Вопрос Простые примеры реализации Ajax на Rails посоветуйте

rails new ajax_my_test
cd ajax_my_test
rails generate scaffold Staff name:string profession:string
rake db:migrate
rails s

//= require jquery

//= require jquery
//= require rails-ujs
//= require turbolinks
//= require_tree .

# Use jquery as the JavaScript library
gem 'jquery-rails'

app/views/staffs

$('.delete_staff').bind('ajax:success', function(){
  $(this).closest('tr').fadeOut();
});

app/view/staffs/index.html.erb

<td><%= link_to 'Destroy', staff, method: :delete, data: { confirm: 'Are you sure?' } %></td>

<td><%= link_to 'Destroy', staff, method: :delete, data: { confirm: 'Are you sure?' },
        :remote => true, :class => 'delete_staff'%></td>

def destroy
    @staff.destroy
    respond_to do |format|
      format.html { redirect_to staffs_url, notice: 'Staff was successfully destroyed.' }
      format.json { head :no_content }
    end
  end

def destroy
    @staff.destroy
    respond_to do |format|
      format.html { redirect_to staffs_url, notice: 'Staff was successfully destroyed.' }
      format.json { head :no_content }
      format.js   { render :layout => false}
    end
  end

<button id="btnSubmit" type="submit" class="btn btn-default">Go ahead</button>

<script type="text/javascript" language="javascript">
 	function call() {
 	$('#btnSubmit').prop('disabled', true);
 	  var msg   = $('#form_name').serialize();
        $.ajax({
          type: 'GET',
          url: '/index.html',
          data: msg,
          success: function(data) {
          $('#btnSubmit').prop('disabled', false),
            alert('ГОтово');
          },
          error:  function(xhr, str){
          $('#btnSubmit').prop('disabled', false),
	      alert('Что-то пошло не так: ' + xhr.responseCode);
          }
        });
    }
</script>

<button onclick="style.display='none'">Go ahead</button>