Rails collection_select + bootstrap下拉列表

Question

<div class="dropdown">
...
 <%= ff.collection_select :vendor_id, @vendors, :id, :vendor, :include_blank => true, class: "dropdown-menu" %> 
...
</div>

我有一个表单，然后我使用如上所示的fields_for来收集输入。但我无法看到here所示的程式化引导下拉列表。我应该做些什么改变才能看到bootstrap风格化下拉列表？

Answer 1

这

<%= ff.collection_select :vendor_id, @vendors, :id, :vendor, :include_blank => true, class: "dropdown-menu" %>

到

<%= ff.collection_select :vendor_id, @vendors, :id, :vendor, {:include_blank => true}, {class: "dropdown-menu"} %>

collection_select（object，method，collection，value_method，text_method，options = {}，html_options = {}）