Fixes #6124: Location parent filter should return all child locations (not just those directly assigned)

docs/release-notes/version-2.11.md

@@ -18,6 +18,7 @@
 * [#6107](https://github.com/netbox-community/netbox/issues/6107) - Fix rack selection field on device form
 * [#6110](https://github.com/netbox-community/netbox/issues/6110) - Fix handling of TemplateColumn values for table export
 * [#6123](https://github.com/netbox-community/netbox/issues/6123) - Prevent device from being assigned to mismatched site and location
+* [#6124](https://github.com/netbox-community/netbox/issues/6124) - Location `parent` filter should return all child locations (not just those directly assigned)
 * [#6130](https://github.com/netbox-community/netbox/issues/6130) - Improve display of assigned models in custom fields list
 
 ---

netbox/dcim/filters.py

@@ -191,15 +191,18 @@ class LocationFilterSet(BaseFilterSet, NameSlugSearchFilterSet):
         to_field_name='slug',
         label='Site (slug)',
     )
-    parent_id = django_filters.ModelMultipleChoiceFilter(
+    parent_id = TreeNodeMultipleChoiceFilter(
         queryset=Location.objects.all(),
-        label='Rack group (ID)',
+        field_name='parent',
+        lookup_expr='in',
+        label='Location (ID)',
     )
-    parent = django_filters.ModelMultipleChoiceFilter(
-        field_name='parent__slug',
+    parent = TreeNodeMultipleChoiceFilter(
         queryset=Location.objects.all(),
+        field_name='parent',
+        lookup_expr='in',
         to_field_name='slug',
-        label='Rack group (slug)',
+        label='Location (slug)',
     )
 
     class Meta: