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Add a maximum budget to vouchers (#1526)

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* Data model changes

* Fix test failures

* Adjustments

* Some tests and API support

* Check when extending orders

* Make things more deterministic, fix style

* Do not apply negative discounts

* Update price_before_voucher on item/subevent changes

* Add tests for price_before_voucher in combination with free price

* Fix InvoiceAddress.DoesNotExist
This commit is contained in:
Raphael Michel
2020-01-03 16:15:17 +01:00
committed by GitHub
parent b738e3bd9d
commit 8e2821b398
20 changed files with 649 additions and 23 deletions
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17
src/pretix/base/models/orders.py
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@@ -687,10 +687,12 @@ class Order(LockModel, LoggedModel):
error_messages = {
'unavailable': _('The ordered product "{item}" is no longer available.'),
'seat_unavailable': _('The seat "{seat}" is no longer available.'),
'voucher_budget': _('The voucher "{voucher}" no longer has sufficient budget.'),
}
now_dt = now_dt or now()
positions = self.positions.all().select_related('item', 'variation', 'seat')
positions = self.positions.all().select_related('item', 'variation', 'seat', 'voucher')
quota_cache = {}
v_budget = {}
try:
for i, op in enumerate(positions):
if op.seat:
@@ -699,6 +701,16 @@ class Order(LockModel, LoggedModel):
if force:
continue
if op.voucher and op.voucher.budget is not None and op.price_before_voucher is not None:
if op.voucher not in v_budget:
v_budget[op.voucher] = op.voucher.budget - op.voucher.budget_used()
disc = op.price_before_voucher - op.price
if disc > v_budget[op.voucher]:
raise Quota.QuotaExceededException(error_messages['voucher_budget'].format(
voucher=op.voucher.code
))
v_budget[op.voucher] -= disc
quotas = list(op.quotas)
if len(quotas) == 0:
raise Quota.QuotaExceededException(error_messages['unavailable'].format(
@@ -991,6 +1003,9 @@ class AbstractPosition(models.Model):
verbose_name=_("Variation"),
on_delete=models.PROTECT
)
price_before_voucher = models.DecimalField(
decimal_places=2, max_digits=10, null=True,
)
price = models.DecimalField(
decimal_places=2, max_digits=10,
verbose_name=_("Price")