在wicked pdf中render_to_string的正确方法是什么?

时间:2013-04-12 13:05:22

标签: ruby-on-rails-3 wicked-pdf

这就是wicked pdf指定的文档:

WickedPdf.new.pdf_from_string(
render_to_string(:pdf => "pdf_file.pdf", :template => 'templates/pdf.html.erb', :layout => 'pdfs/layout_pdf'), 
:footer => {:content => render_to_string({:template => 'templates/pdf_footer.html.erb', :layout => 'pdfs/layout_pdf'})}
)   

我得到的是ActionView :: MissingTemplate 即使我在目录中有pdf.html.erb。我在应用程序控制器中使用gen_pdf方法,在views / application文件夹中使用等效的pdf.html.erb。我错过了什么。

3 个答案:

答案 0 :(得分:7)

请勿使用template

我遇到了和你一样的问题。当您在Controller操作中执行此操作时,您必须以完全不同的方式呈现PDF,而不是使用Mailer或其他内容。

首先,使用template无法正常工作。还有其他一些细微差别,但这里是我可以构建的实现:

<强> notification_mailer.rb

def export

  header_html = render_to_string( partial: 'exports/header.pdf.erb', 
                                  locals:  { report_title: 'Emissions Export' } )

  body_html   = render_to_string( partial: "exports/show.pdf.erb" )

  footer_html = render_to_string( partial: 'exports/footer.pdf.erb' )

  @pdf = WickedPdf.new.pdf_from_string( body_html,
                                        orientation: 'Landscape',
                                        margin: { bottom: 20, top: 30 },
                                        header: { content: header_html },
                                        footer: { content: footer_html } )

  # Attach to email as attachment.
  attachments["Export.pdf"] = @pdf

  # Send email. Attachment assigned above will automatically be included.
  mail( { subject: 'Export PDF', to: 'elon@musk.com' } )

end

答案 1 :(得分:2)

如果您正在使用wicked_pdf并尝试在控制器之外生成pdf(即在cron作业中),您可以这样做(raild 4.1 +):

tmp

并调用此方法:

# app/renderers/pdf_renderer.rb

class PdfRenderer < ActionController::Metal
  include ActionView::ViewPaths
  include AbstractController::Rendering
  include AbstractController::Helpers
  include ActionController::Helpers
  include ActionView::Rendering
  include ActionView::Layouts
  include ActionController::Rendering
  include ActionController::Renderers
  include ActionController::Renderers::All

  append_view_path "app/views"

  View = Struct.new(:layout, :template, :locals)

  def render_pdf(view)
    wicked = WickedPdf.new
    pdf_string = render_to_string(template: view.template, layout: view.layout, locals: view.locals)
    # Make a PDF in memory
    pdf_file = wicked.pdf_from_string(pdf_string, pdf: "pdf_name",
                                      page_size: 'A4',
                                      wkhtmltopdf: ENV['WKHTMLTOPDF_EXECUTABLE_PATH'],
                                      margin: { top: '0.5in', bottom: '1in', left: '0.5in', right: '0.5in'}
    )

    # Write it to tempfile
    tempfile = Tempfile.new(['document', '.pdf'], Rails.root.join('tmp'))
    tempfile.binmode
    tempfile.write pdf_file
    tempfile.close
    tempfile
  end
end

现在您可以使用 renderer = PdfRenderer.new pdf_view = PdfRenderer::View.new.tap do |v| v.template = "postal/#{template_file}.pdf.erb" v.layout = 'layouts/layout.pdf.erb' v.locals = {:user=> @user, :other_stuff => @details} end temp_pdf = renderer.render_pdf pdf_view 对此文件执行任何操作(即发送电子邮件)

您可以在此处详细了解此方式:http://blog.arkency.com/2014/03/pdf-in-rails-without-controllers/

答案 2 :(得分:1)

您可以在邮件中找到类似的内容:

class ReportMailer < ActionMailer::Base

  default :from => DEFAULT_FROM

  def report_pdf(user, bookings)
    @bookings = booking
    @user = user
    mail(:subject => 'Overtime', :to => user.email) do |format|
      format.text # renders overtime_pdf.text.erb for body of email
      format.pdf do
        attachments['monthly_report.pdf'] = WickedPdf.new.pdf_from_string(
            render_to_string(:pdf => 'monthly_report', :template =>
                'hospital_bookings/index.pdf.erb', :layouts => 'pdf.html')
        )
      end
    end
  end
end 

希望这会有所帮助。此外,如果您需要进一步的帮助,最好发布一些代码,以便其他人可以更好地了解您所做的事情以及您希望实现的目标。