小编Ben*_*phy的帖子

我试图将两个select2多值选择框添加到我的Rails应用程序中。

顶部的形式可以正常工作，但底部的形式不起作用。

我尝试更改ID和添加新的js代码，但没有成功。我根本缺少什么错吗？

Index.html

# This one works fine
<div class="search_genre">Genre:</div>
<div class="select2-container select2-container-multi populate">
    <select multiple="" name="e9" id="e9" style="width:300px" class="populate select2-offscreen" tabindex="-1" placeholder="Search or Select">
       <optgroup label="Popular">
           <option value="Alt">Rock</option>
           <option value="Ind">Indie</option>
           <option value="Ind">Alternative</option>
           <option value="Ind">Acoustic</option>
       </optgroup>
      </select>
</div>


# This one doesn't show a text input or the optiongroup values
<div class="search_region">Region:</div>
<div class="select2-container select2-container-multi populate">
    <select multiple="" name="e9" id="e9" style="width:300px" class="populate select2-offscreen" tabindex="-1" placeholder="Search or Select">
       <optgroup label="Local">
           <option value="PDX">Greater Portland</option>
           <option value="OR">Oregon</option>
           <option value="WA">Washington</option>
       </optgroup> …