On Tue, Apr 19, 2011 at 7:28 PM, Jacob Kaplan-Moss <ja...@jacobian.org>wrote:
> 2011/4/19 Juan Pablo Romero Méndez <jpablo.rom...@gmail.com>: > > Is it possible to create unidirectional relations within django's orm? > > > > What I mean is a situation where a parent has a children_set of > > references to children, but the children don't have any reference to > > the father. > > See the documentation for ForeignKey.related_name: > > http://docs.djangoproject.com/en/dev/ref/models/fields/#django.db.models.ForeignKey.related_name > . > In particular, note the part about what `related_name="+"` does. > Jacob, That sounds like it would create exactly the opposite situation from what is wanted. class Parent(models.Model): pass class Child(models.Model): parent = models.ForeignKey(Parent, related_name='+') would give a child a reference to their parent, without the parent having a child_set attribute. I think Mike has the right idea; using a separate 1:many table to avoid explicit fields on the child model, but, of course, SQL being what it is, it is still possible to construct a query that joins the tables and reconstructs the link from child to parent. -- Regards, Ian Clelland <clell...@gmail.com> -- 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 django-users+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/django-users?hl=en.
