I wonder whether you have to save a record to the database BEFORE you can update a ManyToMany field?
I came across a post by Karen Tracey that seems to suggest this. The problem is that I am unable to do so because the ManyToManyField in my model has no default value and this triggers an error when I try to save without adding a value to it. And when I try to add a value django says that the "instance needs a primary key value before a many- to-many relationship can be used." Thus, it's kind of a trap, isn't it? I am working on an app with similar models to the document "Making queries" at http://docs.djangoproject.com/en/1.0/topics/db/queries only that I change the authors-field with a users field pointing to the auth.model User. class Entry(models.Model): [..] users = models.ManyToManyField(User) (KT's post below) Please advise. Robert [The] way to update a ManyToMany field is to call the add() method on the many-to-many field, not to assign anything to it. So I'd think what you need to do is: if f.is_valid(): newgroup = f.save(commit=False) newgroup.group_owner = request.user newgroup.save() newgroup.group_members.add(request.user) newgroup.group_admins.add(request.user) return HttpResponseRedirect("/group/list/") -- You received this message because you are subscribed to the Google Groups "Django users" group. To post to this group, send email to django-us...@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.
