[3.2.x] Fixed #32433 -- Added error message on QuerySet.delete() following distinct().

Backport of 6307c3f1a123f5975c73b231e8ac4f115fd72c0d from master

1 files changed, 12 insertions, 1 deletions

diff --git a/tests/delete_regress/tests.py b/tests/delete_regress/tests.py
index e4fa59e89f..97a7d6ba02 100644
--- a/tests/delete_regress/tests.py
+++ b/tests/delete_regress/tests.py
@@ -1,7 +1,9 @@
 import datetime
 
 from django.db import connection, models, transaction
-from django.test import TestCase, TransactionTestCase, skipUnlessDBFeature
+from django.test import (
+    SimpleTestCase, TestCase, TransactionTestCase, skipUnlessDBFeature,
+)
 
 from .models import (
     Award, AwardNote, Book, Child, Contact, Eaten, Email, File, Food, FooFile,
@@ -352,3 +354,12 @@ class DeleteTests(TestCase):
         self.assertEqual(researcher1.secondary_contact, contact2)
         self.assertEqual(researcher2.primary_contact, contact2)
         self.assertIsNone(researcher2.secondary_contact)
+
+
+class DeleteDistinct(SimpleTestCase):
+    def test_disallowed_delete_distinct(self):
+        msg = 'Cannot call delete() after .distinct().'
+        with self.assertRaisesMessage(TypeError, msg):
+            Book.objects.distinct().delete()
+        with self.assertRaisesMessage(TypeError, msg):
+            Book.objects.distinct('id').delete()