Added prefetch for actor field in admin

notifications/admin.py

@@ -10,5 +10,9 @@ class NotificationAdmin(admin.ModelAdmin):
                     'level', 'target', 'unread', 'public')
     list_filter = ('level', 'unread', 'public', 'timestamp',)
 
+    def get_queryset(self, request):
+        qs = super(NotificationAdmin, self).get_queryset(request)
+        return qs.prefetch_related('actor')
+
 
 admin.site.register(Notification, NotificationAdmin)

notifications/tests/tests.py

@@ -11,8 +11,10 @@ import pytz
 from django.conf import settings
 from django.contrib.auth.models import Group, User
 from django.core.exceptions import ImproperlyConfigured
+from django.db import connection
 from django.template import Context, Template
 from django.test import RequestFactory, TestCase
+from django.test.utils import CaptureQueriesContext
 from django.utils import timezone
 from django.utils.timezone import localtime, utc
 from notifications.models import Notification, notify_handler
@@ -510,3 +512,29 @@ class TagTest(TestCase):
         context = {"user":self.to_user}
         output = u"True"
         self.tag_test(template, context, output)
+
+
+class AdminTest(TestCase):
+    def setUp(self):
+        self.message_count = 10
+        self.from_user = User.objects.create_user(username="from", password="pwd", email="example@example.com")
+        self.to_user = User.objects.create_user(username="to", password="pwd", email="example@example.com")
+        self.to_user.is_staff = True
+        self.to_user.is_superuser = True
+        self.to_user.save()
+        for _ in range(self.message_count):
+            notify.send(
+                self.from_user,
+                recipient=self.to_user,
+                verb='commented',
+                action_object=self.from_user,
+            )
+
+    def test_list(self):
+        self.client.login(username='to', password='pwd')
+
+        with CaptureQueriesContext(connection=connection) as context:
+            response = self.client.get(reverse('admin:notifications_notification_changelist'))
+            self.assertLessEqual(len(context), 6)
+
+        self.assertEqual(response.status_code, 200, response.content)