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API: Writeable methods for vouchers (#639)

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This commit is contained in:
Raphael Michel
2017-10-12 14:09:44 +02:00
committed by GitHub
parent de086a2b07
commit be6496e569
11 changed files with 1029 additions and 109 deletions
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129
src/pretix/base/models/vouchers.py
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@@ -4,6 +4,7 @@ from django.conf import settings
from django.core.exceptions import ValidationError
from django.core.validators import MinLengthValidator
from django.db import models
from django.db.models import Q
from django.utils.crypto import get_random_string
from django.utils.timezone import now
from django.utils.translation import pgettext_lazy, ugettext_lazy as _
@@ -180,24 +181,136 @@ class Voucher(LoggedModel):
def __str__(self):
return self.code
def allow_delete(self):
return self.redeemed == 0
def clean(self):
super().clean()
if self.quota:
if self.item:
Voucher.clean_item_properties(
{
'block_quota': self.block_quota,
},
self.event,
self.quota,
self.item,
self.variation
)
@staticmethod
def clean_item_properties(data, event, quota, item, variation):
if quota:
if item:
raise ValidationError(_('You cannot select a quota and a specific product at the same time.'))
elif self.item:
if self.variation and (not self.item or not self.item.has_variations):
elif item:
if variation and (not item or not item.has_variations):
raise ValidationError(_('You cannot select a variation without having selected a product that provides '
'variations.'))
if self.variation and not self.item.variations.filter(pk=self.variation.pk).exists():
if variation and not item.variations.filter(pk=variation.pk).exists():
raise ValidationError(_('This variation does not belong to this product.'))
if self.item.has_variations and not self.variation and self.block_quota:
if item.has_variations and not variation and data.get('block_quota'):
raise ValidationError(_('You can only block quota if you specify a specific product variation. '
'Otherwise it might be unclear which quotas to block.'))
if item.category and item.category.is_addon:
raise ValidationError(_('It is currently not possible to create vouchers for add-on products.'))
else:
raise ValidationError(_('You need to specify either a quota or a product.'))
if self.event.has_subevents and self.block_quota and not self.subevent:
@staticmethod
def clean_max_usages(data, redeemed):
if data.get('max_usages', 1) < redeemed:
raise ValidationError(
_('This voucher has already been redeemed %(redeemed)s times. You cannot reduce the maximum number of '
'usages below this number.'),
params={
'redeemed': redeemed
}
)
@staticmethod
def clean_subevent(data, event):
if event.has_subevents and data.get('block_quota') and not data.get('subevent'):
raise ValidationError(_('If you want this voucher to block quota, you need to select a specific date.'))
elif data.get('subevent') and not event.has_subevents:
raise ValidationError(_('You can not select a subevent if your event is not an event series.'))
@staticmethod
def clean_quota_needs_checking(data, old_instance, item_changed, creating):
# We only need to check for quota on vouchers that are now blocking quota and haven't
# before (or have blocked a different quota before)
if data.get('block_quota', False):
is_valid = data.get('valid_until') is None or data.get('valid_until') >= now()
if not is_valid:
# If the voucher is not valid, it won't block any quota
return False
if creating:
# This is a new voucher
return True
if not old_instance.block_quota:
# Change from nonblocking to blocking
return True
if old_instance.valid_until is not None and old_instance.valid_until < now():
# This voucher has been expired and is now valid again and therefore blocks quota again
return True
if item_changed:
# The voucher has been reassigned to a different item, variation or quota
return True
if data.get('subevent') != old_instance.subevent:
# The voucher has been reassigned to a different subevent
return True
return False
@staticmethod
def clean_quota_get_ignored(old_instance):
quotas = set()
was_valid = old_instance and (
old_instance.valid_until is None or old_instance.valid_until >= now()
)
if old_instance and old_instance.block_quota and was_valid:
if old_instance.quota:
quotas.add(old_instance.quota)
elif old_instance.variation:
quotas |= set(old_instance.variation.quotas.filter(
subevent=old_instance.subevent))
elif old_instance.item:
quotas |= set(old_instance.item.quotas.filter(
subevent=old_instance.subevent))
return quotas
@staticmethod
def clean_quota_check(data, cnt, old_instance, event, quota, item, variation):
old_quotas = Voucher.clean_quota_get_ignored(old_instance)
if event.has_subevents and data.get('block_quota') and not data.get('subevent'):
raise ValidationError(_('If you want this voucher to block quota, you need to select a specific date.'))
if quota:
if quota in old_quotas:
return
else:
avail = quota.availability(count_waitinglist=False)
elif item and item.has_variations and not variation:
raise ValidationError(_('You can only block quota if you specify a specific product variation. '
'Otherwise it might be unclear which quotas to block.'))
elif item and variation:
avail = variation.check_quotas(ignored_quotas=old_quotas, subevent=data.get('subevent'))
elif item and not item.has_variations:
avail = item.check_quotas(ignored_quotas=old_quotas, subevent=data.get('subevent'))
else:
raise ValidationError(_('You need to specify either a quota or a product.'))
if avail[0] != Quota.AVAILABILITY_OK or (avail[1] is not None and avail[1] < cnt):
raise ValidationError(_('You cannot create a voucher that blocks quota as the selected product or '
'quota is currently sold out or completely reserved.'))
@staticmethod
def clean_voucher_code(data, event, pk):
if 'code' in data and Voucher.objects.filter(Q(code=data['code']) & Q(event=event) & ~Q(pk=pk)).exists():
raise ValidationError(_('A voucher with this code already exists.'))
def save(self, *args, **kwargs):
self.code = self.code.upper()