core: only prefetch related objects when required (#9476)

* core: only prefetch related objects when required

Signed-off-by: Jens Langhammer <jens@goauthentik.io>

* add tests

Signed-off-by: Jens Langhammer <jens@goauthentik.io>

* add tests to assert query count

Signed-off-by: Jens Langhammer <jens@goauthentik.io>

* "optimize" another query away

Signed-off-by: Jens Langhammer <jens@goauthentik.io>

* prefetch parent and roles

Signed-off-by: Jens Langhammer <jens@goauthentik.io>

* whops that needs to be pre-fetched

Signed-off-by: Jens Langhammer <jens@goauthentik.io>

---------

Signed-off-by: Jens Langhammer <jens@goauthentik.io>

authentik/core/api/groups.py

@@ -154,12 +154,18 @@ class GroupViewSet(UsedByMixin, ModelViewSet):
 
         pk = IntegerField(required=True)
 
-    queryset = Group.objects.all().select_related("parent").prefetch_related("users")
+    queryset = Group.objects.none()
     serializer_class = GroupSerializer
     search_fields = ["name", "is_superuser"]
     filterset_class = GroupFilter
     ordering = ["name"]
 
+    def get_queryset(self):
+        base_qs = Group.objects.all().select_related("parent").prefetch_related("roles")
+        if self.serializer_class(context={"request": self.request})._should_include_users:
+            base_qs = base_qs.prefetch_related("users")
+        return base_qs
+
     @extend_schema(
         parameters=[
             OpenApiParameter("include_users", bool, default=True),

authentik/core/api/users.py

@@ -407,8 +407,11 @@ class UserViewSet(UsedByMixin, ModelViewSet):
     search_fields = ["username", "name", "is_active", "email", "uuid"]
     filterset_class = UsersFilter
 
-    def get_queryset(self):  # pragma: no cover
-        return User.objects.all().exclude_anonymous().prefetch_related("ak_groups")
+    def get_queryset(self):
+        base_qs = User.objects.all().exclude_anonymous()
+        if self.serializer_class(context={"request": self.request})._should_include_groups:
+            base_qs = base_qs.prefetch_related("ak_groups")
+        return base_qs
 
     @extend_schema(
         parameters=[

authentik/core/tests/test_groups_api.py

@@ -5,7 +5,7 @@ from guardian.shortcuts import assign_perm
 from rest_framework.test import APITestCase
 
 from authentik.core.models import Group, User
-from authentik.core.tests.utils import create_test_user
+from authentik.core.tests.utils import create_test_admin_user, create_test_user
 from authentik.lib.generators import generate_id
 
 
@@ -16,6 +16,13 @@ class TestGroupsAPI(APITestCase):
         self.login_user = create_test_user()
         self.user = User.objects.create(username="test-user")
 
+    def test_list_with_users(self):
+        """Test listing with users"""
+        admin = create_test_admin_user()
+        self.client.force_login(admin)
+        response = self.client.get(reverse("authentik_api:group-list"), {"include_users": "true"})
+        self.assertEqual(response.status_code, 200)
+
     def test_add_user(self):
         """Test add_user"""
         group = Group.objects.create(name=generate_id())

authentik/core/tests/test_users_api.py

@@ -41,6 +41,12 @@ class TestUsersAPI(APITestCase):
         )
         self.assertEqual(response.status_code, 200)
 
+    def test_list_with_groups(self):
+        """Test listing with groups"""
+        self.client.force_login(self.admin)
+        response = self.client.get(reverse("authentik_api:user-list"), {"include_groups": "true"})
+        self.assertEqual(response.status_code, 200)
+
     def test_metrics(self):
         """Test user's metrics"""
         self.client.force_login(self.admin)

authentik/core/tests/test_users_avatars.py

@@ -8,7 +8,6 @@ from rest_framework.test import APITestCase
 
 from authentik.core.models import User
 from authentik.core.tests.utils import create_test_admin_user
-from authentik.lib.config import CONFIG
 from authentik.tenants.utils import get_current_tenant
 
 
@@ -25,7 +24,6 @@ class TestUsersAvatars(APITestCase):
         tenant.avatars = mode
         tenant.save()
 
-    @CONFIG.patch("avatars", "none")
     def test_avatars_none(self):
         """Test avatars none"""
         self.set_avatar_mode("none")

authentik/events/middleware.py

@@ -116,12 +116,12 @@ class AuditMiddleware:
             return user
         user = getattr(request, "user", self.anonymous_user)
         if not user.is_authenticated:
+            self._ensure_fallback_user()
             return self.anonymous_user
         return user
 
     def connect(self, request: HttpRequest):
         """Connect signal for automatic logging"""
-        self._ensure_fallback_user()
         if not hasattr(request, "request_id"):
             return
         post_save.connect(