尝试将类添加到选择标签
<%= f.select(:ptype, options_for_select(TourParticipation::PTYPES, selected: "traveler", disabled: "Role:") , { :class => "widens" } ) %>
结果
<select name="tour_participation[ptype]" id="tour_participation_ptype"></select>
为什么类没有应用于我的选择标签？
【问题讨论】：
标签： ruby ruby-on-rails-4 formbuilder actionview
您忘记了html_options 之前是options 哈希。试试这个：
<%= f.select(:ptype, options_for_select(TourParticipation::PTYPES, selected: "traveler", disabled: "Role:") , {}, { :class => "widens" } ) %>
见定义： http://api.rubyonrails.org/classes/ActionView/Helpers/FormOptionsHelper.html#method-i-select
【讨论】：
<%= f.select(:ptype, options_for_select(TourParticipation::PTYPES, selected: "traveler", disabled: "Role:"), {}, class: "widens") %>