On Mon, Mar 9, 2009 at 9:09 AM, uprising wrote:
>
> Thanks for your fast reply..
> You mean unique_together=(node_a, node_b)?
> No, that's not what I meant.
>
> I want to make sure if someone has created
> Edge(node_a=x, node_b=y).save()
> he can't add
> Edge(node_a=y, node_b=x).save()
> becaus
Thanks for your fast reply..
You mean unique_together=(node_a, node_b)?
No, that's not what I meant.
I want to make sure if someone has created
Edge(node_a=x, node_b=y).save()
he can't add
Edge(node_a=y, node_b=x).save()
because edge is a set of two distinct nodes.
On Mar 9, 8:54 pm, Alex Ga
On Mon, Mar 9, 2009 at 8:52 AM, uprising 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
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
On Mon, Mar 9, 2009 at 7:17 AM, Reiner wrote:
>
> Hi,
>
> have a look at the documentation of field options in models:
> http://docs.djangoproject.com/en/dev/ref/models/fields/#blank
>
> class Foo(models.Model):
>this_is_required = models.CharField(...)
>this_not = models.CharField(..., b
Hi,
have a look at the documentation of field options in models:
http://docs.djangoproject.com/en/dev/ref/models/fields/#blank
class Foo(models.Model):
this_is_required = models.CharField(...)
this_not = models.CharField(..., blank=True)
Regards,
Reiner
On Mar 9, 8:37 am, khsing wrote
I want create a model that contain two field and there is one of two
field can not be blank.
how to do it?
thanks.
--
A man live in jail and want to break.
http://blog.khsing.net
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