Question

src / AppBundle / Entity / ShoppingCart / Order.php 解析了 OrderInterface ，它可以与Doctrine一起使用。

如果尝试在0格式中使用它，那么我收到错误：

'class' => OrderInterface::class

当然可以直接定义Class "ShoppingCartBundle\Entity\OrderInterface" seems not to be a managed Doctrine entity. Did you forget to map it?"，但在这种情况下会失去解决目标实体配置的优势。

的src / ComplaintsBundle /窗体/类型/ ComplaintType.php

'class' => Order::class

应用程序/配置/ config.yml

...
public function buildForm(FormBuilderInterface $builder, array $options)
{
   $builder
        ->add('order', EntityType::class,
            array(
                'required'    => true,
                'class'       => OrderInterface::class,
                'property'    => 'id',
            )
        );
}
...

Answer 1

在您的表单中将doctrine.dbal.connection.event_manager注明为evm，将EntityManager注入em。

之后你可以尝试这样的事情：

private function resolveClass(string $className): string
{
    $eventArgs = new OnClassMetadataNotFoundEventArgs($className, $this->em);
    $this->evm->dispatchEvent(Events::onClassMetadataNotFound, $eventArgs);

    $metadata = $eventArgs->getFoundMetadata();
    if ($metadata === null) {
        throw new InvalidArgumentException("Failed to resolve class $className");
    }

    return $metadata->getName();
}

public function buildForm(FormBuilderInterface $builder, array $options)
{
   $builder
        ->add('order', EntityType::class,
            array(
                'required'    => true,
                'class'       => $this->resolveClass(OrderInterface::class),
                'property'    => 'id',
            )
        );
}

我没有真正测试过，只看了how Doctrine does this。

Answer 2

在元数据加载期间解析实际类名。要通过接口元数据加载来获取真正的类名，应该触发。这可以通过下一个代码来实现

$entityManager = $managerRegistry->getManager();
$metadata = $entityManager->getClassMetadata(OrderInterface::class);
$realClassName = $metadata->getName();

如何在Symfony2表单类型中使用已解析的目标实体？

2 个答案: