Bump to 2025.9.2

Hotfix linkified placeholders (#5663 )
* Fix linkify placeholders * Add URL test
2025-12-10 01:12:28 +00:00 · 2025-11-27 13:22:11 +01:00 · 2025-11-27 13:21:35 +01:00 · 2025-11-27 11:54:00 +01:00 · 2025-11-27 11:53:54 +01:00 · 2025-10-30 09:53:03 +01:00
981 changed files with 195323 additions and 142001 deletions
--- a/.licenseheader
+++ b/.licenseheader
@@ -1,7 +1,7 @@
 This file is part of pretix (Community Edition).

-Copyright (C) 2014-2020 Raphael Michel and contributors
-Copyright (C) 2020-2021 rami.io GmbH and contributors
+Copyright (C) 2014-2020  Raphael Michel and contributors
+Copyright (C) 2020-today pretix GmbH and contributors

 This program is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General
 Public License as published by the Free Software Foundation in version 3 of the License.
--- a/doc/api/resources/invoices.rst
+++ b/doc/api/resources/invoices.rst
@@ -80,17 +80,12 @@ lines                                 list of objects            The actual invo
                                                                 for all invoice lines
                                                                 created before this field was introduced as well as for
                                                                 all lines not created by a fee (e.g. a product).
-├ event_date_from                     datetime                   Start date of the (sub)event this line was created for as it
-                                                                 was set during invoice creation. Can be ``null`` for all invoice
-                                                                 lines created before this was introduced as well as for lines in
-                                                                 an event series not created by a product (e.g. shipping or
-                                                                 cancellation fees).
-├ event_date_to                       datetime                   End date of the (sub)event this line was created for as it
-                                                                 was set during invoice creation. Can be ``null`` for all invoice
-                                                                 lines created before this was introduced as well as for lines in
-                                                                 an event series not created by a product (e.g. shipping or
-                                                                 cancellation fees) as well as whenever the respective (sub)event
-                                                                 has no end date set.
+├ period_start                        datetime                   Start date of the service or delivery period of the invoice line.
+                                                                 Can be ``null`` if not known.
+├ period_end                          datetime                   End date of the service or delivery period of the invoice line.
+                                                                 Can be ``null`` if not known.
+├ event_date_from                     datetime                   Deprecated alias of ``period_start``.
+├ event_date_to                       datetime                   Deprecated alias of ``period_end``.
 ├ event_location                      string                     Location of the (sub)event this line was created for as it
                                                                 was set during invoice creation. Can be ``null`` for all invoice
                                                                 lines created before this was introduced as well as for lines in
@@ -163,10 +158,10 @@ transmission_email_address            string                     Optional. An em
                                                                 Business customers only.
 ===================================== ========================== =======================================================

-PEPPOL
+Peppol
 """"""

-The identifier ``"peppol"`` represents the transmission of XML invoices through the `PEPPOL`_ network.
+The identifier ``"peppol"`` represents the transmission of XML invoices through the `Peppol`_ network.
 This is only available for business addresses.
 This is not supported by pretix out of the box and requires the use of a suitable plugin.
 The ``transmission_info`` object may contain the following properties:
@@ -176,7 +171,7 @@ The ``transmission_info`` object may contain the following properties:
 ===================================== ========================== =======================================================
 Field                                 Type                       Description
 ===================================== ========================== =======================================================
-transmission_peppol_participant_id    string                     Required. The PEPPOL participant ID of the recipient.
+transmission_peppol_participant_id    string                     Required. The Peppol participant ID of the recipient.
 ===================================== ========================== =======================================================

 Italian Exchange System
@@ -274,6 +269,8 @@ List of all invoices
                "fee_internal_type": null,
                "event_date_from": "2017-12-27T10:00:00Z",
                "event_date_to": null,
+                "period_start": "2017-12-27T10:00:00Z",
+                "period_end": "2017-12-27T10:00:00Z",
                "event_location": "Heidelberg",
                "attendee_name": null,
                "gross_value": "23.00",
@@ -420,6 +417,8 @@ Fetching individual invoices
            "fee_internal_type": null,
            "event_date_from": "2017-12-27T10:00:00Z",
            "event_date_to": null,
+            "period_start": "2017-12-27T10:00:00Z",
+            "period_end": "2017-12-27T10:00:00Z",
            "event_location": "Heidelberg",
            "attendee_name": null,
            "gross_value": "23.00",
@@ -605,5 +604,5 @@ but in other cases transmission may need to be triggered manually.
   :statuscode 409: The invoice is currently in transmission


-.. _PEPPOL: https://en.wikipedia.org/wiki/PEPPOL
+.. _Peppol: https://en.wikipedia.org/wiki/PEPPOL
 .. _Sistema di Interscambio: https://it.wikipedia.org/wiki/Fattura_elettronica_in_Italia
--- a/doc/api/resources/orders.rst
+++ b/doc/api/resources/orders.rst
@@ -418,6 +418,7 @@ List of all orders
                "seat": null,
                "checkins": [
                  {
+                    "id": 1337,
                    "list": 44,
                    "type": "entry",
                    "gate": null,
@@ -662,6 +663,7 @@ Fetching individual orders
            "seat": null,
            "checkins": [
              {
+                "id": 1337,
                "list": 44,
                "type": "entry",
                "gate": null,
@@ -1028,8 +1030,8 @@ Creating orders
      * ``internal_reference``
      * ``vat_id``
      * ``vat_id_validated`` (optional) – If you need support for reverse charge (rarely the case), you need to check
-         yourself if the passed VAT ID is a valid EU VAT ID. In that case, set this to ``true``. Only valid VAT IDs will
-         trigger reverse charge taxation. Don't forget to set ``is_business`` as well!
+        yourself if the passed VAT ID is a valid EU VAT ID. In that case, set this to ``true``. Only valid VAT IDs will
+        trigger reverse charge taxation. Don't forget to set ``is_business`` as well!
     * ``transmission_type`` (optional, defaults to ``email``)
     * ``transmission_info`` (optional, see also :ref:`rest-transmission-types`)

@@ -1056,6 +1058,7 @@ Creating orders
      * ``valid_until`` (optional, if both ``valid_from`` and ``valid_until`` are **missing** (not ``null``) the availability will be computed from the given product)
      * ``requested_valid_from`` (optional, can be set **instead** of ``valid_from`` and ``valid_until`` to signal a user choice for the start time that may or may not be respected)
      * ``use_reusable_medium`` (optional, causes the new ticket to take over the given reusable medium, identified by its ID)
+      * ``discount`` (optional, only possible if ``price`` is set; attention: if this is set to not-``null`` on any position, automatic calculation of discounts will not run)
      * ``answers``

        * ``question``
@@ -1632,6 +1635,7 @@ List of all order positions
            "blocked": null,
            "checkins": [
              {
+                "id": 1337,
                "list": 44,
                "type": "entry",
                "gate": null,
@@ -1760,6 +1764,7 @@ Fetching individual positions
        "seat": null,
        "checkins": [
          {
+            "id": 1337,
            "list": 44,
            "type": "entry",
            "gate": null,
@@ -2504,6 +2509,7 @@ Order payment endpoints

      {
        "amount": "23.00",
+        "comment": "Overpayment",
        "mark_canceled": false
      }

--- a/doc/development/api/general.rst
+++ b/doc/development/api/general.rst
@@ -23,7 +23,7 @@ There are multiple signals that will be sent out in the ordering cycle:

 .. automodule:: pretix.base.signals
   :no-index:
-   :members: validate_cart, validate_cart_addons, validate_order, order_valid_if_pending, order_fee_calculation, order_paid, order_placed, order_canceled, order_reactivated, order_expired, order_expiry_changed, 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_valid_if_pending, order_fee_calculation, order_paid, order_placed, order_canceled, order_reactivated, order_expired, order_expiry_changed, order_modified, order_changed, order_approved, order_denied, order_fee_type_name, allow_ticket_download, order_split, order_gracefully_delete, build_invoice_data, invoice_line_text

 Check-ins
 """""""""
@@ -37,7 +37,7 @@ Frontend
 --------

 .. automodule:: pretix.presale.signals
-   :members: html_head, html_footer, footer_link, global_footer_link, front_page_top, front_page_bottom, front_page_bottom_widget, fee_calculation_for_cart, contact_form_fields, question_form_fields, contact_form_fields_overrides, question_form_fields_overrides, checkout_confirm_messages, checkout_confirm_page_content, checkout_all_optional, html_page_header, render_seating_plan, checkout_flow_steps, position_info, position_info_top, item_description, global_html_head, global_html_footer, global_html_page_header, seatingframe_html_head
+   :members: html_head, html_footer, footer_link, global_footer_link, front_page_top, front_page_bottom, front_page_bottom_widget, fee_calculation_for_cart, contact_form_fields, question_form_fields, contact_form_fields_overrides, question_form_fields_overrides, checkout_confirm_messages, checkout_confirm_page_content, checkout_all_optional, html_page_header, render_seating_plan, checkout_flow_steps, position_info, position_info_top, item_description, global_html_head, global_html_footer, global_html_page_header, seatingframe_html_head, filter_subevents


