Added support for SimpleLazyObject. Fixed #22

graphene_django/tests/test_query.py

@@ -2,6 +2,7 @@ import datetime
 
 import pytest
 from django.db import models
+from django.utils.functional import SimpleLazyObject
 from py.test import raises
 
 import graphene
@@ -33,6 +34,37 @@ def test_should_query_only_fields():
         assert not result.errors
 
 
+def test_should_query_simplelazy_objects():
+    class ReporterType(DjangoObjectType):
+
+        class Meta:
+            model = Reporter
+            only_fields = ('id', )
+
+
+    class Query(graphene.ObjectType):
+        reporter = graphene.Field(ReporterType)
+
+        def resolve_reporter(self, args, context, info):
+            return SimpleLazyObject(lambda: Reporter(id=1))
+
+    schema = graphene.Schema(query=Query)
+    query = '''
+        query {
+          reporter {
+            id
+          }
+        }
+    '''
+    result = schema.execute(query)
+    assert not result.errors
+    assert result.data == {
+        'reporter': {
+            'id': '1'
+        }
+    }
+
+
 def test_should_query_well():
     class ReporterType(DjangoObjectType):
 

graphene_django/types.py

@@ -2,6 +2,7 @@ from collections import OrderedDict
 
 import six
 
+from django.utils.functional import SimpleLazyObject
 from graphene import Field, ObjectType
 from graphene.types.objecttype import ObjectTypeMeta
 from graphene.types.options import Options
@@ -103,6 +104,9 @@ class DjangoObjectType(six.with_metaclass(DjangoObjectTypeMeta, ObjectType)):
 
     @classmethod
     def is_type_of(cls, root, context, info):
+        if isinstance(root, SimpleLazyObject):
+            root._setup()
+            root = root._wrapped
         if isinstance(root, cls):
             return True
         if not is_valid_django_model(type(root)):