Hi,
I think you might want to use a common abstract base class. You want a
completely separate database table for the two models, right?
Collin
On Wednesday, January 21, 2015 at 10:17:08 PM UTC-5, Samuel Jean wrote:
>
> Hi there,
>
> Does anybody know of a way to trick Django 1.7 (or the proper way, if
> any) to modify the property of an inherited field so that it has unique
> property on the children only.
>
> Consider this abstract model :
>
> class UniqueObjectModel(models.Model):
> uuid = models.CharField(max_length=36, default=uuid4)
> pool = models.ForeignKey('Pool', related_name='+', to_field='uuid')
> ...
>
> class Meta:
> abstract = True
> unique_together = (('uuid', 'pool'),)
>
> I would like the Pool model to inherit from UniqueObjectModel *but* have
> its uuid field unique.
>
> class Pool(UniqueObjectModel):
> def __init__(self, *args, **kwargs):
> super(Pool, self).__init__(*args, **kwargs)
> self._meta.get_field('pool').to = 'self'
> self._meta.get_field('uuid')._unique = True
>
> However, Django still complains about Pool.uuid field not being unique.
>
> $ python manage.py makemigrations myapp
>
> CommandError: System check identified some issues:
>
> ERRORS:
> myapp.Controller.pool: (fields.E311) 'Pool.uuid' must set unique=True
> because it is referenced by a foreign key.
>
> Any ideas?
>
> Thanks!
>
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