Prawn pdf附件在电子邮件中

Question

在我的Rails应用程序中,我正在尝试将发票附加到电子邮件中:

def invoice(invoice)
  attachment :content_disposition => "attachment",
             :body => InvoicePdf.new(invoice),
             :content_type => "application/pdf",
             :filename => 'invoice.pdf'

  mail(:to => @user.email, :subject => "Your Invoice")
end

该InvoicePdf是虾PDF文档:

class InvoicePdf < Prawn::Document
  def initialize(order, view)
    draw_pdf
  end

  def draw_pdf
    # pdf stuff
  end
end

我在电子邮件中没有附件.我究竟做错了什么？任何提示都会受到欢迎和赞赏.

编辑:我使用的Rails版本是3.0.x.

Answer 1

看一下Action Mailer Guide.您需要调用附件方法来添加附件.

试试这个:

attachments['attachment_filename'] = InvoicePdf.new(invoice)

这假设调用InvoicePdf.new(invoice)生成一个文件并返回表示该文件的IO对象.我还注意到你的InvoicePdf类初始化程序需要两个参数,但是你只传递一个.

更新: 另请注意,Action Mailer将获取文件名并计算mime类型,设置Content-Type,Content-Disposition,Content-Transfer-Encoding和base64编码附件的所有内容,因此手动设置isn除非你想覆盖默认值,否则是必要的.

根据您的pdf生成方法,这可能会更好:

invoice = InvoicePdf.new(invoice)
attachments["invoice.pdf"] = { :mime_type => 'application/pdf', :content => invoice.render }
mail(:to => @user.email, :subject => "Your Invoice")