Display a checkbox list instead of multiple select

Question

I have a model MyModel with a serialized attribute a, describing an array of symbols.

This code works :

<% form_for @my_         


        

Answer 1

I found a solution, using 'multiple' option that I didn't know.

<% MyModel::AS.each do |a_value| %>
  <%= f.check_box(:a, { :multiple => true }, a_value) %>
<% end %>

Result parameters are a little weird, but it should work.

{"my_model" => { "a" => ["0", "a_value1", "0", "a_value2", "0"] }

Edit from @Viren : passing nil at the end of the function like

  <%= f.check_box(:a, { :multiple => true }, a_value, nil) %>

works perfectly.