Malcolm Tredinnick wrote:
> On Sat, 2006-07-08 at 17:49 +0000, william wrote:
> > I've been trough the save() as documented here:
> > http://code.djangoproject.com/wiki/RemovingTheMagic#Overridingsaveand...

> > But, this  does not work for fields having a ManyToMany relation.
> > If you take the example with "publication" and "article" as described
> > here: http://www.djangoproject.com/documentation/models/many_to_many/

> > If you put the following into the "Article" class:
> >     def save(self):
> >         print "Before",self.publications.all()
> >         super(Article, self).save()
> >         print "after",self.publications.all()

> > You'll see that you'll always see the same result before and after the
> > save.
> > (standard fields are yet working correctly)
> > It seems that the manytomany related data are saved after the complete
> > execution of save().
> > I'm using revision 3275
> > In my case this is annoying.

> Related items (the things being saved into the many-to-many relation)
> are not saved as part of a model's save method, as you have discovered.
> Instead, the Add- and ChangeManipulators save the many-to-many items
> later. In fact, for adding a new item, this is basically required,
> because you need to know the new instance's primary key value before you
> can save a reference to it in the m2m join table -- and that value does
> not necessarily exist before it is saved to the database.

> At the moment, any workaround is going to involve custom manipulators, I
> suspect (although I may be missing something obvious). We might be able
> to come up with something a bit nicer with the upcoming manipulator
> refactoring that is on the table.

> This does come up from time to time when somebody wants to take action
> based on a new relationship being created. So you're not on the fringe
> here by wanting this.

> Sorry, not much encouragement there except to say it's a known problem
> (well, at least, I consider it a "problem"). Maybe somebody smarter than
> me can suggest an easy solution at the moment *shrug*.

> Regards,
> Malcolm