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 14368 Reverse relation attribute for OneToOneField fails when set to None George Sakkis nobody "Initially reported by reopening #12420 (http://code.djangoproject.com/ticket/12420#comment:10), moved to a new ticket after the assignee's suggestion. Test case with the sample models used at #14043: {{{ In [6]: bob = Person.objects.create(age=34) In [7]: bobs_soul = Soul.objects.create(person=bob) In [8]: bob.soul == bobs_soul Out[8]: True In [9]: bob.soul = None --------------------------------------------------------------------------- AttributeError Traceback (most recent call last) --> 258 setattr(value, self.related.field.attname, getattr(instance, self.related.field.rel.get_related_field().attname)) 259 260 # Since we already know what the related object is, seed the related AttributeError: 'NoneType' object has no attribute 'person_id' }}} The offending lines are http://code.djangoproject.com/browser/django/trunk/django/db/models/fields/related.py#L258 and http://code.djangoproject.com/browser/django/trunk/django/db/models/fields/related.py#L264. It's clearly a bug because the comment at http://code.djangoproject.com/browser/django/trunk/django/db/models/fields/related.py#L238 explicitly mentions ""If null=True, we can assign null here"". " Bug closed Database layer (models, ORM) 1.2 Normal fixed OneToOneField, bug George Sakkis Yeago Filip Gruszczyński Ready for checkin 1 0 0 0 0 0