AbstractBaseUser with a foreignkey...

[Vanni Brutto]

i'm trying to use AbstractBaseUser to extend the user model...

i used the code found on django pages, the only difference is that i use a foreignkey to "Sistema" models.

The originale code is on django pages: https://docs.djangoproject.com/en/dev/topics/auth/customizing/

my changes was:

[...]

class Sistema(models.Model):

    models.ForeignKey(settings.AUTH_USER_MODEL)

    nome = models.CharField(max_length=80)

    def __unicode__(self):

        return self.nome

    class Meta:

        verbose_name_plural = "Sistemi"

[...]

class MyUser(AbstractBaseUser):

    email = models.EmailField(

        verbose_name='email address',

        max_length=255,

        unique=True,

        db_index=True,

    )

    date_of_birth = models.DateField()

    is_active = models.BooleanField(default=True)

    is_admin = models.BooleanField(default=False)

    TIPO_CHOICES = (

        ('C', 'Cameriere'),

        ('G', 'Guest'),

        ('A', 'Admin'),

    )

    tipo = models.CharField(max_length=1, choices=TIPO_CHOICES, default="C")

    sistema = models.ForeignKey(Sistema)

when create the db with syncdb i got:

ds\createsuperuser.py", line 116, in handle

    user_data[field_name] = field.clean(raw_value, None)

  File "C:\apps\Python27\Lib\site-packages\django\db\models\fields\__init__.py",

 line 255, in clean

    self.validate(value, model_instance)

  File "C:\apps\Python27\Lib\site-packages\django\db\models\fields\related.py",

line 1189, in validate

    using = router.db_for_read(model_instance.__class__, instance=model_instance

)

  File "C:\apps\Python27\Lib\site-packages\django\db\utils.py", line 250, in _ro

ute_db

    return hints['instance']._state.db or DEFAULT_DB_ALIAS

AttributeError: 'NoneType' object has no attribute '_state'

C:\apps\xampp\htdocs\py\comanda>

[Vincenzo Prignano]

I think the problem here is that when you create the superuser, the related field will not be created.

You should add sistema = models.ForeignKey('Sistema', null=True) or sistema = models.ForeignKey('Sistema', default=1) where 1 is a placeholder 'Sistema' object that you have created.

I suggest to just use the null method as it designs a better system.