class db_one(models.Model):
    parent = models.ForeignKey('self')
    title = models.CharField(max_length=45)

models.db_one.objects.all()

models.db_one.objects.all()\
    .values('id',
               'parent_id',
               'parent__title',
               'title')

    models.ForeignKey('self', null=True, blank=True)