我可以用initialize方法将由prawn生成的pdf文件保存到profect文件夹吗?

我有一个 OrderPdf 继承自的类 Prawn::Document 课程内容如下:

class OrderPdf < Prawn::Document
  include ActionView::Helpers::NumberHelper
  include ActionView::Helpers::TagHelper

  def initialize(order)
    super(top_margin: 50, size: 12)
    @order = order
    logo
    # Other methods that generate pdf's content
    footer
  end

  def logo
    # Some stuff here
  end

  def footer
    #Some stuff here
  end
end

OrderPdf.new(@order) . 生成了Pdf文件,但我需要的是将其保存到名为的项目中,如下所示: "#{Rails.root}/public/uploads/orders/order-#{order.order_number}.pdf" 我知道,我可以做到: Prawn::Document.generate("#{Rails.root}/public/uploads/orders/order-#{order.order_number}.pdf") ,但是我可以用现有的代码做一些类似的事情吗?谢谢你。