Ticket #30557: 30557.diff

tests/model_inheritance/models.py

@@ -91 +91 @@
     def __str__(self):
         return "%s the place" % self.name
 
+    class Meta:
+        ordering = [models.F('name').desc(nulls_last=True)]
+
 
 class Rating(models.Model):
     rating = models.IntegerField(null=True, blank=True)

tests/ordering/models.py

@@ -59 +59 @@
 
     class Meta:
         ordering = ('article',)
+
+
+class SubArticle(Article):
+    pass

tests/ordering/tests.py

@@ -9 +9 @@
 from django.test import TestCase
 from django.utils.deprecation import RemovedInDjango31Warning
 
-from .models import Article, Author, OrderedByFArticle, Reference
+from .models import Article, Author, OrderedByFArticle, Reference, SubArticle
 
 
 class OrderingTests(TestCase):
@@ -462 +462 @@
             attrgetter('headline')
         )
 
+    def test_default_parent_ordering_by_expression(self):
+        sub1 = SubArticle.objects.create(headline='Sub 1', pub_date=datetime(2005, 7, 26))
+        sub2 = SubArticle.objects.create(headline='Sub 2', pub_date=datetime(2005, 7, 27))
+        articles = SubArticle.objects.order_by('article_ptr')
+        self.assertSequenceEqual(articles, [sub2, sub1])
+
     def test_deprecated_values_annotate(self):
         msg = (
             "Article QuerySet won't use Meta.ordering in Django 3.1. Add "