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
4681	filter on foreign keys with None doesn't return anything	Patrick Lauber <patrick.lauber@…>	Adrian Holovaty	"At the moment you have to do it like this:
{{{
class Category(models.Model):
    name = models.CharField(core=True, maxlength=64)
    parent = models.ForeignKey('self', blank=True, null=True, related_name='child')

def getNavigation(request,parent):
    if parent==None:
        return Category.objects.filter(parent__id__isnull=True).order_by('-priority')
    else:
        return Category.objects.filter(parent__id=parent).order_by('-priority')
}}}
I think for a newbie to Databases like me this not very intuitive. Wouldn't it be possible to make the isnull check automatically behind the scenes if the argument is None or an empty String?"		closed	Database layer (models, ORM)	dev		wontfix	filter foreignkey None		Unreviewed	0	0	0	0	0	0