Adding test to reproduce bug whereby the FilterConnectionResolver does not correctly traverse relationships

graphene/contrib/django/filter/tests/test_fields.py

@@ -1,4 +1,7 @@
+from datetime import datetime
+
 import pytest
+from graphql.core.execution.base import ResolveInfo, ExecutionContext
 
 from graphene import ObjectType, Schema
 from graphene.contrib.django import DjangoNode
@@ -7,6 +10,7 @@ from graphene.contrib.django.forms import (GlobalIDFormField,
 from graphene.contrib.django.tests.models import Article, Pet, Reporter
 from graphene.contrib.django.utils import DJANGO_FILTER_INSTALLED
 from graphene.relay import NodeField
+from graphene.utils import ProxySnakeDict
 
 pytestmark = []
 if DJANGO_FILTER_INSTALLED:
@@ -160,6 +164,57 @@ def test_filter_filterset_information_on_meta_related():
     assert_orderable(articles_field)
 
 
+def test_filter_filterset_related_results():
+    class ReporterFilterNode(DjangoNode):
+
+        class Meta:
+            model = Reporter
+            filter_fields = ['first_name', 'articles']
+            filter_order_by = True
+
+    class ArticleFilterNode(DjangoNode):
+
+        class Meta:
+            model = Article
+            filter_fields = ['headline', 'reporter']
+            filter_order_by = True
+
+    class Query(ObjectType):
+        all_reporters = DjangoFilterConnectionField(ReporterFilterNode)
+        all_articles = DjangoFilterConnectionField(ArticleFilterNode)
+        reporter = NodeField(ReporterFilterNode)
+        article = NodeField(ArticleFilterNode)
+
+    r1 = Reporter.objects.create(first_name='r1', last_name='r1', email='r1@test.com')
+    r2 = Reporter.objects.create(first_name='r2', last_name='r2', email='r2@test.com')
+    a1 = Article.objects.create(headline='a1', pub_date=datetime.now(), reporter=r1)
+    a2 = Article.objects.create(headline='a2', pub_date=datetime.now(), reporter=r2)
+
+    query = '''
+    query {
+        allReporters {
+            edges {
+                node {
+                    articles {
+                        edges {
+                            node {
+                                headline
+                            }
+                        }
+                    }
+                }
+            }
+        }
+    }
+    '''
+    schema = Schema(query=Query)
+    result = schema.execute(query)
+    assert not result.errors
+    # We should only get back a single article for each reporter
+    assert len(result.data['allReporters']['edges'][0]['node']['articles']['edges']) == 1
+    assert len(result.data['allReporters']['edges'][1]['node']['articles']['edges']) == 1
+
+
 def test_global_id_field_implicit():
     field = DjangoFilterConnectionField(ArticleNode, fields=['id'])
     filterset_class = field.resolver_fn.get_filterset_class()