Sidekiq in iframe

dashboard.html.haml

%iframe#sidekiq_iframe{ src:"/admin/sidekiq" }

iframe.coffee

element = $('#sidekiq_iframe');
refresh_iframe_height = -> element[0].style.height = @contentWindow.document.body.offsetHeight + 50 + 'px';
element.load(refresh_iframe_height)
setInterval(refresh_iframe_height, 1000)
element.attr('src', attrs['src'])

routes.rb

require 'sidekiq/web'
Rails.application.routes.draw do
  namespace :admin do
    authenticate :admin_user, lambda { |current_user| current_user.present? && current_user.admin } do
      mount Sidekiq::Web => '/workers'
    end
  end
end