たった３ステップで新規ページを追加する方法 (user_dataなし)

<?php
/*
* This file is part of EC-CUBE
*
* Copyright(c) EC-CUBE CO.,LTD. All Rights Reserved.
*
* http://www.ec-cube.co.jp/
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/

namespace Customize\Controller;

use Eccube\Controller\AbstractController;
use Sensio\Bundle\FrameworkExtraBundle\Configuration\Template;
use Symfony\Component\Routing\Annotation\Route;

class NewPageController extends AbstractController
{
 /**
 * @Route("/new_page", name="new_page_route_name", methods={"GET"})
 * @Template("new_page.twig")
 */
 public function index()
 {
 return [];
 }

}

{#
This file is part of EC-CUBE

Copyright(c) EC-CUBE CO.,LTD. All Rights Reserved.

http://www.ec-cube.co.jp/

For the full copyright and license information, please view the LICENSE
file that was distributed with this source code.
#}
{% extends 'default_frame.twig' %}

{% set body_class = 'front_page' %}

{% block stylesheet %}

{% endblock %}

{% block javascript %}

{% endblock javascript %}

{% block main %}
test
{% endblock %}

INSERT INTO dtb_page (master_page_id, page_name, url, file_name, edit_type, create_date, update_date, meta_robots, discriminator_type)
VALUES(null, '追加する新規ページ', 'new_page_route_name', 'new_page', 1, NOW(), NOW(), '', 'page');

INSERT INTO dtb_page_layout (page_id, layout_id, sort_no, discriminator_type)
VALUES(
 (SELECT id FROM dtb_page WHERE url = 'new_page_route_name'),
 2, /* 下層ページレイアウト */
 1, /* sort_noは特に重要な用途はないので最大値でなく1でもよいはず */
 'pagelayout'
);