ActionMailer中的Rails 3 Render Prawn pdf [英] Rails 3 Render Prawn pdf in ActionMailer

问题描述

如何在ActionMailer中将虾pdf呈现为附件？我使用了delay_job，但不明白如何在行动邮件中（而非控制器中）呈现pdf文件。我应该使用哪种格式？

How to render prawn pdf as attachment in ActionMailer? I use delayed_job and don't understand, how could I render pdf-file in action mailer (not in controller). What format should I use?

推荐答案

您只需要告诉Prawn将PDF呈现为字符串，然后将其添加为电子邮件附件。有关附件的详细信息，请参见 ActionMailer文档。

You just need to tell Prawn to render the PDF to a string, and then add that as an attachment to the email. See the ActionMailer docs for details on attachments.

这是一个例子：

class ReportPdf
  def initialize(report)
    @report = report
  end

  def render
    doc = Prawn::Document.new

    # Draw some stuff...
    doc.draw_text @report.title, :at => [100, 100], :size => 32

    # Return the PDF, rendered to a string
    doc.render
  end
end

class MyPdfMailer < ActionMailer::Base
  def report(report_id, recipient_email)
    report = Report.find(report_id)

    report_pdf_view = ReportPdf.new(report)

    report_pdf_content = report_pdf_view.render()

    attachments['report.pdf'] = {
      mime_type: 'application/pdf',
      content: report_pdf_content
    }
    mail(:to => recipient_email, :subject => "Your report is attached")
  end
end

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