Orders API: Fix race condition in voucher redemption (Z#23230391)

The old code relied on the `Voucher.redeemed` value obtained *before*
the lock was taken, not afterwards.

The change in services/orders.py is functionally pointless, but it makes
the pattern of "fill availability only after lock" clearer and might
avoid introducing similar bugs in the future.

Dockerfile

@@ -1,4 +1,4 @@
-FROM python:3.11-bookworm
+FROM python:3.13-trixie
 
 RUN apt-get update && \
     apt-get install -y --no-install-recommends \

pyproject.toml

@@ -76,7 +76,7 @@ dependencies = [
   "paypal-checkout-serversdk==1.0.*",
   "PyJWT==2.12.*",
   "phonenumberslite==9.0.*",
-  "Pillow==12.1.*",
+  "Pillow==12.2.*",
   "pretix-plugin-build",
   "protobuf==7.34.*",
   "psycopg2-binary",
@@ -90,10 +90,10 @@ dependencies = [
   "pytz-deprecation-shim==0.1.*",
   "pyuca",
   "qrcode==8.2",
-  "redis==7.1.*",
+  "redis==7.4.*",
   "reportlab==4.4.*",
   "requests==2.32.*",
-  "sentry-sdk==2.56.*",
+  "sentry-sdk==2.57.*",
   "sepaxml==2.7.*",
   "stripe==7.9.*",
   "text-unidecode==1.*",

src/pretix/api/serializers/order.py

@@ -1412,6 +1412,7 @@ class OrderCreateSerializer(I18nAwareModelSerializer):
         qa = QuotaAvailability()
         qa.queue(*[q for q, d in quota_diff_for_locking.items() if d > 0])
         qa.compute()
+        v_avail = {}
 
         # These are not technically correct as diff use due to the time offset applied above, so let's prevent accidental
         # use further down
@@ -1441,11 +1442,13 @@ class OrderCreateSerializer(I18nAwareModelSerializer):
 
                 voucher_usage[v] += 1
                 if voucher_usage[v] > 0:
-                    redeemed_in_carts = CartPosition.objects.filter(
-                        Q(voucher=pos_data['voucher']) & Q(event=self.context['event']) & Q(expires__gte=now_dt)
-                    ).exclude(pk__in=[cp.pk for cp in delete_cps])
-                    v_avail = v.max_usages - v.redeemed - redeemed_in_carts.count()
-                    if v_avail < voucher_usage[v]:
+                    if v not in v_avail:
+                        v.refresh_from_db(fields=['redeemed'])
+                        redeemed_in_carts = CartPosition.objects.filter(
+                            Q(voucher=v) & Q(event=self.context['event']) & Q(expires__gte=now_dt)
+                        ).exclude(pk__in=[cp.pk for cp in delete_cps])
+                        v_avail[v] = v.max_usages - v.redeemed - redeemed_in_carts.count()
+                    if v_avail[v] < voucher_usage[v]:
                         errs[i]['voucher'] = [
                             'The voucher has already been used the maximum number of times.'
                         ]

src/pretix/api/views/checkin.py

@@ -1122,7 +1122,7 @@ class CheckinViewSet(viewsets.ReadOnlyModelViewSet):
     permission = 'event.orders:read'
 
     def get_queryset(self):
-        qs = Checkin.all.filter().select_related(
+        qs = Checkin.all.filter(list__event=self.request.event).select_related(
             "position",
             "device",
         )

src/pretix/base/exporter.py

@@ -47,6 +47,7 @@ from django.utils.formats import localize
 from django.utils.translation import gettext, gettext_lazy as _
 
 from pretix.base.models import Event
+from pretix.base.models.auth import PermissionHolder
 from pretix.helpers.safe_openpyxl import (  # NOQA: backwards compatibility for plugins using excel_safe
     SafeWorkbook, remove_invalid_excel_chars as excel_safe,
 )
@@ -59,11 +60,20 @@ class BaseExporter:
     This is the base class for all data exporters
     """
 
-    def __init__(self, event, organizer, progress_callback=lambda v: None):
+    def __init__(self, event, organizer, permission_holder: PermissionHolder=None, progress_callback=lambda v: None):
+        """
+        :param event: Event context, can also be a queryset of events for multi-event exports
+        :param organizer: Organizer context
+        :param user: The user who triggered the export (or None).
+        :param token: The API token that triggered the export (or None).
+        :param device: The device that triggered the export (or None)
+        :param progress_callback: Callback function with progress
+        """
         self.event = event
         self.organizer = organizer
         self.progress_callback = progress_callback
         self.is_multievent = isinstance(event, QuerySet)
+        self.permission_holder = permission_holder
         if isinstance(event, QuerySet):
             self.events = event
             self.event = None
@@ -180,7 +190,7 @@ class BaseExporter:
         return True
 
     @classmethod
-    def get_required_event_permission(cls) -> str:
+    def get_required_event_permission(cls) -> Optional[str]:
         """
         The permission level required to use this exporter for events. For multi-event-exports, this will be used
         to limit the selection of events. Will be ignored if the ``OrganizerLevelExportMixin`` mixin is used.
@@ -195,7 +205,7 @@ class OrganizerLevelExportMixin:
         raise TypeError("required_event_permission may not be called on OrganizerLevelExportMixin")
 
     @classmethod
-    def get_required_organizer_permission(cls) -> str:
+    def get_required_organizer_permission(cls) -> Optional[str]:
         """
         The permission level required to use this exporter. Must be set for organizer-level exports. Set to `None` to
         allow everyone with any access to the organizer.

src/pretix/base/modelimport.py

@@ -70,6 +70,10 @@ def parse_csv(file, length=None, mode="strict", charset=None):
         except ImportError:
             charset = file.charset
     data = data.decode(charset or "utf-8", mode)
+
+    # remove stray linebreaks from the end of the file
+    data = data.rstrip("\n")
+
     # If the file was modified on a Mac, it only contains \r as line breaks
     if '\r' in data and '\n' not in data:
         data = data.replace('\r', '\n')

src/pretix/base/models/_transactions.py

@@ -29,7 +29,9 @@ import inspect
 import logging
 import os
 import threading
+from pathlib import Path
 
+import django
 from django.conf import settings
 from django.db import transaction
 
@@ -74,10 +76,14 @@ def _transactions_mark_order_dirty(order_id, using=None):
     if "PYTEST_CURRENT_TEST" in os.environ:
         # We don't care about Order.objects.create() calls in test code so let's try to figure out if this is test code
         # or not.
-        for frame in inspect.stack():
-            if 'pretix/base/models/orders' in frame.filename:
+        for frame in inspect.stack()[1:]:
+            if (
+                'pretix/base/models/orders' in frame.filename
+                or Path(frame.filename).is_relative_to(Path(django.__file__).parent)
+            ):
+                # Ignore model- and django-internal code
                 continue
-            elif 'test_' in frame.filename or 'conftest.py in frame.filename':
+            elif 'test_' in frame.filename or 'conftest.py' in frame.filename:
                 return
             elif 'pretix/' in frame.filename or 'pretix_' in frame.filename:
                 # This went through non-test code, let's consider it non-test

src/pretix/base/models/auth.py

@@ -38,6 +38,7 @@ import operator
 import secrets
 from datetime import timedelta
 from functools import reduce
+from typing import Protocol
 
 from django.conf import settings
 from django.contrib.auth.models import (
@@ -67,6 +68,14 @@ class EmailAddressTakenError(IntegrityError):
     pass
 
 
+class PermissionHolder(Protocol):
+    def has_event_permission(self, organizer, event, perm_name=None, request=None, session_key=None) -> bool:
+        ...
+
+    def has_organizer_permission(self, organizer, perm_name=None, request=None):
+        ...
+
+
 class UserManager(BaseUserManager):
     """
     This is the user manager for our custom user model. See the User
@@ -696,6 +705,18 @@ class User(AbstractBaseUser, PermissionsMixin, LoggingMixin):
         return self.teams.exists()
 
 
+class UserWithStaffSession:
+    # Wrapper around a User object with a staff session, implementing the PermissionHolder Protocol
+    def __init__(self, user):
+        self.user = user
+
+    def has_event_permission(self, organizer, event, perm_name=None, request=None, session_key=None) -> bool:
+        return True
+
+    def has_organizer_permission(self, organizer, perm_name=None, request=None):
+        return True
+
+
 class UserKnownLoginSource(models.Model):
     user = models.ForeignKey('User', on_delete=models.CASCADE, related_name="known_login_sources")
     agent_type = models.CharField(max_length=255, null=True, blank=True)

src/pretix/base/models/devices.py

@@ -229,7 +229,7 @@ class Device(LoggedModel):
         """
         return self._organizer_permission_set() if self.organizer == organizer else set()
 
-    def has_event_permission(self, organizer, event, perm_name=None, request=None) -> bool:
+    def has_event_permission(self, organizer, event, perm_name=None, request=None, session_key=None) -> bool:
         """
         Checks if this token is part of a team that grants access of type ``perm_name``
         to the event ``event``.
@@ -238,6 +238,7 @@ class Device(LoggedModel):
         :param event: The event to check
         :param perm_name: The permission, e.g. ``event.orders:read``
         :param request: This parameter is ignored and only defined for compatibility reasons.
+        :param session_key: This parameter is ignored and only defined for compatibility reasons.
         :return: bool
         """
         has_event_access = (self.all_events and organizer == self.organizer) or (

src/pretix/base/models/orders.py

@@ -590,7 +590,7 @@ class Order(LockModel, LoggedModel):
             not kwargs.get('force_save_with_deferred_fields', None) and
             (not update_fields or ('require_approval' not in update_fields and 'status' not in update_fields))
         ):
-            _fail("It is unsafe to call save() on an OrderFee with deferred fields since we can't check if you missed "
+            _fail("It is unsafe to call save() on an Order with deferred fields since we can't check if you missed "
                   "creating a transaction. Call save(force_save_with_deferred_fields=True) if you really want to do "
                   "this.")
 
