update order item serilizer

backend/order/serializers.py

@@ -46,6 +46,10 @@ class DiscountCodeSerializer(serializers.ModelSerializer):
 
 class OrderItemSerailzier(serializers.ModelSerializer):
     product = serializers.SerializerMethodField()
+    discount_amount = serializers.SerializerMethodField()
+    price = serializers.SerializerMethodField()
+    final_price = serializers.SerializerMethodField()
+    discount = serializers.SerializerMethodField()
     class Meta:
         model = OrderItemModel
         exclude = ('order',)
@@ -53,6 +57,19 @@ class OrderItemSerailzier(serializers.ModelSerializer):
     def get_product(self, obj):
         return ProductVariantSerialzier(instance=obj.product, context={'request': self.context.get('request')}).data
 
+    def get_discount_amount(self, obj):
+        discount_amount  = int(obj.price * (obj.product.discount / 100))
+        return f'{():,.0f} تومان'
+
+    def get_final_price(self, obj):
+        final_price = obj.price - int(obj.price * (obj.product.discount / 100))
+        return f'{():,.0f} تومان'
+
+    def get_price(self, obj):
+        return f'{(obj.price * obj.quantity):,.0f} تومان'
+
+    def get_discount(self, obj):
+        return obj.product.discount