, to='pretixbase.Quota'),
+        ),
+        migrations.AddField(
+            model_name='seat',
+            name='row_name',
+            field=models.CharField(default='', max_length=190),
+        ),
+        migrations.AddField(
+            model_name='seat',
+            name='seat_number',
+            field=models.CharField(default='', max_length=190),
+        ),
+        migrations.AddField(
+            model_name='seat',
+            name='zone_name',
+            field=models.CharField(default='', max_length=190),
+        ),
+        migrations.AddField(
+            model_name='item',
+            name='allow_waitinglist',
+            field=models.BooleanField(default=True),
+        ),
+        migrations.AddField(
+            model_name='invoice',
+            name='invoice_to_state',
+            field=models.CharField(max_length=190, null=True),
+        ),
+        migrations.AddField(
+            model_name='invoiceaddress',
+            name='state',
+            field=models.CharField(default='', max_length=255),
+            preserve_default=False,
+        ),
+        migrations.AddField(
+            model_name='question',
+            name='print_on_invoice',
+            field=models.BooleanField(default=False),
+        ),
+        migrations.CreateModel(
+            name='WebAuthnDevice',
+            fields=[
+                ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False)),
+                ('name', models.CharField(max_length=64)),
+                ('confirmed', models.BooleanField(default=True)),
+                ('credential_id', models.CharField(max_length=255, null=True)),
+                ('rp_id', models.CharField(max_length=255, null=True)),
+                ('icon_url', models.CharField(max_length=255, null=True)),
+                ('ukey', models.TextField(null=True)),
+                ('pub_key', models.TextField(null=True)),
+                ('sign_count', models.IntegerField(default=0)),
+                ('user', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, to=settings.AUTH_USER_MODEL)),
+            ],
+            options={
+                'abstract': False,
+            },
+        ),
+        migrations.RunPython(
+            code=mail_migrator,
+            reverse_code=django.db.migrations.operations.special.RunPython.noop,
+        ),
+        migrations.AddField(
+            model_name='checkin',
+            name='auto_checked_in',
+            field=models.BooleanField(default=False),
+        ),
+        migrations.AddField(
+            model_name='checkinlist',
+            name='auto_checkin_sales_channels',
+            field=pretix.base.models.fields.MultiStringField(default=[]),
+        ),
+        migrations.AddField(
+            model_name='user',
+            name='auth_backend',
+            field=models.CharField(default='native', max_length=255),
+        ),
+        migrations.CreateModel(
+            name='GiftCard',
+            fields=[
+                ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False)),
+                ('issuance', models.DateTimeField(auto_now_add=True)),
+                ('secret', models.CharField(db_index=True, default=pretix.base.models.giftcards.gen_giftcard_secret,
+                                            max_length=190)),
+                ('currency', models.CharField(max_length=10)),
+                ('issued_in', models.ForeignKey(null=True, on_delete=django.db.models.deletion.PROTECT,
+                                                related_name='issued_gift_cards', to='pretixbase.OrderPosition')),
+                ('issuer',
+                 models.ForeignKey(on_delete=django.db.models.deletion.PROTECT, related_name='issued_gift_cards',
+                                   to='pretixbase.Organizer')),
+                ('testmode', models.BooleanField(default=False)),
+            ],
+            options={
+                'unique_together': {('secret', 'issuer')},
+            },
+            bases=(models.Model, pretix.base.models.base.LoggingMixin),
+        ),
+        migrations.AddField(
+            model_name='item',
+            name='issue_giftcard',
+            field=models.BooleanField(default=False),
+        ),
+        migrations.AddField(
+            model_name='team',
+            name='can_manage_gift_cards',
+            field=models.BooleanField(default=False),
+        ),
+        migrations.AlterField(
+            model_name='question',
+            name='dependency_values',
+            field=pretix.base.models.fields.MultiStringField(default=[]),
+        ),
+        migrations.AlterField(
+            model_name='voucher',
+            name='item',
+            field=models.ForeignKey(null=True, on_delete=django.db.models.deletion.PROTECT, related_name='vouchers',
+                                    to='pretixbase.Item'),
+        ),
+        migrations.AlterField(
+            model_name='voucher',
+            name='quota',
+            field=models.ForeignKey(null=True, on_delete=django.db.models.deletion.PROTECT, related_name='vouchers',
+                                    to='pretixbase.Quota'),
+        ),
+        migrations.AlterField(
+            model_name='voucher',
+            name='variation',
+            field=models.ForeignKey(null=True, on_delete=django.db.models.deletion.PROTECT, related_name='vouchers',
+                                    to='pretixbase.ItemVariation'),
+        ),
+        migrations.CreateModel(
+            name='GiftCardTransaction',
+            fields=[
+                ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False)),
+                ('datetime', models.DateTimeField(auto_now_add=True)),
+                ('value', models.DecimalField(decimal_places=2, max_digits=10)),
+                ('card', models.ForeignKey(on_delete=django.db.models.deletion.PROTECT, related_name='transactions',
+                                           to='pretixbase.GiftCard')),
+                ('order', models.ForeignKey(null=True, on_delete=django.db.models.deletion.PROTECT,
+                                            related_name='gift_card_transactions', to='pretixbase.Order')),
+                ('payment', models.ForeignKey(null=True, on_delete=django.db.models.deletion.PROTECT,
+                                              related_name='gift_card_transactions', to='pretixbase.OrderPayment')),
+                ('refund', models.ForeignKey(null=True, on_delete=django.db.models.deletion.PROTECT,
+                                             related_name='gift_card_transactions', to='pretixbase.OrderRefund')),
+            ],
+            options={
+                'ordering': ('datetime',),
+            },
+        ),
+        migrations.CreateModel(
+            name='GiftCardAcceptance',
+            fields=[
+                ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False)),
+                ('collector', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE,
+                                                related_name='gift_card_issuer_acceptance', to='pretixbase.Organizer')),
+                ('issuer', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE,
+                                             related_name='gift_card_collector_acceptance', to='pretixbase.Organizer')),
+            ],
+        ),
+        migrations.RunPython(
+            code=fwd,
+            reverse_code=django.db.migrations.operations.special.RunPython.noop,
+        ),
+        migrations.AddField(
+            model_name='event',
+            name='geo_lat',
+            field=models.FloatField(null=True),
+        ),
+        migrations.AddField(
+            model_name='event',
+            name='geo_lon',
+            field=models.FloatField(null=True),
+        ),
+        migrations.AddField(
+            model_name='subevent',
+            name='geo_lat',
+            field=models.FloatField(null=True),
+        ),
+        migrations.AddField(
+            model_name='subevent',
+            name='geo_lon',
+            field=models.FloatField(null=True),
+        ),
+        migrations.AddField(
+            model_name='voucher',
+            name='seat',
+            field=models.ForeignKey(null=True, on_delete=django.db.models.deletion.PROTECT, related_name='vouchers',
+                                    to='pretixbase.Seat'),
+        ),
+        migrations.AddField(
+            model_name='seat',
+            name='sorting_rank',
+            field=models.BigIntegerField(default=0),
+        ),
+    ]

src/pretix/base/migrations/0144_invoiceaddress_custom_field.py

@@ -0,0 +1,22 @@
+# Generated by Django 2.2.9 on 2020-02-18 08:06
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+    dependencies = [
+        ('pretixbase', '0143_auto_20200217_1211'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='invoiceaddress',
+            name='custom_field',
+            field=models.CharField(max_length=255, null=True, blank=True),
+        ),
+        migrations.AddField(
+            model_name='invoice',
+            name='custom_field',
+            field=models.CharField(max_length=255, null=True),
+        ),
+    ]

src/pretix/base/migrations/0145_auto_20200210_1038.py

@@ -0,0 +1,42 @@
+# Generated by Django 2.2.8 on 2020-02-10 10:38
+
+import django.db.models.deletion
+from django.db import migrations, models
+
+import pretix.base.models.base
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('pretixbase', '0144_invoiceaddress_custom_field'),
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name='ItemMetaProperty',
+            fields=[
+                ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False)),
+                ('name', models.CharField(db_index=True, max_length=50)),
+                ('default', models.TextField()),
+                ('event', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, related_name='item_meta_properties', to='pretixbase.Event')),
+            ],
+            options={
+                'abstract': False,
+            },
+            bases=(models.Model, pretix.base.models.base.LoggingMixin),
+        ),
+        migrations.CreateModel(
+            name='ItemMetaValue',
+            fields=[
+                ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False)),
+                ('value', models.TextField()),
+                ('item', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, related_name='meta_values', to='pretixbase.Item')),
+                ('property', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, related_name='item_values', to='pretixbase.ItemMetaProperty')),
+            ],
+            options={
+                'unique_together': {('item', 'property')},
+            },
+            bases=(models.Model, pretix.base.models.base.LoggingMixin),
+        ),
+    ]

src/pretix/base/migrations/0146_giftcardtransaction_text.py

@@ -0,0 +1,18 @@
+# Generated by Django 2.2.4 on 2020-03-02 11:28
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('pretixbase', '0145_auto_20200210_1038'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='giftcardtransaction',
+            name='text',
+            field=models.TextField(null=True),
+        ),
+    ]

src/pretix/base/migrations/0147_user_session_token.py

@@ -0,0 +1,20 @@
+# Generated by Django 2.2.9 on 2020-03-21 15:12
+
+from django.db import migrations, models
+
+import pretix.base.models.auth
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('pretixbase', '0146_giftcardtransaction_text'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='user',
+            name='session_token',
+            field=models.CharField(default=pretix.base.models.auth.generate_session_token, max_length=32),
+        ),
+    ]

src/pretix/base/migrations/0148_cancellationrequest.py

@@ -0,0 +1,24 @@
+# Generated by Django 3.0.4 on 2020-03-25 10:05
+
+import django.db.models.deletion
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('pretixbase', '0147_user_session_token'),
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name='CancellationRequest',
+            fields=[
+                ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False)),
+                ('created', models.DateTimeField(auto_now_add=True)),
+                ('cancellation_fee', models.DecimalField(decimal_places=2, max_digits=10)),
+                ('refund_as_giftcard', models.BooleanField(default=False)),
+                ('order', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, related_name='cancellation_requests', to='pretixbase.Order')),
+            ],
+        ),
+    ]

src/pretix/base/migrations/0149_order_cancellation_date.py

@@ -0,0 +1,46 @@
+# Generated by Django 3.0.4 on 2020-03-25 14:40
+
+from django.db import migrations, models
+from django.db.models import Count, OuterRef, Q, Subquery
+from django.utils.timezone import now
+
+
+def fill_cancellation_date(apps, schema_editor):
+    Order = apps.get_model('pretixbase', 'Order')
+    LogEntry = apps.get_model('pretixbase', 'LogEntry')
+    OrderPosition = apps.get_model('pretixbase', 'OrderPosition')
+
+    s = OrderPosition.all.filter(
+        order=OuterRef('pk'),
+        canceled=False,
+    ).order_by().values('order').annotate(k=Count('id')).values('k')
+    for o in Order.objects.annotate(
+            pcnt=Subquery(s)
+    ).filter(
+        Q(pcnt=0) | Q(pcnt__isnull=True) | Q(status="c")
+    ).values('id').iterator():
+        le = LogEntry.objects.filter(
+            content_type__model="order",
+            object_id=o['id'],
+            action_type='pretix.event.order.canceled'
+        ).order_by('-datetime').only('datetime').first()
+        if le:
+            Order.objects.filter(pk=o['id']).update(
+                cancellation_date=le.datetime,
+                last_modified=now()
+            )
+
+
+class Migration(migrations.Migration):
+    dependencies = [
+        ('pretixbase', '0148_cancellationrequest'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='order',
+            name='cancellation_date',
+            field=models.DateTimeField(blank=True, null=True),
+        ),
+        migrations.RunPython(fill_cancellation_date, migrations.RunPython.noop)
+    ]

