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Refs #145 -- Multi-use vouchers

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This commit is contained in:
Raphael Michel
2016-11-27 00:02:28 +01:00
parent 6c2ecd153c
commit db6fb51fc6
18 changed files with 470 additions and 104 deletions
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22
src/pretix/base/services/cart.py
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@@ -33,7 +33,8 @@ error_messages = {
'ended': _('The presale period has ended.'),
'price_too_high': _('The entered price is to high.'),
'voucher_invalid': _('This voucher code is not known in our database.'),
'voucher_redeemed': _('This voucher code has already been used and can only be used once.'),
'voucher_redeemed': _('This voucher code has already been used the maximum number of times allowed.'),
'voucher_redeemed_partial': _('This voucher code can only be redeemed %d more times.'),
'voucher_double': _('You already used this voucher code. Remove the associated line from your '
'cart if you want to use it for a different product.'),
'voucher_expired': _('This voucher is expired.'),
@@ -114,17 +115,26 @@ def _add_new_items(event: Event, items: List[dict],
if i.get('voucher'):
try:
voucher = Voucher.objects.get(code=i.get('voucher').strip(), event=event)
if voucher.redeemed:
if voucher.redeemed >= voucher.max_usages:
return error_messages['voucher_redeemed']
if voucher.valid_until is not None and voucher.valid_until < now_dt:
return error_messages['voucher_expired']
if not voucher.applies_to(item, variation):
return error_messages['voucher_invalid_item']
doubleuse = CartPosition.objects.filter(voucher=voucher, cart_id=cart_id, event=event)
redeemed_in_carts = CartPosition.objects.filter(
Q(voucher=voucher) & Q(event=event) &
(Q(expires__gte=now_dt) | Q(cart_id=cart_id))
)
if 'cp' in i:
doubleuse = doubleuse.exclude(pk=i['cp'].pk)
if doubleuse.exists():
return error_messages['voucher_double']
redeemed_in_carts = redeemed_in_carts.exclude(pk=i['cp'].pk)
v_avail = voucher.max_usages - voucher.redeemed - redeemed_in_carts.count()
if v_avail < 1:
return error_messages['voucher_redeemed']
if i['count'] > v_avail:
return error_messages['voucher_redeemed_partial'] % v_avail
except Voucher.DoesNotExist:
return error_messages['voucher_invalid']