diff --git a/graphene_django/filter/fields.py b/graphene_django/filter/fields.py
index 7d8d2d8..244fb39 100644
--- a/graphene_django/filter/fields.py
+++ b/graphene_django/filter/fields.py
@@ -66,7 +66,7 @@ class DjangoFilterConnectionField(DjangoConnectionField):
             kwargs = {}
             for k, v in args.items():
                 if k in filtering_args:
-                    if k == "order_by":
+                    if k == "order_by" and v is not None:
                         v = to_snake_case(v)
                     kwargs[k] = v
             return kwargs
diff --git a/graphene_django/filter/tests/test_fields.py b/graphene_django/filter/tests/test_fields.py
index fa8060b..9c94f06 100644
--- a/graphene_django/filter/tests/test_fields.py
+++ b/graphene_django/filter/tests/test_fields.py
@@ -1224,7 +1224,7 @@ def test_filter_filterset_based_on_mixin():
         }
     }
 
-    result = schema.execute(query, variable_values={"email": reporter_1.email})
+    result = schema.execute(query, variable_values={"email": reporter_1.email},)
 
     assert not result.errors
     assert result.data == expected
diff --git a/graphene_django/views.py b/graphene_django/views.py
index 3123118..8341fc4 100644
--- a/graphene_django/views.py
+++ b/graphene_django/views.py
@@ -94,6 +94,7 @@ class GraphQLView(View):
         pretty=False,
         batch=False,
         subscription_path=None,
+        execution_context_class=None,
     ):
         if not schema:
             schema = graphene_settings.SCHEMA
@@ -111,6 +112,7 @@ class GraphQLView(View):
         self.pretty = self.pretty or pretty
         self.graphiql = self.graphiql or graphiql
         self.batch = self.batch or batch
+        self.execution_context_class = execution_context_class
         if subscription_path is None:
             self.subscription_path = graphene_settings.SUBSCRIPTION_PATH
 
@@ -307,10 +309,8 @@ class GraphQLView(View):
 
         try:
             extra_options = {}
-            if getattr(self, "executor", None):
-                # We only include it optionally since
-                # executor is not a valid argument in all backends
-                extra_options["executor"] = self.executor
+            if self.execution_context_class:
+                extra_options["execution_context_class"] = self.execution_context_class
 
             options = {
                 "source": query,