src/pretix/base/migrations/0150_auto_20200401_1123.py

@@ -0,0 +1,74 @@
+# Generated by Django 3.0.4 on 2020-04-01 11:24
+
+import django_countries.fields
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('pretixbase', '0149_order_cancellation_date'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='cartposition',
+            name='city',
+            field=models.CharField(max_length=255, null=True),
+        ),
+        migrations.AddField(
+            model_name='cartposition',
+            name='company',
+            field=models.CharField(max_length=255, null=True),
+        ),
+        migrations.AddField(
+            model_name='cartposition',
+            name='country',
+            field=django_countries.fields.CountryField(max_length=2, null=True),
+        ),
+        migrations.AddField(
+            model_name='cartposition',
+            name='state',
+            field=models.CharField(max_length=255, null=True),
+        ),
+        migrations.AddField(
+            model_name='cartposition',
+            name='street',
+            field=models.TextField(null=True),
+        ),
+        migrations.AddField(
+            model_name='cartposition',
+            name='zipcode',
+            field=models.CharField(max_length=30, null=True),
+        ),
+        migrations.AddField(
+            model_name='orderposition',
+            name='city',
+            field=models.CharField(max_length=255, null=True),
+        ),
+        migrations.AddField(
+            model_name='orderposition',
+            name='company',
+            field=models.CharField(max_length=255, null=True),
+        ),
+        migrations.AddField(
+            model_name='orderposition',
+            name='country',
+            field=django_countries.fields.CountryField(max_length=2, null=True),
+        ),
+        migrations.AddField(
+            model_name='orderposition',
+            name='state',
+            field=models.CharField(max_length=255, null=True),
+        ),
+        migrations.AddField(
+            model_name='orderposition',
+            name='street',
+            field=models.TextField(null=True),
+        ),
+        migrations.AddField(
+            model_name='orderposition',
+            name='zipcode',
+            field=models.CharField(max_length=30, null=True),
+        ),
+    ]

src/pretix/base/migrations/0151_auto_20200421_0737.py

@@ -0,0 +1,26 @@
+# Generated by Django 3.0.5 on 2020-04-21 07:37
+
+import django_countries.fields
+from django.db import migrations, models
+
+import pretix.helpers.countries
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('pretixbase', '0150_auto_20200401_1123'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='giftcard',
+            name='conditions',
+            field=models.TextField(null=True),
+        ),
+        migrations.AddField(
+            model_name='giftcard',
+            name='expires',
+            field=models.DateTimeField(blank=True, null=True),
+        ),
+    ]

src/pretix/base/models/__init__.py

@@ -10,9 +10,9 @@ from .event import (
 from .giftcards import GiftCard, GiftCardAcceptance, GiftCardTransaction
 from .invoices import Invoice, InvoiceLine, invoice_filename
 from .items import (
-    Item, ItemAddOn, ItemBundle, ItemCategory, ItemVariation, Question,
-    QuestionOption, Quota, SubEventItem, SubEventItemVariation,
-    itempicture_upload_to,
+    Item, ItemAddOn, ItemBundle, ItemCategory, ItemMetaProperty, ItemMetaValue,
+    ItemVariation, Question, QuestionOption, Quota, SubEventItem,
+    SubEventItemVariation, itempicture_upload_to,
 )
 from .log import LogEntry
 from .notifications import NotificationSetting

src/pretix/base/models/auth.py

@@ -12,9 +12,9 @@ from django.contrib.auth.tokens import default_token_generator
 from django.contrib.contenttypes.models import ContentType
 from django.db import models
 from django.db.models import Q
-from django.utils.crypto import get_random_string
+from django.utils.crypto import get_random_string, salted_hmac
 from django.utils.timezone import now
-from django.utils.translation import ugettext_lazy as _
+from django.utils.translation import gettext_lazy as _
 from django_otp.models import Device
 from django_scopes import scopes_disabled
 from u2flib_server.utils import (
@@ -54,6 +54,10 @@ def generate_notifications_token():
     return get_random_string(length=32)
 
 
+def generate_session_token():
+    return get_random_string(length=32)
+
+
 class SuperuserPermissionSet:
     def __contains__(self, item):
         return True
@@ -110,6 +114,7 @@ class User(AbstractBaseUser, PermissionsMixin, LoggingMixin):
     )
     notifications_token = models.CharField(max_length=255, default=generate_notifications_token)
     auth_backend = models.CharField(max_length=255, default='native')
+    session_token = models.CharField(max_length=32, default=generate_session_token)
 
     objects = UserManager()
 
@@ -382,6 +387,20 @@ class User(AbstractBaseUser, PermissionsMixin, LoggingMixin):
             self._staff_session_cache[session_key] = sess
         return self._staff_session_cache[session_key]
 
+    def get_session_auth_hash(self):
+        """
+        Return an HMAC that needs to
+        """
+        key_salt = "pretix.base.models.User.get_session_auth_hash"
+        payload = self.password
+        payload += self.email
+        payload += self.session_token
+        return salted_hmac(key_salt, payload).hexdigest()
+
+    def update_session_token(self):
+        self.session_token = generate_session_token()
+        self.save(update_fields=['session_token'])
+
 
 class StaffSession(models.Model):
     user = models.ForeignKey('User', on_delete=models.PROTECT)

src/pretix/base/models/checkin.py

@@ -1,7 +1,7 @@
 from django.db import models
 from django.db.models import Exists, OuterRef
 from django.utils.timezone import now
-from django.utils.translation import pgettext_lazy, ugettext_lazy as _
+from django.utils.translation import gettext_lazy as _, pgettext_lazy
 from django_scopes import ScopedManager
 
 from pretix.base.models import LoggedModel

src/pretix/base/models/devices.py

@@ -3,7 +3,7 @@ import string
 from django.db import models
 from django.db.models import Max
 from django.utils.crypto import get_random_string
-from django.utils.translation import ugettext_lazy as _
+from django.utils.translation import gettext_lazy as _
 from django_scopes import ScopedManager, scopes_disabled
 
 from pretix.base.models import LoggedModel
@@ -94,6 +94,7 @@ class Device(LoggedModel):
         return {
             'can_view_orders',
             'can_change_orders',
+            'can_manage_gift_cards'
         }
 
     def get_event_permission_set(self, organizer, event) -> set:

src/pretix/base/models/event.py

@@ -15,9 +15,10 @@ from django.db import models
 from django.db.models import Exists, F, OuterRef, Prefetch, Q, Subquery
 from django.template.defaultfilters import date as _date
 from django.utils.crypto import get_random_string
+from django.utils.formats import date_format
 from django.utils.functional import cached_property
 from django.utils.timezone import make_aware, now
-from django.utils.translation import ugettext_lazy as _
+from django.utils.translation import gettext_lazy as _
 from django_scopes import ScopedManager, scopes_disabled
 from i18nfield.fields import I18nCharField, I18nTextField
 
@@ -293,7 +294,7 @@ class Event(EventMixin, LoggedModel):
             "This will be used in URLs, order codes, invoice numbers, and bank transfer references."),
         validators=[
             RegexValidator(
-                regex="^[a-zA-Z0-9][a-zA-Z0-9.-]+$",
+                regex="^[a-zA-Z0-9][a-zA-Z0-9.-]*$",
                 message=_("The slug may only contain letters, numbers, dots and dashes."),
             ),
             EventSlugBanlistValidator()
@@ -370,6 +371,8 @@ class Event(EventMixin, LoggedModel):
         """
         self.settings.invoice_renderer = 'modern1'
         self.settings.invoice_include_expire_date = True
+        self.settings.ticketoutput_pdf__enabled = True
+        self.settings.ticketoutput_passbook__enabled = True
 
     @property
     def social_image(self):
@@ -385,7 +388,7 @@ class Event(EventMixin, LoggedModel):
         if img:
             return urljoin(build_absolute_uri(self, 'presale:event.index'), img)
 
-    def free_seats(self, ignore_voucher=None, sales_channel='web'):
+    def free_seats(self, ignore_voucher=None, sales_channel='web', include_blocked=False):
         from .orders import CartPosition, Order, OrderPosition
         from .vouchers import Voucher
         vqs = Voucher.objects.filter(
@@ -416,7 +419,7 @@ class Event(EventMixin, LoggedModel):
                 vqs
             )
         ).filter(has_order=False, has_cart=False, has_voucher=False)
-        if sales_channel not in self.settings.seating_allow_blocked_seats_for_channel:
+        if not (sales_channel in self.settings.seating_allow_blocked_seats_for_channel or include_blocked):
             qs = qs.filter(blocked=False)
         return qs
 
@@ -515,7 +518,7 @@ class Event(EventMixin, LoggedModel):
         ), tz)
 
     def copy_data_from(self, other):
-        from . import ItemAddOn, ItemCategory, Item, Question, Quota
+        from . import ItemAddOn, ItemCategory, Item, Question, Quota, ItemMetaValue
         from ..signals import event_copy_data
 
         self.plugins = other.plugins
@@ -540,6 +543,14 @@ class Event(EventMixin, LoggedModel):
             c.save()
             c.log_action('pretix.object.cloned')
 
+        item_meta_properties_map = {}
+        for imp in other.item_meta_properties.all():
+            item_meta_properties_map[imp.pk] = imp
+            imp.pk = None
+            imp.event = self
+            imp.save()
+            imp.log_action('pretix.object.cloned')
+
         item_map = {}
         variation_map = {}
         for i in Item.objects.filter(event=other).prefetch_related('variations'):
@@ -561,6 +572,12 @@ class Event(EventMixin, LoggedModel):
                 v.item = i
                 v.save()
 
+        for imv in ItemMetaValue.objects.filter(item__event=other).prefetch_related('item', 'property'):
+            imv.pk = None
+            imv.property = item_meta_properties_map[imv.property.pk]
+            imv.item = item_map[imv.item.pk]
+            imv.save()
+
         for ia in ItemAddOn.objects.filter(base_item__event=other).prefetch_related('base_item', 'addon_category'):
             ia.pk = None
             ia.base_item = item_map[ia.base_item.pk]
@@ -608,8 +625,10 @@ class Event(EventMixin, LoggedModel):
             q.dependency_question = question_map[q.dependency_question_id]
             q.save(update_fields=['dependency_question'])
 
+        checkin_list_map = {}
         for cl in other.checkin_lists.filter(subevent__isnull=True).prefetch_related('limit_products'):
             items = list(cl.limit_products.all())
+            checkin_list_map[cl.pk] = cl
             cl.pk = None
             cl.event = self
             cl.save()
@@ -664,7 +683,7 @@ class Event(EventMixin, LoggedModel):
         event_copy_data.send(
             sender=self, other=other,
             tax_map=tax_map, category_map=category_map, item_map=item_map, variation_map=variation_map,
-            question_map=question_map
+            question_map=question_map, checkin_list_map=checkin_list_map
         )
 
     def get_payment_providers(self, cached=False) -> dict:
@@ -1016,9 +1035,13 @@ class SubEvent(EventMixin, LoggedModel):
         ordering = ("date_from", "name")
 
     def __str__(self):
-        return '{} - {}'.format(self.name, self.get_date_range_display())
+        return '{} - {} {}'.format(
+            self.name,
+            self.get_date_range_display(),
+            date_format(self.date_from.astimezone(self.timezone), "TIME_FORMAT") if self.settings.show_times else ""
+        ).strip()
 
