Features: 1) Add validation for empty attributes in Order model; 2) Introduce final_amount retrieval for streamlined promocode application.

Fixes: 1) Update `logger.debug` call to improve readability; 2) Correct `promocode` key to `promocode_uuid` in order attributes dictionary to ensure consistent naming.

Extra: 1) Minor cleanup and code comments in `Order` processing logic.

core/models.py

@@ -1282,11 +1282,11 @@ class PromoCode(ExportModelOperationsMixin("promocode"), NiceModel):  # type: ig
 
         if self.discount_type == "percent":
             promo_amount -= round(promo_amount * (float(self.discount_percent) / 100), 2)  # type: ignore [arg-type]
-            order.attributes.update({"promocode": str(self.uuid), "final_price": promo_amount})
+            order.attributes.update({"promocode_uuid": str(self.uuid), "final_price": promo_amount})
             order.save()
         elif self.discount_type == "amount":
             promo_amount -= round(float(self.discount_amount), 2)  # type: ignore [arg-type]
-            order.attributes.update({"promocode": str(self.uuid), "final_price": promo_amount})
+            order.attributes.update({"promocode_uuid": str(self.uuid), "final_price": promo_amount})
             order.save()
         else:
             raise ValueError(_(f"invalid discount type for promocode {self.uuid}"))
@@ -1572,6 +1572,10 @@ class Order(ExportModelOperationsMixin("order"), NiceModel):  # type: ignore [mi
         chosen_products: list | None = None,
     ) -> Self | Transaction | None:
         order = self
+
+        if not self.attributes:
+            self.attributes = {}
+
         if chosen_products:
             order = Order.objects.create(status="MOMENTAL", user=self.user)
             order.bulk_add_products(chosen_products)
@@ -1595,7 +1599,13 @@ class Order(ExportModelOperationsMixin("order"), NiceModel):  # type: ignore [mi
         if force_payment:
             force = "payment"
 
-        amount = order.apply_promocode(promocode_uuid) if promocode_uuid else order.total_price
+        amount = self.attributes.get("final_amount") or order.total_price
+
+        if self.attributes.get("promocode_uuid") and not self.attributes.get("final_amount"):
+            amount = order.apply_promocode(self.attributes.get("promocode_uuid"))
+
+        if promocode_uuid and not self.attributes.get("final_amount"):
+            amount = order.apply_promocode(promocode_uuid)
 
         if not order.user:
             raise ValueError(_("you cannot buy an order without a user"))

payments/views.py

@@ -68,7 +68,7 @@ class CallbackAPIView(APIView):
     """
 
     def post(self, request, *args, **kwargs):
-        logger.debug(request.__dict__)
+        logger.debug(f"{request.__dict__}\n")
         try:
             gateway = kwargs.get("gateway", "")
             # noinspection PyUnreachableCode