Forum: Ruby on Rails image attachment in mail with rails3

yes this will send one mail with attachment of image.png. But when i 
open
or download that image, that is empty.?


imageurl =
https://chart.googleapis.com/chart?chs=150x150&cht...
require 'open-uri'
class UserMailer < ActionMailer::Base
  default :from => "mail@example.com"

  def welcome_email(imageurl,mailid)

    attachments['QR.png'] = {:mime_type => 'image/png',
                                     :content => 
open(URI.parse(imageURL))}
    mail(:to => mailid,
    :subject => "Code",
    :body => "Code")
  end
end

Thanks
vishnu