Sorry, please ignore this post: it was supposed to go to the django developers group.
Mike Michael Glassford wrote: > http://code.djangoproject.com/ticket/7539 suggests a way to add On > Delete and On Update support to Django foreign key fields, and includes > a patch that implements the suggestions. At the time I submitted it, > getting Django 1.1 out the door prevented it from being seriously > considered, but now that 1.2 is in the planning stages, how about it? > > The ticket actually suggests several changes: > > 1) Adding an on_delete parameter to ForeignKey definitions and allowing > it to specify CASCADE, SET_NULL, or RESTRICT behavior. > > 2) Modifying Django's built-in behavior, which currently always cascades > deletes, to handle the new SET_NULL and RESTRICT behaviors. Django still > defaults to CASCADE behavior for foreign keys that don't specify an > on_delete parameter. > > 3) Allowing settings files to change the default on delete behavior from > CASCADE to one of the other options for foreign keys that don't specify > an on_delete parameter. > > 4) Allowing settings files to specify that the on_delete behavior should > be handled by the database backend rather than by Django, and changing > the SQL generated by Django to contain appropriate ON DELETE clauses. > > 5) Adding an on_update parameter to ForeignKey definitions. Unlike the > on_delete parameter, the patch doesn't implement built-in emulation of > on_update: on_update clauses are only handled by the database backend. > > > I believe that items 1-3 are in a form that is usable with little > modification, and would like to suggest that at least this much be added > to 1.2. > > Items 4 and 5 would need more work to support more back ends before it > makes sense to include them. > > It might also be nice to have an implementation of item 5 that doesn't > depend on the db backend, although this might require a significant > amount of work. > > > > > --~--~---------~--~----~------------~-------~--~----~ 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 -~----------~----~----~----~------~----~------~--~---
