gistfile1.coffee

$ ->
  $module_type_select = $('@module_type_select')
  $module_type_select.trigger 'change'
  $module_type_select.on 'change', ->
    $flight_fields = $('.wf-info__depart, .wf-info__return')
    $show_hotels_checkbox = $('@show_hotels_checkbox')
    if this.value == 'hotel'
      $flight_fields.hide()
      $show_hotels_checkbox.prop('checked', true)
    else
      $flight_fields.show()