使用日期字段生成错误更新表单(Symfony，PHP)

Question

我想更新包含日期字段的表单。我可以毫无问题地创建表格，但是我无法编辑它，因为我有错误。因此，这是我的第一类合同：

<?php
 namespace AppBundleForm;
use AppBundleEntityContract;
use SymfonyComponentFormAbstractType;
use SymfonyComponentFormFormBuilderInterface;
use SymfonyComponentOptionsResolverOptionsResolver;
use SymfonyComponentFormExtensionCoreTypeDateType;
use SymfonyComponentFormExtensionCoreTypeTextType;
class ContractType extends AbstractType {
  public function buildForm(FormBuilderInterface $builder, array $options)
 {
    $builder
        ->add('firstDay', DateType::class, array(
        'format' => 'yyyy-MM-dd',
      ))
        ->add('lastDay', DateType::class, array(
        'format' => 'yyyy-MM-dd',
      ))
        ;
}
public function configureOptions(OptionsResolver $resolver)
{
    $resolver->setDefaults(array(
        'data_class' => Contract::class,
    ));
}

这是我的更新代码(控制器部分(：

public function updateAction($id, Request $request) {
$encoder = new JsonEncoder ();
$normalizer = new GetSetMethodNormalizer();
$callback = function ($dateTime) {
  return $dateTime instanceof DateTime ? $dateTime->format ( 'Y-m-d' ) : '';
};
$normalizer->setCallbacks ( array (
      'firstDay' => $callback
      ) );
$normalizer->setCallbacks ( array (
            'lastDay' => $callback
            ) );

$serializer = new Serializer ( array (
  new AppBundleDateTimeNormalizer(), $normalizer
                ), array (
                  $encoder
                  ) );
$headers = array('Accept' => 'application/json');
$response = UnirestRequest::get('link/contracts/'.$id
,$headers);
 $contract = 
 $serializer->deserialize($response->raw_body,Contract::class, 'json');   // Here when I dump my variable it appears good
$form = $this->createForm(ContractType::class,$contract); // In this line I got my error
$form->handleRequest($request);
if ($form->isSubmitted()) {
   $headers = array('Content-Type' => 'application/json');
   $data = $serializer->serialize($contract, 'json');
  $response = UnirestRequest::put('link/contracts'.$id,
    $headers,$data);
   return $this->redirect ( $this->generateUrl ('contracts_list'));
 }
 return $this->render('AppBundle:Contract:ContractCreate.html.twig', array(
   'form' => $form->createView(),
 ));

}

我遇到的错误：

Unable to transform value for property path "firstDay": Expected a DateTimeInterface. 

当我更改行$ serialize-> delelialize ...使用新合同((起作用，但我需要使用序列化才能使用相同的形式。

Answer 1

尝试使用

中的 DateTimeType类而不是 DateType

$builder
    ->add('firstDay', DateType::class, array(
    'format' => 'yyyy-MM-dd',
  ))