0

假设我有以下形式：

public function buildForm(FormBuilderInterface $builder, array $options)
{
    $builder
        ->add('paste', TextareaType::class, [
            'attr' => array('rows' => '15'),
        ])
        ->add('language', ChoiceType::class, ['choices' => $this->languagesService->getSupportedLanguages()])
        ->add('visibility', ChoiceType::class, ['choices' => $this->visibilityService->getVisibilities()])
        ->add('expiresAt', ChoiceType::class, ['choices' => $this->expiryService->getExpiryTimes(), 'mapped' => false])
        ->add('name', TextType::class, ['required' => false])
        ->add('save', SubmitType::class, ['label' => 'Submit'])
    ;
}

提交表单后，我想向其中添加用户无法完成的另一个字段。让我们打电话给有问题的领域new_field。

到目前为止，我已经尝试使用表单事件：

public function buildForm(FormBuilderInterface $builder, array $options)
{
    $builder
        ->add('paste', TextareaType::class, [
            'attr' => array('rows' => '15'),
        ])
        ->add('language', ChoiceType::class, ['choices' => $this->languagesService->getSupportedLanguages()])
        ->add('visibility', ChoiceType::class, ['choices' => $this->visibilityService->getVisibilities()])
        ->add('expiresAt', ChoiceType::class, ['choices' => $this->expiryService->getExpiryTimes(), 'mapped' => false])
        ->add('name', TextType::class, ['required' => false])
        ->add('save', SubmitType::class, ['label' => 'Submit'])
        ->addEventListener(FormEvents::POST_SUBMIT, function (FormEvent $event) {
            $form = $event->getForm();
            $form->add('new_field')->setData('some_data');
        })
    ;
}

而且我显然遇到了一个异常：You cannot add children to a submitted form，这很公平。

我可以做的另一件事，我非常不想做，因为它看起来很hacky是在控制器中创建一个新实体，设置我从表单获得的数据并保存它。

if ($form->isSubmitted() && $form->isValid()) {
    $formData = $form->getData();
    $entity = new Paste();
    $entity->setCreatedAt($formData->get('createdAt')->getData());
    ...

我还可以为表单创建一些通用父级并对其进行修改，但这似乎更加hacky。

我不反对这里的另一种方法。也许我一开始就看错了。

4

1 回答 1

1

如果你想修改数据，你不应该调用 $form->setData() 因为这是在内部处理的。

->addEventListener(FormEvents::POST_SUBMIT, function (FormEvent $event) {
    $class= $event->getData();
    $class['new_field'] = 'some_data';
    $event->setData($class);
});

但是您可以改用 $event->setData() 。

于 2020-02-06T20:36:31.227 回答