[Python-il] [pyweb-il:386] Re: a question re pluggable apps

Idan Gazit idan at pixane.com
Tue Sep 1 12:53:41 IDT 2009

Ah, just re-read your question and realized it was slightly different.

For reusable apps, I guess o2o field might be the best solution.  
Subclassing User is not a good idea for a reusable app because you  
might be stepping on the toes of another app.


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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