fix

core/apps/orders/views/order.py

@@ -25,7 +25,7 @@ class OrderListApiView(generics.ListAPIView):
         'product__name', 'unity__value', 'project_folder__name', 'project__name',
         'wherehouse__name', 'date', 'quantity', 'employee__full_name', 'employee__phone_number'
     ]
-    filterset_class = [OrderFilter]
+    filterset_class = OrderFilter
 
 
 class OrderCreateApiView(generics.CreateAPIView):

core/apps/products/serializers/folder.py

@@ -31,7 +31,7 @@ class SubFolderSerializer(serializers.ModelSerializer):
 
     class Meta:
         model = SubFolder
-        fields = ['id', 'name', 'folder']
+        fields = ['id', 'name', 'folder', 'product_count']
         extra_kwargs = {
             'id': {'read_only': True},
             "folder": {"write_only": True},