Use custom id for check_box_tag in Rails

Question

How do you set a custom id when using a check_box_tag helper in rails?

I have a loop which creates a bunch of checkboxes based on a collection:

- subject         


        

Answer 1

I used this in my application to create checkbox tags from collection and submit an array of them:

<% @cursos.each do |c| %>
  
    <%= check_box_tag "vaga[curso_ids][]",
      c.id, (checked = true if form.object.curso_ids.include?(c.id)) %>
    <%= label_tag "vaga[curso_ids][][#{c.id}]", c.nome %>
  
<% end %>

So in params, I have an array "curso_ids"=>["1", "3", "5"] instead of a string "curso_ids"=>"5". If you want to return a single value, use vaga[curso_id], otherwise use vaga[curso_ids][] to return an array.