-    def free_seats(self, ignore_voucher=None, sales_channel='web'):
+    def free_seats(self, ignore_voucher=None, sales_channel='web', include_blocked=False):
         from .orders import CartPosition, Order, OrderPosition
         from .vouchers import Voucher
         vqs = Voucher.objects.filter(
@@ -1052,7 +1075,7 @@ class SubEvent(EventMixin, LoggedModel):
                 vqs
             )
         ).filter(has_order=False, has_cart=False, has_voucher=False)
-        if sales_channel not in self.settings.seating_allow_blocked_seats_for_channel:
+        if not (sales_channel in self.settings.seating_allow_blocked_seats_for_channel or include_blocked):
             qs = qs.filter(blocked=False)
         return qs
 

src/pretix/base/models/giftcards.py

@@ -5,7 +5,8 @@ from django.core.validators import RegexValidator
 from django.db import models
 from django.db.models import Sum
 from django.utils.crypto import get_random_string
-from django.utils.translation import ugettext_lazy as _
+from django.utils.timezone import now
+from django.utils.translation import gettext_lazy as _, pgettext_lazy
 
 from pretix.base.banlist import banned
 from pretix.base.models import LoggedModel
@@ -54,7 +55,7 @@ class GiftCard(LoggedModel):
         validators=[
             RegexValidator(
                 regex="^[a-zA-Z0-9][a-zA-Z0-9.-]+$",
-                message=_("The giftcard code may only contain letters, numbers, dots and dashes."),
+                message=_("The gift card code may only contain letters, numbers, dots and dashes."),
             )
         ],
     )
@@ -62,12 +63,22 @@ class GiftCard(LoggedModel):
         verbose_name=_('Test mode card'),
         default=False
     )
+    expires = models.DateTimeField(
+        null=True, blank=True, verbose_name=_('Expiry date')
+    )
+    conditions = models.TextField(
+        null=True, blank=True, verbose_name=pgettext_lazy('giftcard', 'Special terms and conditions')
+    )
     CURRENCY_CHOICES = [(c.alpha_3, c.alpha_3 + " - " + c.name) for c in settings.CURRENCIES]
     currency = models.CharField(max_length=10, choices=CURRENCY_CHOICES)
 
     def __str__(self):
         return self.secret
 
+    @property
+    def expired(self):
+        return self.expires and now() > self.expires
+
     @property
     def value(self):
         return self.transactions.aggregate(s=Sum('value'))['s'] or Decimal('0.00')
@@ -83,6 +94,7 @@ class GiftCard(LoggedModel):
 
     class Meta:
         unique_together = (('secret', 'issuer'),)
+        ordering = ("issuance",)
 
 
 class GiftCardTransaction(models.Model):
@@ -119,6 +131,7 @@ class GiftCardTransaction(models.Model):
         blank=True,
         on_delete=models.PROTECT
     )
+    text = models.TextField(blank=True, null=True)
 
     class Meta:
         ordering = ("datetime",)

src/pretix/base/models/invoices.py

@@ -111,6 +111,7 @@ class Invoice(models.Model):
 
     file = models.FileField(null=True, blank=True, upload_to=invoice_filename, max_length=255)
     internal_reference = models.TextField(blank=True)
+    custom_field = models.CharField(max_length=255, null=True)
 
     objects = ScopedManager(organizer='event__organizer')
 
@@ -120,13 +121,19 @@ class Invoice(models.Model):
 
     @property
     def full_invoice_from(self):
+        taxidrow = ""
+        if self.invoice_from_tax_id:
+            if str(self.invoice_from_country) == "AU":
+                taxidrow = "ABN: %s" % self.invoice_from_tax_id
+            else:
+                taxidrow = pgettext("invoice", "Tax ID: %s") % self.invoice_from_tax_id
         parts = [
             self.invoice_from_name,
             self.invoice_from,
             (self.invoice_from_zipcode or "") + " " + (self.invoice_from_city or ""),
             self.invoice_from_country.name if self.invoice_from_country else "",
             pgettext("invoice", "VAT-ID: %s") % self.invoice_from_vat_id if self.invoice_from_vat_id else "",
-            pgettext("invoice", "Tax ID: %s") % self.invoice_from_tax_id if self.invoice_from_tax_id else "",
+            taxidrow,
         ]
         return '\n'.join([p.strip() for p in parts if p and p.strip()])
 
@@ -150,9 +157,12 @@ class Invoice(models.Model):
             state_name = self.invoice_to_state
             if str(self.invoice_to_country) in COUNTRIES_WITH_STATE_IN_ADDRESS:
                 if COUNTRIES_WITH_STATE_IN_ADDRESS[str(self.invoice_to_country)][1] == 'long':
-                    state_name = pycountry.subdivisions.get(
-                        code='{}-{}'.format(self.invoice_to_country, self.invoice_to_state)
-                    ).name
+                    try:
+                        state_name = pycountry.subdivisions.get(
+                            code='{}-{}'.format(self.invoice_to_country, self.invoice_to_state)
+                        ).name
+                    except:
+                        pass
 
         parts = [
             self.invoice_to_company,

src/pretix/base/models/items.py

@@ -1,6 +1,6 @@
 import sys
 import uuid
-from collections import Counter
+from collections import Counter, OrderedDict
 from datetime import date, datetime, time
 from decimal import Decimal, DecimalException
 from typing import Tuple
@@ -9,13 +9,14 @@ import dateutil.parser
 import pytz
 from django.conf import settings
 from django.core.exceptions import ValidationError
+from django.core.validators import RegexValidator
 from django.db import models
 from django.db.models import F, Func, Q, Sum
 from django.utils import formats
 from django.utils.crypto import get_random_string
 from django.utils.functional import cached_property
 from django.utils.timezone import is_naive, make_aware, now
-from django.utils.translation import pgettext_lazy, ugettext_lazy as _
+from django.utils.translation import gettext_lazy as _, pgettext_lazy
 from django_countries.fields import Country
 from django_scopes import ScopedManager
 from i18nfield.fields import I18nCharField, I18nTextField
@@ -454,7 +455,8 @@ class Item(LoggedModel):
             t = TaxedPrice(gross=price, net=price, tax=Decimal('0.00'),
                            rate=Decimal('0.00'), name='')
         else:
-            t = self.tax_rule.tax(price, base_price_is=base_price_is, currency=currency)
+            t = self.tax_rule.tax(price, base_price_is=base_price_is,
+                                  currency=currency or self.event.currency)
 
         if include_bundled:
             for b in self.bundles.all():
@@ -591,6 +593,16 @@ class Item(LoggedModel):
             if from_date > until_date:
                 raise ValidationError(_('The item\'s availability cannot end before it starts.'))
 
+    @property
+    def meta_data(self):
+        data = {p.name: p.default for p in self.event.item_meta_properties.all()}
+        if hasattr(self, 'meta_values_cached'):
+            data.update({v.property.name: v.value for v in self.meta_values_cached})
+        else:
+            data.update({v.property.name: v.value for v in self.meta_values.select_related('property').all()})
+
+        return OrderedDict((k, v) for k, v in sorted(data.items(), key=lambda k: k[0]))
+
 
 class ItemVariation(models.Model):
     """
@@ -1105,10 +1117,13 @@ class Question(LoggedModel):
             return None
 
         if self.type == Question.TYPE_CHOICE:
-            try:
-                return self.options.get(Q(pk=answer) | Q(identifier=answer))
-            except:
+            q = Q(identifier=answer)
+            if isinstance(answer, int) or answer.isdigit():
+                q |= Q(pk=answer)
+            o = self.options.filter(q).first()
+            if not o:
                 raise ValidationError(_('Invalid option selected.'))
+            return o
         elif self.type == Question.TYPE_CHOICE_MULTIPLE:
             if isinstance(answer, str):
                 l_ = list(self.options.filter(
@@ -1541,3 +1556,57 @@ class Quota(LoggedModel):
         else:
             if subevent:
                 raise ValidationError(_('The subevent does not belong to this event.'))
+
+
+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.
+
+    :param event: The event this property is defined for.
+    :type event: Event
+    :param name: Name
+    :type name: Name of the property, used in various places
+    :param default: Default value
+    :type default: str
+    """
+    event = models.ForeignKey(Event, related_name="item_meta_properties", on_delete=models.CASCADE)
+    name = models.CharField(
+        max_length=50, db_index=True,
+        help_text=_(
+            "Can not contain spaces or special characters except underscores"
+        ),
+        validators=[
+            RegexValidator(
+                regex="^[a-zA-Z0-9_]+$",
+                message=_("The property name may only contain letters, numbers and underscores."),
+            ),
+        ],
+        verbose_name=_("Name"),
+    )
+    default = models.TextField(blank=True)
+
+
+class ItemMetaValue(LoggedModel):
+    """
+    A meta-data value assigned to an item.
+
+    :param item: The item this metadata is valid for
+    :type item: Item
+    :param property: The property this value belongs to
+    :type property: ItemMetaProperty
+    :param value: The actual value
+    :type value: str
+    """
+    item = models.ForeignKey('Item', on_delete=models.CASCADE, related_name='meta_values')
+    property = models.ForeignKey('ItemMetaProperty', on_delete=models.CASCADE, related_name='item_values')
+    value = models.TextField()
+
+    class Meta:
+        unique_together = ('item', 'property')
+
+    def delete(self, *args, **kwargs):
+        super().delete(*args, **kwargs)
+
+    def save(self, *args, **kwargs):
+        super().save(*args, **kwargs)

src/pretix/base/models/log.py

@@ -6,7 +6,7 @@ from django.db import models
 from django.urls import reverse
 from django.utils.functional import cached_property
 from django.utils.html import escape
-from django.utils.translation import pgettext_lazy, ugettext_lazy as _
+from django.utils.translation import gettext_lazy as _, pgettext_lazy
 
 from pretix.base.signals import logentry_object_link
 

src/pretix/base/models/notifications.py

@@ -1,5 +1,5 @@
 from django.db import models
-from django.utils.translation import ugettext_lazy as _
+from django.utils.translation import gettext_lazy as _
 
 
 class NotificationSetting(models.Model):

src/pretix/base/models/orders.py

@@ -4,6 +4,7 @@ import json
 import logging
 import os
 import string
+from collections import Counter
 from datetime import datetime, time, timedelta
 from decimal import Decimal
 from typing import Any, Dict, List, Union
@@ -25,7 +26,7 @@ from django.utils.encoding import escape_uri_path
 from django.utils.formats import date_format
 from django.utils.functional import cached_property
 from django.utils.timezone import make_aware, now
-from django.utils.translation import pgettext_lazy, ugettext_lazy as _
+from django.utils.translation import gettext_lazy as _, pgettext_lazy
 from django_countries.fields import Country, CountryField
 from django_scopes import ScopedManager, scopes_disabled
 from i18nfield.strings import LazyI18nString
@@ -43,6 +44,7 @@ from pretix.base.services.locking import NoLockManager
 from pretix.base.settings import PERSON_NAME_SCHEMES
 from pretix.base.signals import order_gracefully_delete
 
+from ...helpers.countries import CachedCountries
 from .base import LockModel, LoggedModel
 from .event import Event, SubEvent
 from .items import Item, ItemVariation, Question, QuestionOption, Quota
@@ -151,6 +153,9 @@ class Order(LockModel, LoggedModel):
     datetime = models.DateTimeField(
         verbose_name=_("Date"), db_index=True
     )
+    cancellation_date = models.DateTimeField(
+        null=True, blank=True
+    )
     expires = models.DateTimeField(
         verbose_name=_("Expiration date")
     )
@@ -426,7 +431,7 @@ class Order(LockModel, LoggedModel):
 
     def cancel_allowed(self):
         return (
-            self.status in (Order.STATUS_PENDING, Order.STATUS_PAID) and self.count_positions
+            self.status in (Order.STATUS_PENDING, Order.STATUS_PAID, Order.STATUS_EXPIRED) and self.count_positions
         )
 
     @cached_property
@@ -448,16 +453,17 @@ class Order(LockModel, LoggedModel):
     @cached_property
     def user_cancel_fee(self):
         fee = Decimal('0.00')
-        if self.event.settings.cancel_allow_user_paid_keep:
-            fee += self.event.settings.cancel_allow_user_paid_keep
-        if self.event.settings.cancel_allow_user_paid_keep_percentage:
-            fee += self.event.settings.cancel_allow_user_paid_keep_percentage / Decimal('100.0') * self.total
         if self.event.settings.cancel_allow_user_paid_keep_fees:
             fee += self.fees.filter(
-                fee_type__in=(OrderFee.FEE_TYPE_PAYMENT, OrderFee.FEE_TYPE_SHIPPING, OrderFee.FEE_TYPE_SERVICE)
+                fee_type__in=(OrderFee.FEE_TYPE_PAYMENT, OrderFee.FEE_TYPE_SHIPPING, OrderFee.FEE_TYPE_SERVICE,
+                              OrderFee.FEE_TYPE_CANCELLATION)
             ).aggregate(
                 s=Sum('value')
             )['s'] or 0
+        if self.event.settings.cancel_allow_user_paid_keep_percentage:
+            fee += self.event.settings.cancel_allow_user_paid_keep_percentage / Decimal('100.0') * (self.total - fee)
+        if self.event.settings.cancel_allow_user_paid_keep:
+            fee += self.event.settings.cancel_allow_user_paid_keep
         return round_decimal(fee, self.event.currency)
 
     @property
@@ -468,6 +474,8 @@ class Order(LockModel, LoggedModel):
         """
         from .checkin import Checkin
 
+        if self.cancellation_requests.exists():
+            return False
         positions = list(
             self.positions.all().annotate(
                 has_checkin=Exists(Checkin.objects.filter(position_id=OuterRef('pk')))
@@ -693,16 +701,19 @@ class Order(LockModel, LoggedModel):
 
         return self._is_still_available(count_waitinglist=count_waitinglist, force=force)
 
-    def _is_still_available(self, now_dt: datetime=None, count_waitinglist=True, force=False) -> Union[bool, str]:
+    def _is_still_available(self, now_dt: datetime=None, count_waitinglist=True, force=False,
+                            check_voucher_usage=False) -> Union[bool, str]:
         error_messages = {
             'unavailable': _('The ordered product "{item}" is no longer available.'),
             'seat_unavailable': _('The seat "{seat}" is no longer available.'),
             'voucher_budget': _('The voucher "{voucher}" no longer has sufficient budget.'),
+            'voucher_usages': _('The voucher "{voucher}" has been used in the meantime.'),
         }
         now_dt = now_dt or now()
         positions = self.positions.all().select_related('item', 'variation', 'seat', 'voucher')
         quota_cache = {}
         v_budget = {}
+        v_usage = Counter()
         try:
             for i, op in enumerate(positions):
                 if op.seat:
@@ -721,6 +732,13 @@ class Order(LockModel, LoggedModel):
                         ))
                     v_budget[op.voucher] -= disc
 
+                if op.voucher and check_voucher_usage:
+                    v_usage[op.voucher.pk] += 1
+                    if v_usage[op.voucher.pk] + op.voucher.redeemed > op.voucher.max_usages:
+                        raise Quota.QuotaExceededException(error_messages['voucher_usages'].format(
+                            voucher=op.voucher.code
+                        ))
+
                 quotas = list(op.quotas)
                 if len(quotas) == 0:
                     raise Quota.QuotaExceededException(error_messages['unavailable'].format(
@@ -1048,6 +1066,13 @@ class AbstractPosition(models.Model):
         'Seat', null=True, blank=True, on_delete=models.PROTECT
     )
 
+    company = models.CharField(max_length=255, blank=True, verbose_name=_('Company name'), null=True)
+    street = models.TextField(verbose_name=_('Address'), blank=True, null=True)
+    zipcode = models.CharField(max_length=30, verbose_name=_('ZIP code'), blank=True, null=True)
+    city = models.CharField(max_length=255, verbose_name=_('City'), blank=True, null=True)
+    country = CountryField(verbose_name=_('Country'), blank=True, blank_label=_('Select country'), null=True)
+    state = models.CharField(max_length=255, verbose_name=pgettext_lazy('address', 'State'), blank=True, null=True)
+
     class Meta:
         abstract = True
 
@@ -2089,11 +2114,13 @@ class InvoiceAddress(models.Model):
     zipcode = models.CharField(max_length=30, verbose_name=_('ZIP code'), blank=False)
     city = models.CharField(max_length=255, verbose_name=_('City'), blank=False)
     country_old = models.CharField(max_length=255, verbose_name=_('Country'), blank=False)
-    country = CountryField(verbose_name=_('Country'), blank=False, blank_label=_('Select country'))
+    country = CountryField(verbose_name=_('Country'), blank=False, blank_label=_('Select country'),
+                           countries=CachedCountries)
     state = models.CharField(max_length=255, verbose_name=pgettext_lazy('address', 'State'), blank=True)
     vat_id = models.CharField(max_length=255, blank=True, verbose_name=_('VAT ID'),
                               help_text=_('Only for business customers within the EU.'))
     vat_id_validated = models.BooleanField(default=False)
+    custom_field = models.CharField(max_length=255, null=True, blank=True)
     internal_reference = models.TextField(
         verbose_name=_('Internal reference'),
         help_text=_('This reference will be printed on your invoice for your convenience.'),
@@ -2195,6 +2222,13 @@ class CachedCombinedTicket(models.Model):
     created = models.DateTimeField(auto_now_add=True)
 
 
+class CancellationRequest(models.Model):
+    order = models.ForeignKey(Order, on_delete=models.CASCADE, related_name='cancellation_requests')
+    created = models.DateTimeField(auto_now_add=True)
+    cancellation_fee = models.DecimalField(max_digits=10, decimal_places=2)
+    refund_as_giftcard = models.BooleanField(default=False)
+
+
 @receiver(post_delete, sender=CachedTicket)
 def cachedticket_delete(sender, instance, **kwargs):
     if instance.file:

src/pretix/base/models/organizer.py

@@ -1,11 +1,13 @@
 import string
+from datetime import date, datetime, time
 
 from django.core.validators import RegexValidator
 from django.db import models
 from django.db.models import Exists, OuterRef, Q
 from django.utils.crypto import get_random_string
 from django.utils.functional import cached_property
-from django.utils.translation import ugettext_lazy as _
+from django.utils.timezone import get_current_timezone, make_aware, now
+from django.utils.translation import gettext_lazy as _
 
 from pretix.base.models.base import LoggedModel
 from pretix.base.validators import OrganizerSlugBanlistValidator
@@ -101,6 +103,15 @@ class Organizer(LoggedModel):
             Q(issuer=self) | Q(accepted=True)
         )
 
+    @property
+    def default_gift_card_expiry(self):
+        if self.settings.giftcard_expiry_years is not None:
+            tz = get_current_timezone()
+            return make_aware(datetime.combine(
+                date(now().astimezone(tz).year + self.settings.get('giftcard_expiry_years', as_type=int), 12, 31),
+                time(hour=23, minute=59, second=59)
+            ), tz)
+
     def allow_delete(self):
         from . import Order, Invoice
         return (

src/pretix/base/models/seating.py

@@ -8,7 +8,7 @@ from django.db import models
 from django.db.models import F, Q
 from django.utils.deconstruct import deconstructible
 from django.utils.timezone import now
-from django.utils.translation import gettext, ugettext_lazy as _
+from django.utils.translation import gettext, gettext_lazy as _
 
 from pretix.base.models import Event, Item, LoggedModel, Organizer, SubEvent
 

src/pretix/base/models/tax.py

@@ -4,7 +4,7 @@ from decimal import Decimal
 from django.core.exceptions import ValidationError
 from django.db import models
 from django.utils.formats import localize
-from django.utils.translation import ugettext_lazy as _
+from django.utils.translation import gettext_lazy as _
 from django_countries.fields import CountryField
 from i18nfield.fields import I18nCharField
 

src/pretix/base/models/vouchers.py

@@ -8,7 +8,7 @@ from django.db.models import F, OuterRef, Q, Subquery, Sum
 from django.db.models.functions import Coalesce
 from django.utils.crypto import get_random_string
 from django.utils.timezone import now
-from django.utils.translation import pgettext_lazy, ugettext_lazy as _
+from django.utils.translation import gettext_lazy as _, pgettext_lazy
 from django_scopes import ScopedManager, scopes_disabled
 
 from pretix.base.banlist import banned

src/pretix/base/models/waitinglist.py

@@ -3,7 +3,7 @@ from datetime import timedelta
 from django.core.exceptions import ValidationError
 from django.db import models, transaction
 from django.utils.timezone import now
-from django.utils.translation import pgettext_lazy, ugettext_lazy as _
+from django.utils.translation import gettext_lazy as _, pgettext_lazy
 from django_scopes import ScopedManager
 
 from pretix.base.email import get_email_context

src/pretix/base/notifications.py

@@ -3,7 +3,7 @@ from collections import OrderedDict, namedtuple
 
 from django.dispatch import receiver
 from django.utils.formats import date_format
-from django.utils.translation import pgettext_lazy, ugettext_lazy as _
+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
@@ -223,6 +223,12 @@ def register_default_notification_types(sender, **kwargs):
             _('Order canceled'),
             _('Order {order.code} has been canceled.')
         ),
+        ParametrizedOrderNotificationType(
+            sender,
+            'pretix.event.order.reactivated',
+            _('Order reactivated'),
+            _('Order {order.code} has been reactivated.')
+        ),
         ParametrizedOrderNotificationType(
             sender,
             'pretix.event.order.expired',

src/pretix/base/orderimport.py

@@ -325,7 +325,7 @@ class InvoiceAddressState(ImportColumn):
 
     @property
     def verbose_name(self):
-        return _('Invoice address') + ': ' + _('State')
+        return _('Invoice address') + ': ' + pgettext('address', 'State')
 
     def clean(self, value, previous_values):
         if value:
@@ -398,6 +398,99 @@ class AttendeeEmail(ImportColumn):
         position.attendee_email = value
 
 
+class AttendeeCompany(ImportColumn):
+    identifier = 'attendee_company'
+
+    @property
+    def verbose_name(self):
+        return _('Attendee address') + ': ' + _('Company')
+
+    def assign(self, value, order, position, invoice_address, **kwargs):
+        position.company = value or ''
+
+
+class AttendeeStreet(ImportColumn):
+    identifier = 'attendee_street'
+
+    @property
+    def verbose_name(self):
+        return _('Attendee address') + ': ' + _('Address')
+
+    def assign(self, value, order, position, invoice_address, **kwargs):
+        position.address = value or ''
+
+
+class AttendeeZip(ImportColumn):
+    identifier = 'attendee_zipcode'
+
+    @property
+    def verbose_name(self):
+        return _('Attendee address') + ': ' + _('ZIP code')
+
+    def assign(self, value, order, position, invoice_address, **kwargs):
+        position.zipcode = value or ''
+
+
+class AttendeeCity(ImportColumn):
+    identifier = 'attendee_city'
+
+    @property
+    def verbose_name(self):
+        return _('Attendee address') + ': ' + _('City')
+
+    def assign(self, value, order, position, invoice_address, **kwargs):
+        position.city = value or ''
+
+
+class AttendeeCountry(ImportColumn):
+    identifier = 'attendee_country'
+    default_value = None
+
+    @property
+    def initial(self):
+        return 'static:' + str(guess_country(self.event))
+
+    @property
+    def verbose_name(self):
+        return _('Attendee address') + ': ' + _('Country')
+
+    def static_choices(self):
+        return list(countries)
+
+    def clean(self, value, previous_values):
+        if value and not Country(value).numeric:
+            raise ValidationError(_("Please enter a valid country code."))
+        return value
+
+    def assign(self, value, order, position, invoice_address, **kwargs):
+        position.country = value or ''
+
+
+class AttendeeState(ImportColumn):
+    identifier = 'attendee_state'
+
+    @property
+    def verbose_name(self):
+        return _('Attendee address') + ': ' + _('State')
+
+    def clean(self, value, previous_values):
+        if value:
+            if previous_values.get('attendee_country') not in COUNTRIES_WITH_STATE_IN_ADDRESS:
+                raise ValidationError(_("States are not supported for this country."))
+
+            types, form = COUNTRIES_WITH_STATE_IN_ADDRESS[previous_values.get('attendee_country')]
+            match = [
+                s for s in pycountry.subdivisions.get(country_code=previous_values.get('attendee_country'))
+                if s.type in types and (s.code[3:] == value or s.name == value)
+            ]
+            if len(match) == 0:
+                raise ValidationError(_("Please enter a valid state."))
+            return match[0].code[3:]
+
+    def assign(self, value, order, position, invoice_address, **kwargs):
+        position.state = value or ''
+
+
 class Price(ImportColumn):
     identifier = 'price'
     verbose_name = gettext_lazy('Price')
@@ -596,6 +689,12 @@ def get_all_columns(event):
         default.append(AttendeeNamePart(event, n, l))
     default += [
         AttendeeEmail(event),
+        AttendeeCompany(event),
+        AttendeeStreet(event),
+        AttendeeZip(event),
+        AttendeeCity(event),
+        AttendeeCountry(event),
+        AttendeeState(event),
         Price(event),
         Secret(event),
         Locale(event),

src/pretix/base/payment.py

@@ -17,7 +17,7 @@ from django.http import HttpRequest
 from django.template.loader import get_template
 from django.utils.crypto import get_random_string
 from django.utils.timezone import now
-from django.utils.translation import pgettext_lazy, ugettext_lazy as _
+from django.utils.translation import gettext_lazy as _, pgettext_lazy
 from django_countries import Countries
 from i18nfield.forms import I18nFormField, I18nTextarea, I18nTextInput
 from i18nfield.strings import LazyI18nString
@@ -29,6 +29,7 @@ from pretix.base.models import (
     OrderRefund, Quota,
 )
 from pretix.base.reldate import RelativeDateField, RelativeDateWrapper
+from pretix.base.services.cart import get_fees
 from pretix.base.settings import SettingsSandbox
 from pretix.base.signals import register_payment_providers
 from pretix.base.templatetags.money import money_filter
@@ -1096,6 +1097,9 @@ class GiftCardPayment(BasePaymentProvider):
             if not gc.testmode and self.event.testmode:
                 messages.error(request, _("Only test gift cards can be used in test mode."))
                 return
+            if gc.expires and gc.expires < now():
+                messages.error(request, _("This gift card is no longer valid."))
+                return
             if gc.value <= Decimal("0.00"):
                 messages.error(request, _("All credit on this gift card has been used."))
                 return
@@ -1106,8 +1110,16 @@ class GiftCardPayment(BasePaymentProvider):
                 return
             cs['gift_cards'] = cs['gift_cards'] + [gc.pk]
 
