On Mon, Mar 9, 2009 at 8:52 AM, uprising <upris...@gmail.com> wrote:
>
> Just reminded of a problem by this post, how can I validate a unique
> pair of nodes like this:
>
> class Edge(models.Model):
> node_a: models.ForeignKey(Node)
> node_b: models.ForeignKey(Node)
>
> I mean if I already have {"node_a": 1, "node_b": 2}, I can't add
> {"node_a": 2, "node_b": 1}
> How to enforce this restriction efficiently?
>
> >
>
Are you looking to maintain cross field uniqueness, if so:
http://docs.djangoproject.com/en/dev/ref/models/options/#unique-together
ALex
--
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say it." --Voltaire
"The people's good is the highest law."--Cicero
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