Since my_book.auther_set.all() returns a QS, can't you just say something like ...all().filter(author__isalive=True) or something like that? I've never tried, but I thought that django would figure it out?
J On Aug 25, 12:11 am, MrJogo <[EMAIL PROTECTED]> wrote: > How do I create a custom manager for many-to-many traversal? An > example will illustrate what I want to do better. Suppose I have the > following models.py: > > class Book(models.Model): > title = models.CharField(max_length=100) > > class Author(models.Model): > books = models.ForeignKey(Book) > name = models.CharField(max_length=100) > is_alive = models.BooleanField() > > This is a many-to-many relationship: a book can have multiple authors > and an author can have written multiple books. > > If I have a book object my_book, and I want to get all the authors, I > do my_book.author_set.all(). How can I set up a custom manager to only > get living authors of that book, so I could do something like > my_book.livingauthor_set.all()? > > Thanks --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Django users" group. To post to this group, send email to django-users@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/django-users?hl=en -~----------~----~----~----~------~----~------~--~---