-            remainder = cart['total'] - gc.value
-            if remainder >= Decimal('0.00'):
+            total = sum(p.total for p in cart['positions'])
+            # Recompute fees. Some plugins, e.g. pretix-servicefees, change their fee schedule if a gift card is
+            # applied.
+            fees = get_fees(
+                self.event, request, total, cart['invoice_address'], cs.get('payment'),
+                cart['raw']
+            )
+            total += sum([f.value for f in fees])
+            remainder = total - gc.value
+            if remainder > Decimal('0.00'):
                 del cs['payment']
                 messages.success(request, _("Your gift card has been applied, but {} still need to be paid. Please select a payment method.").format(
                     money_filter(remainder, self.event.currency)
@@ -1147,6 +1159,9 @@ class GiftCardPayment(BasePaymentProvider):
             if not gc.testmode and payment.order.testmode:
                 messages.error(request, _("Only test gift cards can be used in test mode."))
                 return
+            if gc.expires and gc.expires < now():
+                messages.error(request, _("This gift card is no longer valid."))
+                return
             if gc.value <= Decimal("0.00"):
                 messages.error(request, _("All credit on this gift card has been used."))
                 return
@@ -1185,6 +1200,9 @@ class GiftCardPayment(BasePaymentProvider):
                 raise PaymentException(_("This gift card is not accepted by this event organizer."))
             if payment.amount > gc.value:  # noqa - just a safeguard
                 raise PaymentException(_("This gift card was used in the meantime. Please try again"))
+            if gc.expires and gc.expires < now():  # noqa - just a safeguard
+                messages.error(request, _("This gift card is no longer valid."))
+                return
             trans = gc.transactions.create(
                 value=-1 * payment.amount,
                 order=payment.order,
@@ -1210,6 +1228,7 @@ class GiftCardPayment(BasePaymentProvider):
         )
         refund.info_data = {
             'gift_card': gc.pk,
+            'gift_card_code': gc.secret,
             'transaction_id': trans.pk,
         }
         refund.done()

src/pretix/base/pdf.py

@@ -17,7 +17,7 @@ from django.dispatch import receiver
 from django.utils.formats import date_format
 from django.utils.html import conditional_escape
 from django.utils.timezone import now
-from django.utils.translation import ugettext_lazy as _
+from django.utils.translation import gettext_lazy as _
 from PyPDF2 import PdfFileReader
 from pytz import timezone
 from reportlab.graphics import renderPDF
@@ -205,9 +205,14 @@ DEFAULT_VARIABLES = OrderedDict((
         "editor_sample": _("Sample city"),
         "evaluate": lambda op, order, ev: order.invoice_address.city if getattr(order, 'invoice_address', None) else ''
     }),
+    ("attendee_company", {
+        "label": _("Attendee company"),
+        "editor_sample": _("Sample company"),
+        "evaluate": lambda op, order, ev: op.company or (op.addon_to.company if op.addon_to else '')
+    }),
     ("addons", {
         "label": _("List of Add-Ons"),
-        "editor_sample": _("Addon 1\nAddon 2"),
+        "editor_sample": _("Add-on 1\nAdd-on 2"),
         "evaluate": lambda op, order, ev: "\n".join([
             '{} - {}'.format(p.item, p.variation) if p.variation else str(p.item)
             for p in (
@@ -431,6 +436,8 @@ class Renderer:
             return '(error)'
         if o['content'] == 'other':
             return o['text']
+        elif o['content'].startswith('itemmeta:'):
+            return op.item.meta_data.get(o['content'][9:]) or ''
         elif o['content'].startswith('meta:'):
             return ev.meta_data.get(o['content'][5:]) or ''
         elif o['content'] in self.variables:

src/pretix/base/reldate.py

@@ -7,7 +7,7 @@ from dateutil import parser
 from django import forms
 from django.core.exceptions import ValidationError
 from django.db import models
-from django.utils.translation import ugettext_lazy as _
+from django.utils.translation import gettext_lazy as _
 from rest_framework import serializers
 
 BASE_CHOICES = (
@@ -324,7 +324,7 @@ class ModelRelativeDateTimeField(models.CharField):
             return value.to_string()
         return value
 
-    def from_db_value(self, value, expression, connection, context):
+    def from_db_value(self, value, expression, connection):
         if value is None:
             return None
         return RelativeDateWrapper.from_string(value)

src/pretix/base/services/cancelevent.py

@@ -0,0 +1,227 @@
+import logging
+from decimal import Decimal
+
+from django.db import transaction
+from django.db.models import Count, Exists, IntegerField, OuterRef, Subquery
+from i18nfield.strings import LazyI18nString
+
+from pretix.base.decimal import round_decimal
+from pretix.base.email import get_email_context
+from pretix.base.i18n import language
+from pretix.base.models import (
+    Event, InvoiceAddress, Order, OrderFee, OrderPosition, OrderRefund,
+    SubEvent, User, WaitingListEntry,
+)
+from pretix.base.services.locking import LockTimeoutException
+from pretix.base.services.mail import SendMailException, TolerantDict, mail
+from pretix.base.services.orders import (
+    OrderChangeManager, OrderError, _cancel_order, _try_auto_refund,
+)
+from pretix.base.services.tasks import ProfiledEventTask
+from pretix.celery_app import app
+
+logger = logging.getLogger(__name__)
+
+
+def _send_wle_mail(wle: WaitingListEntry, subject: LazyI18nString, message: LazyI18nString, subevent: SubEvent):
+    with language(wle.locale):
+        email_context = get_email_context(event_or_subevent=subevent or wle.event, event=wle.event)
+        try:
+            mail(
+                wle.email,
+                str(subject).format_map(TolerantDict(email_context)),
+                message,
+                email_context,
+                wle.event,
+                locale=wle.locale
+            )
+        except SendMailException:
+            logger.exception('Waiting list canceled email could not be sent')
+
+
+def _send_mail(order: Order, subject: LazyI18nString, message: LazyI18nString, subevent: SubEvent,
+               refund_amount: Decimal, user: User, positions: list):
+    with language(order.locale):
+        try:
+            ia = order.invoice_address
+        except InvoiceAddress.DoesNotExist:
+            ia = InvoiceAddress()
+
+        email_context = get_email_context(event_or_subevent=subevent or order.event, refund_amount=refund_amount,
+                                          order=order, position_or_address=ia, event=order.event)
+        real_subject = str(subject).format_map(TolerantDict(email_context))
+        try:
+            order.send_mail(
+                real_subject, message, email_context,
+                'pretix.event.order.email.event_canceled',
+                user,
+            )
+        except SendMailException:
+            logger.exception('Order canceled email could not be sent')
+
+        for p in positions:
+            if subevent and p.subevent_id != subevent.id:
+                continue
+
+            if p.addon_to_id is None and p.attendee_email and p.attendee_email != order.email:
+                real_subject = str(subject).format_map(TolerantDict(email_context))
+                email_context = get_email_context(event_or_subevent=subevent or order.event,
+                                                  event=order.event,
+                                                  refund_amount=refund_amount,
+                                                  position_or_address=p,
+                                                  order=order, position=p)
+                try:
+                    order.send_mail(
+                        real_subject, message, email_context,
+                        'pretix.event.order.email.event_canceled',
+                        position=p,
+                        user=user
+                    )
+                except SendMailException:
+                    logger.exception('Order canceled email could not be sent to attendee')
+
+
+@app.task(base=ProfiledEventTask, bind=True, max_retries=5, default_retry_delay=1, throws=(OrderError,))
+def cancel_event(self, event: Event, subevent: int, auto_refund: bool, keep_fee_fixed: str,
+                 keep_fee_percentage: str, keep_fees: list=None, manual_refund: bool=False,
+                 send: bool=False, send_subject: dict=None, send_message: dict=None,
+                 send_waitinglist: bool=False, send_waitinglist_subject: dict={}, send_waitinglist_message: dict={},
+                 user: int=None, refund_as_giftcard: bool=False, giftcard_expires=None, giftcard_conditions=None):
+    send_subject = LazyI18nString(send_subject)
+    send_message = LazyI18nString(send_message)
+    send_waitinglist_subject = LazyI18nString(send_waitinglist_subject)
+    send_waitinglist_message = LazyI18nString(send_waitinglist_message)
+    if user:
+        user = User.objects.get(pk=user)
+
+    s = OrderPosition.objects.filter(
+        order=OuterRef('pk')
+    ).order_by().values('order').annotate(k=Count('id')).values('k')
+    orders_to_cancel = event.orders.annotate(pcnt=Subquery(s, output_field=IntegerField())).filter(
+        status__in=[Order.STATUS_PAID, Order.STATUS_PENDING, Order.STATUS_EXPIRED],
+        pcnt__gt=0
+    ).all()
+
+    if subevent:
+        subevent = event.subevents.get(pk=subevent)
+
+        has_subevent = OrderPosition.objects.filter(order_id=OuterRef('pk')).filter(
+            subevent=subevent
+        )
+        has_other_subevent = OrderPosition.objects.filter(order_id=OuterRef('pk')).exclude(
+            subevent=subevent
+        )
+        orders_to_change = orders_to_cancel.annotate(
+            has_subevent=Exists(has_subevent),
+            has_other_subevent=Exists(has_other_subevent),
+        ).filter(
+            has_subevent=True, has_other_subevent=True
+        )
+        orders_to_cancel = orders_to_cancel.annotate(
+            has_subevent=Exists(has_subevent),
+            has_other_subevent=Exists(has_other_subevent),
+        ).filter(
+            has_subevent=True, has_other_subevent=False
+        )
+
+        subevent.log_action(
+            'pretix.subevent.canceled', user=user,
+        )
+        subevent.active = False
+        subevent.save(update_fields=['active'])
+        subevent.log_action(
+            'pretix.subevent.changed', user=user, data={'active': False, '_source': 'cancel_event'}
+        )
+    else:
+        orders_to_change = event.orders.none()
+        event.log_action(
+            'pretix.event.canceled', user=user,
+        )
+
+        for i in event.items.filter(active=True):
+            i.active = False
+            i.save(update_fields=['active'])
+            i.log_action(
+                'pretix.event.item.changed', user=user, data={'active': False, '_source': 'cancel_event'}
+            )
+    failed = 0
+
+    for o in orders_to_cancel.only('id', 'total'):
+        try:
+            fee = Decimal('0.00')
+            fee_sum = Decimal('0.00')
+            keep_fee_objects = []
+            if keep_fees:
+                for f in o.fees.all():
+                    if f.fee_type in keep_fees:
+                        fee += f.value
+                        keep_fee_objects.append(f)
+                    fee_sum += f.value
+            if keep_fee_percentage:
+                fee += Decimal(keep_fee_percentage) / Decimal('100.00') * (o.total - fee_sum)
+            if keep_fee_fixed:
+                fee += Decimal(keep_fee_fixed)
+            fee = round_decimal(min(fee, o.payment_refund_sum), event.currency)
+
+            _cancel_order(o.pk, user, send_mail=False, cancellation_fee=fee, keep_fees=keep_fee_objects)
+            refund_amount = o.payment_refund_sum
+
+            try:
+                if auto_refund:
+                    _try_auto_refund(o.pk, manual_refund=manual_refund, allow_partial=True,
+                                     source=OrderRefund.REFUND_SOURCE_ADMIN, refund_as_giftcard=refund_as_giftcard,
+                                     giftcard_expires=giftcard_expires, giftcard_conditions=giftcard_conditions)
+            finally:
+                if send:
+                    _send_mail(o, send_subject, send_message, subevent, refund_amount, user, o.positions.all())
+        except LockTimeoutException:
+            logger.exception("Could not cancel order")
+            failed += 1
+        except OrderError:
+            logger.exception("Could not cancel order")
+            failed += 1
+
+    for o in orders_to_change.values_list('id', flat=True):
+        with transaction.atomic():
+            o = event.orders.select_for_update().get(pk=o)
+            total = Decimal('0.00')
+            positions = []
+
+            ocm = OrderChangeManager(o, user=user, notify=False)
+            for p in o.positions.all():
+                if p.subevent == subevent:
+                    total += p.price
+                    ocm.cancel(p)
+                    positions.append(p)
+
+            fee = Decimal('0.00')
+            if keep_fee_fixed:
+                fee += Decimal(keep_fee_fixed)
+            if keep_fee_percentage:
+                fee += Decimal(keep_fee_percentage) / Decimal('100.00') * total
+            fee = round_decimal(min(fee, o.payment_refund_sum), event.currency)
+            if fee:
+                f = OrderFee(
+                    fee_type=OrderFee.FEE_TYPE_CANCELLATION,
+                    value=fee,
+                    order=o,
+                    tax_rule=o.event.settings.tax_rate_default,
+                )
+                f._calculate_tax()
+                ocm.add_fee(f)
+
+            ocm.commit()
+            refund_amount = o.payment_refund_sum - o.total
+
+            if auto_refund:
+                _try_auto_refund(o.pk, manual_refund=manual_refund, allow_partial=True,
+                                 source=OrderRefund.REFUND_SOURCE_ADMIN, refund_as_giftcard=refund_as_giftcard,
+                                 giftcard_expires=giftcard_expires, giftcard_conditions=giftcard_conditions)
+
+            if send:
+                _send_mail(o, send_subject, send_message, subevent, refund_amount, user, positions)
+
+    for wle in event.waitinglistentries.filter(subevent=subevent, voucher__isnull=True):
+        _send_wle_mail(wle, send_waitinglist_subject, send_waitinglist_message, subevent)
+
+    return failed

