Rails 4.2 WickedPDF renderer class

pdf_renderer.rb

# see https://github.com/rails/rails/issues/14125#issuecomment-44547905
# for clues about the Rails 4.1 specific changes

class PdfRenderer < AbstractController::Base
  include ActionController::Helpers
  include AbstractController::Rendering
  include ActionView::Layouts

  append_view_path "#{Rails.root}/app/views"

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

  def render_pdf(view)
    html = render_to_string(
      layout: view.layout,
      action: view.action,
      locals: view.locals
    )
    
    WickedPdf.new.pdf_from_string(html, :margin => {top: 0, bottom: 0, left: 0, right: 0}, :disable_smart_shrinking => true)
  end
end