From 0c0240aba8c769406248b5601126b891998fabb7 Mon Sep 17 00:00:00 2001
From: Carlton Gibson <carlton.gibson@noumenal.es>
Date: Tue, 15 Jun 2021 11:41:50 +0200
Subject: [PATCH] Refs #30427, Refs #16176 -- Added test for abstract model
inheritance.
---
.../test_abstract_inheritance.py | 30 +++++++++++++++++++
1 file changed, 30 insertions(+)
diff --git a/tests/model_inheritance/test_abstract_inheritance.py b/tests/model_inheritance/test_abstract_inheritance.py
index 8caa5153fa..27b390d9f6 100644
--- a/tests/model_inheritance/test_abstract_inheritance.py
+++ b/tests/model_inheritance/test_abstract_inheritance.py
@@ -59,6 +59,36 @@ class AbstractInheritanceTests(SimpleTestCase):
),
])
+ def test_target_field_may_be_pushed_down(self):
+ """
+ Where the Child model needs to inherit a field from a different base
+ than that given by depth-first resolution, the target field can be
+ **pushed down** by being re-declared.
+ """
+
+ class Root(models.Model):
+ name = models.CharField(max_length=255)
+
+ class Meta:
+ abstract = True
+
+ class ParentA(Root):
+ class Meta:
+ abstract = True
+
+ class ParentB(Root):
+ name = models.IntegerField()
+
+ class Meta:
+ abstract = True
+
+ class Child(ParentA, ParentB):
+ name = models.IntegerField()
+
+ self.assertEqual(Child.check(), [])
+ inherited_field = Child._meta.get_field('name')
+ self.assertTrue(isinstance(inherited_field, models.IntegerField))
+
def test_multiple_inheritance_cannot_shadow_concrete_inherited_field(self):
class ConcreteParent(models.Model):
name = models.CharField(max_length=255)