Ruby on Rails

I dont think it will helpful, below is my code,

      content = File.read "#{Rails.root}/app/to/mytemplate.html.erb"
      template = ERB.new(content)
      html_content = template.result(binding)
      pdf= WickedPdf.new.pdf_from_string(html_content)
      save_path = "#{Rails.root}/public/test_pdf.pdf"
      File.open(save_path, 'wb') do |file|
       file << pdf
      end
      @photo = Photo.new
      @photo.avatar = File.open("#{Rails.root}/public/message#{@message.id}.pdf")
      @photo.save