@@ -2841,7 +2841,7 @@ class OrderPosition(AbstractPosition):
             if Transaction.key(self) != self.__initial_transaction_key or self.canceled != self.__initial_canceled or not self.pk:
                 _transactions_mark_order_dirty(self.order_id, using=kwargs.get('using', None))
         elif not kwargs.get('force_save_with_deferred_fields', None):
-            _fail("It is unsafe to call save() on an OrderFee with deferred fields since we can't check if you missed "
+            _fail("It is unsafe to call save() on an OrderPosition with deferred fields since we can't check if you missed "
                   "creating a transaction. Call save(force_save_with_deferred_fields=True) if you really want to do "
                   "this.")
 

src/pretix/base/models/organizer.py

@@ -319,6 +319,9 @@ class TeamQuerySet(models.QuerySet):
     def event_permission_q(cls, perm_name):
         from ..permissions import assert_valid_event_permission
 
+        if perm_name is None:
+            return Q()
+
         if perm_name.startswith('can_') and perm_name in OLD_TO_NEW_EVENT_COMPAT:  # legacy
             return reduce(operator.and_, [cls.event_permission_q(p) for p in OLD_TO_NEW_EVENT_COMPAT[perm_name]])
         assert_valid_event_permission(perm_name, allow_legacy=False)
@@ -331,6 +334,9 @@ class TeamQuerySet(models.QuerySet):
     def organizer_permission_q(cls, perm_name):
         from ..permissions import assert_valid_organizer_permission
 
+        if perm_name is None:
+            return Q()
+
         if perm_name.startswith('can_') and perm_name in OLD_TO_NEW_ORGANIZER_COMPAT:  # legacy
             return reduce(operator.and_, [cls.organizer_permission_q(p) for p in OLD_TO_NEW_ORGANIZER_COMPAT[perm_name]])
         assert_valid_organizer_permission(perm_name, allow_legacy=False)
@@ -550,7 +556,7 @@ class TeamAPIToken(models.Model):
         """
         return self.team.organizer_permission_set() if self.team.organizer == organizer else set()
 
-    def has_event_permission(self, organizer, event, perm_name=None, request=None) -> bool:
+    def has_event_permission(self, organizer, event, perm_name=None, request=None, session_key=None) -> bool:
         """
         Checks if this token is part of a team that grants access of type ``perm_name``
         to the event ``event``.
@@ -559,6 +565,7 @@ class TeamAPIToken(models.Model):
         :param event: The event to check
         :param perm_name: The permission, e.g. ``event.orders:read``
         :param request: This parameter is ignored and only defined for compatibility reasons.
+        :param session_key: This parameter is ignored and only defined for compatibility reasons.
         :return: bool
         """
         has_event_access = (self.team.all_events and organizer == self.team.organizer) or (

src/pretix/base/pdf.py

@@ -54,7 +54,7 @@ from bidi import get_display
 from django.conf import settings
 from django.contrib.staticfiles import finders
 from django.core.exceptions import ValidationError
-from django.db.models import Max, Min
+from django.db.models import Exists, Max, Min, OuterRef
 from django.db.models.fields.files import FieldFile
 from django.dispatch import receiver
 from django.utils.deconstruct import deconstructible
@@ -76,7 +76,7 @@ from reportlab.pdfgen.canvas import Canvas
 from reportlab.platypus import Paragraph
 
 from pretix.base.i18n import language
-from pretix.base.models import Event, Order, OrderPosition, Question
+from pretix.base.models import Checkin, Event, Order, OrderPosition, Question
 from pretix.base.settings import PERSON_NAME_SCHEMES
 from pretix.base.signals import layout_image_variables, layout_text_variables
 from pretix.base.templatetags.money import money_filter
@@ -379,6 +379,13 @@ DEFAULT_VARIABLES = OrderedDict((
             str(p) for p in generate_compressed_addon_list(op, order, ev)
         ])
     }),
+    ("checked_in_addons", {
+        "label": _("List of Checked-In Add-Ons"),
+        "editor_sample": _("Add-on 1\n2x Add-on 2"),
+        "evaluate": lambda op, order, ev: "\n".join([
+            str(p) for p in generate_compressed_addon_list(op, order, ev, only_checked_in=True)
+        ])
+    }),
     ("organizer", {
         "label": _("Organizer name"),
         "editor_sample": _("Event organizer company"),
@@ -750,12 +757,16 @@ def get_program_times(op: OrderPosition, ev: Event):
     ])
 
 
-def generate_compressed_addon_list(op, order, event):
+def generate_compressed_addon_list(op, order, event, only_checked_in=False):
     itemcount = defaultdict(int)
-    addons = [p for p in (
+    addon_qs = (
         op.addons.all() if 'addons' in getattr(op, '_prefetched_objects_cache', {})
         else op.addons.select_related('item', 'variation')
-    ) if not p.canceled]
+    )
+    if only_checked_in:
+        addon_qs = addon_qs.filter(Exists(Checkin.objects.filter(position=OuterRef('pk'))), canceled=False)
+    addons = [p for p in addon_qs if not p.canceled]
+
     for pos in addons:
         itemcount[pos.item, pos.variation] += 1
 

src/pretix/base/services/export.py

@@ -40,6 +40,7 @@ from pretix.base.models import (
     CachedFile, Device, Event, Organizer, ScheduledEventExport, TeamAPIToken,
     User, cachedfile_name,
 )
+from pretix.base.models.auth import UserWithStaffSession
 from pretix.base.models.exports import ScheduledOrganizerExport
 from pretix.base.services.mail import mail
 from pretix.base.services.tasks import (
@@ -211,7 +212,12 @@ def init_event_exporters(event, user=None, token=None, device=None, request=None
         if not perm_holder.has_event_permission(event.organizer, event, permission_name, request) and not staff_session:
             continue
 
-        exporter: BaseExporter = response(event=event, organizer=event.organizer, **kwargs)
+        exporter: BaseExporter = response(
+            event=event,
+            organizer=event.organizer,
+            permission_holder=token or device or (UserWithStaffSession(user) if staff_session else user),
+            **kwargs
+        )
 
         if not exporter.available_for_user(user if user and user.is_authenticated else None):
             continue
@@ -243,7 +249,12 @@ def init_organizer_exporters(
             continue
 
         if issubclass(response, OrganizerLevelExportMixin):
-            exporter: BaseExporter = response(event=Event.objects.none(), organizer=organizer, **kwargs)
+            exporter: BaseExporter = response(
+                event=Event.objects.none(),
+                organizer=organizer,
+                permission_holder=token or device or (UserWithStaffSession(user) if staff_session else user),
+                **kwargs,
+            )
 
             try:
                 if not perm_holder.has_organizer_permission(organizer, response.get_required_organizer_permission(), request) and not staff_session:
@@ -295,7 +306,12 @@ def init_organizer_exporters(
             if not _has_permission_on_any_team_cache[permission_name] and not staff_session:
                 continue
 
-            exporter: BaseExporter = response(event=_event_list_cache[permission_name], organizer=organizer, **kwargs)
+            exporter: BaseExporter = response(
+                event=_event_list_cache[permission_name],
+                organizer=organizer,
+                permission_holder=token or device or (UserWithStaffSession(user) if staff_session else user),
+                **kwargs,
+            )
 
         if not exporter.available_for_user(user if user and user.is_authenticated else None):
             continue

src/pretix/base/services/orders.py

@@ -67,9 +67,9 @@ from pretix.base.email import get_email_context
 from pretix.base.i18n import get_language_without_region, language
 from pretix.base.media import MEDIA_TYPES
 from pretix.base.models import (
-    CartPosition, Device, Event, GiftCard, Item, ItemVariation, Membership,
-    Order, OrderPayment, OrderPosition, Quota, Seat, SeatCategoryMapping, User,
-    Voucher,
+    CartPosition, Device, Event, GiftCard, Item, ItemVariation, LogEntry,
+    Membership, Order, OrderPayment, OrderPosition, Quota, Seat,
+    SeatCategoryMapping, User, Voucher,
 )
 from pretix.base.models.event import SubEvent
 from pretix.base.models.orders import (
@@ -727,8 +727,6 @@ def _check_positions(event: Event, now_dt: datetime, time_machine_now_dt: dateti
     _check_date(event, time_machine_now_dt)
 
     products_seen = Counter()
-    q_avail = Counter()
-    v_avail = Counter()
     v_usages = Counter()
     v_budget = {}
     deleted_positions = set()
@@ -793,6 +791,9 @@ def _check_positions(event: Event, now_dt: datetime, time_machine_now_dt: dateti
                 shared_lock_objects=[event]
             )
 
