[1.5.x] Fix #19524 -- Incorrect caching of parents of unsaved model instances.

Thanks qcwxezdas for the report. Refs #13839.

Backport of e9c24be.

1 files changed, 18 insertions, 1 deletions

diff --git a/tests/regressiontests/admin_inlines/tests.py b/tests/regressiontests/admin_inlines/tests.py
index 3c868012fa..54283bf509 100644
--- a/tests/regressiontests/admin_inlines/tests.py
+++ b/tests/regressiontests/admin_inlines/tests.py
@@ -12,7 +12,7 @@ from .admin import InnerInline, TitleInline, site
 from .models import (Holder, Inner, Holder2, Inner2, Holder3, Inner3, Person,
     OutfitItem, Fashionista, Teacher, Parent, Child, Author, Book, Profile,
     ProfileCollection, ParentModelWithCustomPk, ChildModel1, ChildModel2,
-    Title)
+    Sighting, Title)
 
 
 @override_settings(PASSWORD_HASHERS=('django.contrib.auth.hashers.SHA1PasswordHasher',))
@@ -172,6 +172,23 @@ class TestInline(TestCase):
         self.assertContains(response, child1_shortcut)
         self.assertContains(response, child2_shortcut)
 
+    def test_create_inlines_on_inherited_model(self):
+        """
+        Ensure that an object can be created with inlines when it inherits
+        another class. Bug #19524.
+        """
+        data = {
+            'name': 'Martian',
+            'sighting_set-TOTAL_FORMS': 1,
+            'sighting_set-INITIAL_FORMS': 0,
+            'sighting_set-MAX_NUM_FORMS': 0,
+            'sighting_set-0-place': 'Zone 51',
+            '_save': 'Save',
+        }
+        response = self.client.post('/admin/admin_inlines/extraterrestrial/add/', data)
+        self.assertEqual(response.status_code, 302)
+        self.assertEqual(Sighting.objects.filter(et__name='Martian').count(), 1)
+
 
 @override_settings(PASSWORD_HASHERS=('django.contrib.auth.hashers.SHA1PasswordHasher',))
 class TestInlineMedia(TestCase):