add error handling for product crearte

core/apps/products/serializers/product.py

@@ -30,6 +30,8 @@ class ProductSerializer(serializers.Serializer):
     sub_folder_id = serializers.UUIDField(required=False)
 
     def validate(self, data):
+        if Product.objects.filter(name=data['name']).exists():
+            raise serializers.ValidationError("Product with this name already exists")
         folder = Folder.objects.filter(id=data.get('folder_id')).first()
         unity = Unity.objects.filter(id=data.get('unity_id')).first()
         if not folder: