I'm trying to instantiate a recursive object model via the admin, but
am getting an error.


My model:

class Bracket(models.Model):
    m = models.ForeignKey(OtherModel)
    parent = models.ForeignKey('self', blank=True, null=True)
    name = models.CharField(max_length = 30)


The error:

IntegrityError at /admin/myapp/bracket/add/

myapp_bracket.parent_id may not be NULL

Request Method:         POST
Request URL:    http://mysite/admin/myapp/bracket/add/
Exception Type:         IntegrityError
Exception Value:

myapp_bracket.parent_id may not be NULL


What do I need to let the admin interface allow me to enter a root
level instance?  I was able to enter the brackets via the shell, so I
think the model is set up properly.
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