Fixed #22550 -- Prohibited QuerySet.last()/reverse() after slicing.

1 files changed, 8 insertions, 0 deletions

diff --git a/tests/ordering/tests.py b/tests/ordering/tests.py
index de49626cf4..ff749331b9 100644
--- a/tests/ordering/tests.py
+++ b/tests/ordering/tests.py
@@ -203,6 +203,14 @@ class OrderingTests(TestCase):
             attrgetter("headline")
         )
 
+    def test_no_reordering_after_slicing(self):
+        msg = 'Cannot reverse a query once a slice has been taken.'
+        qs = Article.objects.all()[0:2]
+        with self.assertRaisesMessage(TypeError, msg):
+            qs.reverse()
+        with self.assertRaisesMessage(TypeError, msg):
+            qs.last()
+
     def test_extra_ordering(self):
         """
         Ordering can be based on fields included from an 'extra' clause