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Time machine mode [Z#23129725] (#3961)

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Allows organizers to test their shop as if it were a different date and time.

Implemented using a time_machine_now() function which is used instead of regular now(), which can overlay the real date time with a value from a ContextVar, assigned from a session value in EventMiddleware.

For more information, see doc/development/implementation/timemachine.rst

---------

Co-authored-by: Richard Schreiber <schreiber@rami.io>
Co-authored-by: Raphael Michel <michel@rami.io>
This commit is contained in:
Mira
2024-05-17 10:52:17 +02:00
committed by GitHub
parent bfcca7046a
commit b638c00952
38 changed files with 789 additions and 142 deletions
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29
src/pretix/base/models/items.py
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@@ -55,7 +55,7 @@ from django.db.models import Q
from django.utils import formats
from django.utils.crypto import get_random_string
from django.utils.functional import cached_property
from django.utils.timezone import is_naive, make_aware, now
from django.utils.timezone import is_naive, make_aware
from django.utils.translation import gettext_lazy as _, pgettext_lazy
from django_countries.fields import Country
from django_scopes import ScopedManager
@@ -65,6 +65,7 @@ from pretix.base.models import fields
from pretix.base.models.base import LoggedModel
from pretix.base.models.fields import MultiStringField
from pretix.base.models.tax import TaxedPrice
from pretix.base.timemachine import time_machine_now
from ...helpers.images import ImageSizeValidator
from ..media import MEDIA_TYPES
@@ -192,7 +193,7 @@ class SubEventItem(models.Model):
self.subevent.event.cache.clear()
def is_available(self, now_dt: datetime=None) -> bool:
now_dt = now_dt or now()
now_dt = now_dt or time_machine_now()
if self.disabled:
return False
if self.available_from and self.available_from > now_dt:
@@ -248,7 +249,7 @@ class SubEventItemVariation(models.Model):
self.subevent.event.cache.clear()
def is_available(self, now_dt: datetime=None) -> bool:
now_dt = now_dt or now()
now_dt = now_dt or time_machine_now()
if self.disabled:
return False
if self.available_from and self.available_from > now_dt:
@@ -263,8 +264,8 @@ def filter_available(qs, channel='web', voucher=None, allow_addons=False):
# IMPORTANT: If this is updated, also update the ItemVariation query
# in models/event.py: EventMixin.annotated()
Q(active=True)
& Q(Q(available_from__isnull=True) | Q(available_from__lte=now()) | Q(available_from_mode='info'))
& Q(Q(available_until__isnull=True) | Q(available_until__gte=now()) | Q(available_until_mode='info'))
& Q(Q(available_from__isnull=True) | Q(available_from__lte=time_machine_now()) | Q(available_from_mode='info'))
& Q(Q(available_until__isnull=True) | Q(available_until__gte=time_machine_now()) | Q(available_until_mode='info'))
& Q(sales_channels__contains=channel) & Q(require_bundling=False)
)
if not allow_addons:
@@ -782,7 +783,7 @@ class Item(LoggedModel):
return t
def is_available_by_time(self, now_dt: datetime=None) -> bool:
now_dt = now_dt or now()
now_dt = now_dt or time_machine_now()
if self.available_from and self.available_from > now_dt:
return False
if self.available_until and self.available_until < now_dt:
@@ -794,13 +795,13 @@ class Item(LoggedModel):
Returns whether this item is available according to its ``active`` flag
and its ``available_from`` and ``available_until`` fields
"""
now_dt = now_dt or now()
now_dt = now_dt or time_machine_now()
if not self.active or not self.is_available_by_time(now_dt):
return False
return True
def unavailability_reason(self, now_dt: datetime=None, has_voucher=False, subevent=None) -> Optional[str]:
now_dt = now_dt or now()
now_dt = now_dt or time_machine_now()
subevent_item = subevent and subevent.item_overrides.get(self.pk)
if not self.active:
return 'active'
@@ -957,11 +958,11 @@ class Item(LoggedModel):
return self.validity_fixed_from, self.validity_fixed_until
elif self.validity_mode == Item.VALIDITY_MODE_DYNAMIC:
tz = override_tz or self.event.timezone
requested_start = requested_start or now()
requested_start = requested_start or time_machine_now()
if enforce_start_limit and not self.validity_dynamic_start_choice:
requested_start = now()
requested_start = time_machine_now()
if enforce_start_limit and self.validity_dynamic_start_choice_day_limit is not None:
requested_start = min(requested_start, now() + timedelta(days=self.validity_dynamic_start_choice_day_limit))
requested_start = min(requested_start, time_machine_now() + timedelta(days=self.validity_dynamic_start_choice_day_limit))
valid_until = requested_start.astimezone(tz)
@@ -1290,7 +1291,7 @@ class ItemVariation(models.Model):
return ItemVariation.objects.filter(item=self.item).count() == 1
def is_available_by_time(self, now_dt: datetime=None) -> bool:
now_dt = now_dt or now()
now_dt = now_dt or time_machine_now()
if self.available_from and self.available_from > now_dt:
return False
if self.available_until and self.available_until < now_dt:
@@ -1302,13 +1303,13 @@ class ItemVariation(models.Model):
Returns whether this item is available according to its ``active`` flag
and its ``available_from`` and ``available_until`` fields
"""
now_dt = now_dt or now()
now_dt = now_dt or time_machine_now()
if not self.active or not self.is_available_by_time(now_dt):
return False
return True
def unavailability_reason(self, now_dt: datetime=None, has_voucher=False, subevent=None) -> Optional[str]:
now_dt = now_dt or now()
now_dt = now_dt or time_machine_now()
subevent_var = subevent and subevent.var_overrides.get(self.pk)
if not self.active:
return 'active'