On Tue, 2009-04-07 at 18:29 -0700, Thierry wrote:
> I'll be referring to the example in the Django documentation here. I
> will extend on the "books" application in the "mysite" project by
> creating a new app called "music" so that the structure looks like the
> following:
>
> mysite/
> books/
> models.py - Contains Publisher, Author, Book
> music/
> models.py - Contains Artist, Album
>
> Let's also assume that the Publisher model from books also publish
> music. How can I can refer to Publisher from music/models.py? Is
> there a place under mysite where I can have a common models.py used by
> all my apps? For example, is mysite/models.py a viable option?
Django models are, for the most part, simply Python classes. So if you
want to refer to a model (class) from somewhere, else, simply import it
and use it.
Thus, in music/models.py:
from books import models as book_models
...
# Refer to Publisher like this
book_models.Publisher
You could even directly import Publisher into the namespace (from
books.models import Publisher). My preference is for the PEP 8 style of
importing the module (helps avoid circular import problems, too), but
that's clearly not everybody's way.
Regards,
Malcolm
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