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-rw-r--r--tests/delete_regress/tests.py14
1 files changed, 14 insertions, 0 deletions
diff --git a/tests/delete_regress/tests.py b/tests/delete_regress/tests.py
index 97a7d6ba02..fe758eab74 100644
--- a/tests/delete_regress/tests.py
+++ b/tests/delete_regress/tests.py
@@ -1,6 +1,7 @@
import datetime
from django.db import connection, models, transaction
+from django.db.models import Exists, OuterRef
from django.test import (
SimpleTestCase, TestCase, TransactionTestCase, skipUnlessDBFeature,
)
@@ -355,6 +356,19 @@ class DeleteTests(TestCase):
self.assertEqual(researcher2.primary_contact, contact2)
self.assertIsNone(researcher2.secondary_contact)
+ def test_self_reference_with_through_m2m_at_second_level(self):
+ toy = Toy.objects.create(name='Paints')
+ child = Child.objects.create(name='Juan')
+ Book.objects.create(pagecount=500, owner=child)
+ PlayedWith.objects.create(child=child, toy=toy, date=datetime.date.today())
+ Book.objects.filter(Exists(
+ Book.objects.filter(
+ pk=OuterRef('pk'),
+ owner__toys=toy.pk,
+ ),
+ )).delete()
+ self.assertIs(Book.objects.exists(), False)
+
class DeleteDistinct(SimpleTestCase):
def test_disallowed_delete_distinct(self):