UUID as default value in Django model

Question

I\'ve noticed the strange behaviour of default value in django model. For example we have a simple django model:

import uuid
...

class SiteUser(models.Model):
          


        

Answer 1

Problem is the default attribute that you are setting as

activation_key = models.CharField(max_length=64, verbose_name=u"Activation key",
                 default=uuid.uuid1())

Here you are setting the default value as not a callable but value returned by uuid.uuid1() call when this model class is initialized.

You should set it as default=uuid.uuid1 which sets it as callable, and is sets new uuid each time new default value needs to be used.