+    q_avail = Counter()
+    v_avail = Counter()
+
     # Check maximum order size
     limit = min(int(event.settings.max_items_per_order), settings.PRETIX_MAX_ORDER_SIZE)
     if sum(1 for cp in sorted_positions if not cp.addon_to) > limit:
@@ -1618,7 +1619,7 @@ class OrderChangeManager:
     MembershipOperation = namedtuple('MembershipOperation', ('position', 'membership'))
     CancelOperation = namedtuple('CancelOperation', ('position', 'price_diff'))
     AddOperation = namedtuple('AddOperation', ('item', 'variation', 'price', 'addon_to', 'subevent', 'seat', 'membership',
-                                               'valid_from', 'valid_until', 'is_bundled', 'result'))
+                                               'valid_from', 'valid_until', 'is_bundled', 'result', 'count'))
     SplitOperation = namedtuple('SplitOperation', ('position',))
     FeeValueOperation = namedtuple('FeeValueOperation', ('fee', 'value', 'price_diff'))
     AddFeeOperation = namedtuple('AddFeeOperation', ('fee', 'price_diff'))
@@ -1632,16 +1633,24 @@ class OrderChangeManager:
     ForceRecomputeOperation = namedtuple('ForceRecomputeOperation', tuple())
 
     class AddPositionResult:
-        _position: Optional[OrderPosition]
+        _positions: Optional[List[OrderPosition]]
 
         def __init__(self):
-            self._position = None
+            self._positions = None
 
         @property
         def position(self) -> OrderPosition:
-            if self._position is None:
+            if self._positions is None:
                 raise RuntimeError("Order position has not been created yet. Call commit() first on OrderChangeManager.")
-            return self._position
+            if len(self._positions) != 1:
+                raise RuntimeError("More than one position created.")
+            return self._positions[0]
+
+        @property
+        def positions(self) -> List[OrderPosition]:
+            if self._positions is None:
+                raise RuntimeError("Order position has not been created yet. Call commit() first on OrderChangeManager.")
+            return self._positions
 
     def __init__(self, order: Order, user=None, auth=None, notify=True, reissue_invoice=True, allow_blocked_seats=False):
         self.order = order
@@ -1848,8 +1857,12 @@ class OrderChangeManager:
 
     def add_position(self, item: Item, variation: ItemVariation, price: Decimal, addon_to: OrderPosition = None,
                      subevent: SubEvent = None, seat: Seat = None, membership: Membership = None,
-                     valid_from: datetime = None, valid_until: datetime = None) -> 'OrderChangeManager.AddPositionResult':
+                     valid_from: datetime = None, valid_until: datetime = None, count: int = 1) -> 'OrderChangeManager.AddPositionResult':
+        if count < 1:
+            raise ValueError("Count must be positive")
         if isinstance(seat, str):
+            if count > 1:
+                raise ValueError("Cannot combine count > 1 with seat")
             if not seat:
                 seat = None
             else:
@@ -1903,14 +1916,14 @@ class OrderChangeManager:
         if self.order.event.settings.invoice_include_free or price.gross != Decimal('0.00'):
             self._invoice_dirty = True
 
-        self._totaldiff_guesstimate += price.gross
-        self._quotadiff.update(new_quotas)
+        self._totaldiff_guesstimate += price.gross * count
+        self._quotadiff.update({q: count for q in new_quotas})
         if seat:
             self._seatdiff.update([seat])
 
         result = self.AddPositionResult()
         self._operations.append(self.AddOperation(item, variation, price, addon_to, subevent, seat, membership,
-                                                  valid_from, valid_until, is_bundled, result))
+                                                  valid_from, valid_until, is_bundled, result, count))
         return result
 
     def split(self, position: OrderPosition):
@@ -2530,29 +2543,35 @@ class OrderChangeManager:
                     secret_dirty.remove(position)
                 position.save(update_fields=['canceled', 'secret'])
             elif isinstance(op, self.AddOperation):
-                pos = OrderPosition.objects.create(
-                    item=op.item, variation=op.variation, addon_to=op.addon_to,
-                    price=op.price.gross, order=self.order, tax_rate=op.price.rate, tax_code=op.price.code,
-                    tax_value=op.price.tax, tax_rule=op.item.tax_rule,
-                    positionid=nextposid, subevent=op.subevent, seat=op.seat,
-                    used_membership=op.membership, valid_from=op.valid_from, valid_until=op.valid_until,
-                    is_bundled=op.is_bundled,
-                )
-                nextposid += 1
-                self.order.log_action('pretix.event.order.changed.add', user=self.user, auth=self.auth, data={
-                    'position': pos.pk,
-                    'item': op.item.pk,
-                    'variation': op.variation.pk if op.variation else None,
-                    'addon_to': op.addon_to.pk if op.addon_to else None,
-                    'price': op.price.gross,
-                    'positionid': pos.positionid,
-                    'membership': pos.used_membership_id,
-                    'subevent': op.subevent.pk if op.subevent else None,
-                    'seat': op.seat.pk if op.seat else None,
-                    'valid_from': op.valid_from.isoformat() if op.valid_from else None,
-                    'valid_until': op.valid_until.isoformat() if op.valid_until else None,
-                })
-                op.result._position = pos
+                new_pos = []
+                new_logs = []
+                for i in range(op.count):
+                    pos = OrderPosition.objects.create(
+                        item=op.item, variation=op.variation, addon_to=op.addon_to,
+                        price=op.price.gross, order=self.order, tax_rate=op.price.rate, tax_code=op.price.code,
+                        tax_value=op.price.tax, tax_rule=op.item.tax_rule,
+                        positionid=nextposid, subevent=op.subevent, seat=op.seat,
+                        used_membership=op.membership, valid_from=op.valid_from, valid_until=op.valid_until,
+                        is_bundled=op.is_bundled,
+                    )
+                    nextposid += 1
+                    new_pos.append(pos)
+                    new_logs.append(self.order.log_action('pretix.event.order.changed.add', user=self.user, auth=self.auth, data={
+                        'position': pos.pk,
+                        'item': op.item.pk,
+                        'variation': op.variation.pk if op.variation else None,
+                        'addon_to': op.addon_to.pk if op.addon_to else None,
+                        'price': op.price.gross,
+                        'positionid': pos.positionid,
+                        'membership': pos.used_membership_id,
+                        'subevent': op.subevent.pk if op.subevent else None,
+                        'seat': op.seat.pk if op.seat else None,
+                        'valid_from': op.valid_from.isoformat() if op.valid_from else None,
+                        'valid_until': op.valid_until.isoformat() if op.valid_until else None,
+                    }, save=False))
+
+                op.result._positions = new_pos
+                LogEntry.bulk_create_and_postprocess(new_logs)
             elif isinstance(op, self.SplitOperation):
                 position = position_cache.setdefault(op.position.pk, op.position)
                 split_positions.append(position)
@@ -2877,7 +2896,7 @@ class OrderChangeManager:
         return total
 
     def _check_order_size(self):
-        if (len(self.order.positions.all()) + len([op for op in self._operations if isinstance(op, self.AddOperation)])) > settings.PRETIX_MAX_ORDER_SIZE:
+        if (len(self.order.positions.all()) + sum([op.count for op in self._operations if isinstance(op, self.AddOperation)])) > settings.PRETIX_MAX_ORDER_SIZE:
             raise OrderError(
                 self.error_messages['max_order_size'] % {
                     'max': settings.PRETIX_MAX_ORDER_SIZE,
@@ -2938,7 +2957,7 @@ class OrderChangeManager:
         ]) + len([
             o for o in self._operations if isinstance(o, self.SplitOperation)
         ])
-        adds = len([o for o in self._operations if isinstance(o, self.AddOperation)])
+        adds = sum([o.count for o in self._operations if isinstance(o, self.AddOperation)])
         if current > 0 and current - cancels + adds < 1:
             raise OrderError(self.error_messages['complete_cancel'])
 
@@ -2985,17 +3004,18 @@ class OrderChangeManager:
             elif isinstance(op, self.CancelOperation) and op.position in positions_to_fake_cart:
                 fake_cart.remove(positions_to_fake_cart[op.position])
             elif isinstance(op, self.AddOperation):
-                cp = CartPosition(
-                    event=self.event,
-                    item=op.item,
-                    variation=op.variation,
-                    used_membership=op.membership,
-                    subevent=op.subevent,
-                    seat=op.seat,
-                )
-                cp.override_valid_from = op.valid_from
-                cp.override_valid_until = op.valid_until
-                fake_cart.append(cp)
+                for i in range(op.count):
+                    cp = CartPosition(
+                        event=self.event,
+                        item=op.item,
+                        variation=op.variation,
+                        used_membership=op.membership,
+                        subevent=op.subevent,
+                        seat=op.seat,
+                    )
+                    cp.override_valid_from = op.valid_from
+                    cp.override_valid_until = op.valid_until
+                    fake_cart.append(cp)
         try:
             validate_memberships_in_order(self.order.customer, fake_cart, self.event, lock=True, ignored_order=self.order, testmode=self.order.testmode)
         except ValidationError as e:

src/pretix/control/forms/orders.py

@@ -331,6 +331,10 @@ class OtherOperationsForm(forms.Form):
 
 
 class OrderPositionAddForm(forms.Form):
+    count = forms.IntegerField(
+        label=_('Number of products to add'),
+        initial=1,
+    )
     itemvar = forms.ChoiceField(
         label=_('Product')
     )
@@ -432,6 +436,10 @@ class OrderPositionAddForm(forms.Form):
             d['used_membership'] = [m for m in self.memberships if str(m.pk) == d['used_membership']][0]
         else:
             d['used_membership'] = None
+        if d.get("count", 1) > 1 and d.get("seat"):
+            raise ValidationError({
+                "seat": _("You can not choose a seat when adding multiple products at once.")
+            })
         return d
 
