I've released a new plugin for managing model association relationships.
If you are producing a form for a rails model object and it has a
"has_many" or "has_and_belongs_to_many" relationship of some other
simple objects (which can be identified by name), then this plugin
might be for you. It uses a select box to add items to the list, and
delete buttons to remove them. It's all client side, using hidden
fields, until you submit the form and it saves the relationships in
For more detail, and a demo, see:
This has also been added to:
This was extracted from one of my projects, hopefully it's of use to someone.