Download PDF's in rails using PDFKit Gem

Create PDFs using HTML+CSS. Uses wkhtmltopdf on the back-end which renders HTML using Webkit.

You need to install these gems mentioned below :

gem install pdfkit

gem install wkhtmltopdf-binary

Than need to add this line into application.rb :

config.middleware.use PDFKit::Middleware, :print_media_type => true 

Now In View you need to add content or whatever you wants to use :

download_pdf.html.erb

<H1>PDFKit works awesome</H1>
This is you HTML data and going to be convert in pdf

Than in the controller we need add this:

class HomeController < ApplicationController
  def download_pdf  
    html = render_to_string(:action => '../home/download_pdf', :layout => false)
    pdf = PDFKit.new(html)
    send_data(pdf.to_pdf)
  end
end

Than you need to add this link to download pdf or you can change as per your conditions :

<p id="pdf_link">
  <%= link_to "Download (PDF)", home_download_pdf_path(:format => "pdf") %>
</p>