Adds test for nested node filtering.

graphene_django/tests/test_query.py

@@ -281,3 +281,87 @@ def resolve_all_reporters(self, args, context, info):
             }]
         }
     }
+
+def test_should_query_node_filtering():
+    class ReporterType(DjangoObjectType):
+
+        class Meta:
+            model = Reporter
+            interfaces = (Node, )
+
+    class ArticleType(DjangoObjectType):
+
+        class Meta:
+            model = Article
+            interfaces = (Node, )
+            filter_fields = ('lang', )
+
+    class Query(graphene.ObjectType):
+        all_reporters = DjangoConnectionField(ReporterType)
+
+    r = Reporter.objects.create(
+        first_name='John',
+        last_name='Doe',
+        email='johndoe@example.com',
+        a_choice=1
+    )
+    Article.objects.create(
+        headline='Article Node 1',
+        pub_date=datetime.date.today(),
+        reporter=r,
+        editor=r,
+        lang='es'
+    )
+    Article.objects.create(
+        headline='Article Node 2',
+        pub_date=datetime.date.today(),
+        reporter=r,
+        editor=r,
+        lang='en'
+    )
+
+
+    schema = graphene.Schema(query=Query)
+    query = '''
+        query NodeFilteringQuery {
+            allReporters {
+                edges {
+                    node {
+                        id
+                        articles(lang: "es") {
+                            edges {
+                                node {
+                                    id
+                                }
+                            }
+                        }
+                    }
+                }
+            }
+        }
+    '''
+
+    expected = {
+		"allReporters": {
+			"edges": [
+				{
+					"node": {
+						"id": "UmVwb3J0ZXJUeXBlOjE=", 
+						"articles": {
+							"edges": [
+								{
+									"node": {
+										"id": "QXJ0aWNsZVR5cGU6MQ=="
+									}
+								}
+							]
+						}
+					}
+				}
+			]
+		}
+	}
+
+    result = schema.execute(query)
+    assert not result.errors
+    assert result.data == expected