Multiselect control in Rails with a Many to Many relationship | Cory Foy

Multiselect control in Rails with a Many to Many relationship | Cory Foy

이 예제말고 다른 예로는 아래와 같은 방법도 있다.

http://www.gilluminate.com/2007/02/15/best-way-to-do-multiple-select-combo-boxes-in-rails/