ruby-on-rails – Rails亚马逊s3 jquery文件上传：上传进度条不

酒吧出现了,但它只是一个空的灰色条(尽管图片完全上传).这背后有原因吗？还有另一种方法可以做到这一点(这样它可以工作)？

照片/ new.html.erb

<div class="clearfix">

<div class="uploadreminder">
    Upload multiple pictures at once or drag them directly to the browser!
</div>
<%= form_for([@user,@album,@photo],:html => { :multipart => true }) do |f| %>

<%= f.file_field :avatar,multiple: true,name: "photo[avatar]" %>

<% end %>

<div class="finisheduploading">
    <%= link_to "Back to album",user_album_path(@user,@album) %>
</div>



<div id="pics">
    <%= render :partial => "photo",:collection => @photos %>
</div>


    #this is the part that is supposed to make the progress bar
<script id="template-upload" type="text/x-tmpl">
<div class="upload">
  {%=o.name%}
  <div class="progress"><div class="bar" style="width: 0%"></div></div>
</div>
</script>
</div>

的application.js

//= require jquery
//= require jquery_ujs
//= require fancybox
//= require 'js/bootstrap.js'
//= require jquery-fileupload/basic
//= require jquery-fileupload/vendor/tmpl
//= require_tree .

$(document).ready(function() {

  $("a.fancybox").fancybox();
  $("a.fancybox").attr('rel','gallery').fancybox();


});

photos.js.coffee

jQuery ->
$('#new_photo').fileupload
  dataType: "script"
  add: (e,data) ->
    types = /(.|/)(gif|jpe?g|png)$/i
    file = data.files[0]
    if types.test(file.type) || types.test(file.name)
      data.context = $(tmpl("template-upload",file))
      $('#new_photo').append(data.context)
      data.submit()
    else
      alert("#{file.name} is not a gif,jpeg,or png image file")
  progress: (e,data) ->
    if data.context
      progress = parseInt(data.loaded / data.total * 100,10)
      data.context.find('.bar').css('width',progress + '%')

我的完整代码在这里：https://github.com/EdmundMai/pholderbeta/blob/master/app/views/photos/new.html.erb