Use maybe_queryset in DjangoFilterConnectionField

graphene_django/filter/fields.py

@@ -2,7 +2,9 @@
 from functools import partial
 
 from graphene.types.argument import to_arguments
+
 from ..fields import DjangoConnectionField
+from ..utils import maybe_queryset
 from .utils import get_filtering_args_from_filterset, get_filterset_class
 
 
@@ -72,7 +74,7 @@ def connection_resolver(cls, resolver, connection, default_manager, max_limit,
         filter_kwargs = {k: v for k, v in args.items() if k in filtering_args}
         qs = filterset_class(
             data=filter_kwargs,
-            queryset=default_manager.get_queryset()
+            queryset=maybe_queryset(default_manager)
         ).qs
 
         return super(DjangoFilterConnectionField, cls).connection_resolver(

graphene_django/rest_framework/mutation.py

@@ -1,16 +1,12 @@
 from collections import OrderedDict
 
 import graphene
+from graphene.relay.mutation import ClientIDMutation
 from graphene.types import Field, InputField
 from graphene.types.mutation import MutationOptions
-from graphene.relay.mutation import ClientIDMutation
-from graphene.types.objecttype import (
-    yank_fields_from_attrs
-)
+from graphene.types.objecttype import yank_fields_from_attrs
 
-from .serializer_converter import (
-    convert_serializer_field
-)
+from .serializer_converter import convert_serializer_field
 from .types import ErrorType
 
 
@@ -69,7 +65,8 @@ def __init_subclass_with_meta__(cls, serializer_class=None,
 
     @classmethod
     def mutate_and_get_payload(cls, root, info, **input):
-        serializer = cls._meta.serializer_class(data=input)
+        existing = cls.load_existing(cls._meta.serializer_class, input)
+        serializer = cls._meta.serializer_class(existing, data=input)
 
         if serializer.is_valid():
             return cls.perform_mutate(serializer, info)
@@ -81,7 +78,15 @@ def mutate_and_get_payload(cls, root, info, **input):
 
             return cls(errors=errors)
 
+    @classmethod
+    def load_existing(cls, serializer_class, data):
+        id = data.get('id')
+        if id is not None:
+            model_class = serializer_class.Meta.model
+            return model_class.objects.get(id=data['id'])
+        return None
+
     @classmethod
     def perform_mutate(cls, serializer, info):
-        obj = serializer.save()
-        return cls(errors=None, **obj)
+        serializer.save()
+        return cls(errors=None, **serializer.data)