[英]Keep good data in form after failed validation on symfony form collection
[英]Modifying Symfony form data after failed validation
我有一個帶有自定義驗證程序的Symfony表單字段。 如果用戶提交表單,但驗證失敗,我想更正該值並將其顯示給用戶以供查看。
驗證后如何修改提交的表單字段?
PRE_SUBMIT
不適合,因為它在驗證之前執行:
$builder->addEventListener(FormEvents::PRE_SUBMIT, function (FormEvent $event) use ($options) {
$data = $event->getData();
$data['myField'] = 'Modified!';
$event->setData($data);
});
我也嘗試在控制器中進行修改,但得到一個“ You cannot change the data of a submitted form
錯誤You cannot change the data of a submitted form
。
if ($form->isSubmitted() && !$form->isValid()) {
$form->get('myField')->setData('Modified!');
}
有什么辦法嗎?
這樣怎么樣
$myValue = '';
if ($form->isSubmitted() && !$form->isValid()) {
$myValue = 'Modified!';
}
return $this->render('my_template.html.twig', [
'form' => $form->createView(),
'myValue' => $myValue,
]);
在my_template.html.twig
,
{{ form_widget(form.myField, {'value' : myValue}) }}
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