Ruby-on-rails 使用带有acts_as_taggable_on 的form_for 多选字段

Using form_for multi-select fields with acts_as_taggable_on

提问by kcurtin

I can't figure out the right code for using a predetermined set of options for a multi-select field. I want to have a list of skills in a drop down that users can select from. Here is the code I am using, it works fine as a single select field, but not as a multi-select:

我无法找出为多选字段使用一组预定选项的正确代码。我想在下拉列表中有一个用户可以从中选择的技能列表。这是我正在使用的代码，它作为单个选择字段可以正常工作，但不能作为多选：

 <%= form_for(@user, :html => { :class => "form-stacked" } )  do |f| %>
 ...
   <div class="clearfix"><%= f.select :skill_list, options_for_select(["Asst", "dir",      "pres"]), 
     {
    :multiple => true, 
    :class => "chzn-select", 
    :style => "width:450px;" } %></div>
 ...
 <% end %>

Anyone have any suggestions? Eventually, I will want to store all of the options for the multi-select form elsewhere because there will be a bunch, but this is the first challenge I can't figure out..

有人有什么建议吗？最终，我想在别处存储多选表单的所有选项，因为会有一堆，但这是我无法弄清楚的第一个挑战..

Thanks.

谢谢。

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EDIT

编辑

I have also tried:

我也试过：

:html => { :multiple => true, :class => "chzn-select", :style => "width:450px;" } and it doesnt work either

回答by Batkins

There needs to be two pairs of brackets, one for the options, and one for html_options, like so:

需要有两对括号，一对用于options，一对用于html_options，如下所示：

<%= f.select :skills_list, options_for_select(["Asst", "dir", "pres"]), {}, {:multiple => true, :class => "chzn-select", :style => "width:450px;" } %>

See the docs for the select helper.

请参阅 select helper 的文档。