gistfile1.pytb

$ python3 ./tests/runtests.py model_inheritance_regress
Creating test database for alias 'default'...
Creating test database for alias 'other'...
E.....x.F............
======================================================================
ERROR: test_abstract_base_class_m2m_relation_inheritance (model_inheritance_regress.tests.ModelInheritanceTest)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/Users/loic/Dev/django/tests/model_inheritance_regress/tests.py", line 386, in test_abstract_base_class_m2m_relation_inheritance
    messy_parent = messy.bachelorparty_ptr
AttributeError: 'BachelorParty' object has no attribute 'bachelorparty_ptr'

======================================================================
FAIL: test_inherited_manager (model_inheritance_regress.tests.ModelInheritanceTest)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/Users/loic/Dev/django/tests/model_inheritance_regress/tests.py", line 281, in test_inherited_manager
    self.assertFalse(hasattr(MessyBachelorParty, 'event_manager'))
AssertionError: True is not false

----------------------------------------------------------------------
Ran 21 tests in 0.093s

FAILED (failures=1, errors=1, expected failures=1)
Destroying test database for alias 'default'...
Destroying test database for alias 'other'...

patch.diff

diff --git a/tests/model_inheritance_regress/models.py b/tests/model_inheritance_regress/models.py
index 0f45a2c..16bdcf8 100644
--- a/tests/model_inheritance_regress/models.py
+++ b/tests/model_inheritance_regress/models.py
@@ -155,6 +155,8 @@ class Person(models.Model):
 class AbstractEvent(models.Model):
     name = models.CharField(max_length=100)
     attendees = models.ManyToManyField(Person, related_name="%(class)s_set")
+    objects = models.Manager()
+    event_manager = models.Manager()
 
     class Meta:
         abstract = True
@@ -164,10 +166,12 @@ class AbstractEvent(models.Model):
         return self.name
 
 class BirthdayParty(AbstractEvent):
-    pass
+    objects = models.Manager()
+    birthday_manager = models.Manager()
 
 class BachelorParty(AbstractEvent):
-    pass
+    objects = models.Manager()
+    bachelor_manager = models.Manager()
 
 class MessyBachelorParty(BachelorParty):
     pass
diff --git a/tests/model_inheritance_regress/tests.py b/tests/model_inheritance_regress/tests.py
index 7f78fc7..ad0751a 100644
--- a/tests/model_inheritance_regress/tests.py
+++ b/tests/model_inheritance_regress/tests.py
@@ -268,6 +268,19 @@ class ModelInheritanceTest(TestCase):
         pos = fragment.find('pub_date')
         self.assertEqual(fragment.find('pub_date', pos + 1), -1)
 
+    def test_inherited_manager(self):
+        self.assertEqual(BirthdayParty._meta.abstract, False)
+        self.assertTrue(hasattr(BirthdayParty, 'event_manager'))
+        self.assertTrue(hasattr(BirthdayParty, 'birthday_manager'))
+
+        self.assertEqual(BachelorParty._meta.abstract, False)
+        self.assertTrue(hasattr(BachelorParty, 'event_manager'))
+        self.assertTrue(hasattr(BachelorParty, 'bachelor_manager'))
+
+        self.assertEqual(MessyBachelorParty._meta.abstract, False)
+        self.assertFalse(hasattr(MessyBachelorParty, 'event_manager'))
+        self.assertFalse(hasattr(MessyBachelorParty, 'bachelor_manager'))
+
     def test_queryset_update_on_parent_model(self):
         """
         Regression test for #10362