 .. automodule:: pretix.presale.signals
--- a/doc/requirements.rtd.txt
+++ b/doc/requirements.rtd.txt
@@ -6,4 +6,4 @@ sphinxcontrib-images
 sphinxcontrib-jquery
 sphinxcontrib-spelling==8.*
 sphinxemoji
-pyenchant==3.2.*
+pyenchant==3.3.*
--- a/doc/requirements.txt
+++ b/doc/requirements.txt
@@ -7,4 +7,4 @@ sphinxcontrib-images
 sphinxcontrib-jquery
 sphinxcontrib-spelling==8.*
 sphinxemoji
-pyenchant==3.2.*
+pyenchant==3.3.*
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -28,23 +28,23 @@ classifiers = [
 dependencies = [
  "arabic-reshaper==3.0.0",  # Support for Arabic in reportlab
  "babel",
-  "BeautifulSoup4==4.13.*",
+  "BeautifulSoup4==4.14.*",
  "bleach==6.2.*",
  "celery==5.5.*",
  "chardet==5.2.*",
  "cryptography>=44.0.0",
  "css-inline==0.17.*",
  "defusedcsv>=1.1.0",
-  "Django[argon2]==4.2.*,>=4.2.15",
+  "Django[argon2]==4.2.*,>=4.2.24",
  "django-bootstrap3==25.2",
  "django-compressor==4.5.1",
  "django-countries==7.6.*",
  "django-filter==25.1",
-  "django-formset-js-improved==0.5.0.3",
+  "django-formset-js-improved==0.5.0.4",
  "django-formtools==2.5.1",
-  "django-hierarkey==2.0.*",
+  "django-hierarkey==2.0.*,>=2.0.1",
  "django-hijack==3.7.*",
-  "django-i18nfield==1.10.*",
+  "django-i18nfield==1.11.*",
  "django-libsass==0.9",
  "django-localflavor==5.0",
  "django-markup",
@@ -64,7 +64,7 @@ dependencies = [
  "kombu==5.5.*",
  "libsass==0.23.*",
  "lxml",
-  "markdown==3.8.2",  # 3.3.5 requires importlib-metadata>=4.4, but django-bootstrap3 requires importlib-metadata<3.
+  "markdown==3.9",  # 3.3.5 requires importlib-metadata>=4.4, but django-bootstrap3 requires importlib-metadata<3.
  # We can upgrade markdown again once django-bootstrap3 upgrades or once we drop Python 3.6 and 3.7
  "mt-940==4.30.*",
  "oauthlib==3.3.*",
@@ -76,12 +76,12 @@ dependencies = [
  "phonenumberslite==9.0.*",
  "Pillow==11.3.*",
  "pretix-plugin-build",
-  "protobuf==6.32.*",
+  "protobuf==6.33.*",
  "psycopg2-binary",
  "pycountry",
-  "pycparser==2.22",
+  "pycparser==2.23",
  "pycryptodome==3.23.*",
-  "pypdf==6.0.*",
+  "pypdf==6.1.*",
  "python-bidi==0.6.*",  # Support for Arabic in reportlab
  "python-dateutil==2.9.*",
  "pytz",
@@ -90,9 +90,9 @@ dependencies = [
  "qrcode==8.2",
  "redis==6.4.*",
  "reportlab==4.4.*",
-  "requests==2.31.*",
-  "sentry-sdk==2.35.*",
-  "sepaxml==2.6.*",
+  "requests==2.32.*",
+  "sentry-sdk==2.42.*",
+  "sepaxml==2.7.*",
  "stripe==7.9.*",
  "text-unidecode==1.*",
  "tlds>=2020041600",
@@ -100,27 +100,27 @@ dependencies = [
  "ua-parser==1.0.*",
  "vat_moss_forked==2020.3.20.0.11.0",
  "vobject==0.9.*",
-  "webauthn==2.6.*",
+  "webauthn==2.7.*",
  "zeep==4.3.*"
 ]

 [project.optional-dependencies]
 memcached = ["pylibmc"]
 dev = [
-  "aiohttp==3.12.*",
+  "aiohttp==3.13.*",
  "coverage",
  "coveralls",
-  "fakeredis==2.31.*",
+  "fakeredis==2.32.*",
  "flake8==7.3.*",
  "freezegun",
-  "isort==6.0.*",
+  "isort==6.1.*",
  "pep8-naming==0.15.*",
  "potypo",
  "pytest-asyncio>=0.24",
  "pytest-cache",
  "pytest-cov",
  "pytest-django==4.*",
-  "pytest-mock==3.14.*",
+  "pytest-mock==3.15.*",
  "pytest-sugar",
  "pytest-xdist==3.8.*",
  "pytest==8.4.*",
--- a/src/Makefile
+++ b/src/Makefile
@@ -25,8 +25,8 @@ coverage:
 	coverage run -m py.test

 npminstall:
-	# keep this in sync with setup.py!
+	# keep this in sync with pretix/_build.py!
 	mkdir -p pretix/static.dist/node_prefix/
 	cp -r pretix/static/npm_dir/* pretix/static.dist/node_prefix/
-	npm install --prefix=pretix/static.dist/node_prefix
+	npm ci --prefix=pretix/static.dist/node_prefix

--- a/src/manage.py
+++ b/src/manage.py
@@ -2,8 +2,8 @@
 #
 # This file is part of pretix (Community Edition).
 #
-# Copyright (C) 2014-2020 Raphael Michel and contributors
-# Copyright (C) 2020-2021 rami.io GmbH and contributors
+# Copyright (C) 2014-2020  Raphael Michel and contributors
+# Copyright (C) 2020-today pretix GmbH and contributors
 #
 # This program is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General
 # Public License as published by the Free Software Foundation in version 3 of the License.
--- a/src/pretix/init.py
+++ b/src/pretix/init.py
@@ -1,8 +1,8 @@
 #
 # This file is part of pretix (Community Edition).
 #
-# Copyright (C) 2014-2020 Raphael Michel and contributors
-# Copyright (C) 2020-2021 rami.io GmbH and contributors
+# Copyright (C) 2014-2020  Raphael Michel and contributors
+# Copyright (C) 2020-today pretix GmbH and contributors
 #
 # This program is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General
 # Public License as published by the Free Software Foundation in version 3 of the License.
@@ -19,4 +19,4 @@
 # You should have received a copy of the GNU Affero General Public License along with this program.  If not, see
 # <https://www.gnu.org/licenses/>.
 #
-__version__ = "2025.8.0.dev0"
+__version__ = "2025.9.2"
--- a/src/pretix/main.py
+++ b/src/pretix/main.py
@@ -1,8 +1,8 @@
 #
 # This file is part of pretix (Community Edition).
 #
-# Copyright (C) 2014-2020 Raphael Michel and contributors
-# Copyright (C) 2020-2021 rami.io GmbH and contributors
+# Copyright (C) 2014-2020  Raphael Michel and contributors
+# Copyright (C) 2020-today pretix GmbH and contributors
 #
 # This program is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General
 # Public License as published by the Free Software Foundation in version 3 of the License.
--- a/src/pretix/_base_settings.py
+++ b/src/pretix/_base_settings.py
@@ -1,8 +1,8 @@
 #
 # This file is part of pretix (Community Edition).
 #
-# Copyright (C) 2014-2020 Raphael Michel and contributors
-# Copyright (C) 2020-2021 rami.io GmbH and contributors
+# Copyright (C) 2014-2020  Raphael Michel and contributors
+# Copyright (C) 2020-today pretix GmbH and contributors
 #
 # This program is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General
 # Public License as published by the Free Software Foundation in version 3 of the License.
--- a/src/pretix/_build.py
+++ b/src/pretix/_build.py
@@ -1,8 +1,8 @@
 #
 # This file is part of pretix (Community Edition).
 #
-# Copyright (C) 2014-2020 Raphael Michel and contributors
-# Copyright (C) 2020-2021 rami.io GmbH and contributors
+# Copyright (C) 2014-2020  Raphael Michel and contributors
+# Copyright (C) 2020-today pretix GmbH and contributors
 #
 # This program is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General
 # Public License as published by the Free Software Foundation in version 3 of the License.
@@ -39,7 +39,7 @@ def npm_install():
        node_prefix = os.path.join(here, 'static.dist', 'node_prefix')
        os.makedirs(node_prefix, exist_ok=True)
        shutil.copytree(os.path.join(here, 'static', 'npm_dir'), node_prefix, dirs_exist_ok=True)
-        subprocess.check_call('npm install', shell=True, cwd=node_prefix)
+        subprocess.check_call('npm ci', shell=True, cwd=node_prefix)
        npm_installed = True


