// View
<script src="https://js.pusher.com/2.2/pusher.min.js"></script>
<script>
$(document).on('page:fetch', function() {
pusher.disconnect();
});
</script>
<script>
  var pusher = new Pusher('<%= Pusher.key %>', {
    encrypted: true,
    cluster: 'eu'
  });
  var channel = pusher.subscribe('test_channel');
  channel.bind('greet', function(data) {
  $("#print").load(location.href + " #print");
});
</script>

//controller
  def update
   @worker = Worker.find(params[:id])
     if @worker.update(worker_params)
       redirect_to main_path
       Pusher['test_channel'].trigger('greet', {  :greeting => "#present" })
    else
       render 'edit'
   end
  end