 

src/pretix/control/templates/pretixcontrol/order/change.html

@@ -329,6 +329,7 @@
                                         {{ add_form.custom_error }}
                                     </div>
                                 {% endif %}
+                                {% bootstrap_field add_form.count layout="control" %}
                                 {% bootstrap_field add_form.itemvar layout="control" %}
                                 {% bootstrap_field add_form.price addon_after=request.event.currency layout="control" %}
                                 {% if add_form.addon_to %}
@@ -364,6 +365,7 @@
                         </div>
                         <div class="panel-body">
                             <div class="form-horizontal">
+                                {% bootstrap_field add_position_formset.empty_form.count layout="control" %}
                                 {% bootstrap_field add_position_formset.empty_form.itemvar layout="control" %}
                                 {% bootstrap_field add_position_formset.empty_form.price addon_after=request.event.currency layout="control" %}
                                 {% if add_position_formset.empty_form.addon_to %}

src/pretix/control/views/orders.py

@@ -2059,12 +2059,13 @@ class OrderChange(OrderView):
                 else:
                     variation = None
                 try:
-                    ocm.add_position(item, variation,
-                                     f.cleaned_data['price'],
-                                     f.cleaned_data.get('addon_to'),
-                                     f.cleaned_data.get('subevent'),
-                                     f.cleaned_data.get('seat'),
-                                     f.cleaned_data.get('used_membership'))
+                    for i in range(f.cleaned_data.get("count", 1)):
+                        ocm.add_position(item, variation,
+                                         f.cleaned_data['price'],
+                                         f.cleaned_data.get('addon_to'),
+                                         f.cleaned_data.get('subevent'),
+                                         f.cleaned_data.get('seat'),
+                                         f.cleaned_data.get('used_membership'))
                 except OrderError as e:
                     f.custom_error = str(e)
                     return False

src/pretix/control/views/organizer.py

@@ -1322,7 +1322,7 @@ class DeviceUpdateView(OrganizerDetailViewMixin, OrganizerPermissionRequiredMixi
     def form_valid(self, form):
         if form.has_changed():
             self.object.log_action('pretix.device.changed', user=self.request.user, data={
-                k: getattr(self.object, k) if k != 'limit_events' else [e.id for e in getattr(self.object, k).all()]
+                k: form.cleaned_data[k] if k != 'limit_events' else [e.id for e in form.cleaned_data[k]]
                 for k in form.changed_data
             })
 

src/pretix/locale/es/LC_MESSAGES/django.po

@@ -8,7 +8,7 @@ msgstr ""
 "Project-Id-Version: PACKAGE VERSION\n"
 "Report-Msgid-Bugs-To: \n"
 "POT-Creation-Date: 2026-03-30 11:22+0000\n"
-"PO-Revision-Date: 2026-03-18 12:23+0000\n"
+"PO-Revision-Date: 2026-03-31 17:00+0000\n"
 "Last-Translator: CVZ-es <damien.bremont@casadevelazquez.org>\n"
 "Language-Team: Spanish <https://translate.pretix.eu/projects/pretix/pretix/"
 "es/>\n"
@@ -13331,7 +13331,7 @@ msgstr ""
 #: pretix/base/settings.py:4157
 #, python-brace-format
 msgid "VAT-ID is not supported for \"{}\"."
-msgstr ""
+msgstr "El NIF no es compatible con «{}»."
 
 #: pretix/base/settings.py:4164
 msgid "The last payment date cannot be before the end of presale."
@@ -27567,28 +27567,30 @@ msgid "Add a two-factor authentication device"
 msgstr "Añadir un dispositivo de autenticación de dos factores"
 
 #: pretix/control/templates/pretixcontrol/user/2fa_add.html:19
-#, fuzzy
-#| msgid "Smartphone with the Authenticator application"
 msgid "Smartphone with Authenticator app"
-msgstr "Celular con aplicación de autenticación"
+msgstr "Smartphone con la aplicación Authenticator"
 
 #: pretix/control/templates/pretixcontrol/user/2fa_add.html:21
 msgid ""
 "Use your smartphone with any Time-based One-Time-Password app like freeOTP, "
 "Google Authenticator or Proton Authenticator."
 msgstr ""
+"Use su smartphone con cualquier aplicación de contraseñas de un solo uso "
+"basadas en el tiempo, como freeOTP, Google Authenticator o Proton "
+"Authenticator."
 
 #: pretix/control/templates/pretixcontrol/user/2fa_add.html:30
-#, fuzzy
-#| msgid "WebAuthn-compatible hardware token (e.g. Yubikey)"
 msgid "WebAuthn-compatible hardware token"
-msgstr "Hardware compatible con token WebAuthn (p. ej. Yubikey)"
+msgstr "Token físico compatible con WebAuthn"
 
 #: pretix/control/templates/pretixcontrol/user/2fa_add.html:32
 msgid ""
 "Use a hardware token like the Yubikey, or other biometric authentication "
 "like fingerprint or face recognition."
 msgstr ""
+"Utiliza un dispositivo de seguridad físico, como el Yubikey, u otro método "
+"de autenticación biométrica, como el reconocimiento de huellas dactilares o "
+"facial."
 
 #: pretix/control/templates/pretixcontrol/user/2fa_confirm_totp.html:8
 msgid "To set up this device, please follow the following steps:"

src/pretix/locale/fr/LC_MESSAGES/django.po

@@ -4,10 +4,10 @@ msgstr ""
 "Project-Id-Version: 1\n"
 "Report-Msgid-Bugs-To: \n"
 "POT-Creation-Date: 2026-03-30 11:22+0000\n"
-"PO-Revision-Date: 2026-03-18 12:23+0000\n"
+"PO-Revision-Date: 2026-03-31 17:00+0000\n"
 "Last-Translator: CVZ-es <damien.bremont@casadevelazquez.org>\n"
-"Language-Team: French <https://translate.pretix.eu/projects/pretix/pretix/fr/"
-">\n"
+"Language-Team: French <https://translate.pretix.eu/projects/pretix/pretix/"
+"fr/>\n"
 "Language: fr\n"
 "MIME-Version: 1.0\n"
 "Content-Type: text/plain; charset=UTF-8\n"
@@ -13454,7 +13454,7 @@ msgstr ""
 #: pretix/base/settings.py:4157
 #, python-brace-format
 msgid "VAT-ID is not supported for \"{}\"."
-msgstr ""
+msgstr "Le numéro de TVA n'est pas pris en charge pour « {} »."
 
 #: pretix/base/settings.py:4164
 msgid "The last payment date cannot be before the end of presale."
@@ -27774,28 +27774,30 @@ msgid "Add a two-factor authentication device"
 msgstr "Ajouter un dispositif d'authentification à deux facteurs"
 
 #: pretix/control/templates/pretixcontrol/user/2fa_add.html:19
-#, fuzzy
-#| msgid "Smartphone with the Authenticator application"
 msgid "Smartphone with Authenticator app"
-msgstr "Smartphone avec l'application Authenticator"
+msgstr "Smartphone équipé de l'application Authenticator"
 
 #: pretix/control/templates/pretixcontrol/user/2fa_add.html:21
 msgid ""
 "Use your smartphone with any Time-based One-Time-Password app like freeOTP, "
 "Google Authenticator or Proton Authenticator."
 msgstr ""
+"Utilisez votre smartphone avec n'importe quelle application de mots de passe "
+"à usage unique générés en temps réel, comme freeOTP, Google Authenticator ou "
+"Proton Authenticator."
 
 #: pretix/control/templates/pretixcontrol/user/2fa_add.html:30
-#, fuzzy
-#| msgid "WebAuthn-compatible hardware token (e.g. Yubikey)"
 msgid "WebAuthn-compatible hardware token"
-msgstr "Token matériel compatible WebAuthn (par ex. Yubikey)"
+msgstr "Token matériel compatible WebAuthn"
 
 #: pretix/control/templates/pretixcontrol/user/2fa_add.html:32
 msgid ""
 "Use a hardware token like the Yubikey, or other biometric authentication "
 "like fingerprint or face recognition."
 msgstr ""
+"Utilisez une clé matérielle telle que la Yubikey, ou un autre moyen "
+"d'authentification biométrique, comme la reconnaissance d'empreintes "
+"digitales ou faciale."
 
 #: pretix/control/templates/pretixcontrol/user/2fa_confirm_totp.html:8
 msgid "To set up this device, please follow the following steps:"

src/pretix/locale/nl/LC_MESSAGES/django.po

@@ -7,10 +7,10 @@ msgstr ""
 "Project-Id-Version: 1\n"
 "Report-Msgid-Bugs-To: \n"
 "POT-Creation-Date: 2026-03-30 11:22+0000\n"
-"PO-Revision-Date: 2026-03-18 12:23+0000\n"
+"PO-Revision-Date: 2026-03-31 17:00+0000\n"
 "Last-Translator: Ruud Hendrickx <ruud@leckxicon.eu>\n"
-"Language-Team: Dutch <https://translate.pretix.eu/projects/pretix/pretix/nl/"
-">\n"
+"Language-Team: Dutch <https://translate.pretix.eu/projects/pretix/pretix/nl/>"
+"\n"
 "Language: nl\n"
 "MIME-Version: 1.0\n"
 "Content-Type: text/plain; charset=UTF-8\n"
@@ -13283,7 +13283,7 @@ msgstr ""
 #: pretix/base/settings.py:4157
 #, python-brace-format
 msgid "VAT-ID is not supported for \"{}\"."
-msgstr ""
+msgstr "Btw-nummer wordt niet ondersteund voor \"{}\"."
 
