Ruby on Rails — multiple selection in f.select

Question

I have the following select box in my form:

Related Type:   <%= f.select(:TYPE, [[\'Type A\', \'Type A\'],
                                  [\'T         


        

Answer 1

In case of collection, try

    <%= f.select(:TYPE, Categories.collect {|p| [ p.name, p.id ] }, 
                                           { :prompt => "Please select"}, 
                                           { :multiple => true, :size => 5 }) %>