module FileService class LetterGenerator def initialize(user) @user = user end def process WickedPdf.new.pdf_from_string( ApplicationController.new.render_to_string( template: ‘services/main.pdf.erb’, locals: { user: user} ) margin: { top: 10, bottom: 20 } ) end private attr_reader :user end end main.pdf.erb <meta http-equiv=”content-type” content=”text/html; charset=utf-8″ /> <div class=”letter”> <div class=’header’> <div class=’header-right’> <b>Letter</b> </div> <div class=’logo’> <% if @user.client %> […]