fix: declaration of required variable in filters v3 (#1137)

* fix: declaration of required variable

* Add unit test

* Fix formating

Co-authored-by: Thomas Leonard <thomas@loftorbital.com>

graphene_django/filter/tests/test_fields.py

@@ -16,7 +16,7 @@ pytestmark = []
 
 if DJANGO_FILTER_INSTALLED:
     import django_filters
-    from django_filters import FilterSet, NumberFilter
+    from django_filters import FilterSet, NumberFilter, OrderingFilter
 
     from graphene_django.filter import (
         GlobalIDFilter,
@@ -1275,3 +1275,22 @@ def test_filter_string_contains():
     assert result.data == {
         "people": {"edges": [{"node": {"name": "Joe"}}, {"node": {"name": "Bob"}},]}
     }
+
+
+def test_only_custom_filters():
+    class ReporterFilter(FilterSet):
+        class Meta:
+            model = Reporter
+            fields = []
+
+        some_filter = OrderingFilter(fields=("name",))
+
+    class ReporterFilterNode(DjangoObjectType):
+        class Meta:
+            model = Reporter
+            interfaces = (Node,)
+            fields = "__all__"
+            filterset_class = ReporterFilter
+
+    field = DjangoFilterConnectionField(ReporterFilterNode)
+    assert_arguments(field, "some_filter")

graphene_django/filter/utils.py

@@ -37,6 +37,7 @@ def get_filtering_args_from_filterset(filterset_class, type):
     registry = type._meta.registry
     for name, filter_field in filterset_class.base_filters.items():
         filter_type = filter_field.lookup_expr
+        required = filter_field.extra.get("required", False)
         field_type = None
         form_field = None
 
@@ -47,8 +48,6 @@ def get_filtering_args_from_filterset(filterset_class, type):
             or isinstance(filter_field, ArrayFilter)
         ):
             # Get the filter field for filters that are no explicitly declared.
-
-            required = filter_field.extra.get("required", False)
             if filter_type == "isnull":
                 field = graphene.Boolean(required=required)
             else: