在cakephp3的视图中列出每个类别的文章

use App\Model\Table\ArticlesTable;
use App\Model\Table\CategoriesTable;

class ArticlesController extends AppController
{
    public function index()
    {
        $categoriesTable = new CategoriesTable();
        $categories = $categoriesTable->find('all')->contain(['Articles']);

        $this->set('categories', $categories);
    }
}

<?php foreach ($categories as $category): ?>
    <h2><?= h($category->name) ?></h2>
    <ul>
        <?php foreach ($category->articles as $article): ?>
            <li><?= h($article->title) ?></li>
        <?php endforeach; ?>
    </ul>
<?php endforeach; ?>