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Wicked_PDF renders a string from a template in a background process

I have a “tech” controller that has an action for sending email and invoices, from there we use Delayed :: Job.enqueue to drag the actual email action into the background process, which will be processed using the working dyno on Heroku .

Everything is working fine.

The problem I discovered is that my generated PDF invoice lives in the Heroku Web Dyno file system, and Worker has no idea where it is.

I will download the PDF during the generation process, it takes too much time.

So, I need to create an account on the working dynamics when it is sent to perform the action of the mail program to send a message.

I found this blog with some detailed instructions on creating a pdf file from a line: http://viget.com/extend/how-to-create-pdfs-in-rails

But it doesn't work for me at all, here is the code:

  html = render_to_string(:action =>":show", :layout => "invoice.html")
  @pdf = WickedPdf.new.pdf_from_string(html)

And the error:

"last_error"=>"undefined method `response_body=' for #<MailSenderJob:0x007fdf7e70a638>

I know this is from the docs:

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

And this code never worked for me at all.

What I get over and over again is error_body = error. As if he was not receiving an answer at all.

At the top of my file, I do:

  include ActionController::Rendering

Because it is a module in which the render_to_string method is inside.

Any help at all - pay attention to your answer that I run this code on the Heroku WORKER dynamics, so if there is any dependency that I need to manually enable, which is naturally enabled on the web server, please let me know .

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- , , , .

  html = File.read(Rails.root.join('app','views','technician','invoice.html.erb'))
  html = ERB.new(html).result(binding)
  html = html.gsub!(/\0/,'')  # There is a null byte in the rendered html, so we'll strip it out (this is kind of a hack)

  #  Render the PDF - we're on a worker dyno and have no access to the pdf we rendered already on the web dyno

  @pdf = WickedPdf.new.pdf_from_string(
            html,
            :handlers => [:erb],
            :footer => {
              :center => "Copyright 2014"                   
            },
            :disable_smart_shrinking => true,
          )
@pdf = @pdf.gsub!(/\0/,'')  # Again with the null bytes!
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Partials.

, , , PDF , Controller.

, , - .

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["Emissions Export.pdf"] = @pdf

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

end
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