i've created a select button with 3 option

<%= f.label :prioridad %><br/>
<%= f.select :prioridad, options_for_select([['Alta', 1], ['Medio', 2], ['Baja', 3]]) %>

The value gets inserted to the DataBase but when i display it i see the number op the option selected (which is correct).

What i would like to know is how i can change that so on the index the user can see the name and not the value:

def convertidor
  case llamada.prioridad
    when prioridad == '1'
      puts "Alta"
    when prioridad == '2'
      puts "Media"
    else
     puts "Baja"
  end

end

This didn't worked. Regars