Fixed #26632 -- Skipped admin.E111 list_display_links check if get_list_display() is overridden.

django/contrib/admin/checks.py

@@ -655,16 +655,21 @@ class ModelAdminChecks(BaseModelAdminChecks):
     def _check_list_display_links(self, obj):
         """ Check that list_display_links is a unique subset of list_display.
         """
+        from django.contrib.admin.options import ModelAdmin
 
         if obj.list_display_links is None:
             return []
         elif not isinstance(obj.list_display_links, (list, tuple)):
             return must_be('a list, a tuple, or None', option='list_display_links', obj=obj, id='admin.E110')
-        else:
+        # Check only if ModelAdmin.get_list_display() isn't overridden.
+        elif obj.get_list_display.__code__ is ModelAdmin.get_list_display.__code__:
+            # Use obj.get_list_display.__func__ is ModelAdmin.get_list_display
+            # when dropping PY2.
             return list(chain(*[
                 self._check_list_display_links_item(obj, field_name, "list_display_links[%d]" % index)
                 for index, field_name in enumerate(obj.list_display_links)
             ]))
+        return []
 
     def _check_list_display_links_item(self, obj, field_name, label):
         if field_name not in obj.list_display:

tests/modeladmin/test_checks.py

@@ -526,6 +526,35 @@ class ListDisplayLinksCheckTests(CheckTestCase):
 
         self.assertIsValid(TestModelAdmin, ValidationTestModel)
 
+    def test_list_display_links_check_skipped_if_get_list_display_overridden(self):
+        """
+        list_display_links check is skipped if get_list_display() is overridden.
+        """
+        class TestModelAdmin(ModelAdmin):
+            list_display_links = ['name', 'subtitle']
+
+            def get_list_display(self, request):
+                pass
+
+        self.assertIsValid(TestModelAdmin, ValidationTestModel)
+
+    def test_list_display_link_checked_for_list_tuple_if_get_list_display_overridden(self):
+        """
+        list_display_links is checked for list/tuple/None even if
+        get_list_display() is overridden.
+        """
+        class TestModelAdmin(ModelAdmin):
+            list_display_links = 'non-list/tuple'
+
+            def get_list_display(self, request):
+                pass
+
+        self.assertIsInvalid(
+            TestModelAdmin, ValidationTestModel,
+            "The value of 'list_display_links' must be a list, a tuple, or None.",
+            'admin.E110'
+        )
+
 
 class ListFilterTests(CheckTestCase):