收集操作的额外数据

Question

有人知道如何在集合上添加额外数据吗？\n该文档详细介绍了如何在项目上添加额外数据，这转化为装饰 ItemNormalizer 服务，并且效果非常好。

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但是当涉及到在实体集合上添加一些数据时，我\xe2\x80\x99m 努力寻找要装饰的规范化器。额外的数据可以是任何内容：当前登录的用户、详细的寻呼机、一些调试参数……与特定实体无关，而是与请求本身相关。

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目前唯一可行的解​​决方案是挂钩内核事件，但这绝对不是我喜欢编写的代码：

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use ApiPlatform\\Core\\EventListener\\EventPriorities;\nuse Symfony\\Component\\EventDispatcher\\EventSubscriberInterface;\nuse Symfony\\Component\\HttpKernel\\Event\\GetResponseForControllerResultEvent;\nuse Symfony\\Component\\HttpKernel\\KernelEvents;\nuse Symfony\\Component\\Security\\Core\\Security;\nuse Symfony\\Component\\Serializer\\Normalizer\\NormalizerInterface;\n\nfinal class SerializeListener implements EventSubscriberInterface\n{\n    /**\n     * @var Security\n     */\n    private $security;\n\n    /**\n     * @var NormalizerInterface\n     */\n    private $normalizer;\n\n    public function __construct(\n        Security $security,\n        NormalizerInterface $normalizer\n    ) {\n        $this->security = $security;\n        $this->normalizer = $normalizer;\n    }\n\n    public function addCurrentUser(GetResponseForControllerResultEvent $event)\n    {\n        $request = $event->getRequest();\n        if ($request->attributes->has(\'_api_respond\')) {\n            $serialized = $event->getControllerResult();\n            $data = json_decode($serialized, true);\n            $data[\'hydra:user\'] = $this->normalizer->normalize(\n                $this->security->getUser(),\n                $request->attributes->get(\'_format\'),\n                $request->attributes->get(\'_api_normalization_context\')\n            );\n            $event->setControllerResult(json_encode($data));\n        }\n    }\n\n    /**\n     * @inheritDoc\n     */\n    public static function getSubscribedEvents()\n    {\n        return [\n            KernelEvents::VIEW => [\n                \'addCurrentUser\', \n                EventPriorities::POST_SERIALIZE,\n            ],\n        ];\n    }\n\n}\n

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有任何想法吗？

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谢谢你，\n本

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Answer 1

好吧，我终于成功做到了这一点。

namespace App\Api;

use Symfony\Component\Serializer\Normalizer\NormalizerAwareInterface;
use Symfony\Component\Serializer\Normalizer\NormalizerInterface;

final class ApiCollectionNormalizer implements NormalizerInterface, NormalizerAwareInterface
{
    /**
     * @var NormalizerInterface|NormalizerAwareInterface
     */
    private $decorated;

    public function __construct(NormalizerInterface $decorated)
    {
        if (!$decorated instanceof NormalizerAwareInterface) {
            throw new \InvalidArgumentException(
                sprintf('The decorated normalizer must implement the %s.', NormalizerAwareInterface::class)
            );
        }
        $this->decorated = $decorated;
    }

    /**
     * @inheritdoc
     */
    public function normalize($object, $format = null, array $context = [])
    {

        $data = $this->decorated->normalize($object, $format, $context);
        if ('collection' === $context['operation_type'] && 'get' === $context['collection_operation_name']) {
            $data['hydra:meta'] = ['foo' => 'bar'];
        }
        return $data;
    }

    /**
     * @inheritdoc
     */
    public function supportsNormalization($data, $format = null)
    {
        return $this->decorated->supportsNormalization($data, $format);
    }

    /**
     * @inheritdoc
     */
    public function setNormalizer(NormalizerInterface $normalizer)
    {
        $this->decorated->setNormalizer($normalizer);
    }

}

# config/services.yaml
services:
    App\Api\ApiCollectionNormalizer:
        decorates: 'api_platform.hydra.normalizer.collection'
        arguments: [ '@App\Api\ApiCollectionNormalizer.inner' ]

保留它作为记录:)