add user rating logic to dynamic product serializer for its instace view type

backend/product/serializers.py

@@ -159,7 +159,7 @@ class DynamicProductSerializer(serializers.ModelSerializer):
     customer_pickup_title = serializers.SerializerMethodField()
     customer_pickup_description = serializers.SerializerMethodField()
     average_rating = serializers.SerializerMethodField()
-    
+    user_rating = serializers.SerializerMethodField()
     def __init__(self, *args, **kwargs):
         super().__init__(*args, **kwargs)
         view_type = self.context.get('view_type', 'all')
@@ -177,10 +177,21 @@ class DynamicProductSerializer(serializers.ModelSerializer):
         view_type = {
             'list': ['id', 'name', 'rating', 'slug', 'category',  'colors', 'image', 'best_deal_price_before_discount', 'best_deal_price_after_discount', 'best_deal_discount', 'main_image', 'average_rating'],
             'slider': ['id', 'name', 'rating', 'slug', 'category', 'variants', 'colors', 'image', 'best_deal_price_before_discount', 'best_deal_price_after_discount', 'best_deal_discount', 'average_rating'],
-            'instance': ['id', 'name', 'description', 'rating',  'slug', 'meta_description', 'meta_keywords', 'meta_rating', 'category', 'related_products', 'in_pack_items', 'variants', 'colors', 'added_to_favorites', 'image', 'customer_pickup_title', 'customer_pickup_description', 'average_rating'],
+            'instance': ['id', 'name', 'description', 'rating',  'slug', 'meta_description', 'meta_keywords', 'meta_rating', 'category', 'related_products', 'in_pack_items', 'variants', 'colors', 'added_to_favorites', 'image', 'customer_pickup_title', 'customer_pickup_description', 'average_rating', 'user_rating'],
             'chat': ['id', 'name', 'description', 'variants', 'image']
         }
 
+
+    def get_user_rating(self, obj):
+        request = self.context.get('request')
+        if not request.user.is_authenticated:
+            return None 
+        product_ratings = obj.ratings.all()
+        if product_ratings.filter(user=request.user).exists():
+            return product_ratings.filter(user=request.user).first().rating
+        else:
+            return None
+
     def _get_best_deal_variant(self, obj):
         """Get best deal variant from prefetched variants (pre-ordered by discount/price)"""
         if not hasattr(self, '_best_deal_cache'):