--- a/src/pretix/_build_settings.py
+++ b/src/pretix/_build_settings.py
@@ -1,8 +1,8 @@
 #
 # This file is part of pretix (Community Edition).
 #
-# Copyright (C) 2014-2020 Raphael Michel and contributors
-# Copyright (C) 2020-2021 rami.io GmbH and contributors
+# Copyright (C) 2014-2020  Raphael Michel and contributors
+# Copyright (C) 2020-today pretix GmbH and contributors
 #
 # This program is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General
 # Public License as published by the Free Software Foundation in version 3 of the License.
--- a/src/pretix/api/init.py
+++ b/src/pretix/api/init.py
@@ -1,8 +1,8 @@
 #
 # This file is part of pretix (Community Edition).
 #
-# Copyright (C) 2014-2020 Raphael Michel and contributors
-# Copyright (C) 2020-2021 rami.io GmbH and contributors
+# Copyright (C) 2014-2020  Raphael Michel and contributors
+# Copyright (C) 2020-today pretix GmbH and contributors
 #
 # This program is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General
 # Public License as published by the Free Software Foundation in version 3 of the License.
--- a/src/pretix/api/apps.py
+++ b/src/pretix/api/apps.py
@@ -1,8 +1,8 @@
 #
 # This file is part of pretix (Community Edition).
 #
-# Copyright (C) 2014-2020 Raphael Michel and contributors
-# Copyright (C) 2020-2021 rami.io GmbH and contributors
+# Copyright (C) 2014-2020  Raphael Michel and contributors
+# Copyright (C) 2020-today pretix GmbH and contributors
 #
 # This program is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General
 # Public License as published by the Free Software Foundation in version 3 of the License.
--- a/src/pretix/api/auth/init.py
+++ b/src/pretix/api/auth/init.py
@@ -1,8 +1,8 @@
 #
 # This file is part of pretix (Community Edition).
 #
-# Copyright (C) 2014-2020 Raphael Michel and contributors
-# Copyright (C) 2020-2021 rami.io GmbH and contributors
+# Copyright (C) 2014-2020  Raphael Michel and contributors
+# Copyright (C) 2020-today pretix GmbH and contributors
 #
 # This program is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General
 # Public License as published by the Free Software Foundation in version 3 of the License.
--- a/src/pretix/api/auth/device.py
+++ b/src/pretix/api/auth/device.py
@@ -1,8 +1,8 @@
 #
 # This file is part of pretix (Community Edition).
 #
-# Copyright (C) 2014-2020 Raphael Michel and contributors
-# Copyright (C) 2020-2021 rami.io GmbH and contributors
+# Copyright (C) 2014-2020  Raphael Michel and contributors
+# Copyright (C) 2020-today pretix GmbH and contributors
 #
 # This program is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General
 # Public License as published by the Free Software Foundation in version 3 of the License.
--- a/src/pretix/api/auth/devicesecurity.py
+++ b/src/pretix/api/auth/devicesecurity.py
@@ -1,8 +1,8 @@
 #
 # This file is part of pretix (Community Edition).
 #
-# Copyright (C) 2014-2020 Raphael Michel and contributors
-# Copyright (C) 2020-2021 rami.io GmbH and contributors
+# Copyright (C) 2014-2020  Raphael Michel and contributors
+# Copyright (C) 2020-today pretix GmbH and contributors
 #
 # This program is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General
 # Public License as published by the Free Software Foundation in version 3 of the License.
--- a/src/pretix/api/auth/permission.py
+++ b/src/pretix/api/auth/permission.py
@@ -1,8 +1,8 @@
 #
 # This file is part of pretix (Community Edition).
 #
-# Copyright (C) 2014-2020 Raphael Michel and contributors
-# Copyright (C) 2020-2021 rami.io GmbH and contributors
+# Copyright (C) 2014-2020  Raphael Michel and contributors
+# Copyright (C) 2020-today pretix GmbH and contributors
 #
 # This program is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General
 # Public License as published by the Free Software Foundation in version 3 of the License.
--- a/src/pretix/api/auth/session.py
+++ b/src/pretix/api/auth/session.py
@@ -1,8 +1,8 @@
 #
 # This file is part of pretix (Community Edition).
 #
-# Copyright (C) 2014-2020 Raphael Michel and contributors
-# Copyright (C) 2020-2021 rami.io GmbH and contributors
+# Copyright (C) 2014-2020  Raphael Michel and contributors
+# Copyright (C) 2020-today pretix GmbH and contributors
 #
 # This program is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General
 # Public License as published by the Free Software Foundation in version 3 of the License.
--- a/src/pretix/api/auth/token.py
+++ b/src/pretix/api/auth/token.py
@@ -1,8 +1,8 @@
 #
 # This file is part of pretix (Community Edition).
 #
-# Copyright (C) 2014-2020 Raphael Michel and contributors
-# Copyright (C) 2020-2021 rami.io GmbH and contributors
+# Copyright (C) 2014-2020  Raphael Michel and contributors
+# Copyright (C) 2020-today pretix GmbH and contributors
 #
 # This program is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General
 # Public License as published by the Free Software Foundation in version 3 of the License.
--- a/src/pretix/api/exception.py
+++ b/src/pretix/api/exception.py
@@ -1,8 +1,8 @@
 #
 # This file is part of pretix (Community Edition).
 #
-# Copyright (C) 2014-2020 Raphael Michel and contributors
-# Copyright (C) 2020-2021 rami.io GmbH and contributors
+# Copyright (C) 2014-2020  Raphael Michel and contributors
+# Copyright (C) 2020-today pretix GmbH and contributors
 #
 # This program is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General
 # Public License as published by the Free Software Foundation in version 3 of the License.
--- a/src/pretix/api/filters.py
+++ b/src/pretix/api/filters.py
@@ -1,8 +1,8 @@
 #
 # This file is part of pretix (Community Edition).
 #
-# Copyright (C) 2014-2020 Raphael Michel and contributors
-# Copyright (C) 2020-2021 rami.io GmbH and contributors
+# Copyright (C) 2014-2020  Raphael Michel and contributors
+# Copyright (C) 2020-today pretix GmbH and contributors
 #
 # This program is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General
 # Public License as published by the Free Software Foundation in version 3 of the License.
--- a/src/pretix/api/middleware.py
+++ b/src/pretix/api/middleware.py
@@ -1,8 +1,8 @@
 #
 # This file is part of pretix (Community Edition).
 #
-# Copyright (C) 2014-2020 Raphael Michel and contributors
-# Copyright (C) 2020-2021 rami.io GmbH and contributors
+# Copyright (C) 2014-2020  Raphael Michel and contributors
+# Copyright (C) 2020-today pretix GmbH and contributors
 #
 # This program is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General
 # Public License as published by the Free Software Foundation in version 3 of the License.
--- a/src/pretix/api/models.py
+++ b/src/pretix/api/models.py
@@ -1,8 +1,8 @@
 #
 # This file is part of pretix (Community Edition).
 #
-# Copyright (C) 2014-2020 Raphael Michel and contributors
-# Copyright (C) 2020-2021 rami.io GmbH and contributors
+# Copyright (C) 2014-2020  Raphael Michel and contributors
+# Copyright (C) 2020-today pretix GmbH and contributors
 #
 # This program is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General
 # Public License as published by the Free Software Foundation in version 3 of the License.
--- a/src/pretix/api/oauth.py
+++ b/src/pretix/api/oauth.py
@@ -1,8 +1,8 @@
 #
 # This file is part of pretix (Community Edition).
 #
-# Copyright (C) 2014-2020 Raphael Michel and contributors
-# Copyright (C) 2020-2021 rami.io GmbH and contributors
+# Copyright (C) 2014-2020  Raphael Michel and contributors
+# Copyright (C) 2020-today pretix GmbH and contributors
 #
 # This program is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General
 # Public License as published by the Free Software Foundation in version 3 of the License.
--- a/src/pretix/api/pagination.py
+++ b/src/pretix/api/pagination.py
@@ -1,8 +1,8 @@
 #
 # This file is part of pretix (Community Edition).
 #
-# Copyright (C) 2014-2020 Raphael Michel and contributors
-# Copyright (C) 2020-2021 rami.io GmbH and contributors
+# Copyright (C) 2014-2020  Raphael Michel and contributors
+# Copyright (C) 2020-today pretix GmbH and contributors
 #
 # This program is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General
 # Public License as published by the Free Software Foundation in version 3 of the License.
--- a/src/pretix/api/serializers/init.py
+++ b/src/pretix/api/serializers/init.py
@@ -1,8 +1,8 @@
 #
 # This file is part of pretix (Community Edition).
 #
-# Copyright (C) 2014-2020 Raphael Michel and contributors
-# Copyright (C) 2020-2021 rami.io GmbH and contributors
+# Copyright (C) 2014-2020  Raphael Michel and contributors
+# Copyright (C) 2020-today pretix GmbH and contributors
 #
 # This program is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General
 # Public License as published by the Free Software Foundation in version 3 of the License.
--- a/src/pretix/api/serializers/cart.py
+++ b/src/pretix/api/serializers/cart.py
@@ -1,8 +1,8 @@
 #
 # This file is part of pretix (Community Edition).
 #
-# Copyright (C) 2014-2020 Raphael Michel and contributors
-# Copyright (C) 2020-2021 rami.io GmbH and contributors
+# Copyright (C) 2014-2020  Raphael Michel and contributors
+# Copyright (C) 2020-today pretix GmbH and contributors
 #
 # This program is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General
 # Public License as published by the Free Software Foundation in version 3 of the License.
--- a/src/pretix/api/serializers/checkin.py
+++ b/src/pretix/api/serializers/checkin.py
@@ -1,8 +1,8 @@
 #
 # This file is part of pretix (Community Edition).
 #
-# Copyright (C) 2014-2020 Raphael Michel and contributors
-# Copyright (C) 2020-2021 rami.io GmbH and contributors
+# Copyright (C) 2014-2020  Raphael Michel and contributors
+# Copyright (C) 2020-today pretix GmbH and contributors
 #
 # This program is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General
 # Public License as published by the Free Software Foundation in version 3 of the License.
--- a/src/pretix/api/serializers/discount.py
+++ b/src/pretix/api/serializers/discount.py
@@ -1,8 +1,8 @@
 #
 # This file is part of pretix (Community Edition).
 #
-# Copyright (C) 2014-2020 Raphael Michel and contributors
-# Copyright (C) 2020-2021 rami.io GmbH and contributors
+# Copyright (C) 2014-2020  Raphael Michel and contributors
+# Copyright (C) 2020-today pretix GmbH and contributors
 #
 # This program is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General
 # Public License as published by the Free Software Foundation in version 3 of the License.
--- a/src/pretix/api/serializers/event.py
+++ b/src/pretix/api/serializers/event.py
@@ -1,8 +1,8 @@
 #
 # This file is part of pretix (Community Edition).
 #
-# Copyright (C) 2014-2020 Raphael Michel and contributors
-# Copyright (C) 2020-2021 rami.io GmbH and contributors
+# Copyright (C) 2014-2020  Raphael Michel and contributors
+# Copyright (C) 2020-today pretix GmbH and contributors
 #
 # This program is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General
 # Public License as published by the Free Software Foundation in version 3 of the License.
@@ -805,6 +805,7 @@ class EventSettingsSerializer(SettingsSerializer):
        'invoice_reissue_after_modify',
        'invoice_include_free',
        'invoice_generate',
+        'invoice_period',
        'invoice_numbers_consecutive',
        'invoice_numbers_prefix',
        'invoice_numbers_prefix_cancellations',
--- a/src/pretix/api/serializers/exporters.py
+++ b/src/pretix/api/serializers/exporters.py
@@ -1,8 +1,8 @@
 #
 # This file is part of pretix (Community Edition).
 #
-# Copyright (C) 2014-2020 Raphael Michel and contributors
-# Copyright (C) 2020-2021 rami.io GmbH and contributors
+# Copyright (C) 2014-2020  Raphael Michel and contributors
+# Copyright (C) 2020-today pretix GmbH and contributors
 #
 # This program is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General
 # Public License as published by the Free Software Foundation in version 3 of the License.
--- a/src/pretix/api/serializers/fields.py
+++ b/src/pretix/api/serializers/fields.py
@@ -1,8 +1,8 @@
 #
 # This file is part of pretix (Community Edition).
 #
-# Copyright (C) 2014-2020 Raphael Michel and contributors
-# Copyright (C) 2020-2021 rami.io GmbH and contributors
+# Copyright (C) 2014-2020  Raphael Michel and contributors
+# Copyright (C) 2020-today pretix GmbH and contributors
 #
 # This program is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General
 # Public License as published by the Free Software Foundation in version 3 of the License.
--- a/src/pretix/api/serializers/forms.py
+++ b/src/pretix/api/serializers/forms.py
@@ -1,8 +1,8 @@
 #
 # This file is part of pretix (Community Edition).
 #
-# Copyright (C) 2014-2020 Raphael Michel and contributors
-# Copyright (C) 2020-2021 rami.io GmbH and contributors
+# Copyright (C) 2014-2020  Raphael Michel and contributors
+# Copyright (C) 2020-today pretix GmbH and contributors
 #
 # This program is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General
 # Public License as published by the Free Software Foundation in version 3 of the License.
--- a/src/pretix/api/serializers/i18n.py
+++ b/src/pretix/api/serializers/i18n.py
@@ -1,8 +1,8 @@
 #
 # This file is part of pretix (Community Edition).
 #
-# Copyright (C) 2014-2020 Raphael Michel and contributors
-# Copyright (C) 2020-2021 rami.io GmbH and contributors
+# Copyright (C) 2014-2020  Raphael Michel and contributors
+# Copyright (C) 2020-today pretix GmbH and contributors
 #
 # This program is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General
 # Public License as published by the Free Software Foundation in version 3 of the License.
--- a/src/pretix/api/serializers/item.py
+++ b/src/pretix/api/serializers/item.py
@@ -1,8 +1,8 @@
 #
 # This file is part of pretix (Community Edition).
 #
-# Copyright (C) 2014-2020 Raphael Michel and contributors
-# Copyright (C) 2020-2021 rami.io GmbH and contributors
+# Copyright (C) 2014-2020  Raphael Michel and contributors
+# Copyright (C) 2020-today pretix GmbH and contributors
 #
 # This program is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General
 # Public License as published by the Free Software Foundation in version 3 of the License.
@@ -550,7 +550,7 @@ class QuestionSerializer(I18nAwareModelSerializer):
        if full_data.get('show_during_checkin') and full_data.get('type') in Question.SHOW_DURING_CHECKIN_UNSUPPORTED:
            raise ValidationError(_('This type of question cannot be shown during check-in.'))

