On 12/14/06, Russell Keith-Magee <[EMAIL PROTECTED]> wrote: > > > Yes and No. > > Django does have the ability to do a sort of model inheritance, using > OneToOneFields. This establishes a 1-1 relationship between a base > class and a child class. For example: > > class Base(Model): > name = CharField() > > class Article(Model): > base = OneToOneField(MyBase) > length = IntegerField() > > class Author(Model): > base = OneToOneField(MyBase) > age = IntegerField() > > In this case, each Article is required to reference a single Base > instance (likewise for Author). An article instance can ask for > base.name to get the name of the article; author.base.name will give > the name of the author. > > Obviously, this is less than ideal, and there are a few gotchas - for > example, you have to manually create the base class instances. > However, it does work.
OK, thanks. That might be worth a look for the time being. I note though at http://www.djangoproject.com/documentation/model_api/#one-to-one-relationships it says "The semantics of one-to-one relationships will be changing soon, so we don't recommend you use them. If that doesn't scare you away, keep reading." It doesn't scare me that much, since this is a toy app for my own use that I'm happy to keep in a state of constant evolution. But out of interest, does anyone here know what those semantic changes relate to? > > There is a work-in-progress to add a more formal inheritance structure > to Django - search the developers archives and the wiki for a detailed > discussion of the form this inheritance will take. Yes, I see that now at http://code.djangoproject.com/wiki/ModelInheritance. Hadn't done my research properly before asking here. 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 -~----------~----~----~----~------~----~------~--~---
