has_and_belongs_to_many in Ruby on Rails

http://wiki.rubyonrails.org/rails/pages/has_and_belongs_to_many

habtm いろいろはまりみち@_@

Jeff Hicks
http://jrhicks.net/96

Encytemedia: Storing additional data on join tables with Rails
http://encytemedia.com/blog/articles/2005/06/15/storing-additional-data-on-join-tables-with-rails