Nested model forms
Rails desperately needs a unified solution for the display and consumption of nested model forms (complex forms). The ideal solution would included both model-level support for mass assignment of nested models as well as view-level helpers for the creation of forms to allow for the editing of such models.
This was a feature that tried to make it into an earlier release of Rails (see: http://ryandaigle.com/articles/2008/7/19/what-s-new-in-edge-rails-nested-models) but was later pulled (see: http://groups.google.com/group/rubyonrails-core/browse_thread/thread/3c61e00916c365e5?pli=1) so it could bake a little longer. It seems to be time to turn the oven up on this idea, it's gone unsolved for too long despite a clear need.
This feature was already started and is planned to be available in Rails 2.3
Shouldn't this get marked as in so that the votes get returned to folks?
Awesome news! I'm stoked.
This is already in the 2.3 milestone, and is actively being worked on. You can track it at http://rails.lighthouseapp.com/projects/8994/tickets/1202-add-attributes-writer-method-for-an-association