AJAX file uploads in Rails using attachment_fu and responds_to_parent 1

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转自：https://github.com/markcatley/responds_to_parent

说明：rails中模拟ajax方式上传文件

插件下载地址：ruby script/plugin install http://responds-to-parent.googlecode.com/svn/trunk/

Adds responds_to_parent to your controller to respond to the parentdocument of your page. Make Ajaxy file uploads by posting the form to ahidden iframe, and respond with RJS to the parent window.

Example

Controller:

class Test < ActionController::Base  def main  end  def form_action    # Do stuff with params[:uploaded_file]    responds_to_parent do      render :update do |page|        page << "alert($('stuff').innerHTML)"      end    end  endend

main.rhtml:

<html>  <body>    <div id="stuff">Here is some stuff</div>    <form target="frame" action="form_action">      <input type="file" name="uploaded_file"/>      <input type="submit"/>    </form>    <iframe id='frame' name="frame"></iframe>  </body></html>

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