On Thu, Jul 14, 2011 at 2:09 PM, tom <thomas.st...@gmail.com> wrote:
> Hello,
>
> I have following proxy model
>
> class UserForSubdomain(User):
> """
> This Model acts as a proxy to the django model:``User`` and
> allows to store the subdomain with the username to support
> the same usernames with different subdomains.
> The username is split with the first '.'. The first part is the
> subdomain, everything that follows is the username.
> """
> class Meta:
> proxy = True
>
> def get_username(self):
> domain = u_name = None
> try:
> domain, u_name = self.username.split('.', 1)
> except ValueError:
> #return the username if there is no . in the username
> u_name = self.username
> logger.debug('Full username for id %s is "%s". Split is:
> "%s"."%s"' % (self.id, self.username, domain, u_name))
> return u_name
>
> def __unicode__(self):
> if self.first_name and self.last_name:
> return self.get_full_name()
> else:
> return self.get_username()
>
> When I cast a ``User`` object to a ``UserForSubdomain`` object,
> somehow the values of the properties are not available anymore. I do
> this
>
>>>> user = User.objects.get(username = 'xyz.tstagl')
>>>> print user
> xyz.tstagl
>>>> s_user = UserForSubdomain(user)
>>>> print s_user
>
>>>> print s_user.get_username()
>
>>>>
>
> Has someone an idea what I am doing wrong here? I think I am missing
> something obvious, but I can't find out what.
>
> Many thanks for your help!
>
> regards, tom
>
You're missing that there is no such thing as casting in python.
"UserForSubdomain(user)" attempts to construct a new UserForSubdomain
object by calling __init__ with a User object as the first positional
parameter.
If you want a UserForSubdomain from a User, the simplest way is to
fetch it from the database, using the user id.
Cheers
Tom
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