Patching render to disable the layout if PJAX request

application_controller.rb

class ApplicationController < ActionController::Base
  ...
  #We don't want to render the layout if PJAX is working
  def render(options = nil, extra_options = {}, &block)
    if request.headers['X-PJAX'] == 'true'
      options = {} if options.nil?
      options[:layout] = false 
    end
    super(options, extra_options, &block)
  end
  ...
end