Acts_as_dropdown may be what you want:
http://delynnberry.com/pages/acts_as_dropdown/
Cheers, Max
Use
<%= collection_select 'model_1_name', 'comment', Comment.find(:all), 'id', 'name' %>
and read up here:
http://wiki.rubyonrails.org/rails/pages/HowtoUseFormOptionHelpers
Cheers, Max