id	summary	reporter	owner	description	type	status	component	version	severity	resolution	keywords	cc	stage	has_patch	needs_docs	needs_tests	needs_better_patch	easy	ui_ux
3770	OneToOneField cannot be a primary key	moof@…	Jacob	"Similar to #3768, in the [source:django/trunk/tests/regressiontests/serializers_regress/models.py#4757 serializer regression tests] you have: 

{{{
#!python
class O2OData(models.Model):
    data = models.OneToOneField(Anchor, null=True)
}}}

This cannot be made true for SQL server, as no NULL field can be a primary key.

More to the point, I fail to see how a field like this could ever be a primary key.

This test should be removed."		closed	Core (Serialization)	dev		fixed	tests		Unreviewed	0	0	0	0	0	0