src/pretix/base/services/cart.py

@@ -9,7 +9,7 @@ from django.db import DatabaseError, transaction
 from django.db.models import Count, Exists, OuterRef, Q
 from django.dispatch import receiver
 from django.utils.timezone import make_aware, now
-from django.utils.translation import pgettext_lazy, ugettext as _
+from django.utils.translation import gettext as _, pgettext_lazy
 from django_scopes import scopes_disabled
 
 from pretix.base.channels import get_all_sales_channels
@@ -213,7 +213,7 @@ class CartManager:
                 has_variations=Count('variations'),
             ).filter(
                 id__in=[i for i in item_ids if i and i not in self._items_cache]
-            )
+            ).order_by()
         })
         self._variations_cache.update({
             v.pk: v
@@ -221,7 +221,7 @@ class CartManager:
                 'quotas'
             ).select_related('item', 'item__event').filter(
                 id__in=[i for i in variation_ids if i and i not in self._variations_cache]
-            )
+            ).order_by()
         })
 
     def _check_max_cart_size(self):
@@ -303,32 +303,6 @@ class CartManager:
             if op.item.require_bundling and not op.addon_to == 'FAKE':
                 raise CartError(error_messages['bundled_only'])
 
-            if op.item.max_per_order or op.item.min_per_order:
-                new_total = (
-                    len([1 for p in self.positions if p.item_id == op.item.pk]) +
-                    sum([_op.count for _op in self._operations + current_ops
-                         if isinstance(_op, self.AddOperation) and _op.item == op.item]) +
-                    op.count -
-                    len([1 for _op in self._operations + current_ops
-                         if isinstance(_op, self.RemoveOperation) and _op.position.item_id == op.item.pk])
-                )
-
-            if op.item.max_per_order and new_total > op.item.max_per_order:
-                raise CartError(
-                    _(error_messages['max_items_per_product']) % {
-                        'max': op.item.max_per_order,
-                        'product': op.item.name
-                    }
-                )
-
-            if op.item.min_per_order and new_total < op.item.min_per_order:
-                raise CartError(
-                    _(error_messages['min_items_per_product']) % {
-                        'min': op.item.min_per_order,
-                        'product': op.item.name
-                    }
-                )
-
     def _get_price(self, item: Item, variation: Optional[ItemVariation],
                    voucher: Optional[Voucher], custom_price: Optional[Decimal],
                    subevent: Optional[SubEvent], cp_is_net: bool=None, force_custom_price=False,
@@ -787,37 +761,48 @@ class CartManager:
 
         return vouchers_ok
 
-    def _check_min_per_product(self):
-        per_product = Counter()
-        min_per_product = {}
+    def _check_min_max_per_product(self):
+        items = Counter()
         for p in self.positions:
-            per_product[p.item_id] += 1
-            min_per_product[p.item.pk] = p.item.min_per_order
-
+            items[p.item] += 1
         for op in self._operations:
             if isinstance(op, self.AddOperation):
-                per_product[op.item.pk] += op.count
-                min_per_product[op.item.pk] = op.item.min_per_order
+                items[op.item] += op.count
             elif isinstance(op, self.RemoveOperation):
-                per_product[op.position.item_id] -= 1
-                min_per_product[op.position.item.pk] = op.position.item.min_per_order
+                items[op.position.item] -= 1
 
         err = None
-        for itemid, num in per_product.items():
-            min_p = min_per_product[itemid]
-            if min_p and num < min_p:
+        for item, count in items.items():
+            if count == 0:
+                continue
+
+            if item.max_per_order and count > item.max_per_order:
+                raise CartError(
+                    _(error_messages['max_items_per_product']) % {
+                        'max': item.max_per_order,
+                        'product': item.name
+                    }
+                )
+
+            if item.min_per_order and count < item.min_per_order:
                 self._operations = [o for o in self._operations if not (
-                    isinstance(o, self.AddOperation) and o.item.pk == itemid
+                    isinstance(o, self.AddOperation) and o.item.pk == item.pk
                 )]
                 removals = [o.position.pk for o in self._operations if isinstance(o, self.RemoveOperation)]
                 for p in self.positions:
-                    if p.item_id == itemid and p.pk not in removals:
+                    if p.item_id == item.pk and p.pk not in removals:
                         self._operations.append(self.RemoveOperation(position=p))
                         err = _(error_messages['min_items_per_product_removed']) % {
-                            'min': min_p,
-                            'product': p.item.name
+                            'min': item.min_per_order,
+                            'product': item.name
                         }
-
+                if not err:
+                    raise CartError(
+                        _(error_messages['min_items_per_product']) % {
+                            'min': item.min_per_order,
+                            'product': item.name
+                        }
+                    )
         return err
 
     def _perform_operations(self):
@@ -826,7 +811,7 @@ class CartManager:
         err = None
         new_cart_positions = []
 
-        err = err or self._check_min_per_product()
+        err = err or self._check_min_max_per_product()
 
         self._operations.sort(key=lambda a: self.order[type(a)])
         seats_seen = set()
@@ -1123,7 +1108,7 @@ def add_items_to_cart(self, event: int, items: List[dict], cart_id: str=None, lo
     :param event: The event ID in question
     :param items: A list of dicts with the keys item, variation, count, custom_price, voucher, seat ID
     :param cart_id: Session ID of a guest
-    :raises CartError: On any error that occured
+    :raises CartError: On any error that occurred
     """
     with language(locale):
         ia = False

src/pretix/base/services/checkin.py

@@ -2,7 +2,7 @@ from django.db import transaction
 from django.db.models import Prefetch
 from django.dispatch import receiver
 from django.utils.timezone import now
-from django.utils.translation import ugettext as _
+from django.utils.translation import gettext as _
 
 from pretix.base.models import (
     Checkin, CheckinList, Order, OrderPosition, Question, QuestionOption,

src/pretix/base/services/export.py

@@ -2,7 +2,7 @@ from typing import Any, Dict
 
 from django.core.files.base import ContentFile
 from django.utils.timezone import override
-from django.utils.translation import ugettext
+from django.utils.translation import gettext
 
 from pretix.base.i18n import LazyLocaleException, language
 from pretix.base.models import CachedFile, Event, cachedfile_name
@@ -26,7 +26,7 @@ def export(event: Event, fileid: str, provider: str, form_data: Dict[str, Any])
                 d = ex.render(form_data)
                 if d is None:
                     raise ExportError(
-                        ugettext('Your export did not contain any data.')
+                        gettext('Your export did not contain any data.')
                     )
                 file.filename, file.type, data = d
                 file.file.save(cachedfile_name(file, file.filename), ContentFile(data))

src/pretix/base/services/invoices.py

@@ -15,7 +15,7 @@ from django.dispatch import receiver
 from django.utils import timezone
 from django.utils.formats import date_format
 from django.utils.timezone import now
-from django.utils.translation import pgettext, ugettext as _
+from django.utils.translation import gettext as _, pgettext
 from django_countries.fields import Country
 from django_scopes import scope, scopes_disabled
 from i18nfield.strings import LazyI18nString
@@ -37,6 +37,10 @@ logger = logging.getLogger(__name__)
 
 @transaction.atomic
 def build_invoice(invoice: Invoice) -> Invoice:
+    invoice.locale = invoice.event.settings.get('invoice_language', invoice.event.settings.locale)
+    if invoice.locale == '__user__':
+        invoice.locale = invoice.order.locale or invoice.event.settings.locale
+
     lp = invoice.order.payments.last()
 
     with language(invoice.locale):
@@ -85,6 +89,7 @@ def build_invoice(invoice: Invoice) -> Invoice:
                 ).split("\n") if a.strip()
             )
             invoice.internal_reference = ia.internal_reference
+            invoice.custom_field = ia.custom_field
             invoice.invoice_to_company = ia.company
             invoice.invoice_to_name = ia.name
             invoice.invoice_to_street = ia.street
@@ -249,17 +254,11 @@ def regenerate_invoice(invoice: Invoice):
 
 
 def generate_invoice(order: Order, trigger_pdf=True):
-    locale = order.event.settings.get('invoice_language', order.event.settings.locale)
-    if locale:
-        if locale == '__user__':
-            locale = order.locale or order.event.settings.locale
-
     invoice = Invoice(
         order=order,
         event=order.event,
         organizer=order.event.organizer,
         date=timezone.now().date(),
-        locale=locale
     )
     invoice = build_invoice(invoice)
     if trigger_pdf:
@@ -313,7 +312,7 @@ def build_preview_invoice_pdf(event):
 
     with rolledback_transaction(), language(locale):
         order = event.orders.create(status=Order.STATUS_PENDING, datetime=timezone.now(),
-                                    expires=timezone.now(), code="PREVIEW", total=119)
+                                    expires=timezone.now(), code="PREVIEW", total=100 * event.tax_rules.count())
         invoice = Invoice(
             order=order, event=event, invoice_no="PREVIEW",
             date=timezone.now().date(), locale=locale, organizer=event.organizer
@@ -351,7 +350,7 @@ def build_preview_invoice_pdf(event):
 
         if event.tax_rules.exists():
             for i, tr in enumerate(event.tax_rules.all()):
-                tax = tr.tax(Decimal('100.00'))
+                tax = tr.tax(Decimal('100.00'), base_price_is='gross')
                 InvoiceLine.objects.create(
                     invoice=invoice, description=_("Sample product {}").format(i + 1),
                     gross_value=tax.gross, tax_value=tax.tax,

src/pretix/base/services/mail.py

@@ -20,7 +20,7 @@ from django.core.mail import (
 )
 from django.core.mail.message import SafeMIMEText
 from django.template.loader import get_template
-from django.utils.translation import pgettext, ugettext as _
+from django.utils.translation import gettext as _, pgettext
 from django_scopes import scope, scopes_disabled
 from i18nfield.strings import LazyI18nString
 
@@ -126,7 +126,7 @@ def mail(email: str, subject: str, template: Union[str, LazyI18nString],
         renderer = ClassicMailRenderer(None)
         content_plain = body_plain = render_mail(template, context)
         subject = str(subject).format_map(TolerantDict(context))
-        sender = sender or (event.settings.get('mail_from') if event else settings.MAIL_FROM)
+        sender = sender or (event.settings.get('mail_from') if event else settings.MAIL_FROM) or settings.MAIL_FROM
         if event:
             sender_name = event.settings.mail_from_name or str(event.name)
             sender = formataddr((sender_name, sender))
@@ -276,20 +276,6 @@ def mail_send_task(self, *args, to: List[str], subject: str, body: str, html: st
         cm = lambda: scopes_disabled()  # noqa
 
     with cm():
-        if invoices:
-            invoices = Invoice.objects.filter(pk__in=invoices)
-            for inv in invoices:
-                if inv.file:
-                    try:
-                        with language(inv.order.locale):
-                            email.attach(
-                                pgettext('invoice', 'Invoice {num}').format(num=inv.number).replace(' ', '_') + '.pdf',
-                                inv.file.file.read(),
-                                'application/pdf'
-                            )
-                    except:
-                        logger.exception('Could not attach invoice to email')
-                        pass
         if event:
             if order:
                 try:
@@ -344,6 +330,21 @@ def mail_send_task(self, *args, to: List[str], subject: str, body: str, html: st
 
             email = email_filter.send_chained(event, 'message', message=email, order=order, user=user)
 
+        if invoices:
+            invoices = Invoice.objects.filter(pk__in=invoices)
+            for inv in invoices:
+                if inv.file:
+                    try:
+                        with language(inv.order.locale):
+                            email.attach(
+                                pgettext('invoice', 'Invoice {num}').format(num=inv.number).replace(' ', '_') + '.pdf',
+                                inv.file.file.read(),
+                                'application/pdf'
+                            )
+                    except:
+                        logger.exception('Could not attach invoice to email')
+                        pass
+
         email = global_email_filter.send_chained(event, 'message', message=email, user=user, order=order)
 
         try:

src/pretix/base/services/notifications.py

@@ -1,5 +1,6 @@
 from django.conf import settings
 from django.template.loader import get_template
+from django.utils.timezone import override
 from django_scopes import scope, scopes_disabled
 from inlinestyler.utils import inline_css
 
@@ -79,7 +80,7 @@ def send_notification(logentry_id: int, action_type: str, user_id: int, method:
         if not notification_type:
             return  # Ignore, e.g. plugin not active for this event
 
-        with language(user.locale):
+        with language(user.locale), override(logentry.event.timezone if logentry.event else user.timezone):
             notification = notification_type.build_notification(logentry)
 
             if method == "mail":

src/pretix/base/services/orderimport.py

@@ -43,7 +43,11 @@ def parse_csv(file, length=None):
     if '\r' in data and '\n' not in data:
         data = data.replace('\r', '\n')
 
-    dialect = csv.Sniffer().sniff(data.split("\n")[0], delimiters=";,.#:")
+    try:
+        dialect = csv.Sniffer().sniff(data.split("\n")[0], delimiters=";,.#:")
+    except csv.Error:
+        return None
+
     if dialect is None:
         return None
 

src/pretix/base/services/orders.py

@@ -15,7 +15,7 @@ from django.db.transaction import get_connection
 from django.dispatch import receiver
 from django.utils.functional import cached_property
 from django.utils.timezone import make_aware, now
-from django.utils.translation import ugettext as _
+from django.utils.translation import gettext as _
 from django_scopes import scopes_disabled
 
 from pretix.api.models import OAuthApplication
@@ -94,6 +94,54 @@ def mark_order_paid(*args, **kwargs):
     raise NotImplementedError("This method is no longer supported since pretix 1.17.")
 
 
+def reactivate_order(order: Order, force: bool=False, user: User=None, auth=None):
+    """
+    Reactivates a canceled order. If ``force`` is not set to ``True``, this will fail if there is not
+    enough quota.
+    """
+    if order.status != Order.STATUS_CANCELED:
+        raise OrderError('The order was not canceled.')
+
+    with order.event.lock() as now_dt:
+        is_available = force or order._is_still_available(now_dt, count_waitinglist=False, check_voucher_usage=True)
+        if is_available is True:
+            if order.payment_refund_sum >= order.total:
+                order.status = Order.STATUS_PAID
+            else:
+                order.status = Order.STATUS_PENDING
+            order.cancellation_date = None
+            order.set_expires(now(),
+                              order.event.subevents.filter(id__in=[p.subevent_id for p in order.positions.all()]))
+            with transaction.atomic():
+                order.save(update_fields=['expires', 'status', 'cancellation_date'])
+                order.log_action(
+                    'pretix.event.order.reactivated',
+                    user=user,
+                    auth=auth,
+                    data={
+                        'expires': order.expires,
+                    }
+                )
+                for position in order.positions.all():
+                    if position.voucher:
+                        Voucher.objects.filter(pk=position.voucher.pk).update(redeemed=Greatest(0, F('redeemed') + 1))
+
+                    for gc in position.issued_gift_cards.all():
+                        gc = GiftCard.objects.select_for_update().get(pk=gc.pk)
+                        gc.transactions.create(value=position.price, order=order)
+                        break
+        else:
+            raise OrderError(is_available)
+
+    order_approved.send(order.event, order=order)
+    if order.status == Order.STATUS_PAID:
+        order_paid.send(order.event, order=order)
+
+    num_invoices = order.invoices.filter(is_cancellation=False).count()
+    if num_invoices > 0 and order.invoices.filter(is_cancellation=True).count() >= num_invoices and invoice_qualified(order):
+        generate_invoice(order)
+
+
 def extend_order(order: Order, new_date: datetime, force: bool=False, user: User=None, auth=None):
     """
     Extends the deadline of an order. If the order is already expired, the quota will be checked to
@@ -117,9 +165,10 @@ def extend_order(order: Order, new_date: datetime, force: bool=False, user: User
                 'state_change': was_expired
             }
         )
+
         if was_expired:
             num_invoices = order.invoices.filter(is_cancellation=False).count()
-            if num_invoices > 0 and order.invoices.filter(is_cancellation=True).count() >= num_invoices:
+            if num_invoices > 0 and order.invoices.filter(is_cancellation=True).count() >= num_invoices and invoice_qualified(order):
                 generate_invoice(order)
 
     if order.status == Order.STATUS_PENDING:
@@ -271,15 +320,16 @@ def deny_order(order, comment='', user=None, send_mail: bool=True, auth=None):
 
 
 def _cancel_order(order, user=None, send_mail: bool=True, api_token=None, device=None, oauth_application=None,
-                  cancellation_fee=None):
+                  cancellation_fee=None, keep_fees=None):
     """
     Mark this order as canceled
     :param order: The order to change
     :param user: The user that performed the change
     """
+    # If new actions are added to this function, make sure to add the reverse operation to reactivate_order()
     with transaction.atomic():
         if isinstance(order, int):
-            order = Order.objects.get(pk=order)
+            order = Order.objects.select_for_update().get(pk=order)
         if isinstance(user, int):
             user = User.objects.get(pk=user)
         if isinstance(api_token, int):
@@ -294,8 +344,8 @@ def _cancel_order(order, user=None, send_mail: bool=True, api_token=None, device
         if not order.cancel_allowed():
             raise OrderError(_('You cannot cancel this order.'))
         invoices = []
-        i = order.invoices.filter(is_cancellation=False, refered__isnull=True).last()
-        if i:
+        i = order.invoices.filter(is_cancellation=False).last()
+        if i and not i.refered.exists():
             invoices.append(generate_cancellation(i))
 
         for position in order.positions.all():
@@ -318,31 +368,38 @@ def _cancel_order(order, user=None, send_mail: bool=True, api_token=None, device
                         Voucher.objects.filter(pk=position.voucher.pk).update(redeemed=Greatest(0, F('redeemed') - 1))
                     position.canceled = True
                     position.save(update_fields=['canceled'])
+                new_fee = cancellation_fee
                 for fee in order.fees.all():
-                    fee.canceled = True
-                    fee.save(update_fields=['canceled'])
+                    if keep_fees and fee in keep_fees:
+                        new_fee -= fee.value
+                    else:
+                        fee.canceled = True
+                        fee.save(update_fields=['canceled'])
 
-                f = OrderFee(
-                    fee_type=OrderFee.FEE_TYPE_CANCELLATION,
-                    value=cancellation_fee,
-                    tax_rule=order.event.settings.tax_rate_default,
-                    order=order,
-                )
-                f._calculate_tax()
-                f.save()
+                if new_fee:
+                    f = OrderFee(
+                        fee_type=OrderFee.FEE_TYPE_CANCELLATION,
+                        value=new_fee,
+                        tax_rule=order.event.settings.tax_rate_default,
+                        order=order,
+                    )
+                    f._calculate_tax()
+                    f.save()
 
                 if order.payment_refund_sum < cancellation_fee:
                     raise OrderError(_('The cancellation fee cannot be higher than the payment credit of this order.'))
                 order.status = Order.STATUS_PAID
-                order.total = f.value
-                order.save(update_fields=['status', 'total'])
+                order.total = cancellation_fee
+                order.cancellation_date = now()
+                order.save(update_fields=['status', 'cancellation_date', 'total'])
 
             if i:
                 invoices.append(generate_invoice(order))
         else:
             with order.event.lock():
                 order.status = Order.STATUS_CANCELED
-                order.save(update_fields=['status'])
+                order.cancellation_date = now()
+                order.save(update_fields=['status', 'cancellation_date'])
 
             for position in order.positions.all():
                 if position.voucher:
@@ -350,6 +407,7 @@ def _cancel_order(order, user=None, send_mail: bool=True, api_token=None, device
 
         order.log_action('pretix.event.order.canceled', user=user, auth=api_token or oauth_application or device,
                          data={'cancellation_fee': cancellation_fee})
+        order.cancellation_requests.all().delete()
 
         if send_mail:
             email_template = order.event.settings.mail_text_order_canceled
@@ -553,6 +611,8 @@ def _check_positions(event: Event, now_dt: datetime, positions: List[CartPositio
                 bprice = bundle.designated_price or 0
             except ItemBundle.DoesNotExist:
                 bprice = cp.price
+            except ItemBundle.MultipleObjectsReturned:
+                raise OrderError("Invalid product configuration (duplicate bundle)")
             price = get_price(cp.item, cp.variation, cp.voucher, bprice, cp.subevent, custom_price_is_net=False,
                               invoice_address=address, force_custom_price=True, max_discount=max_discount)
             pbv = get_price(cp.item, cp.variation, None, bprice, cp.subevent, custom_price_is_net=False,
@@ -631,7 +691,7 @@ def _get_fees(positions: List[CartPosition], payment_provider: BasePaymentProvid
     total = sum([c.price for c in positions])
 
     for recv, resp in order_fee_calculation.send(sender=event, invoice_address=address, total=total,
-                                                 meta_info=meta_info, positions=positions):
+                                                 meta_info=meta_info, positions=positions, gift_cards=gift_cards):
         if resp:
             fees += resp
     total += sum(f.value for f in fees)
@@ -968,7 +1028,6 @@ def send_download_reminders(sender, **kwargs):
             F('event__date_from')
         )
     ).filter(
-        status=Order.STATUS_PAID,
         download_reminder_sent=False,
         datetime__lte=now() - timedelta(hours=2),
         first_date__gte=today,
@@ -998,6 +1057,22 @@ def send_download_reminders(sender, **kwargs):
             if not all([r for rr, r in allow_ticket_download.send(event, order=o)]):
                 continue
 
+            if not o.ticket_download_available:
+                continue
+            positions = o.positions.select_related('item')
+
+            if o.status != Order.STATUS_PAID:
+                if o.status != Order.STATUS_PENDING or o.require_approval or not \
+                        o.event.settings.ticket_download_pending:
+                    continue
+            send = False
+            for p in positions:
+                if p.generate_ticket:
+                    send = True
+                    break
+            if not send:
+                continue
+
             with language(o.locale):
                 o.download_reminder_sent = True
                 o.save(update_fields=['download_reminder_sent'])
@@ -1015,6 +1090,9 @@ def send_download_reminders(sender, **kwargs):
 
                 if event.settings.mail_send_download_reminder_attendee:
                     for p in o.positions.all():
+                        if not p.generate_ticket:
+                            continue
+
                         if p.subevent_id:
                             reminder_date = (p.subevent.date_from - timedelta(days=days)).replace(
                                 hour=0, minute=0, second=0, microsecond=0
@@ -1075,6 +1153,7 @@ class OrderChangeManager:
     AddOperation = namedtuple('AddOperation', ('item', 'variation', 'price', 'addon_to', 'subevent', 'seat'))
     SplitOperation = namedtuple('SplitOperation', ('position',))
     FeeValueOperation = namedtuple('FeeValueOperation', ('fee', 'value'))
+    AddFeeOperation = namedtuple('AddFeeOperation', ('fee',))
     CancelFeeOperation = namedtuple('CancelFeeOperation', ('fee',))
     RegenerateSecretOperation = namedtuple('RegenerateSecretOperation', ('position',))
 