 #: pretix/base/settings.py:4164
 msgid "The last payment date cannot be before the end of presale."
@@ -27461,28 +27461,28 @@ msgid "Add a two-factor authentication device"
 msgstr "Twee-factor-authenticatieapparaat toevoegen"
 
 #: pretix/control/templates/pretixcontrol/user/2fa_add.html:19
-#, fuzzy
-#| msgid "Smartphone with the Authenticator application"
 msgid "Smartphone with Authenticator app"
-msgstr "Smartphone met de Authenticator-applicatie"
+msgstr "Smartphone met Authenticator-app"
 
 #: pretix/control/templates/pretixcontrol/user/2fa_add.html:21
 msgid ""
 "Use your smartphone with any Time-based One-Time-Password app like freeOTP, "
 "Google Authenticator or Proton Authenticator."
 msgstr ""
+"Gebruik uw smartphone met een willekeurige app voor tijdgebonden eenmalige "
+"wachtwoorden, zoals freeOTP, Google Authenticator of Proton Authenticator."
 
 #: pretix/control/templates/pretixcontrol/user/2fa_add.html:30
-#, fuzzy
-#| msgid "WebAuthn-compatible hardware token (e.g. Yubikey)"
 msgid "WebAuthn-compatible hardware token"
-msgstr "WebAuthn-compatibel hardware-token (bijvoorbeeld Yubikey)"
+msgstr "WebAuthn-compatibel hardwaretoken"
 
 #: pretix/control/templates/pretixcontrol/user/2fa_add.html:32
 msgid ""
 "Use a hardware token like the Yubikey, or other biometric authentication "
 "like fingerprint or face recognition."
 msgstr ""
+"Gebruik een hardwaretoken zoals de Yubikey, of een andere vorm van "
+"biometrische authenticatie, zoals vingerafdruk- of gezichtsherkenning."
 
 #: pretix/control/templates/pretixcontrol/user/2fa_confirm_totp.html:8
 msgid "To set up this device, please follow the following steps:"

src/pretix/locale/nl_Informal/LC_MESSAGES/django.po

@@ -8,7 +8,7 @@ msgstr ""
 "Project-Id-Version: PACKAGE VERSION\n"
 "Report-Msgid-Bugs-To: \n"
 "POT-Creation-Date: 2026-03-30 11:22+0000\n"
-"PO-Revision-Date: 2026-03-18 14:50+0000\n"
+"PO-Revision-Date: 2026-03-31 17:00+0000\n"
 "Last-Translator: Ruud Hendrickx <ruud@leckxicon.eu>\n"
 "Language-Team: Dutch (informal) <https://translate.pretix.eu/projects/pretix/"
 "pretix/nl_Informal/>\n"
@@ -13314,7 +13314,7 @@ msgstr ""
 #: pretix/base/settings.py:4157
 #, python-brace-format
 msgid "VAT-ID is not supported for \"{}\"."
-msgstr ""
+msgstr "Btw-nummer wordt niet ondersteund voor \"{}\"."
 
 #: pretix/base/settings.py:4164
 msgid "The last payment date cannot be before the end of presale."
@@ -27518,28 +27518,28 @@ msgid "Add a two-factor authentication device"
 msgstr "Twee-factor-authenticatieapparaat toevoegen"
 
 #: pretix/control/templates/pretixcontrol/user/2fa_add.html:19
-#, fuzzy
-#| msgid "Smartphone with the Authenticator application"
 msgid "Smartphone with Authenticator app"
-msgstr "Smartphone met de Authenticator-applicatie"
+msgstr "Smartphone met Authenticator-app"
 
 #: pretix/control/templates/pretixcontrol/user/2fa_add.html:21
 msgid ""
 "Use your smartphone with any Time-based One-Time-Password app like freeOTP, "
 "Google Authenticator or Proton Authenticator."
 msgstr ""
+"Gebruik je smartphone met een willekeurige app voor tijdgebonden eenmalige "
+"wachtwoorden, zoals freeOTP, Google Authenticator of Proton Authenticator."
 
 #: pretix/control/templates/pretixcontrol/user/2fa_add.html:30
-#, fuzzy
-#| msgid "WebAuthn-compatible hardware token (e.g. Yubikey)"
 msgid "WebAuthn-compatible hardware token"
-msgstr "WebAuthn-compatibel hardware-token (bijvoorbeeld Yubikey)"
+msgstr "WebAuthn-compatibel hardwaretoken"
 
 #: pretix/control/templates/pretixcontrol/user/2fa_add.html:32
 msgid ""
 "Use a hardware token like the Yubikey, or other biometric authentication "
 "like fingerprint or face recognition."
 msgstr ""
+"Gebruik een hardwaretoken zoals de Yubikey, of een andere vorm van "
+"biometrische authenticatie, zoals vingerafdruk- of gezichtsherkenning."
 
 #: pretix/control/templates/pretixcontrol/user/2fa_confirm_totp.html:8
 msgid "To set up this device, please follow the following steps:"

src/pretix/locale/pt_BR/LC_MESSAGES/django.po

@@ -8,7 +8,7 @@ msgstr ""
 "Project-Id-Version: PACKAGE VERSION\n"
 "Report-Msgid-Bugs-To: \n"
 "POT-Creation-Date: 2026-03-30 11:22+0000\n"
-"PO-Revision-Date: 2026-03-25 08:00+0000\n"
+"PO-Revision-Date: 2026-03-30 21:00+0000\n"
 "Last-Translator: Renne Rocha <renne@rocha.dev.br>\n"
 "Language-Team: Portuguese (Brazil) <https://translate.pretix.eu/projects/"
 "pretix/pretix/pt_BR/>\n"
@@ -19613,7 +19613,7 @@ msgstr "Excluir"
 #: pretix/plugins/banktransfer/templates/pretixplugins/banktransfer/import_form.html:91
 #: pretix/presale/templates/pretixpresale/fragment_event_list_filter.html:22
 msgid "Filter"
-msgstr "Filtro"
+msgstr "Filtrar"
 
 #: pretix/control/templates/pretixcontrol/checkin/checkins.html:50
 msgid "Your search did not match any check-ins."
@@ -28003,6 +28003,9 @@ msgid ""
 "According to your event settings, sold out products are hidden from "
 "customers. This way, customers will not be able to discover the waiting list."
 msgstr ""
+"De acordo com as configurações do seu evento, os produtos esgotados ficam "
+"ocultos para os clientes. Dessa forma, os clientes não poderão descobrir a "
+"lista de espera."
 
 #: pretix/control/templates/pretixcontrol/waitinglist/index.html:38
 msgid "Send vouchers"
@@ -28049,6 +28052,9 @@ msgid ""
 "waiting list in, you could sell tickets worth an additional "
 "<strong>%(amount)s</strong>."
 msgstr ""
+"Se você conseguir criar espaço suficiente em seu evento para acomodar todas "
+"as pessoas na lista de espera, poderá vender ingressos no valor de um "
+"adicional de <strong>%(amount)s</strong>."
 
 #: pretix/control/templates/pretixcontrol/waitinglist/index.html:115
 msgid "Successfully redeemed"

src/pretix/presale/forms/customer.py

@@ -296,7 +296,8 @@ class SetPasswordForm(forms.Form):
     }
     email = forms.EmailField(
         label=_('Email'),
-        disabled=True
+        widget=forms.EmailInput(attrs={'autocomplete': 'username', 'readonly': 'readonly'}),
+        required=False,
     )
     password = forms.CharField(
         label=_('Password'),

src/pretix/presale/views/__init__.py

@@ -70,18 +70,21 @@ def cached_invoice_address(request):
             # do not create a session, if we don't have a session we also don't have an invoice address ;)
             request._checkout_flow_invoice_address = InvoiceAddress()
             return request._checkout_flow_invoice_address
-        cs = cart_session(request)
-        iapk = cs.get('invoice_address')
-        if not iapk:
+        cs = cart_session(request, create=False)
+        if cs is None:
             request._checkout_flow_invoice_address = InvoiceAddress()
         else:
-            try:
-                with scopes_disabled():
-                    request._checkout_flow_invoice_address = InvoiceAddress.objects.get(
-                        pk=iapk, order__isnull=True
-                    )
-            except InvoiceAddress.DoesNotExist:
+            iapk = cs.get('invoice_address')
+            if not iapk:
                 request._checkout_flow_invoice_address = InvoiceAddress()
+            else:
+                try:
+                    with scopes_disabled():
+                        request._checkout_flow_invoice_address = InvoiceAddress.objects.get(
+                            pk=iapk, order__isnull=True
+                        )
+                except InvoiceAddress.DoesNotExist:
+                    request._checkout_flow_invoice_address = InvoiceAddress()
     return request._checkout_flow_invoice_address
 
 
@@ -111,6 +114,12 @@ class CartMixin:
         return cached_invoice_address(self.request)
 
     def get_cart(self, answers=False, queryset=None, order=None, downloads=False, payments=None):
+        if not self.request.session.session_key and not order:
+            # The user has not even a session ID yet, so they can't have a cart and we can save a lot of work
+            return {
+                'positions': [],
+                # Other keys are not used on non-checkout pages
+            }
         if queryset is not None:
             prefetch = []
             if answers:
@@ -166,7 +175,8 @@ class CartMixin:
         else:
             fees = []
 
