[Python-il] [pyweb-il:385] Re: a question re pluggable apps

Idan Gazit idan at pixane.com
Tue Sep 1 12:49:26 IDT 2009


There's an officially-sanctioned way to do it which is not far from  
what you suggest. It's in the docs, too:


The short of it is have one model which stores the "extended user  
profile data", with:

user = models.ForeignKey(User, unique=True)

And then in settings.py have AUTH_PROFILE_MODULE =  

If you have any user object, you can do user.get_profile() and it will  
return the related instance of your extended profile model.

There's also an older post by James Bennett on the subject, but it  
predates this "official" way so don't get confused.


On Sep 1, 2009, at 12:23 PM, ofri raviv wrote:

> Hi,
> I have a question about pluggable apps design:  many times, you'd  
> like a new app to add some fields to the basic models you already  
> have. for example, if I have a users app, and i want to add karma  
> (everything good you do on the site gives you good karma points,  
> when you post, when your posts are voted up, etc). it doesn't really  
> matter how the karma app works, in the end, it has to add a karma  
> field to the user model that is already defined in another app.
> the solution seems to be, add another model, UserKarma, that has
> user = models.OneToOneField(User, primary_key=True,  
> related_name='karma')
> and then we can use user.karma.foo to access the fields that karma  
> app added.
> is that a good solution? how is it performance-wise compared to just  
> adding the fields to User?
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