-        Question.clean_items(event, full_data.get('items'))
+        Question.clean_items(event, full_data.get('items') or [])
        return data

    def validate_options(self, value):
@@ -566,7 +566,7 @@ class QuestionSerializer(I18nAwareModelSerializer):
    @transaction.atomic
    def create(self, validated_data):
        options_data = validated_data.pop('options') if 'options' in validated_data else []
-        items = validated_data.pop('items')
+        items = validated_data.pop('items', [])

        question = Question.objects.create(**validated_data)
        question.items.set(items)
--- a/src/pretix/api/serializers/media.py
+++ b/src/pretix/api/serializers/media.py
@@ -1,8 +1,8 @@
 #
 # This file is part of pretix (Community Edition).
 #
-# Copyright (C) 2014-2020 Raphael Michel and contributors
-# Copyright (C) 2020-2021 rami.io GmbH and contributors
+# Copyright (C) 2014-2020  Raphael Michel and contributors
+# Copyright (C) 2020-today pretix GmbH and contributors
 #
 # This program is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General
 # Public License as published by the Free Software Foundation in version 3 of the License.
--- a/src/pretix/api/serializers/order.py
+++ b/src/pretix/api/serializers/order.py
@@ -1,8 +1,8 @@
 #
 # This file is part of pretix (Community Edition).
 #
-# Copyright (C) 2014-2020 Raphael Michel and contributors
-# Copyright (C) 2020-2021 rami.io GmbH and contributors
+# Copyright (C) 2014-2020  Raphael Michel and contributors
+# Copyright (C) 2020-today pretix GmbH and contributors
 #
 # This program is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General
 # Public License as published by the Free Software Foundation in version 3 of the License.
@@ -1005,7 +1005,7 @@ class OrderPositionCreateSerializer(I18nAwareModelSerializer):
        fields = ('positionid', 'item', 'variation', 'price', 'attendee_name', 'attendee_name_parts', 'attendee_email',
                  'company', 'street', 'zipcode', 'city', 'country', 'state', 'is_bundled',
                  'secret', 'addon_to', 'subevent', 'answers', 'seat', 'voucher', 'valid_from', 'valid_until',
-                  'requested_valid_from', 'use_reusable_medium')
+                  'requested_valid_from', 'use_reusable_medium', 'discount')

    def __init__(self, *args, **kwargs):
        super().__init__(*args, **kwargs)
@@ -1101,6 +1101,10 @@ class OrderPositionCreateSerializer(I18nAwareModelSerializer):
                    {'state': ['"{}" is not a known subdivision of the country "{}".'.format(data.get('state'), cc)]}
                )

+        if data.get('price') is None and data.get('discount'):
+            raise ValidationError(
+                {'discount': ['You can only specify a discount if you do the price computation, but price is not set.']}
+            )
        return data


@@ -1160,6 +1164,7 @@ class OrderCreateSerializer(I18nAwareModelSerializer):
    def __init__(self, *args, **kwargs):
        super().__init__(*args, **kwargs)
        self.fields['positions'].child.fields['voucher'].queryset = self.context['event'].vouchers.all()
+        self.fields['positions'].child.fields['discount'].queryset = self.context['event'].discounts.all()
        self.fields['customer'].queryset = self.context['event'].organizer.customers.all()
        self.fields['expires'].required = False
        self.fields["sales_channel"].queryset = self.context["event"].organizer.sales_channels.all()
@@ -1567,19 +1572,22 @@ class OrderCreateSerializer(I18nAwareModelSerializer):
                pos.voucher_budget_use = max(listed_price - price_after_voucher, Decimal('0.00'))

        order_positions = [pos_data['__instance'] for pos_data in positions_data]
-        discount_results = apply_discounts(
-            self.context['event'],
-            order.sales_channel,
-            [
-                (cp.item_id, cp.subevent_id, cp.subevent.date_from if cp.subevent_id else None, cp.price,
-                 bool(cp.addon_to), cp.is_bundled, pos._voucher_discount)
-                for cp in order_positions
-            ]
-        )
-        for cp, (new_price, discount) in zip(order_positions, discount_results):
-            if new_price != pos.price and pos._auto_generated_price:
-                pos.price = new_price
-            pos.discount = discount
+        if not any([p.get("discount") for p in positions_data]):
+            # If any discount is set by the client (i.e. pretixPOS), we do not recalculate but believe the client
+            # to avoid differences in end results.
+            discount_results = apply_discounts(
+                self.context['event'],
+                order.sales_channel,
+                [
+                    (cp.item_id, cp.subevent_id, cp.subevent.date_from if cp.subevent_id else None, cp.price,
+                     bool(cp.addon_to), cp.is_bundled, pos._voucher_discount)
+                    for cp in order_positions
+                ]
+            )
+            for cp, (new_price, discount) in zip(order_positions, discount_results):
+                if new_price != pos.price and pos._auto_generated_price:
+                    pos.price = new_price
+                pos.discount = discount

        # Save instances
        for pos_data in positions_data:
@@ -1757,12 +1765,14 @@ class LinePositionField(serializers.IntegerField):

 class InlineInvoiceLineSerializer(I18nAwareModelSerializer):
    position = LinePositionField(read_only=True)
+    event_date_from = serializers.DateTimeField(read_only=True, source="period_start")
+    event_date_to = serializers.DateTimeField(read_only=True, source="period_end")

    class Meta:
        model = InvoiceLine
        fields = ('position', 'description', 'item', 'variation', 'subevent', 'attendee_name', 'event_date_from',
-                  'event_date_to', 'gross_value', 'tax_value', 'tax_rate', 'tax_code', 'tax_name', 'fee_type',
-                  'fee_internal_type', 'event_location')
+                  'event_date_to', 'period_start', 'period_end', 'gross_value', 'tax_value', 'tax_rate', 'tax_code',
+                  'tax_name', 'fee_type', 'fee_internal_type', 'event_location')


 class InvoiceSerializer(I18nAwareModelSerializer):
--- a/src/pretix/api/serializers/orderchange.py
+++ b/src/pretix/api/serializers/orderchange.py
@@ -1,8 +1,8 @@
 #
 # This file is part of pretix (Community Edition).
 #
-# Copyright (C) 2014-2020 Raphael Michel and contributors
-# Copyright (C) 2020-2021 rami.io GmbH and contributors
+# Copyright (C) 2014-2020  Raphael Michel and contributors
+# Copyright (C) 2020-today pretix GmbH and contributors
 #
 # This program is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General
 # Public License as published by the Free Software Foundation in version 3 of the License.
--- a/src/pretix/api/serializers/organizer.py
+++ b/src/pretix/api/serializers/organizer.py
@@ -1,8 +1,8 @@
 #
 # This file is part of pretix (Community Edition).
 #
-# Copyright (C) 2014-2020 Raphael Michel and contributors
-# Copyright (C) 2020-2021 rami.io GmbH and contributors
+# Copyright (C) 2014-2020  Raphael Michel and contributors
+# Copyright (C) 2020-today pretix GmbH and contributors
 #
 # This program is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General
 # Public License as published by the Free Software Foundation in version 3 of the License.
@@ -484,6 +484,7 @@ class OrganizerSettingsSerializer(SettingsSerializer):
        'reusable_media_type_nfc_mf0aes',
        'reusable_media_type_nfc_mf0aes_autocreate_giftcard',
        'reusable_media_type_nfc_mf0aes_autocreate_giftcard_currency',
+        'reusable_media_type_nfc_mf0aes_random_uid',
    ]