-        if not order:
+        if not order and lcp:
+            # Do not re-round for empty cart (useless) or confirmed order (incorrect)
             apply_rounding(self.request.event.settings.tax_rounding, self.invoice_address, self.request.event.currency, [*lcp, *fees])
 
         total = sum([c.price for c in lcp]) + sum([f.value for f in fees])
@@ -277,6 +287,12 @@ class CartMixin:
         }
 
     def current_selected_payments(self, positions, fees, invoice_address, *, warn=False):
+        from pretix.presale.views.cart import get_or_create_cart_id
+
+        if not get_or_create_cart_id(self.request, create=False):
+            # No active cart ID, no payments there
+            return []
+
         raw_payments = copy.deepcopy(self.cart_session.get('payments', []))
         fees = [f for f in fees if f.fee_type != OrderFee.FEE_TYPE_PAYMENT]  # we re-compute these here
 

src/pretix/presale/views/cart.py

@@ -417,7 +417,7 @@ def get_or_create_cart_id(request, create=True):
     return new_id
 
 
-def cart_session(request):
+def cart_session(request, create=True):
     """
     Before pretix 1.8.0, all checkout-related information (like the entered email address) was stored
     in the user's regular session dictionary. This led to data interference and leaks for example if a
@@ -428,7 +428,9 @@ def cart_session(request):
     active cart session sub-dictionary for read and write access.
     """
     request.session.modified = True
-    cart_id = get_or_create_cart_id(request)
+    cart_id = get_or_create_cart_id(request, create=create)
+    if not cart_id and not create:
+        return None
     return request.session['carts'][cart_id]
 
 

src/pretix/settings.py

@@ -157,7 +157,7 @@ DATABASES = {
         'HOST': config.get('database', 'host', fallback=''),
         'PORT': config.get('database', 'port', fallback=''),
         'CONN_MAX_AGE': 0 if db_backend == 'sqlite3' else 120,
-        'CONN_HEALTH_CHECKS': db_backend != 'sqlite3',  # Will only be used from Django 4.1 onwards
+        'CONN_HEALTH_CHECKS': db_backend != 'sqlite3',
         'DISABLE_SERVER_SIDE_CURSORS': db_disable_server_side_cursors,
         'OPTIONS': db_options,
         'TEST': {}
@@ -179,6 +179,21 @@ if config.has_section('replica'):
     }
     DATABASE_ROUTERS = ['pretix.helpers.database.ReplicaRouter']
 
+if config.has_section('dbreadonly'):
+    DATABASES['readonly'] = {
+        'ENGINE': 'django.db.backends.' + db_backend,
+        'NAME': config.get('dbreadonly', 'name', fallback=DATABASES['default']['NAME']),
+        'USER': config.get('dbreadonly', 'user', fallback=DATABASES['default']['USER']),
+        'PASSWORD': config.get('dbreadonly', 'password', fallback=DATABASES['default']['PASSWORD']),
+        'HOST': config.get('dbreadonly', 'host', fallback=DATABASES['default']['HOST']),
+        'PORT': config.get('dbreadonly', 'port', fallback=DATABASES['default']['PORT']),
+        'CONN_MAX_AGE': 0,  # do not spam primary with open connections as long as readonly is only used occasionally
+        'CONN_HEALTH_CHECKS': db_backend != 'sqlite3',
+        'DISABLE_SERVER_SIDE_CURSORS': db_disable_server_side_cursors,
+        'OPTIONS': db_options,
+        'TEST': {}
+    }
+
 STATIC_URL = config.get('urls', 'static', fallback='/static/')
 
 MEDIA_URL = config.get('urls', 'media', fallback='/media/')

src/tests/api/test_orders.py

@@ -2053,7 +2053,7 @@ def test_pdf_data(token_client, organizer, event, order, django_assert_max_num_q
     assert not resp.data['positions'][0].get('pdf_data')
 
     # order list
-    with django_assert_max_num_queries(33):
+    with django_assert_max_num_queries(34):
         resp = token_client.get('/api/v1/organizers/{}/events/{}/orders/?pdf_data=true'.format(
             organizer.slug, event.slug
         ))
@@ -2068,7 +2068,7 @@ def test_pdf_data(token_client, organizer, event, order, django_assert_max_num_q
     assert not resp.data['results'][0]['positions'][0].get('pdf_data')
 
     # position list
-    with django_assert_max_num_queries(35):
+    with django_assert_max_num_queries(36):
         resp = token_client.get('/api/v1/organizers/{}/events/{}/orderpositions/?pdf_data=true'.format(
             organizer.slug, event.slug
         ))

src/tests/base/test_modelimport_orders.py

@@ -991,3 +991,30 @@ def test_import_mixed_order_size_consistency(user, event, item):
         ).get()
     assert ('Inconsistent data in row 2: Column Email address contains value "a2@example.com", but for this order, '
             'the value has already been set to "a1@example.com".') in str(excinfo.value)
+
+
+@pytest.mark.django_db
+@scopes_disabled()
+def test_import_line_endings_mix(event, item, user):
+    # Ensures import works with mixed file endings.
+    # See Ticket#23230806 where a file to import ends with \r\n
+    settings = dict(DEFAULT_SETTINGS)
+    settings['item'] = 'static:{}'.format(item.pk)
+
+    cf = inputfile_factory()
+    file = cf.file
+    file.seek(0)
+    data = file.read()
+    data = data.replace(b'\n', b'\r')
+    data = data.rstrip(b'\r\r')
+    data = data + b'\r\n'
+
+    print(data)
+    cf.file.save("input.csv", ContentFile(data))
+    cf.save()
+
+    import_orders.apply(
+        args=(event.pk, cf.id, settings, 'en', user.pk)
+    )
+    assert event.orders.count() == 3
+    assert OrderPosition.objects.count() == 3

src/tests/base/test_notifications.py

@@ -24,7 +24,6 @@ from decimal import Decimal
 
 import pytest
 from django.core import mail as djmail
-from django.db import transaction
 from django.utils.timezone import now
 from django_scopes import scope
 
@@ -75,47 +74,42 @@ def user(team):
     return user
 
 
-@pytest.fixture
-def monkeypatch_on_commit(monkeypatch):
-    monkeypatch.setattr("django.db.transaction.on_commit", lambda t: t())
-
-
 @pytest.mark.django_db
-def test_notification_trigger_event_specific(event, order, user, monkeypatch_on_commit):
+def test_notification_trigger_event_specific(event, order, user, django_capture_on_commit_callbacks):
     djmail.outbox = []
     user.notification_settings.create(
         method='mail', event=event, action_type='pretix.event.order.paid', enabled=True
     )
-    with transaction.atomic():
+    with django_capture_on_commit_callbacks(execute=True):
         order.log_action('pretix.event.order.paid', {})
     assert len(djmail.outbox) == 1
     assert djmail.outbox[0].subject.endswith("DUMMY: Order FOO has been marked as paid.")
 
 
 @pytest.mark.django_db
-def test_notification_trigger_global(event, order, user, monkeypatch_on_commit):
+def test_notification_trigger_global(event, order, user, django_capture_on_commit_callbacks):
     djmail.outbox = []
     user.notification_settings.create(
         method='mail', event=None, action_type='pretix.event.order.paid', enabled=True
     )
-    with transaction.atomic():
+    with django_capture_on_commit_callbacks(execute=True):
         order.log_action('pretix.event.order.paid', {})
     assert len(djmail.outbox) == 1
 
 
 @pytest.mark.django_db
-def test_notification_trigger_global_wildcard(event, order, user, monkeypatch_on_commit):
+def test_notification_trigger_global_wildcard(event, order, user, django_capture_on_commit_callbacks):
     djmail.outbox = []
     user.notification_settings.create(
         method='mail', event=None, action_type='pretix.event.order.changed.*', enabled=True
     )
-    with transaction.atomic():
+    with django_capture_on_commit_callbacks(execute=True):
         order.log_action('pretix.event.order.changed.item', {})
     assert len(djmail.outbox) == 1
 
 
 @pytest.mark.django_db
-def test_notification_enabled_global_ignored_specific(event, order, user, monkeypatch_on_commit):
+def test_notification_enabled_global_ignored_specific(event, order, user, django_capture_on_commit_callbacks):
     djmail.outbox = []
     user.notification_settings.create(
         method='mail', event=None, action_type='pretix.event.order.paid', enabled=True
@@ -123,24 +117,24 @@ def test_notification_enabled_global_ignored_specific(event, order, user, monkey
     user.notification_settings.create(
         method='mail', event=event, action_type='pretix.event.order.paid', enabled=False
     )
-    with transaction.atomic():
+    with django_capture_on_commit_callbacks(execute=True):
         order.log_action('pretix.event.order.paid', {})
     assert len(djmail.outbox) == 0
 
 
 @pytest.mark.django_db
-def test_notification_ignore_same_user(event, order, user, monkeypatch_on_commit):
+def test_notification_ignore_same_user(event, order, user, django_capture_on_commit_callbacks):
     djmail.outbox = []
     user.notification_settings.create(
         method='mail', event=event, action_type='pretix.event.order.paid', enabled=True
     )
-    with transaction.atomic():
+    with django_capture_on_commit_callbacks(execute=True):
         order.log_action('pretix.event.order.paid', {}, user=user)
     assert len(djmail.outbox) == 0
 
 
 @pytest.mark.django_db
-def test_notification_ignore_insufficient_permissions(event, order, user, team, monkeypatch_on_commit):
+def test_notification_ignore_insufficient_permissions(event, order, user, team, django_capture_on_commit_callbacks):
     djmail.outbox = []
     team.all_event_permissions = False
     team.limit_event_permissions = {"event.vouchers:read": True}
@@ -148,7 +142,7 @@ def test_notification_ignore_insufficient_permissions(event, order, user, team,
     user.notification_settings.create(
         method='mail', event=event, action_type='pretix.event.order.paid', enabled=True
     )
-    with transaction.atomic():
+    with django_capture_on_commit_callbacks(execute=True):
         order.log_action('pretix.event.order.paid', {})
     assert len(djmail.outbox) == 0
 

src/tests/base/test_orders.py

@@ -28,8 +28,9 @@ from zoneinfo import ZoneInfo
 import pytest
 from django.conf import settings
 from django.core import mail as djmail
+from django.db import transaction
 from django.db.models import F, Sum
-from django.test import TestCase, override_settings
+from django.test import TestCase, TransactionTestCase, override_settings
 from django.utils.timezone import make_aware, now
 from django_countries.fields import Country
 from django_scopes import scope
@@ -1225,12 +1226,6 @@ class DownloadReminderTests(TestCase):
         assert len(djmail.outbox) == 0
 
 
-@pytest.fixture
-def class_monkeypatch(request, monkeypatch):
-    request.cls.monkeypatch = monkeypatch
-
-
-@pytest.mark.usefixtures("class_monkeypatch")
 class OrderCancelTests(TestCase):
     def setUp(self):
         super().setUp()
@@ -1258,7 +1253,6 @@ class OrderCancelTests(TestCase):
             self.order.create_transactions()
             generate_invoice(self.order)
             djmail.outbox = []
-        self.monkeypatch.setattr("django.db.transaction.on_commit", lambda t: t())
 
     @classscope(attr='o')
     def test_cancel_canceled(self):
@@ -1351,14 +1345,14 @@ class OrderCancelTests(TestCase):
         self.order.status = Order.STATUS_PAID
         self.order.save()
         djmail.outbox = []
-        cancel_order(self.order.pk, send_mail=True)
-        print([s.subject for s in djmail.outbox])
-        print([s.to for s in djmail.outbox])
+        with self.captureOnCommitCallbacks(execute=True):
+            cancel_order(self.order.pk, send_mail=True)
+
         assert len(djmail.outbox) == 2
-        assert ["invoice@example.org"] == djmail.outbox[0].to
-        assert any(["Invoice_" in a[0] for a in djmail.outbox[0].attachments])
-        assert ["dummy@dummy.test"] == djmail.outbox[1].to
-        assert not any(["Invoice_" in a[0] for a in djmail.outbox[1].attachments])
+        assert ["dummy@dummy.test"] == djmail.outbox[0].to
+        assert not any(["Invoice_" in a[0] for a in djmail.outbox[0].attachments])
+        assert ["invoice@example.org"] == djmail.outbox[1].to
+        assert any(["Invoice_" in a[0] for a in djmail.outbox[1].attachments])
 
     @classscope(attr='o')
     def test_cancel_paid_with_too_high_fee(self):
@@ -1488,8 +1482,7 @@ class OrderCancelTests(TestCase):
         assert self.order.all_logentries().filter(action_type='pretix.event.order.refund.requested').exists()
 
 
-@pytest.mark.usefixtures("class_monkeypatch")
-class OrderChangeManagerTests(TestCase):
+class BaseOrderChangeManagerTestCase:
     def setUp(self):
         super().setUp()
         self.o = Organizer.objects.create(name='Dummy', slug='dummy', plugins='pretix.plugins.banktransfer')
@@ -1552,7 +1545,6 @@ class OrderChangeManagerTests(TestCase):
             self.seat_a1 = self.event.seats.create(seat_number="A1", product=self.stalls, seat_guid="A1")
             self.seat_a2 = self.event.seats.create(seat_number="A2", product=self.stalls, seat_guid="A2")
             self.seat_a3 = self.event.seats.create(seat_number="A3", product=self.stalls, seat_guid="A3")
-        self.monkeypatch.setattr("django.db.transaction.on_commit", lambda t: t())
 
     def _enable_reverse_charge(self):
         self.tr7.eu_reverse_charge = True
@@ -1566,6 +1558,8 @@ class OrderChangeManagerTests(TestCase):
             country=Country('AT')
         )
 
+
+class OrderChangeManagerTests(BaseOrderChangeManagerTestCase, TestCase):
     @classscope(attr='o')
     def test_multiple_commits_forbidden(self):
         self.ocm.change_price(self.op1, Decimal('10.00'))
@@ -2406,6 +2400,15 @@ class OrderChangeManagerTests(TestCase):
             self.ocm.commit()
         assert self.order.positions.count() == 2
 
+    @classscope(attr='o')
+    def test_add_item_quota_partial(self):
+        q1 = self.event.quotas.create(name='Test', size=1)
+        q1.items.add(self.shirt)
+        self.ocm.add_position(self.shirt, None, None, None, count=2)
+        with self.assertRaises(OrderError):
+            self.ocm.commit()
+        assert self.order.positions.count() == 2
+
     @classscope(attr='o')
     def test_add_item_addon(self):
         self.shirt.category = self.event.categories.create(name='Add-ons', is_addon=True)
@@ -3895,15 +3898,16 @@ class OrderChangeManagerTests(TestCase):
 
     @classscope(attr='o')
     def test_set_valid_until(self):
-        self.event.settings.ticket_secret_generator = "pretix_sig1"
-        assign_ticket_secret(self.event, self.op1, force_invalidate=True, save=True)
-        old_secret = self.op1.secret
+        with transaction.atomic():
+            self.event.settings.ticket_secret_generator = "pretix_sig1"
+            assign_ticket_secret(self.event, self.op1, force_invalidate=True, save=True)
+            old_secret = self.op1.secret
 
-        dt = make_aware(datetime(2022, 9, 20, 15, 0, 0, 0))
-        self.ocm.change_valid_until(self.op1, dt)
-        self.ocm.commit()
-        self.op1.refresh_from_db()
-        assert self.op1.secret != old_secret
+            dt = make_aware(datetime(2022, 9, 20, 15, 0, 0, 0))
+            self.ocm.change_valid_until(self.op1, dt)
+            self.ocm.commit()
+            self.op1.refresh_from_db()
+            assert self.op1.secret != old_secret
 
     @classscope(attr='o')
     def test_unset_valid_from_until(self):
@@ -3928,6 +3932,8 @@ class OrderChangeManagerTests(TestCase):
         assert len(djmail.outbox) == 1
         assert len(["Invoice_" in a[0] for a in djmail.outbox[0].attachments]) == 2
 
+
+class OrderChangeManagerTransactionalTests(BaseOrderChangeManagerTestCase, TransactionTestCase):
     @classscope(attr='o')
     def test_new_invoice_send_somewhere_else(self):
         generate_invoice(self.order)

src/tests/base/test_webhooks.py

@@ -25,7 +25,6 @@ from decimal import Decimal
 
 import pytest
 import responses
-from django.db import transaction
 from django.utils.timezone import now
 from django_scopes import scopes_disabled
 
@@ -82,14 +81,9 @@ def force_str(v):
     return v.decode() if isinstance(v, bytes) else str(v)
 
 
-@pytest.fixture
-def monkeypatch_on_commit(monkeypatch):
-    monkeypatch.setattr("django.db.transaction.on_commit", lambda t: t())
-
-
 @pytest.mark.django_db
 @responses.activate
-def test_webhook_trigger_event_specific(event, order, webhook, monkeypatch_on_commit):
+def test_webhook_trigger_event_specific(event, order, webhook, django_capture_on_commit_callbacks):
     responses.add_callback(
         responses.POST, 'https://google.com',
         callback=lambda r: (200, {}, 'ok'),
@@ -97,7 +91,7 @@ def test_webhook_trigger_event_specific(event, order, webhook, monkeypatch_on_co
         match_querystring=None,  # https://github.com/getsentry/responses/issues/464
     )
 
-    with transaction.atomic():
+    with django_capture_on_commit_callbacks(execute=True):
         le = order.log_action('pretix.event.order.paid', {})
     assert len(responses.calls) == 1
     assert json.loads(force_str(responses.calls[0].request.body)) == {
@@ -119,12 +113,12 @@ def test_webhook_trigger_event_specific(event, order, webhook, monkeypatch_on_co
 
 @pytest.mark.django_db
 @responses.activate
-def test_webhook_trigger_global(event, order, webhook, monkeypatch_on_commit):
+def test_webhook_trigger_global(event, order, webhook, django_capture_on_commit_callbacks):
     webhook.limit_events.clear()
     webhook.all_events = True
     webhook.save()
     responses.add(responses.POST, 'https://google.com', status=200)
-    with transaction.atomic():
+    with django_capture_on_commit_callbacks(execute=True):
         le = order.log_action('pretix.event.order.paid', {})
     assert len(responses.calls) == 1
     assert json.loads(force_str(responses.calls[0].request.body)) == {
@@ -138,13 +132,13 @@ def test_webhook_trigger_global(event, order, webhook, monkeypatch_on_commit):
 
 @pytest.mark.django_db
 @responses.activate
-def test_webhook_trigger_global_wildcard(event, order, webhook, monkeypatch_on_commit):
+def test_webhook_trigger_global_wildcard(event, order, webhook, django_capture_on_commit_callbacks):
     webhook.listeners.create(action_type="pretix.event.order.changed.*")
     webhook.limit_events.clear()
     webhook.all_events = True
     webhook.save()
     responses.add(responses.POST, 'https://google.com', status=200)
-    with transaction.atomic():
+    with django_capture_on_commit_callbacks(execute=True):
         le = order.log_action('pretix.event.order.changed.item', {})
     assert len(responses.calls) == 1
     assert json.loads(force_str(responses.calls[0].request.body)) == {
@@ -158,30 +152,30 @@ def test_webhook_trigger_global_wildcard(event, order, webhook, monkeypatch_on_c
 
