Refs #29138 -- Added extra tests for autocomplete FK to_field variations.

tests/admin_views/models.py

@@ -622,6 +622,7 @@ class WorkHour(models.Model):
 
 
 class Question(models.Model):
+    big_id = models.BigAutoField(primary_key=True)
     question = models.CharField(max_length=20)
     posted = models.DateField(default=datetime.date.today)
     expires = models.DateTimeField(null=True, blank=True)

tests/admin_views/test_autocomplete_view.py

@@ -94,6 +94,30 @@ class AutocompleteJsonViewTests(AdminViewBasicTestCase):
             'pagination': {'more': False},
         })
 
+    def test_custom_to_field_permission_denied(self):
+        Question.objects.create(question='Is this a question?')
+        request = self.factory.get(self.url, {'term': 'is', **self.opts, 'field_name': 'question_with_to_field'})
+        request.user = self.user
+        with self.assertRaises(PermissionDenied):
+            AutocompleteJsonView.as_view(**self.as_view_args)(request)
+
+    def test_custom_to_field_custom_pk(self):
+        q = Question.objects.create(question='Is this a question?')
+        opts = {
+            'app_label': Question._meta.app_label,
+            'model_name': Question._meta.model_name,
+            'field_name': 'related_questions',
+        }
+        request = self.factory.get(self.url, {'term': 'is', **opts})
+        request.user = self.superuser
+        response = AutocompleteJsonView.as_view(**self.as_view_args)(request)
+        self.assertEqual(response.status_code, 200)
+        data = json.loads(response.content.decode('utf-8'))
+        self.assertEqual(data, {
+            'results': [{'id': str(q.big_id), 'text': q.question}],
+            'pagination': {'more': False},
+        })
+
     def test_field_does_not_exist(self):
         request = self.factory.get(self.url, {'term': 'is', **self.opts, 'field_name': 'does_not_exist'})
         request.user = self.superuser