Paperclip S3下载远程图像

Question

我如何下载远程图像(http协议,url在image_remote_url属性中)并通过Paperclip将其保存为S3的附件？

class Product < ActiveRecord::Base
  require 'open-uri'
  attr_accessor :image_remote_url
  has_attached_file :photo,
    :storage => :s3,
    :s3_credentials => "#{RAILS_ROOT}/config/s3.yml",
    :path => ":class/:id/:style.:extension",
    :bucket => "my_bucket",
    :styles => {
      :icon => "32x32#",
  }

  def fetch_image
    # how should this method look ?
  end

end

"fetch_image"方法应该怎么样？

Answer 1

这是一个页面链接,可以准确地解释您的需求.

http://trevorturk.wordpress.com/2008/12/11/easy-upload-via-url-with-paperclip/

我在自己的网站上成功实现了它.