Use the name of class instead:
parent = models.ForeignKey("Category", blank=True, null=True,
verbose_name=_("parent"))
2011/3/5 mohammad Efazati <moham...@efazati.org>
> I have model field foreign key to self
> but sql have error and cant create null field for field
> why?
>
> class Category(models.Model):
> title = models.CharField(max_length=250,\
> unique=True, verbose_name=_("Title"))
> slug = models.SlugField(max_length=100,\
> verbose_name=_("Slug"),\
> help_text=_("This Field will fill\
> automaticaly by title"))
> parent = models.ForeignKey('self', blank=True, null=True,
> verbose_name=_("parent"))
>
> thanks
>
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