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refactor create_shop_orders_on_payment to calculate tax after discounts and remove unused tax allocation

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Parsa Nazer
2026-01-06 11:25:44 +03:30
parent 4badbf4fbf
commit 92dcd3e793
1 changed files with 10 additions and 2 deletions
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backend/order/signals.py
+10 -2
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@@ -112,9 +112,17 @@ def create_shop_orders_on_payment(sender, instance: OrderModel, created, **kwarg
for it in items_list: for it in items_list:
item_special_discounts += Decimal(str(it.special_discount_amount or 0)) item_special_discounts += Decimal(str(it.special_discount_amount or 0))
# Proportionally allocate cart-level discount and tax # Proportionally allocate cart-level discount
allocated_discount = (Decimal(str(order_discount)) * Decimal(str(shop_subtotal)) / Decimal(str(total_subtotal))) if order_discount else Decimal('0') allocated_discount = (Decimal(str(order_discount)) * Decimal(str(shop_subtotal)) / Decimal(str(total_subtotal))) if order_discount else Decimal('0')
allocated_tax = (Decimal(str(order_tax)) * Decimal(str(shop_subtotal)) / Decimal(str(total_subtotal))) if order_tax else Decimal('0')
# Calculate tax on shop's amount after all discounts
# Tax rate from settings (default 10%)
tax_rate = Decimal(str(getattr(settings, 'DEFAULT_TAX_RATE', 10)))
base_for_tax = max(
Decimal('0'),
Decimal(str(shop_subtotal)) - item_level_discounts - item_special_discounts - allocated_discount
)
allocated_tax = base_for_tax * (tax_rate / Decimal('100'))
commission_percent = getattr(shop, 'commission_percent', 0) or 0 commission_percent = getattr(shop, 'commission_percent', 0) or 0
try: try: