在Rails中，如何使用jquery-file-upload和CarrierWave处理多个多态文件上传？

gem \'carrier wave\'

/lib/flash_session_cookie_middleware.rb

require \'rack/utils\'

class FlashSessionCookieMiddleware
  def initialize(app, session_key = \'_session_id\')
    @app = app
    @session_key = session_key
  end

  def call(env)
    if env[\'HTTP_USER_AGENT\'] =~ /^(Adobe|Shockwave) Flash/
      req = Rack::Request.new(env)
      env[\'HTTP_COOKIE\'] = [ @session_key,
                             req.params[@session_key] ].join(\'=\').freeze unless req.params[@session_key].nil?
      env[\'HTTP_ACCEPT\'] = \"#{req.params[\'_http_accept\']}\".freeze unless req.params[\'_http_accept\'].nil?
    end

    @app.call(env)
  end
end

Rails.application.config.middleware.insert_before(
  ActionDispatch::Session::CookieStore,
  FlashSessionCookieMiddleware,
  Rails.application.config.session_options[:key]
)

jquery.uploadify.v2.1.4.min.js

swfobject.js

/app/assets/javascripts

/public/javascripts

uploadify.swf

cancel.png

/app/assets/images/

/public/images

uploadify.css

/app/assets/stylesheets/

/public/stylesheets

//= require swfobject
//= require jquery.uploadify

<input id=\"uploadify\" name=\"uploadify\" type=\"file\" />

$(document).ready(function() {
  <% key = Rails.application.config.session_options[:key] %>
  var uploadify_script_data = {};
  var csrf_param = $(\'meta[name=csrf-param]\').attr(\'content\');
  var csrf_token = $(\'meta[name=csrf-token]\').attr(\'content\');
  uploadify_script_data[csrf_param] = encodeURI(encodeURIComponent(csrf_token));
  uploadify_script_data[\'<%= key %>\'] = \'<%= cookies[key] %>\';

  $(\'#uploadify\').uploadify({
    uploader        : \'/assets/uploadify.swf\',
    script          : \'/photos\',
    cancelImg       : \'/images/cancel.png\',
    auto            : true,
    multi           : true,
    removeCompleted : true,
    scriptData      : uploadify_script_data,
    onComplete      : function(event, ID, fileObj, doc, data) {
    }
  });
});

def create
  @photo = Photo.new(:image => params[:Filedata])
  @photo.save
end