@@ -1145,6 +1224,27 @@ class OrderChangeManager:
         self._quotadiff.subtract(position.quotas)
         self._operations.append(self.SubeventOperation(position, subevent))
 
+    def change_item_and_subevent(self, position: OrderPosition, item: Item, variation: Optional[ItemVariation],
+                                 subevent: SubEvent):
+        if (not variation and item.has_variations) or (variation and variation.item_id != item.pk):
+            raise OrderError(self.error_messages['product_without_variation'])
+
+        price = get_price(item, variation, voucher=position.voucher, subevent=subevent,
+                          invoice_address=self._invoice_address)
+
+        if price is None:  # NOQA
+            raise OrderError(self.error_messages['product_invalid'])
+
+        new_quotas = (variation.quotas.filter(subevent=subevent)
+                      if variation else item.quotas.filter(subevent=subevent))
+        if not new_quotas:
+            raise OrderError(self.error_messages['quota_missing'])
+
+        self._quotadiff.update(new_quotas)
+        self._quotadiff.subtract(position.quotas)
+        self._operations.append(self.ItemOperation(position, item, variation))
+        self._operations.append(self.SubeventOperation(position, subevent))
+
     def regenerate_secret(self, position: OrderPosition):
         self._operations.append(self.RegenerateSecretOperation(position))
 
@@ -1188,6 +1288,11 @@ class OrderChangeManager:
         self._operations.append(self.CancelFeeOperation(fee))
         self._invoice_dirty = True
 
+    def add_fee(self, fee: OrderFee):
+        self._totaldiff += fee.value
+        self._invoice_dirty = True
+        self._operations.append(self.AddFeeOperation(fee))
+
     def change_fee(self, fee: OrderFee, value: Decimal):
         value = (fee.tax_rule or TaxRule.zero()).tax(value, base_price_is='gross')
         self._totaldiff += value.gross - fee.value
@@ -1448,6 +1553,13 @@ class OrderChangeManager:
                             invoice_address=self._invoice_address
                         ).gross
                     )
+            elif isinstance(op, self.AddFeeOperation):
+                self.order.log_action('pretix.event.order.changed.addfee', user=self.user, auth=self.auth, data={
+                    'fee': op.fee.pk,
+                })
+                op.fee.order = self.order
+                op.fee._calculate_tax()
+                op.fee.save()
             elif isinstance(op, self.FeeValueOperation):
                 self.order.log_action('pretix.event.order.changed.feevalue', user=self.user, auth=self.auth, data={
                     'fee': op.fee.pk,
@@ -1710,7 +1822,8 @@ class OrderChangeManager:
         i = self.order.invoices.filter(is_cancellation=False).last()
         if self.reissue_invoice and i and self._invoice_dirty:
             self._invoices.append(generate_cancellation(i))
-            self._invoices.append(generate_invoice(self.order))
+            if invoice_qualified(self.order):
+                self._invoices.append(generate_invoice(self.order))
 
     def _check_complete_cancel(self):
         current = self.order.positions.count()
@@ -1800,61 +1913,132 @@ def perform_order(self, event: Event, payment_provider: str, positions: List[str
             raise OrderError(str(error_messages['busy']))
 
 
+_unset = object()
+
+
+def _try_auto_refund(order, manual_refund=False, allow_partial=False, source=OrderRefund.REFUND_SOURCE_BUYER,
+                     refund_as_giftcard=False, giftcard_expires=_unset, giftcard_conditions=None):
+    notify_admin = False
+    error = False
+    if isinstance(order, int):
+        order = Order.objects.get(pk=order)
+    refund_amount = order.pending_sum * -1
+    if refund_amount <= Decimal('0.00'):
+        return
+
+    if refund_as_giftcard:
+        proposals = {}
+        can_auto_refund = True
+        can_auto_refund_sum = refund_amount
+        with transaction.atomic():
+            giftcard = order.event.organizer.issued_gift_cards.create(
+                expires=order.event.organizer.default_gift_card_expiry if giftcard_expires is _unset else giftcard_expires,
+                conditions=giftcard_conditions,
+                currency=order.event.currency,
+                testmode=order.testmode
+            )
+            giftcard.log_action('pretix.giftcards.created', data={})
+            r = order.refunds.create(
+                order=order,
+                payment=None,
+                source=source,
+                state=OrderRefund.REFUND_STATE_CREATED,
+                execution_date=now(),
+                amount=can_auto_refund_sum,
+                provider='giftcard',
+                info=json.dumps({
+                    'gift_card': giftcard.pk
+                })
+            )
+            try:
+                r.payment_provider.execute_refund(r)
+            except PaymentException as e:
+                with transaction.atomic():
+                    r.state = OrderRefund.REFUND_STATE_FAILED
+                    r.save()
+                    order.log_action('pretix.event.order.refund.failed', {
+                        'local_id': r.local_id,
+                        'provider': r.provider,
+                        'error': str(e)
+                    })
+                error = True
+                notify_admin = True
+            else:
+                if r.state != OrderRefund.REFUND_STATE_DONE:
+                    notify_admin = True
+
+    else:
+        proposals = order.propose_auto_refunds(refund_amount)
+        can_auto_refund_sum = sum(proposals.values())
+        can_auto_refund = (allow_partial and can_auto_refund_sum) or can_auto_refund_sum == refund_amount
+    if can_auto_refund:
+        for p, value in proposals.items():
+            with transaction.atomic():
+                r = order.refunds.create(
+                    payment=p,
+                    source=source,
+                    state=OrderRefund.REFUND_STATE_CREATED,
+                    amount=value,
+                    provider=p.provider
+                )
+                order.log_action('pretix.event.order.refund.created', {
+                    'local_id': r.local_id,
+                    'provider': r.provider,
+                })
+
+            try:
+                r.payment_provider.execute_refund(r)
+            except PaymentException as e:
+                with transaction.atomic():
+                    r.state = OrderRefund.REFUND_STATE_FAILED
+                    r.save()
+                    order.log_action('pretix.event.order.refund.failed', {
+                        'local_id': r.local_id,
+                        'provider': r.provider,
+                        'error': str(e)
+                    })
+                error = True
+                notify_admin = True
+            else:
+                if r.state not in (OrderRefund.REFUND_STATE_TRANSIT, OrderRefund.REFUND_STATE_DONE):
+                    notify_admin = True
+
+    if refund_amount - can_auto_refund_sum > Decimal('0.00'):
+        if manual_refund:
+            with transaction.atomic():
+                r = order.refunds.create(
+                    source=source,
+                    state=OrderRefund.REFUND_STATE_CREATED,
+                    amount=refund_amount - can_auto_refund_sum,
+                    provider='manual'
+                )
+                order.log_action('pretix.event.order.refund.created', {
+                    'local_id': r.local_id,
+                    'provider': r.provider,
+                })
+        else:
+            notify_admin = True
+
+    if notify_admin:
+        order.log_action('pretix.event.order.refund.requested')
+    if error:
+        raise OrderError(
+            _(
+                'There was an error while trying to send the money back to you. Please contact the event organizer '
+                'for further information.')
+        )
+
+
 @app.task(base=ProfiledTask, bind=True, max_retries=5, default_retry_delay=1, throws=(OrderError,))
 @scopes_disabled()
 def cancel_order(self, order: int, user: int=None, send_mail: bool=True, api_token=None, oauth_application=None,
-                 device=None, cancellation_fee=None, try_auto_refund=False):
+                 device=None, cancellation_fee=None, try_auto_refund=False, refund_as_giftcard=False):
     try:
         try:
             ret = _cancel_order(order, user, send_mail, api_token, device, oauth_application,
                                 cancellation_fee)
             if try_auto_refund:
-                notify_admin = False
-                error = False
-                order = Order.objects.get(pk=order)
-                refund_amount = order.pending_sum * -1
-                proposals = order.propose_auto_refunds(refund_amount)
-                can_auto_refund = sum(proposals.values()) == refund_amount
-                if can_auto_refund:
-                    for p, value in proposals.items():
-                        with transaction.atomic():
-                            r = order.refunds.create(
-                                payment=p,
-                                source=OrderRefund.REFUND_SOURCE_BUYER,
-                                state=OrderRefund.REFUND_STATE_CREATED,
-                                amount=value,
-                                provider=p.provider
-                            )
-                            order.log_action('pretix.event.order.refund.created', {
-                                'local_id': r.local_id,
-                                'provider': r.provider,
-                            })
-
-                        try:
-                            r.payment_provider.execute_refund(r)
-                        except PaymentException as e:
-                            with transaction.atomic():
-                                r.state = OrderRefund.REFUND_STATE_FAILED
-                                r.save()
-                                order.log_action('pretix.event.order.refund.failed', {
-                                    'local_id': r.local_id,
-                                    'provider': r.provider,
-                                    'error': str(e)
-                                })
-                            error = True
-                            notify_admin = True
-                        else:
-                            if r.state != OrderRefund.REFUND_STATE_DONE:
-                                notify_admin = True
-                elif refund_amount != Decimal('0.00'):
-                    notify_admin = True
-
-                if notify_admin:
-                    order.log_action('pretix.event.order.refund.requested')
-                if error:
-                    raise OrderError(
-                        _('There was an error while trying to send the money back to you. Please contact the event organizer for further information.')
-                    )
+                _try_auto_refund(order, refund_as_giftcard=refund_as_giftcard)
             return ret
         except LockTimeoutException:
             self.retry()
@@ -1965,7 +2149,8 @@ def signal_listener_issue_giftcards(sender: Event, order: Order, **kwargs):
                 issued += gc.transactions.first().value
             if p.price - issued > 0:
                 gc = sender.organizer.issued_gift_cards.create(
-                    currency=sender.currency, issued_in=p, testmode=order.testmode
+                    currency=sender.currency, issued_in=p, testmode=order.testmode,
+                    expires=sender.organizer.default_gift_card_expiry,
                 )
                 gc.transactions.create(value=p.price - issued, order=order)
                 any_giftcards = True

src/pretix/base/services/seating.py

@@ -1,5 +1,5 @@
 from django.db.models import Count, Q
-from django.utils.translation import ugettext_lazy as _
+from django.utils.translation import gettext_lazy as _
 
 from pretix.base.i18n import LazyLocaleException
 from pretix.base.models import CartPosition, Seat
@@ -25,7 +25,7 @@ def validate_plan_change(event, subevent, plan):
             subevent=subevent,
         ).filter(
             Q(has_v=True) | Q(has_op=True)
-        ).values_list('seat_guid', flat=True)
+        ).values_list('seat_guid', flat=True).order_by()
     )
     new_seats = {
         ss.guid for ss in plan.iter_all_seats()
@@ -40,7 +40,7 @@ def generate_seats(event, subevent, plan, mapping):
     current_seats = {}
     for s in event.seats.select_related('product').annotate(
             has_op=Count('orderposition'), has_v=Count('vouchers')
-    ).filter(subevent=subevent):
+    ).filter(subevent=subevent).order_by():
         if s.seat_guid in current_seats:
             s.delete()  # Duplicates should not exist
         else:

src/pretix/base/services/shredder.py

@@ -8,7 +8,7 @@ from dateutil.parser import parse
 from django.conf import settings
 from django.utils.crypto import get_random_string
 from django.utils.timezone import now
-from django.utils.translation import ugettext_lazy as _
+from django.utils.translation import gettext_lazy as _
 
 from pretix.base.models import CachedFile, Event, cachedfile_name
 from pretix.base.services.tasks import ProfiledEventTask

src/pretix/base/services/stats.py

@@ -6,7 +6,7 @@ from django.db.models import (
     Case, Count, DateTimeField, F, Max, OuterRef, Subquery, Sum, Value, When,
 )
 from django.utils.timezone import make_aware
-from django.utils.translation import ugettext_lazy as _
+from django.utils.translation import gettext_lazy as _
 
 from pretix.base.models import Event, Item, ItemCategory, Order, OrderPosition
 from pretix.base.models.event import SubEvent