On Sep 22, 10:16 pm, Nicolas Steinmetz <nsteinm...@gmail.com> wrote:
> Hello,
>
> I would like to present only a subset of a given models. But so far,
> in the admin, I have no value whereas there should be some.
>
> I tried several syntax but did not find the right one.
>
> Here are my implicated (and simplified) models :
>
> class Dns(models.Model):
> """
> DNS description
> """
> TYPEDNS_CHOICES = (
> ('1', 'Reference'),
> ('2', 'Normal'),
> )
> name = models.CharField(blank=True, max_length=100)
> dnstype = models.CharField(max_length=100,
> choices=TYPEDNS_CHOICES)
>
> class Url(models.Model):
> """
> Url description
> """
> name = models.CharField(blank=True, max_length=100)
> [...]
> cnamevalue = models.ForeignKey(Dns, limit_choices_to = {'dns':
> 'get_sql(Dns.dnstype="2")'}, blank=True)
>
> Could someone explain me what is the right syntax ?
>
> I could use formfield_for_foreignkey for admin contrib but I would
> prefer using limit_choices_to that I see as a native solution.
>
> http://docs.djangoproject.com/en/dev/ref/contrib/admin/#django.contri...
>
> Thanks,
> Nicolas
Seems like you're looking at the ForeignKey documentation. The
reference to get_sql() is confusing and very out of date on that page
- Q objects don't have such a method, although they may have done back
before the merge of queryset-refactor before version 1.0 was released.
Anyway, the syntax is simple:
limit_choices_to = {'dnstype': 2}
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