add onchange attribute to collection_select

rubyonrails-talk
1

Hi, I am creating a dropdown list with the follwoing code which work perfectly

<%= f.collection_select (:building_id, @buildings, :id , :build_title , :prompt => "select") %>

but i want to use ONCHANGE attribute to it how will i do this , please help i am new to RoR

2

Perhaps observe_field method helps you:

http://api.rubyonrails.org/classes/ActionView/Helpers/PrototypeHelper.html#M001654