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我已经对此进行了调查，它可能与我的 javascript 配置有关，但不确定我在这里缺少什么：

意见

 <%= button_to("Delete Collection", @collection, :confirm => "Really delete bundle and all its examples?", :method => :delete) %>

javascripts/application.js

//= require jquery
//= require jquery_ujs
//= require_tree .

布局/application.html.erb

<head>
  <title>Portfolio</title>
  <%= stylesheet_link_tag    "application", :media => "all" %>
  <%= javascript_include_tag "application" %>
  <%= javascript_include_tag :defaults %>
  <%= csrf_meta_tags %>
</head>
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