diff --git a/graphene-django/graphene_django/debug/middleware.py b/graphene-django/graphene_django/debug/middleware.py
index 01b09e7b..40c1c32e 100644
--- a/graphene-django/graphene_django/debug/middleware.py
+++ b/graphene-django/graphene_django/debug/middleware.py
@@ -49,7 +49,8 @@ class DjangoDebugMiddleware(object):
                 raise Exception('DjangoDebug need the context to be writable, context received: {}.'.format(
                     context.__class__.__name__
                 ))
-        if info.schema.graphene_schema.T(DjangoDebug) == info.return_type:
+        print info.schema.get_type('DjangoDebug'), info.return_type
+        if info.schema.get_type('DjangoDebug') == info.return_type:
             return context.django_debug.get_debug_promise()
         promise = next(root, args, context, info)
         context.django_debug.add_promise(promise)
diff --git a/graphene-django/graphene_django/debug/sql/tracking.py b/graphene-django/graphene_django/debug/sql/tracking.py
index 3d86401a..9d14e4b1 100644
--- a/graphene-django/graphene_django/debug/sql/tracking.py
+++ b/graphene-django/graphene_django/debug/sql/tracking.py
@@ -8,7 +8,7 @@ from time import time
 from django.utils import six
 from django.utils.encoding import force_text
 
-from .types import DjangoDebugSQL, DjangoDebugPostgreSQL
+from .types import DjangoDebugSQL
 
 
 class SQLQueryTriggered(Exception):
@@ -142,9 +142,8 @@ class NormalCursorWrapper(object):
                     'iso_level': iso_level,
                     'encoding': conn.encoding,
                 })
-                _sql = DjangoDebugPostgreSQL(**params)
-            else:
-                _sql = DjangoDebugSQL(**params)
+
+            _sql = DjangoDebugSQL(**params)
             # We keep `sql` to maintain backwards compatibility
             self.logger.object.sql.append(_sql)
 
diff --git a/graphene-django/graphene_django/debug/sql/types.py b/graphene-django/graphene_django/debug/sql/types.py
index 6be6074c..6ae4d313 100644
--- a/graphene-django/graphene_django/debug/sql/types.py
+++ b/graphene-django/graphene_django/debug/sql/types.py
@@ -1,7 +1,7 @@
 from graphene import Boolean, Float, ObjectType, String
 
 
-class DjangoDebugBaseSQL(ObjectType):
+class DjangoDebugSQL(ObjectType):
     vendor = String()
     alias = String()
     sql = String()
@@ -13,12 +13,7 @@ class DjangoDebugBaseSQL(ObjectType):
     is_slow = Boolean()
     is_select = Boolean()
 
-
-class DjangoDebugSQL(DjangoDebugBaseSQL):
-    pass
-
-
-class DjangoDebugPostgreSQL(DjangoDebugBaseSQL):
+    # Postgres
     trans_id = String()
     trans_status = String()
     iso_level = String()
diff --git a/graphene-django/graphene_django/debug/tests/test_query.py b/graphene-django/graphene_django/debug/tests/test_query.py
index 4ecc54e5..421b2d5d 100644
--- a/graphene-django/graphene_django/debug/tests/test_query.py
+++ b/graphene-django/graphene_django/debug/tests/test_query.py
@@ -23,10 +23,11 @@ def test_should_query_field():
     r2 = Reporter(last_name='Griffin')
     r2.save()
 
-    class ReporterType(DjangoNode, DjangoObjectType):
+    class ReporterType(DjangoObjectType):
 
         class Meta:
             model = Reporter
+            interfaces = (DjangoNode, )
 
     class Query(graphene.ObjectType):
         reporter = graphene.Field(ReporterType)
@@ -69,13 +70,14 @@ def test_should_query_list():
     r2 = Reporter(last_name='Griffin')
     r2.save()
 
-    class ReporterType(DjangoNode, DjangoObjectType):
+    class ReporterType(DjangoObjectType):
 
         class Meta:
             model = Reporter
+            interfaces = (DjangoNode, )
 
     class Query(graphene.ObjectType):
-        all_reporters = ReporterType.List()
+        all_reporters = graphene.List(ReporterType)
         debug = graphene.Field(DjangoDebug, name='__debug')
 
         def resolve_all_reporters(self, *args, **kwargs):
@@ -117,10 +119,11 @@ def test_should_query_connection():
     r2 = Reporter(last_name='Griffin')
     r2.save()
 
-    class ReporterType(DjangoNode, DjangoObjectType):
+    class ReporterType(DjangoObjectType):
 
         class Meta:
             model = Reporter
+            interfaces = (DjangoNode, )
 
     class Query(graphene.ObjectType):
         all_reporters = DjangoConnectionField(ReporterType)
@@ -173,13 +176,15 @@ def test_should_query_connectionfilter():
     r2 = Reporter(last_name='Griffin')
     r2.save()
 
-    class ReporterType(DjangoNode, DjangoObjectType):
+    class ReporterType(DjangoObjectType):
 
         class Meta:
             model = Reporter
+            interfaces = (DjangoNode, )
 
     class Query(graphene.ObjectType):
         all_reporters = DjangoFilterConnectionField(ReporterType)
+        s = graphene.String(resolver=lambda *_: "S")
         debug = graphene.Field(DjangoDebug, name='__debug')
 
         def resolve_all_reporters(self, *args, **kwargs):
diff --git a/graphene-django/graphene_django/debug/types.py b/graphene-django/graphene_django/debug/types.py
index a75839c1..891fe38e 100644
--- a/graphene-django/graphene_django/debug/types.py
+++ b/graphene-django/graphene_django/debug/types.py
@@ -1,6 +1,6 @@
 from graphene import ObjectType, List
-from .sql.types import DjangoDebugBaseSQL
+from .sql.types import DjangoDebugSQL
 
 
 class DjangoDebug(ObjectType):
-    sql = List(DjangoDebugBaseSQL)
+    sql = List(DjangoDebugSQL)
diff --git a/graphene-django/graphene_django/fields.py b/graphene-django/graphene_django/fields.py
index b573a9aa..789a84ba 100644
--- a/graphene-django/graphene_django/fields.py
+++ b/graphene-django/graphene_django/fields.py
@@ -22,9 +22,6 @@ class DjangoConnectionField(ConnectionField):
         else:
             return self.model._default_manager
 
-    def default_resolver(self, root, args, context, info):
-        return getattr(root, self.source, self.get_manager())
-
     @staticmethod
     def connection_resolver(resolver, connection, default_manager, root, args, context, info):
         iterable = resolver(root, args, context, info)