core: include parent group name

Signed-off-by: Jens Langhammer <jens.langhammer@beryju.org>

authentik/core/api/groups.py

@@ -2,8 +2,8 @@
 from django.db.models.query import QuerySet
 from django_filters.filters import ModelMultipleChoiceFilter
 from django_filters.filterset import FilterSet
-from rest_framework.fields import CharField, JSONField
-from rest_framework.serializers import ListSerializer, ModelSerializer
+from rest_framework.fields import CharField, JSONField, SerializerMethodField
+from rest_framework.serializers import ListSerializer, ModelSerializer, Serializer
 from rest_framework.viewsets import ModelViewSet
 from rest_framework_guardian.filters import ObjectPermissionsFilter
 
@@ -42,6 +42,7 @@ class GroupSerializer(ModelSerializer):
     users_obj = ListSerializer(
         child=GroupMemberSerializer(), read_only=True, source="users", required=False
     )
+    parent_name = CharField(source="parent.name", read_only=True)
 
     class Meta:
 
@@ -51,6 +52,7 @@ class GroupSerializer(ModelSerializer):
             "name",
             "is_superuser",
             "parent",
+            "parent_name",
             "users",
             "attributes",
             "users_obj",