feat: lots of changes

shop/utils.py

@@ -5,20 +5,19 @@ from shop.models import OrderLine, Tax, Product, Order, Customer
 from django.db.models import QuerySet
 
 
-def create_order_line_for_product(
-    product: Product, quantity: Decimal, tax: Tax, order: Order
-):
-    price = product.prices.last().price
-    base_total = round(price * quantity, 2)
-    taxes = round(base_total * (tax.value / Decimal("100")), 2)
+def create_order_line_for_product(product: Product, quantity: Decimal, order: Order):
+    price = product.prices.last()
+    base_total = round(price.price * quantity, 2)
+    tax_value = price.tax.value / Decimal("100")
+    taxes = round(base_total * tax_value, 2)
 
     return OrderLine.objects.create(
         order=order,
         product=product,
         quantity=quantity,
-        price=price,
+        price=price.price,
         base_total=base_total,
-        tax_value=tax.value,
+        tax_value=tax_value,
         taxes=taxes,
         total=base_total + taxes,
     )