如何根据数据库行用N个表单填充Smyfony CollectionType

// 在表单类中定义CollectionType字段
public function buildForm(FormBuilderInterface $builder, array $options)
{
    $builder
        // 其他字段...
        ->add('childForms', CollectionType::class, [
            'entry_type' => ChildFormType::class,
            'allow_add' => true,
            'allow_delete' => true,
            'prototype' => true,
        ])
        // 其他字段...
    ;
}

// 在控制器中获取数据并传递给表单类
public function createForm(Request $request)
{
    $data = $this->getDataFromDatabase(); // 从数据库获取数据
    $form = $this->createForm(ParentFormType::class, $data);

    $form->handleRequest($request);

    if ($form->isSubmitted() && $form->isValid()) {
        // 处理表单数据并保存到数据库
        $formData = $form->getData();
        $this->saveDataToDatabase($formData);

        return $this->redirectToRoute('success_route');
    }

    return $this->render('form.html.twig', [
        'form' => $form->createView(),
    ]);
}

// 在Twig模板中循环迭代CollectionType字段，并渲染子表单
{% block content %}
    {{ form_start(form) }}
    {{ form_row(form.childForms) }}
    {{ form_end(form) }}
{% endblock %}