On Sat, May 9, 2009 at 10:58 AM, Bro <coolpari...@gmail.com> wrote:
>
> Here is the code :
>
> class Category(models.Model):
> parent = models.ForeignKey('self', blank=True, null=True)
> name = models.CharField(max_length=63)
> def __unicode__(self):
> return self.name
>
> I don't understand why but when I create a category in the admin page,
> there is this error :
>
> Exception Type: IntegrityError
> Exception Value: commercial_category.parent_id may not be NULL
>
> I try to make the parent ForeignKey optional but it doesn't work
>
> Thanks for you help
> >
>
Did you syncdb before settings the fkey to null?
Alex
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