Question

使用Rails 4.似乎无法将class添加到select。我认为required，autofocus等其他属性也不存在：

<%= form.select "availability", options_for_select(1..200), required: 'true', autofocus: 'true', class: 'form-control' %>

输出如下：

<select id="event_availability" name="event[availability]">
  <option value="1">1</option>
  <option value="2">2</option>
  <option value="3">3</option>
  ...
</select>

有什么想法吗？感谢。

Answer 1

试试这个

<%= form.select "availability", options_for_select(1..200), {}, {required: 'true', autofocus: 'true', class: 'form-control'} %>

第三个参数的可能选项是:prompt和:include_blank

Answer 2

这对我有用拉单：

<%= f.select( :user_id,    options_from_collection_for_select(@users, :id, :name, (@user.id.nil?) ? nil : @users.id), { :include_blank => true },  {:class => 'span4'}) %>

Answer 3

这对我来说很好用：

<%= f.select(:"task_day", ["Today", "Tomorrow", "Day After Tomorrow"], { selected: "Today" }, {required: 'true', class: 'form-control'})  %>

无法在Rails 4中的select form helper上添加类

3 个答案: