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templatetags: Don't let the donation amount go negative.

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To account for ticket vouchers.
This commit is contained in:
Brett Smith 2019-12-16 15:16:00 -05:00
parent 3f6e5ac3d1
commit 3651d7a7fb
1 changed files with 1 additions and 1 deletions
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2
pinaxcon/templatetags/nbpy_tags.py
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@ -38,7 +38,7 @@ def donation_income(context, invoice):
cheapest_ticket = tickets.order_by('price').first()
ticket_rbi = nonvat_price(cheapest_ticket)
return sum(
(nonvat_price(ticket) - ticket_rbi
(max(nonvat_price(ticket) - ticket_rbi, 0)
for ticket in invoice.lineitem_set.filter(product__in=tickets)),
Decimal(0)).quantize(CENTS_QUANT)