Re: optional ForeignKey

Ah, OK, Thanks!
I didn't know that blank and null are available for all field-types, I
should have known.

Thanks!!

On Mon, Jun 21, 2010 at 15:41, Karen Tracey <kmtracey@gmail.com> wrote:
> On Mon, Jun 21, 2010 at 10:37 AM, Magnus Valle <wiscados@gmail.com> wrote:
>>
>> Hi,
>> I'm trying to make model that has itself as a foreign key, in an
>> attempt to store a reverse tree in Django.
>> However, I can't find a way to set a default value to
>> models.ForeignKey or make it optional.
>>
>> My model is like this:
>> class Node(models.Model):
>>    name = models.CharField(max_length=100)
>>    parent = models.ForeignKey('self')
>>
>> runserver doesn't complain, but whenever I try to enter data to the
>> model with Django's admin interface I get a "This field is required."
>> message, and it want's me to select a entry, but there are none.
>
>
> You make a ForeignKey field optional by specifying blank=True, null=True:
>
> http://docs.djangoproject.com/en/1.2/ref/models/fields/#null
>
> Karen
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> http://tracey.org/kmt/
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--
Magnus

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