Fixing #26524 -- Made a foreign key id reference in ModelAdmin.list_display display the id.

1 files changed, 12 insertions, 0 deletions

diff --git a/tests/admin_views/tests.py b/tests/admin_views/tests.py
index 6455b210b2..e706ba7105 100644
--- a/tests/admin_views/tests.py
+++ b/tests/admin_views/tests.py
@@ -538,6 +538,18 @@ class AdminViewBasicTest(AdminViewBasicTestCase):
             self.assertContentBefore(response, 'The First Item', 'The Middle Item')
             self.assertContentBefore(response, 'The Middle Item', 'The Last Item')
 
+    def test_has_related_field_in_list_display(self):
+        """Joins shouldn't be performed for <FK>_id fields in list display."""
+        state = State.objects.create(name='Karnataka')
+        City.objects.create(state=state, name='Bangalore')
+        response = self.client.get(reverse('admin:admin_views_city_changelist'), {})
+
+        response.context['cl'].list_display = ['id', 'name', 'state']
+        self.assertEqual(response.context['cl'].has_related_field_in_list_display(), True)
+
+        response.context['cl'].list_display = ['id', 'name', 'state_id']
+        self.assertEqual(response.context['cl'].has_related_field_in_list_display(), False)
+
     def test_limited_filter(self):
         """Ensure admin changelist filters do not contain objects excluded via limit_choices_to.
         This also tests relation-spanning filters (e.g. 'color__value').