    def __init__(self, *args, **kwargs):
--- a/src/pretix/api/serializers/settings.py
+++ b/src/pretix/api/serializers/settings.py
@@ -1,8 +1,8 @@
 #
 # This file is part of pretix (Community Edition).
 #
-# Copyright (C) 2014-2020 Raphael Michel and contributors
-# Copyright (C) 2020-2021 rami.io GmbH and contributors
+# Copyright (C) 2014-2020  Raphael Michel and contributors
+# Copyright (C) 2020-today pretix GmbH and contributors
 #
 # This program is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General
 # Public License as published by the Free Software Foundation in version 3 of the License.
--- a/src/pretix/api/serializers/shredders.py
+++ b/src/pretix/api/serializers/shredders.py
@@ -1,8 +1,8 @@
 #
 # This file is part of pretix (Community Edition).
 #
-# Copyright (C) 2014-2020 Raphael Michel and contributors
-# Copyright (C) 2020-2021 rami.io GmbH and contributors
+# Copyright (C) 2014-2020  Raphael Michel and contributors
+# Copyright (C) 2020-today pretix GmbH and contributors
 #
 # This program is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General
 # Public License as published by the Free Software Foundation in version 3 of the License.
--- a/src/pretix/api/serializers/voucher.py
+++ b/src/pretix/api/serializers/voucher.py
@@ -1,8 +1,8 @@
 #
 # This file is part of pretix (Community Edition).
 #
-# Copyright (C) 2014-2020 Raphael Michel and contributors
-# Copyright (C) 2020-2021 rami.io GmbH and contributors
+# Copyright (C) 2014-2020  Raphael Michel and contributors
+# Copyright (C) 2020-today pretix GmbH and contributors
 #
 # This program is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General
 # Public License as published by the Free Software Foundation in version 3 of the License.
--- a/src/pretix/api/serializers/waitinglist.py
+++ b/src/pretix/api/serializers/waitinglist.py
@@ -1,8 +1,8 @@
 #
 # This file is part of pretix (Community Edition).
 #
-# Copyright (C) 2014-2020 Raphael Michel and contributors
-# Copyright (C) 2020-2021 rami.io GmbH and contributors
+# Copyright (C) 2014-2020  Raphael Michel and contributors
+# Copyright (C) 2020-today pretix GmbH and contributors
 #
 # This program is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General
 # Public License as published by the Free Software Foundation in version 3 of the License.
--- a/src/pretix/api/serializers/webhooks.py
+++ b/src/pretix/api/serializers/webhooks.py
@@ -1,8 +1,8 @@
 #
 # This file is part of pretix (Community Edition).
 #
-# Copyright (C) 2014-2020 Raphael Michel and contributors
-# Copyright (C) 2020-2021 rami.io GmbH and contributors
+# Copyright (C) 2014-2020  Raphael Michel and contributors
+# Copyright (C) 2020-today pretix GmbH and contributors
 #
 # This program is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General
 # Public License as published by the Free Software Foundation in version 3 of the License.
--- a/src/pretix/api/signals.py
+++ b/src/pretix/api/signals.py
@@ -1,8 +1,8 @@
 #
 # This file is part of pretix (Community Edition).
 #
-# Copyright (C) 2014-2020 Raphael Michel and contributors
-# Copyright (C) 2020-2021 rami.io GmbH and contributors
+# Copyright (C) 2014-2020  Raphael Michel and contributors
+# Copyright (C) 2020-today pretix GmbH and contributors
 #
 # This program is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General
 # Public License as published by the Free Software Foundation in version 3 of the License.
--- a/src/pretix/api/urls.py
+++ b/src/pretix/api/urls.py
@@ -1,8 +1,8 @@
 #
 # This file is part of pretix (Community Edition).
 #
-# Copyright (C) 2014-2020 Raphael Michel and contributors
-# Copyright (C) 2020-2021 rami.io GmbH and contributors
+# Copyright (C) 2014-2020  Raphael Michel and contributors
+# Copyright (C) 2020-today pretix GmbH and contributors
 #
 # This program is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General
 # Public License as published by the Free Software Foundation in version 3 of the License.
--- a/src/pretix/api/views/init.py
+++ b/src/pretix/api/views/init.py
@@ -1,8 +1,8 @@
 #
 # This file is part of pretix (Community Edition).
 #
-# Copyright (C) 2014-2020 Raphael Michel and contributors
-# Copyright (C) 2020-2021 rami.io GmbH and contributors
+# Copyright (C) 2014-2020  Raphael Michel and contributors
+# Copyright (C) 2020-today pretix GmbH and contributors
 #
 # This program is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General
 # Public License as published by the Free Software Foundation in version 3 of the License.
--- a/src/pretix/api/views/cart.py
+++ b/src/pretix/api/views/cart.py
@@ -1,8 +1,8 @@
 #
 # This file is part of pretix (Community Edition).
 #
-# Copyright (C) 2014-2020 Raphael Michel and contributors
-# Copyright (C) 2020-2021 rami.io GmbH and contributors
+# Copyright (C) 2014-2020  Raphael Michel and contributors
+# Copyright (C) 2020-today pretix GmbH and contributors
 #
 # This program is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General
 # Public License as published by the Free Software Foundation in version 3 of the License.
--- a/src/pretix/api/views/checkin.py
+++ b/src/pretix/api/views/checkin.py
@@ -1,8 +1,8 @@
 #
 # This file is part of pretix (Community Edition).
 #
-# Copyright (C) 2014-2020 Raphael Michel and contributors
-# Copyright (C) 2020-2021 rami.io GmbH and contributors
+# Copyright (C) 2014-2020  Raphael Michel and contributors
+# Copyright (C) 2020-today pretix GmbH and contributors
 #
 # This program is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General
 # Public License as published by the Free Software Foundation in version 3 of the License.
--- a/src/pretix/api/views/device.py
+++ b/src/pretix/api/views/device.py
@@ -1,8 +1,8 @@
 #
 # This file is part of pretix (Community Edition).
 #
-# Copyright (C) 2014-2020 Raphael Michel and contributors
-# Copyright (C) 2020-2021 rami.io GmbH and contributors
+# Copyright (C) 2014-2020  Raphael Michel and contributors
+# Copyright (C) 2020-today pretix GmbH and contributors
 #
 # This program is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General
 # Public License as published by the Free Software Foundation in version 3 of the License.
--- a/src/pretix/api/views/discount.py
+++ b/src/pretix/api/views/discount.py
@@ -1,8 +1,8 @@
 #
 # This file is part of pretix (Community Edition).
 #
-# Copyright (C) 2014-2020 Raphael Michel and contributors
-# Copyright (C) 2020-2021 rami.io GmbH and contributors
+# Copyright (C) 2014-2020  Raphael Michel and contributors
+# Copyright (C) 2020-today pretix GmbH and contributors
 #
 # This program is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General
 # Public License as published by the Free Software Foundation in version 3 of the License.
--- a/src/pretix/api/views/event.py
+++ b/src/pretix/api/views/event.py
@@ -1,8 +1,8 @@
 #
 # This file is part of pretix (Community Edition).
 #
-# Copyright (C) 2014-2020 Raphael Michel and contributors
-# Copyright (C) 2020-2021 rami.io GmbH and contributors
+# Copyright (C) 2014-2020  Raphael Michel and contributors
+# Copyright (C) 2020-today pretix GmbH and contributors
 #
 # This program is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General
 # Public License as published by the Free Software Foundation in version 3 of the License.
--- a/src/pretix/api/views/exporters.py
+++ b/src/pretix/api/views/exporters.py
@@ -1,8 +1,8 @@
 #
 # This file is part of pretix (Community Edition).
 #
-# Copyright (C) 2014-2020 Raphael Michel and contributors
-# Copyright (C) 2020-2021 rami.io GmbH and contributors
+# Copyright (C) 2014-2020  Raphael Michel and contributors
+# Copyright (C) 2020-today pretix GmbH and contributors
 #
 # This program is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General
 # Public License as published by the Free Software Foundation in version 3 of the License.
--- a/src/pretix/api/views/idempotency.py
+++ b/src/pretix/api/views/idempotency.py
@@ -1,8 +1,8 @@
 #
 # This file is part of pretix (Community Edition).
 #
-# Copyright (C) 2014-2020 Raphael Michel and contributors
-# Copyright (C) 2020-2021 rami.io GmbH and contributors
+# Copyright (C) 2014-2020  Raphael Michel and contributors
+# Copyright (C) 2020-today pretix GmbH and contributors
 #
 # This program is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General
 # Public License as published by the Free Software Foundation in version 3 of the License.
--- a/src/pretix/api/views/item.py
+++ b/src/pretix/api/views/item.py
@@ -1,8 +1,8 @@
 #
 # This file is part of pretix (Community Edition).
 #
-# Copyright (C) 2014-2020 Raphael Michel and contributors
-# Copyright (C) 2020-2021 rami.io GmbH and contributors
+# Copyright (C) 2014-2020  Raphael Michel and contributors
+# Copyright (C) 2020-today pretix GmbH and contributors
 #
 # This program is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General
 # Public License as published by the Free Software Foundation in version 3 of the License.
--- a/src/pretix/api/views/media.py
+++ b/src/pretix/api/views/media.py
@@ -1,8 +1,8 @@
 #
 # This file is part of pretix (Community Edition).
 #
-# Copyright (C) 2014-2020 Raphael Michel and contributors
-# Copyright (C) 2020-2021 rami.io GmbH and contributors
+# Copyright (C) 2014-2020  Raphael Michel and contributors
+# Copyright (C) 2020-today pretix GmbH and contributors
 #
 # This program is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General
 # Public License as published by the Free Software Foundation in version 3 of the License.
--- a/src/pretix/api/views/oauth.py
+++ b/src/pretix/api/views/oauth.py
@@ -1,8 +1,8 @@
 #
 # This file is part of pretix (Community Edition).
 #
-# Copyright (C) 2014-2020 Raphael Michel and contributors
-# Copyright (C) 2020-2021 rami.io GmbH and contributors
+# Copyright (C) 2014-2020  Raphael Michel and contributors
+# Copyright (C) 2020-today pretix GmbH and contributors
 #
 # This program is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General
 # Public License as published by the Free Software Foundation in version 3 of the License.
--- a/src/pretix/api/views/order.py
+++ b/src/pretix/api/views/order.py
@@ -1,8 +1,8 @@
 #
 # This file is part of pretix (Community Edition).
 #
-# Copyright (C) 2014-2020 Raphael Michel and contributors
-# Copyright (C) 2020-2021 rami.io GmbH and contributors
+# Copyright (C) 2014-2020  Raphael Michel and contributors
+# Copyright (C) 2020-today pretix GmbH and contributors
 #
 # This program is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General
 # Public License as published by the Free Software Foundation in version 3 of the License.
@@ -743,7 +743,7 @@ class EventOrderViewSet(OrderViewSetMixin, viewsets.ModelViewSet):
                    user=request.user if request.user.is_authenticated else None,
                    auth=request.auth,
                )
-            order_placed.send(self.request.event, order=order)
+            order_placed.send(self.request.event, order=order, bulk=False)
            if order.status == Order.STATUS_PAID:
                order_paid.send(self.request.event, order=order)
                order.log_action(
@@ -764,7 +764,13 @@ class EventOrderViewSet(OrderViewSetMixin, viewsets.ModelViewSet):
            ) and not order.invoices.last()
            invoice = None
            if gen_invoice:
-                invoice = generate_invoice(order, trigger_pdf=True)
+                try:
+                    invoice = generate_invoice(order, trigger_pdf=True)
+                except Exception as e:
+                    logger.exception("Could not generate invoice.")
+                    order.log_action("pretix.event.order.invoice.failed", data={
+                        "exception": str(e)
+                    })

            # Refresh serializer only after running signals
            prefetch_related_objects([order], self._positions_prefetch(request))
@@ -1663,6 +1669,9 @@ class PaymentViewSet(CreateModelMixin, viewsets.ReadOnlyModelViewSet):
        else:
            mark_refunded = request.data.get('mark_canceled', False)

+        if not isinstance(request.data.get("comment", ""), str):
+            return Response({'comment': 'Invalid type.'}, status=status.HTTP_400_BAD_REQUEST)
+
        if payment.state != OrderPayment.PAYMENT_STATE_CONFIRMED:
            return Response({'detail': 'Invalid state of payment.'}, status=status.HTTP_400_BAD_REQUEST)

@@ -1689,6 +1698,7 @@ class PaymentViewSet(CreateModelMixin, viewsets.ReadOnlyModelViewSet):
            amount=amount,
            provider=payment.provider,
            info='{}',
+            comment=request.data.get("comment"),
        )
        payment.order.log_action('pretix.event.order.refund.created', {
            'local_id': r.local_id,
--- a/src/pretix/api/views/organizer.py
+++ b/src/pretix/api/views/organizer.py
@@ -1,8 +1,8 @@
 #
 # This file is part of pretix (Community Edition).
 #
-# Copyright (C) 2014-2020 Raphael Michel and contributors
-# Copyright (C) 2020-2021 rami.io GmbH and contributors
+# Copyright (C) 2014-2020  Raphael Michel and contributors
+# Copyright (C) 2020-today pretix GmbH and contributors
 #
 # This program is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General
 # Public License as published by the Free Software Foundation in version 3 of the License.
@@ -546,7 +546,8 @@ class DeviceViewSet(mixins.CreateModelMixin,


 class OrganizerSettingsView(views.APIView):
-    permission = 'can_change_organizer_settings'
+    permission = None
+    write_permission = 'can_change_organizer_settings'

    def get(self, request, *args, **kwargs):
        s = OrganizerSettingsSerializer(instance=request.organizer.settings, organizer=request.organizer, context={
--- a/src/pretix/api/views/shredders.py
+++ b/src/pretix/api/views/shredders.py
@@ -1,8 +1,8 @@
 #
 # This file is part of pretix (Community Edition).
 #
-# Copyright (C) 2014-2020 Raphael Michel and contributors
-# Copyright (C) 2020-2021 rami.io GmbH and contributors
+# Copyright (C) 2014-2020  Raphael Michel and contributors
+# Copyright (C) 2020-today pretix GmbH and contributors
 #
 # This program is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General
 # Public License as published by the Free Software Foundation in version 3 of the License.
--- a/src/pretix/api/views/upload.py
+++ b/src/pretix/api/views/upload.py
@@ -1,8 +1,8 @@
 #
 # This file is part of pretix (Community Edition).
 #
-# Copyright (C) 2014-2020 Raphael Michel and contributors
-# Copyright (C) 2020-2021 rami.io GmbH and contributors
+# Copyright (C) 2014-2020  Raphael Michel and contributors
+# Copyright (C) 2020-today pretix GmbH and contributors
 #
 # This program is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General
 # Public License as published by the Free Software Foundation in version 3 of the License.
--- a/src/pretix/api/views/user.py
+++ b/src/pretix/api/views/user.py
@@ -1,8 +1,8 @@
 #
 # This file is part of pretix (Community Edition).
 #
-# Copyright (C) 2014-2020 Raphael Michel and contributors
-# Copyright (C) 2020-2021 rami.io GmbH and contributors
+# Copyright (C) 2014-2020  Raphael Michel and contributors
+# Copyright (C) 2020-today pretix GmbH and contributors
 #
 # This program is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General
 # Public License as published by the Free Software Foundation in version 3 of the License.
--- a/src/pretix/api/views/version.py
+++ b/src/pretix/api/views/version.py
@@ -1,8 +1,8 @@
 #
 # This file is part of pretix (Community Edition).
 #
-# Copyright (C) 2014-2020 Raphael Michel and contributors
-# Copyright (C) 2020-2021 rami.io GmbH and contributors
+# Copyright (C) 2014-2020  Raphael Michel and contributors
+# Copyright (C) 2020-today pretix GmbH and contributors
 #
 # This program is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General
 # Public License as published by the Free Software Foundation in version 3 of the License.
--- a/src/pretix/api/views/voucher.py
+++ b/src/pretix/api/views/voucher.py
@@ -1,8 +1,8 @@
 #
 # This file is part of pretix (Community Edition).
 #
-# Copyright (C) 2014-2020 Raphael Michel and contributors
-# Copyright (C) 2020-2021 rami.io GmbH and contributors
+# Copyright (C) 2014-2020  Raphael Michel and contributors
+# Copyright (C) 2020-today pretix GmbH and contributors
 #
 # This program is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General
 # Public License as published by the Free Software Foundation in version 3 of the License.
--- a/src/pretix/api/views/waitinglist.py
+++ b/src/pretix/api/views/waitinglist.py
@@ -1,8 +1,8 @@
 #
 # This file is part of pretix (Community Edition).
 #
-# Copyright (C) 2014-2020 Raphael Michel and contributors
-# Copyright (C) 2020-2021 rami.io GmbH and contributors
+# Copyright (C) 2014-2020  Raphael Michel and contributors
+# Copyright (C) 2020-today pretix GmbH and contributors
 #
 # This program is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General
 # Public License as published by the Free Software Foundation in version 3 of the License.
--- a/src/pretix/api/views/webhooks.py
+++ b/src/pretix/api/views/webhooks.py
@@ -1,8 +1,8 @@
 #
 # This file is part of pretix (Community Edition).
 #
-# Copyright (C) 2014-2020 Raphael Michel and contributors
-# Copyright (C) 2020-2021 rami.io GmbH and contributors
+# Copyright (C) 2014-2020  Raphael Michel and contributors
+# Copyright (C) 2020-today pretix GmbH and contributors
 #
 # This program is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General
 # Public License as published by the Free Software Foundation in version 3 of the License.
--- a/src/pretix/api/webhooks.py
+++ b/src/pretix/api/webhooks.py
@@ -1,8 +1,8 @@
 #
 # This file is part of pretix (Community Edition).
 #
-# Copyright (C) 2014-2020 Raphael Michel and contributors
-# Copyright (C) 2020-2021 rami.io GmbH and contributors
+# Copyright (C) 2014-2020  Raphael Michel and contributors
+# Copyright (C) 2020-today pretix GmbH and contributors
 #
 # This program is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General
 # Public License as published by the Free Software Foundation in version 3 of the License.
@@ -439,8 +439,12 @@ def register_default_webhook_events(sender, **kwargs):
 def notify_webhooks(logentry_ids: list):
    if not isinstance(logentry_ids, list):
        logentry_ids = [logentry_ids]
-    qs = LogEntry.all.select_related('event', 'event__organizer', 'organizer').filter(id__in=logentry_ids)
-    _org, _at, webhooks = None, None, None
+    qs = LogEntry.all.select_related(
+        'event', 'event__organizer', 'organizer'
+    ).order_by(
+        'action_type', 'organizer_id', 'event_id',
+    ).filter(id__in=logentry_ids)
+    _org, _at, _ev, webhooks = None, None, None, None
    for logentry in qs:
        if not logentry.organizer:
            break  # We need to know the organizer
@@ -450,7 +454,7 @@ def notify_webhooks(logentry_ids: list):
        if not notification_type:
            break  # Ignore, no webhooks for this event type

-        if _org != logentry.organizer or _at != logentry.action_type or webhooks is None:
+        if _org != logentry.organizer or _at != logentry.action_type or _ev != logentry.event_id or webhooks is None:
            _org = logentry.organizer
            _at = logentry.action_type

--- a/src/pretix/base/init.py
+++ b/src/pretix/base/init.py
@@ -1,8 +1,8 @@
 #
 # This file is part of pretix (Community Edition).
 #
-# Copyright (C) 2014-2020 Raphael Michel and contributors
-# Copyright (C) 2020-2021 rami.io GmbH and contributors
+# Copyright (C) 2014-2020  Raphael Michel and contributors
+# Copyright (C) 2020-today pretix GmbH and contributors
 #
 # This program is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General
 # Public License as published by the Free Software Foundation in version 3 of the License.
--- a/src/pretix/base/addressvalidation.py
+++ b/src/pretix/base/addressvalidation.py
@@ -1,8 +1,8 @@
 #
 # This file is part of pretix (Community Edition).
 #
-# Copyright (C) 2014-2020 Raphael Michel and contributors
-# Copyright (C) 2020-2021 rami.io GmbH and contributors
+# Copyright (C) 2014-2020  Raphael Michel and contributors
+# Copyright (C) 2020-today pretix GmbH and contributors
 #
 # This program is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General
 # Public License as published by the Free Software Foundation in version 3 of the License.
--- a/src/pretix/base/apps.py
+++ b/src/pretix/base/apps.py
@@ -1,8 +1,8 @@
 #
 # This file is part of pretix (Community Edition).
 #
-# Copyright (C) 2014-2020 Raphael Michel and contributors
-# Copyright (C) 2020-2021 rami.io GmbH and contributors
+# Copyright (C) 2014-2020  Raphael Michel and contributors
+# Copyright (C) 2020-today pretix GmbH and contributors
 #
 # This program is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General
 # Public License as published by the Free Software Foundation in version 3 of the License.
--- a/src/pretix/base/auth.py
+++ b/src/pretix/base/auth.py
@@ -1,8 +1,8 @@
 #
 # This file is part of pretix (Community Edition).
 #
-# Copyright (C) 2014-2020 Raphael Michel and contributors
-# Copyright (C) 2020-2021 rami.io GmbH and contributors
+# Copyright (C) 2014-2020  Raphael Michel and contributors
+# Copyright (C) 2020-today pretix GmbH and contributors
 #
 # This program is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General
 # Public License as published by the Free Software Foundation in version 3 of the License.
--- a/src/pretix/base/banlist.py
+++ b/src/pretix/base/banlist.py
@@ -1,8 +1,8 @@
 #
 # This file is part of pretix (Community Edition).
 #
-# Copyright (C) 2014-2020 Raphael Michel and contributors
-# Copyright (C) 2020-2021 rami.io GmbH and contributors
+# Copyright (C) 2014-2020  Raphael Michel and contributors
+# Copyright (C) 2020-today pretix GmbH and contributors
 #
 # This program is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General
 # Public License as published by the Free Software Foundation in version 3 of the License.
--- a/src/pretix/base/cache.py
+++ b/src/pretix/base/cache.py
@@ -1,8 +1,8 @@
 #
 # This file is part of pretix (Community Edition).
 #
-# Copyright (C) 2014-2020 Raphael Michel and contributors
-# Copyright (C) 2020-2021 rami.io GmbH and contributors
+# Copyright (C) 2014-2020  Raphael Michel and contributors
+# Copyright (C) 2020-today pretix GmbH and contributors
 #
 # This program is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General
 # Public License as published by the Free Software Foundation in version 3 of the License.
--- a/src/pretix/base/channels.py
+++ b/src/pretix/base/channels.py
@@ -1,8 +1,8 @@
 #
 # This file is part of pretix (Community Edition).
 #
-# Copyright (C) 2014-2020 Raphael Michel and contributors
-# Copyright (C) 2020-2021 rami.io GmbH and contributors
+# Copyright (C) 2014-2020  Raphael Michel and contributors
+# Copyright (C) 2020-today pretix GmbH and contributors
 #
 # This program is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General
 # Public License as published by the Free Software Foundation in version 3 of the License.
--- a/src/pretix/base/context.py
+++ b/src/pretix/base/context.py
@@ -1,8 +1,8 @@
 #
 # This file is part of pretix (Community Edition).
 #
-# Copyright (C) 2014-2020 Raphael Michel and contributors
-# Copyright (C) 2020-2021 rami.io GmbH and contributors
+# Copyright (C) 2014-2020  Raphael Michel and contributors
+# Copyright (C) 2020-today pretix GmbH and contributors
 #
 # This program is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General
 # Public License as published by the Free Software Foundation in version 3 of the License.
--- a/src/pretix/base/customersso/init.py
+++ b/src/pretix/base/customersso/init.py
@@ -1,8 +1,8 @@
 #
 # This file is part of pretix (Community Edition).
 #
-# Copyright (C) 2014-2020 Raphael Michel and contributors
-# Copyright (C) 2020-2021 rami.io GmbH and contributors
+# Copyright (C) 2014-2020  Raphael Michel and contributors
+# Copyright (C) 2020-today pretix GmbH and contributors
 #
 # This program is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General
 # Public License as published by the Free Software Foundation in version 3 of the License.
--- a/src/pretix/base/customersso/oidc.py
+++ b/src/pretix/base/customersso/oidc.py
@@ -1,8 +1,8 @@
 #
 # This file is part of pretix (Community Edition).
 #
-# Copyright (C) 2014-2020 Raphael Michel and contributors
-# Copyright (C) 2020-2021 rami.io GmbH and contributors
+# Copyright (C) 2014-2020  Raphael Michel and contributors
+# Copyright (C) 2020-today pretix GmbH and contributors
 #
 # This program is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General
 # Public License as published by the Free Software Foundation in version 3 of the License.
--- a/src/pretix/base/datasync/init.py
+++ b/src/pretix/base/datasync/init.py
@@ -1,8 +1,8 @@
 #
 # This file is part of pretix (Community Edition).
 #
-# Copyright (C) 2014-2020 Raphael Michel and contributors
-# Copyright (C) 2020-2021 rami.io GmbH and contributors
+# Copyright (C) 2014-2020  Raphael Michel and contributors
+# Copyright (C) 2020-today pretix GmbH and contributors
 #
 # This program is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General
 # Public License as published by the Free Software Foundation in version 3 of the License.
--- a/src/pretix/base/datasync/datasync.py
+++ b/src/pretix/base/datasync/datasync.py
@@ -1,8 +1,8 @@
 #
 # This file is part of pretix (Community Edition).
 #
-# Copyright (C) 2014-2020 Raphael Michel and contributors
-# Copyright (C) 2020-2021 rami.io GmbH and contributors
+# Copyright (C) 2014-2020  Raphael Michel and contributors
+# Copyright (C) 2020-today pretix GmbH and contributors
 #
 # This program is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General
 # Public License as published by the Free Software Foundation in version 3 of the License.
@@ -106,7 +106,7 @@ class OutboundSyncProvider:
        return str(cls.identifier)

    @classmethod
-    def enqueue_order(cls, order, triggered_by, not_before=None):
+    def enqueue_order(cls, order, triggered_by, not_before=None, immediate=False):
        """
        Adds an order to the sync queue. May only be called on derived classes which define an ``identifier`` attribute.

@@ -119,10 +119,14 @@ class OutboundSyncProvider:
        :param order: the Order that should be synced
        :param triggered_by: the reason why the order should be synced, e.g. name of the signal
                             (currently only used internally for logging)
+        :param immediate: whether a new sync task should run immediately for this order, instead
+                          of waiting for the next periodic_task interval
+        :return: Return a tuple (queue_item, created), where created is a boolean
+                 specifying whether a new queue item was created.
        """
        if not hasattr(cls, 'identifier'):
            raise TypeError('Call this method on a derived class that defines an "identifier" attribute.')
-        OrderSyncQueue.objects.update_or_create(
+        queue_item, created = OrderSyncQueue.objects.update_or_create(
            order=order,
            sync_provider=cls.identifier,
            in_flight=False,
@@ -133,6 +137,10 @@ class OutboundSyncProvider:
                "need_manual_retry": None,
            },
        )
+        if immediate:
+            from pretix.base.services.datasync import sync_single
+            sync_single.apply_async(args=(queue_item.pk,))
+        return queue_item, created

    @classmethod
    def get_external_link_info(cls, event, external_link_href, external_link_display_name):
@@ -252,9 +260,15 @@ class OutboundSyncProvider:
        except KeyError:
            with language(self.event.settings.locale):
                raise SyncConfigError([_(
-                    'Field "{field_name}" is not valid for {available_inputs}. Please check your {provider_name} settings.'
-                ).format(key=key, available_inputs="/".join(inputs.keys()), provider_name=self.display_name)])
-        input = inputs[field.required_input]
+                    'Field "{field_name}" does not exist. Please check your {provider_name} settings.'
+                ).format(field_name=key, provider_name=self.display_name)])
+        try:
+            input = inputs[field.required_input]
+        except KeyError:
+            with language(self.event.settings.locale):
+                raise SyncConfigError([_(
+                    'Field "{field_name}" requires {required_input}, but only got {available_inputs}. Please check your {provider_name} settings.'
+                ).format(field_name=key, required_input=field.required_input, available_inputs=", ".join(inputs.keys()), provider_name=self.display_name)])
        val = field.getter(input)
        if isinstance(val, list):
            if field.enum_opts and mapping_entry.get("value_map"):
@@ -377,7 +391,7 @@ class OutboundSyncProvider:
    def sync_order(self, order):
        if not self.should_sync_order(order):
            logger.debug("Skipping order %r", order)
-            return
+            return {}

        logger.debug("Syncing order %r", order)
        positions = list(
--- a/src/pretix/base/datasync/sourcefields.py
+++ b/src/pretix/base/datasync/sourcefields.py
@@ -1,8 +1,8 @@
 #
 # This file is part of pretix (Community Edition).
 #
-# Copyright (C) 2014-2020 Raphael Michel and contributors
-# Copyright (C) 2020-2021 rami.io GmbH and contributors
+# Copyright (C) 2014-2020  Raphael Michel and contributors
+# Copyright (C) 2020-today pretix GmbH and contributors
 #
 # This program is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General
 # Public License as published by the Free Software Foundation in version 3 of the License.
--- a/src/pretix/base/datasync/utils.py
+++ b/src/pretix/base/datasync/utils.py
@@ -1,8 +1,8 @@
 #
 # This file is part of pretix (Community Edition).
 #
-# Copyright (C) 2014-2020 Raphael Michel and contributors
-# Copyright (C) 2020-2021 rami.io GmbH and contributors
+# Copyright (C) 2014-2020  Raphael Michel and contributors
+# Copyright (C) 2020-today pretix GmbH and contributors
 #
 # This program is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General
 # Public License as published by the Free Software Foundation in version 3 of the License.
--- a/src/pretix/base/decimal.py
+++ b/src/pretix/base/decimal.py
@@ -1,8 +1,8 @@
 #
 # This file is part of pretix (Community Edition).
 #
-# Copyright (C) 2014-2020 Raphael Michel and contributors
-# Copyright (C) 2020-2021 rami.io GmbH and contributors
+# Copyright (C) 2014-2020  Raphael Michel and contributors
+# Copyright (C) 2020-today pretix GmbH and contributors
 #
 # This program is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General
 # Public License as published by the Free Software Foundation in version 3 of the License.
--- a/src/pretix/base/email.py
+++ b/src/pretix/base/email.py
@@ -1,8 +1,8 @@
 #
 # This file is part of pretix (Community Edition).
 #
-# Copyright (C) 2014-2020 Raphael Michel and contributors
-# Copyright (C) 2020-2021 rami.io GmbH and contributors
+# Copyright (C) 2014-2020  Raphael Michel and contributors
+# Copyright (C) 2020-today pretix GmbH and contributors
 #
 # This program is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General
 # Public License as published by the Free Software Foundation in version 3 of the License.
@@ -24,6 +24,7 @@ from itertools import groupby
 from smtplib import SMTPResponseException
 from typing import TypeVar

+import bleach
 import css_inline
 from django.conf import settings
 from django.core.mail.backends.smtp import EmailBackend
@@ -34,7 +35,10 @@ from django.utils.translation import get_language, gettext_lazy as _

 from pretix.base.models import Event
 from pretix.base.signals import register_html_mail_renderers
-from pretix.base.templatetags.rich_text import markdown_compile_email
+from pretix.base.templatetags.rich_text import (
+    DEFAULT_CALLBACKS, EMAIL_RE, URL_RE, abslink_callback,
+    markdown_compile_email, truelink_callback,
+)
 from pretix.helpers.format import SafeFormatter, format_map

 from pretix.base.services.placeholders import (  # noqa
@@ -133,13 +137,24 @@ class TemplateBasedMailRenderer(BaseHTMLMailRenderer):
    def template_name(self):
        raise NotImplementedError()

-    def compile_markdown(self, plaintext):
-        return markdown_compile_email(plaintext)
+    def compile_markdown(self, plaintext, context=None):
+        return markdown_compile_email(plaintext, context=context)

    def render(self, plain_body: str, plain_signature: str, subject: str, order, position, context) -> str:
-        body_md = self.compile_markdown(plain_body)
+        body_md = self.compile_markdown(plain_body, context)
        if context:
-            body_md = format_map(body_md, context=context, mode=SafeFormatter.MODE_RICH_TO_HTML)
+            linker = bleach.Linker(
+                url_re=URL_RE,
+                email_re=EMAIL_RE,
+                callbacks=DEFAULT_CALLBACKS + [truelink_callback, abslink_callback],
+                parse_email=True
+            )
+            body_md = format_map(
+                body_md,
+                context=context,
+                mode=SafeFormatter.MODE_RICH_TO_HTML,
+                linkifier=linker
+            )
        htmlctx = {
            'site': settings.PRETIX_INSTANCE_NAME,
            'site_url': settings.SITE_URL,
--- a/src/pretix/base/exporter.py
+++ b/src/pretix/base/exporter.py
@@ -1,8 +1,8 @@
 #
 # This file is part of pretix (Community Edition).
 #
-# Copyright (C) 2014-2020 Raphael Michel and contributors
-# Copyright (C) 2020-2021 rami.io GmbH and contributors
+# Copyright (C) 2014-2020  Raphael Michel and contributors
+# Copyright (C) 2020-today pretix GmbH and contributors
 #
 # This program is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General
 # Public License as published by the Free Software Foundation in version 3 of the License.
@@ -105,6 +105,18 @@ class BaseExporter:
        """
        return False

+    @property
+    def repeatable_read(self) -> bool:
+        """
+        If ``True``, this exporter will be run in a REPEATABLE READ transaction. This ensures consistent results for
+        all queries performed by the exporter, but creates a performance burden on the database server. We recommend to
+        disable this for exporters that take very long to run and do not rely on this behavior, such as export of lists
+        to CSV files.
+
+        Defaults to ``True`` for now, but default may change in future versions.
+        """
+        return True
+
    @property
    def identifier(self) -> str:
        """
--- a/src/pretix/base/exporters/init.py
+++ b/src/pretix/base/exporters/init.py
@@ -1,8 +1,8 @@
 #
 # This file is part of pretix (Community Edition).
 #
-# Copyright (C) 2014-2020 Raphael Michel and contributors
-# Copyright (C) 2020-2021 rami.io GmbH and contributors
+# Copyright (C) 2014-2020  Raphael Michel and contributors
+# Copyright (C) 2020-today pretix GmbH and contributors
 #
 # This program is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General
 # Public License as published by the Free Software Foundation in version 3 of the License.
--- a/src/pretix/base/exporters/answers.py
+++ b/src/pretix/base/exporters/answers.py
@@ -1,8 +1,8 @@
 #
 # This file is part of pretix (Community Edition).
 #
-# Copyright (C) 2014-2020 Raphael Michel and contributors
-# Copyright (C) 2020-2021 rami.io GmbH and contributors
+# Copyright (C) 2014-2020  Raphael Michel and contributors
+# Copyright (C) 2020-today pretix GmbH and contributors
 #
 # This program is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General
 # Public License as published by the Free Software Foundation in version 3 of the License.
--- a/src/pretix/base/exporters/customers.py
+++ b/src/pretix/base/exporters/customers.py
@@ -1,8 +1,8 @@
 #
 # This file is part of pretix (Community Edition).
 #
-# Copyright (C) 2014-2020 Raphael Michel and contributors
-# Copyright (C) 2020-2021 rami.io GmbH and contributors
+# Copyright (C) 2014-2020  Raphael Michel and contributors
+# Copyright (C) 2020-today pretix GmbH and contributors
 #
 # This program is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General
 # Public License as published by the Free Software Foundation in version 3 of the License.
--- a/src/pretix/base/exporters/dekodi.py
+++ b/src/pretix/base/exporters/dekodi.py
@@ -1,8 +1,8 @@
 #
 # This file is part of pretix (Community Edition).
 #
-# Copyright (C) 2014-2020 Raphael Michel and contributors
-# Copyright (C) 2020-2021 rami.io GmbH and contributors
+# Copyright (C) 2014-2020  Raphael Michel and contributors
+# Copyright (C) 2020-today pretix GmbH and contributors
 #
 # This program is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General
 # Public License as published by the Free Software Foundation in version 3 of the License.
--- a/src/pretix/base/exporters/events.py
+++ b/src/pretix/base/exporters/events.py
@@ -1,8 +1,8 @@
 #
 # This file is part of pretix (Community Edition).
 #
-# Copyright (C) 2014-2020 Raphael Michel and contributors
-# Copyright (C) 2020-2021 rami.io GmbH and contributors
+# Copyright (C) 2014-2020  Raphael Michel and contributors
+# Copyright (C) 2020-today pretix GmbH and contributors
 #
 # This program is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General
 # Public License as published by the Free Software Foundation in version 3 of the License.
--- a/src/pretix/base/exporters/invoices.py
+++ b/src/pretix/base/exporters/invoices.py
@@ -1,8 +1,8 @@
 #
 # This file is part of pretix (Community Edition).
 #
-# Copyright (C) 2014-2020 Raphael Michel and contributors
-# Copyright (C) 2020-2021 rami.io GmbH and contributors
+# Copyright (C) 2014-2020  Raphael Michel and contributors
+# Copyright (C) 2020-today pretix GmbH and contributors
 #
 # This program is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General
 # Public License as published by the Free Software Foundation in version 3 of the License.
@@ -125,6 +125,7 @@ class InvoiceExporter(InvoiceExporterMixin, BaseExporter):
    identifier = 'invoices'
    verbose_name = _('All invoices')
    description = _('Download all invoices created by the system as a ZIP file of PDF files.')
+    repeatable_read = False

    def render(self, form_data: dict, output_file=None):
        qs = self.invoices_queryset(form_data).filter(shredded=False)
@@ -180,6 +181,7 @@ class InvoiceDataExporter(InvoiceExporterMixin, MultiSheetListExporter):
                    'includes two sheets, one with a line for every invoice, and one with a line for every position of '
                    'every invoice.')
    featured = True
+    repeatable_read = False

    @property
    def additional_form_fields(self):
--- a/src/pretix/base/exporters/items.py
+++ b/src/pretix/base/exporters/items.py
@@ -1,8 +1,8 @@
 #
 # This file is part of pretix (Community Edition).
 #
-# Copyright (C) 2014-2020 Raphael Michel and contributors
-# Copyright (C) 2020-2021 rami.io GmbH and contributors
+# Copyright (C) 2014-2020  Raphael Michel and contributors
+# Copyright (C) 2020-today pretix GmbH and contributors
 #
 # This program is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General
 # Public License as published by the Free Software Foundation in version 3 of the License.
--- a/src/pretix/base/exporters/json.py
+++ b/src/pretix/base/exporters/json.py
@@ -1,8 +1,8 @@
 #
 # This file is part of pretix (Community Edition).
 #
-# Copyright (C) 2014-2020 Raphael Michel and contributors
-# Copyright (C) 2020-2021 rami.io GmbH and contributors
+# Copyright (C) 2014-2020  Raphael Michel and contributors
+# Copyright (C) 2020-today pretix GmbH and contributors
 #
 # This program is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General
 # Public License as published by the Free Software Foundation in version 3 of the License.
--- a/src/pretix/base/exporters/mail.py
+++ b/src/pretix/base/exporters/mail.py
@@ -1,8 +1,8 @@
 #
 # This file is part of pretix (Community Edition).
 #
-# Copyright (C) 2014-2020 Raphael Michel and contributors
-# Copyright (C) 2020-2021 rami.io GmbH and contributors
+# Copyright (C) 2014-2020  Raphael Michel and contributors
+# Copyright (C) 2020-today pretix GmbH and contributors
 #
 # This program is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General
 # Public License as published by the Free Software Foundation in version 3 of the License.
--- a/src/pretix/base/exporters/orderlist.py
+++ b/src/pretix/base/exporters/orderlist.py
@@ -1,8 +1,8 @@
 #
 # This file is part of pretix (Community Edition).
 #
-# Copyright (C) 2014-2020 Raphael Michel and contributors
-# Copyright (C) 2020-2021 rami.io GmbH and contributors
+# Copyright (C) 2014-2020  Raphael Michel and contributors
+# Copyright (C) 2020-today pretix GmbH and contributors
 #
 # This program is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General
 # Public License as published by the Free Software Foundation in version 3 of the License.
@@ -90,6 +90,7 @@ class OrderListExporter(MultiSheetListExporter):
                               'with a line for every order, one with a line for every order position, and one with '
                               'a line for every additional fee charged in an order.')
    featured = True
+    repeatable_read = False

    @cached_property
    def providers(self):
@@ -842,6 +843,7 @@ class TransactionListExporter(ListExporter):
    description = gettext_lazy('Download a spreadsheet of all substantial changes to orders, i.e. all changes to '
                               'products, prices or tax rates. The information is only accurate for changes made with '
                               'pretix versions released after October 2021.')
+    repeatable_read = False

    @cached_property
    def providers(self):
@@ -1020,6 +1022,7 @@ class PaymentListExporter(ListExporter):
    category = pgettext_lazy('export_category', 'Order data')
    description = gettext_lazy('Download a spreadsheet of all payments or refunds of every order.')
    featured = True
+    repeatable_read = False

    @property
    def additional_form_fields(self):
@@ -1159,7 +1162,7 @@ class QuotaListExporter(ListExporter):
        yield headers

        quotas = list(self.event.quotas.select_related('subevent'))
-        qa = QuotaAvailability(full_results=True)
+        qa = QuotaAvailability(full_results=True, allow_repeatable_read=True)
        qa.queue(*quotas)
        qa.compute()

@@ -1200,6 +1203,7 @@ class GiftcardTransactionListExporter(OrganizerLevelExportMixin, ListExporter):
    organizer_required_permission = 'can_manage_gift_cards'
    category = pgettext_lazy('export_category', 'Gift cards')
    description = gettext_lazy('Download a spreadsheet of all gift card transactions.')
+    repeatable_read = False

    @property
    def additional_form_fields(self):
@@ -1258,6 +1262,7 @@ class GiftcardRedemptionListExporter(ListExporter):
    verbose_name = gettext_lazy('Gift card redemptions')
    category = pgettext_lazy('export_category', 'Order data')
    description = gettext_lazy('Download a spreadsheet of all payments or refunds that involve gift cards.')
+    repeatable_read = False

    def iterate_list(self, form_data):
        payments = OrderPayment.objects.filter(
--- a/src/pretix/base/exporters/reusablemedia.py
+++ b/src/pretix/base/exporters/reusablemedia.py
@@ -1,8 +1,8 @@
 #
 # This file is part of pretix (Community Edition).
 #
-# Copyright (C) 2014-2020 Raphael Michel and contributors
-# Copyright (C) 2020-2021 rami.io GmbH and contributors
+# Copyright (C) 2014-2020  Raphael Michel and contributors
+# Copyright (C) 2020-today pretix GmbH and contributors
 #
 # This program is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General
 # Public License as published by the Free Software Foundation in version 3 of the License.
@@ -34,6 +34,7 @@ class ReusableMediaExporter(OrganizerLevelExportMixin, ListExporter):
    verbose_name = _('Reusable media')
    category = pgettext_lazy('export_category', 'Reusable media')
    description = _('Download a spread sheet with the data of all reusable medias on your account.')
+    repeatable_read = False

    def iterate_list(self, form_data):
        media = ReusableMedium.objects.filter(
--- a/src/pretix/base/exporters/waitinglist.py
+++ b/src/pretix/base/exporters/waitinglist.py
@@ -1,8 +1,8 @@
 #
 # This file is part of pretix (Community Edition).
 #
-# Copyright (C) 2014-2020 Raphael Michel and contributors
-# Copyright (C) 2020-2021 rami.io GmbH and contributors
+# Copyright (C) 2014-2020  Raphael Michel and contributors
+# Copyright (C) 2020-today pretix GmbH and contributors
 #
 # This program is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General
 # Public License as published by the Free Software Foundation in version 3 of the License.
@@ -41,6 +41,7 @@ class WaitingListExporter(ListExporter):
    verbose_name = _('Waiting list')
    category = pgettext_lazy('export_category', 'Waiting list')
    description = _('Download a spread sheet with all your waiting list data.')
+    repeatable_read = False

    # map selected status to label and queryset-filter
    status_filters = [
--- a/src/pretix/base/forms/init.py
+++ b/src/pretix/base/forms/init.py
@@ -1,8 +1,8 @@
 #
 # This file is part of pretix (Community Edition).
 #
-# Copyright (C) 2014-2020 Raphael Michel and contributors
-# Copyright (C) 2020-2021 rami.io GmbH and contributors
+# Copyright (C) 2014-2020  Raphael Michel and contributors
+# Copyright (C) 2020-today pretix GmbH and contributors
 #
 # This program is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General
 # Public License as published by the Free Software Foundation in version 3 of the License.
--- a/Show More
+++ b/Show More