ruby-on-rails-3 - 在载波中复制图像

Question

我有一种方法可以在 Carrierwave 中复制图像，但Validation failed: Image could not download file在运行时收到错误消息。它会创建一份 Invoice 副本，然后遍历它的关联图像，将它们设置为 remote_image_url 并重新上传它们。

我认为这与图片网址末尾有 AccessKey 信息这一事实有关。任何的想法？

  def self.duplicate_it(invoice)

    new_invoice = invoice.dup
    new_invoice.save

    if invoice.images.any?
      invoice.images.each do |i|
        temp_image = i.image

        new_image = Image.new(:remote_image_url => temp_image.to_s, :order_id => new_invoice.id)
        new_image.save!
      end
    end 

  end

Answer 1

这有效

new_invoice = invoice.dup :include => {:lineitems => :images} do |original, kopy|
  kopy.image = original.image if kopy.is_a?(Image)
end