 @pytest.mark.django_db
 @responses.activate
-def test_webhook_ignore_wrong_action_type(event, order, webhook, monkeypatch_on_commit):
+def test_webhook_ignore_wrong_action_type(event, order, webhook, django_capture_on_commit_callbacks):
     responses.add(responses.POST, 'https://google.com', status=200)
-    with transaction.atomic():
+    with django_capture_on_commit_callbacks(execute=True):
         order.log_action('pretix.event.order.changed.item', {})
     assert len(responses.calls) == 0
 
 
 @pytest.mark.django_db
 @responses.activate
-def test_webhook_ignore_disabled(event, order, webhook, monkeypatch_on_commit):
+def test_webhook_ignore_disabled(event, order, webhook, django_capture_on_commit_callbacks):
     webhook.enabled = False
     webhook.save()
     responses.add(responses.POST, 'https://google.com', status=200)
-    with transaction.atomic():
+    with django_capture_on_commit_callbacks(execute=True):
         order.log_action('pretix.event.order.changed.item', {})
     assert len(responses.calls) == 0
 
 
 @pytest.mark.django_db
 @responses.activate
-def test_webhook_ignore_wrong_event(event, order, webhook, monkeypatch_on_commit):
+def test_webhook_ignore_wrong_event(event, order, webhook, django_capture_on_commit_callbacks):
     webhook.limit_events.clear()
     responses.add(responses.POST, 'https://google.com', status=200)
-    with transaction.atomic():
+    with django_capture_on_commit_callbacks(execute=True):
         order.log_action('pretix.event.order.changed.item', {})
     assert len(responses.calls) == 0
 
@@ -189,10 +183,10 @@ def test_webhook_ignore_wrong_event(event, order, webhook, monkeypatch_on_commit
 @pytest.mark.django_db
 @pytest.mark.xfail(reason="retries can't be tested with celery_always_eager")
 @responses.activate
-def test_webhook_retry(event, order, webhook, monkeypatch_on_commit):
+def test_webhook_retry(event, order, webhook, django_capture_on_commit_callbacks):
     responses.add(responses.POST, 'https://google.com', status=500)
     responses.add(responses.POST, 'https://google.com', status=200)
-    with transaction.atomic():
+    with django_capture_on_commit_callbacks(execute=True):
         order.log_action('pretix.event.order.paid', {})
     assert len(responses.calls) == 2
     with scopes_disabled():
@@ -216,9 +210,9 @@ def test_webhook_retry(event, order, webhook, monkeypatch_on_commit):
 
 @pytest.mark.django_db
 @responses.activate
-def test_webhook_disable_gone(event, order, webhook, monkeypatch_on_commit):
+def test_webhook_disable_gone(event, order, webhook, django_capture_on_commit_callbacks):
     responses.add(responses.POST, 'https://google.com', status=410)
-    with transaction.atomic():
+    with django_capture_on_commit_callbacks(execute=True):
         order.log_action('pretix.event.order.paid', {})
     assert len(responses.calls) == 1
     webhook.refresh_from_db()

src/tests/conftest.py

@@ -131,3 +131,8 @@ def set_lock_namespaces(request):
             yield
     else:
         yield
+
+
+@pytest.fixture
+def class_monkeypatch(request, monkeypatch):
+    request.cls.monkeypatch = monkeypatch

src/tests/control/test_auth.py

@@ -385,11 +385,6 @@ class RegistrationFormTest(TestCase):
         self.assertEqual(response.status_code, 403)
 
 
-@pytest.fixture
-def class_monkeypatch(request, monkeypatch):
-    request.cls.monkeypatch = monkeypatch
-
-
 @pytest.mark.usefixtures("class_monkeypatch")
 class Login2FAFormTest(TestCase):
 

src/tests/control/test_events.py

@@ -49,11 +49,6 @@ from tests.base import SoupTest, extract_form_fields
 from pretix.base.models import Event, LogEntry, Order, Organizer, Team, User
 
 
-@pytest.fixture
-def class_monkeypatch(request, monkeypatch):
-    request.cls.monkeypatch = monkeypatch
-
-
 @pytest.mark.usefixtures("class_monkeypatch")
 class EventsTest(SoupTest):
     @scopes_disabled()

src/tests/control/test_orders.py

@@ -1584,10 +1584,11 @@ class OrderChangeTests(SoupTest):
             'add_position-MAX_NUM_FORMS': '100',
             'add_position-0-itemvar': str(self.shirt.pk),
             'add_position-0-do': 'on',
+            'add_position-0-count': '2',
             'add_position-0-price': '14.00',
         })
         with scopes_disabled():
-            assert self.order.positions.count() == 3
+            assert self.order.positions.count() == 4
             assert self.order.positions.last().item == self.shirt
             assert self.order.positions.last().price == 14
 

src/tests/control/test_organizer.py

@@ -33,11 +33,6 @@ from tests.base import SoupTest, extract_form_fields
 from pretix.base.models import Event, Organizer, OutgoingMail, Team, User
 
 
-@pytest.fixture
-def class_monkeypatch(request, monkeypatch):
-    request.cls.monkeypatch = monkeypatch
-
-
 @pytest.mark.usefixtures("class_monkeypatch")
 class OrganizerTest(SoupTest):
     @scopes_disabled()

src/tests/control/test_user.py

@@ -286,11 +286,6 @@ class UserPasswordChangeTest(SoupTest):
         assert self.user.needs_password_change is False
 
 
-@pytest.fixture
-def class_monkeypatch(request, monkeypatch):
-    request.cls.monkeypatch = monkeypatch
-
-
 @pytest.mark.usefixtures("class_monkeypatch")
 class UserSettings2FATest(SoupTest):
     def setUp(self):

src/tests/presale/test_checkout.py

@@ -33,7 +33,7 @@ from django.conf import settings
 from django.core import mail as djmail
 from django.core.files.uploadedfile import SimpleUploadedFile
 from django.core.signing import dumps
-from django.test import TestCase
+from django.test import TestCase, TransactionTestCase
 from django.utils.crypto import get_random_string
 from django.utils.timezone import now
 from django_countries.fields import Country
@@ -60,12 +60,6 @@ from pretix.testutils.sessions import get_cart_session_key
 from .test_timemachine import TimemachineTestMixin
 
 
-@pytest.fixture
-def class_monkeypatch(request, monkeypatch):
-    request.cls.monkeypatch = monkeypatch
-
-
-@pytest.mark.usefixtures("class_monkeypatch")
 class BaseCheckoutTestCase:
     @scopes_disabled()
     def setUp(self):
@@ -104,7 +98,6 @@ class BaseCheckoutTestCase:
         self.workshopquota.items.add(self.workshop2)
         self.workshopquota.variations.add(self.workshop2a)
         self.workshopquota.variations.add(self.workshop2b)
-        self.monkeypatch.setattr("django.db.transaction.on_commit", lambda t: t())
 
     def _set_session(self, key, value):
         session = self.client.session
@@ -4420,6 +4413,8 @@ class CheckoutTestCase(BaseCheckoutTestCase, TimemachineTestMixin, TestCase):
             assert len(djmail.outbox) == 1
             assert any(["Invoice_" in a[0] for a in djmail.outbox[0].attachments])
 
+
+class CheckoutTransactionTestCase(BaseCheckoutTestCase, TransactionTestCase):
     def test_order_confirmation_mail_invoice_sent_somewhere_else(self):
         self.event.settings.invoice_address_asked = True
         self.event.settings.invoice_address_required = True

src/tests/presale/test_event.py

@@ -36,6 +36,7 @@
 import datetime
 import re
 from decimal import Decimal
+from importlib import import_module
 from json import loads
 from zoneinfo import ZoneInfo
 
@@ -80,6 +81,34 @@ class EventMiddlewareTest(EventTestMixin, SoupTest):
         doc = self.get_doc('/%s/%s/' % (self.orga.slug, self.event.slug))
         self.assertIn(str(self.event.name), doc.find("h1").text)
 
+    def test_no_session_cookie_set_on_event_index_view(self):
+        resp = self.client.get('/%s/%s/' % (self.orga.slug, self.event.slug))
+        self.assertEqual(resp.status_code, 200)
+        assert settings.SESSION_COOKIE_NAME not in self.client.cookies
+
+    def test_no_cart_session_added_on_event_index_view(self):
+        # Make sure a session is present by doing a cart op on another event
+        event2 = Event.objects.create(
+            organizer=self.orga, name='30C3b', slug='30c3b',
+            date_from=datetime.datetime(now().year + 1, 12, 26, 14, 0, tzinfo=datetime.timezone.utc),
+            live=True,
+        )
+        self.client.post('/%s/%s/cart/add' % (self.orga.slug, event2.slug), {
+            'item_%d' % 1337: '1',  # item does not need to exist
+            'ajax': 1
+        })
+        assert settings.SESSION_COOKIE_NAME in self.client.cookies
+
+        # Visit shop, make sure no session is created
+        resp = self.client.get('/%s/%s/' % (self.orga.slug, self.event.slug))
+        self.assertEqual(resp.status_code, 200)
+
+        SessionStore = import_module(settings.SESSION_ENGINE).SessionStore
+        session = SessionStore(self.client.cookies[settings.SESSION_COOKIE_NAME].value).load()
+        assert set(session.keys()) == {
+            f"current_cart_event_{event2.pk}", "carts"
+        }
+
     def test_not_found(self):
         resp = self.client.get('/%s/%s/' % ('foo', 'bar'))
         self.assertEqual(resp.status_code, 404)