base cart_quantity filed and filter pagination and sort for order

backend/product/serializers.py

@@ -2,7 +2,7 @@ from .models import *
 from rest_framework import serializers
 from django.utils import timezone
 from datetime import  timedelta
-
+from django.contrib.auth.models import AnonymousUser 
 
 
 
@@ -49,6 +49,7 @@ class ProductVariantSerialzier(serializers.ModelSerializer):
     in_pack_items = InPackItemsSerialzier(many=True)
     images = ProductImageSerailizer(many=True)
     details = ProductDetailSerializer(many=True, read_only=True)
+    cart_quantity = serializers.SerializerMethodField()
     class Meta:
         model = ProductVariant
         exclude = ('min_price', 'sell', 'currency', 'product', 'input_price')
@@ -60,6 +61,11 @@ class ProductVariantSerialzier(serializers.ModelSerializer):
         if view_type == 'list':
             self.fields.pop('in_pack_items', None)
 
+    def get_cart_quantity(self, obj):
+        request = self.context.get('request')
+        if not request or not request.user.is_authenticated:
+            return 0
+        return 1
 
 
 
@@ -135,7 +141,7 @@ class DynamicProductSerializer(serializers.ModelSerializer):
             many=True,
             context={
                 'view_type': 'list',
-                'dollor_price': self.context.get('dollor_price')
+                'request': self.context.get('request')
             }
         )
         return serializer.data