#30531: Exception when creating an inherited model object with existing base
-------------------------------------+-------------------------------------
Reporter: Victor | Owner: nobody
Porton |
Type: Bug | Status: new
Component: Database | Version: 2.2
layer (models, ORM) |
Severity: Normal | Keywords:
Triage Stage: | Has patch: 0
Unreviewed |
Needs documentation: 0 | Needs tests: 0
Patch needs improvement: 0 | Easy pickings: 0
UI/UX: 0 |
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The following intuitively right causes an exception:
{{{
class Base(models.Model):
v = models.IntegerField()
class Derived(Base):
base = models.OneToOneField(Base, on_delete=models.CASCADE,
primary_key=True)
class BugTestCase(TestCase):
def setUp(self):
self.base = Base.objects.create(v=0)
def test_bug(self):
Derived.objects.create(base=self.base)
}}}
Here it is:
{{{
django.db.utils.IntegrityError: NOT NULL constraint failed: mytest_base.v
}}}
It should work in the expected way not to raise an exception.
In the project I am developing now, I am going to write a workaround with
a raw SQL query :-(
I will attach full test source.
--
Ticket URL: <https://code.djangoproject.com/ticket/30531>
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