Symfony3-序列化嵌套实体

所以我有两个实体，一个订阅和一个订户。单个订户（多个）有多个订阅。我为这两个实体都编写了自定义规范化器，但一旦订阅服务器被规范化为JSON，就很难让它在订阅中显示

我能够让它工作的唯一方法是将“订户”规范化器传递给“订阅”规范化器。似乎我应该能够使用SerializerAwareNormalizer特性，或者类似的东西，让Symfony递归地规范化我的相关实体

services:
acme.marketing.api.normalizer.subscription:
    class: acme\MarketingBundle\Normalizer\SubscriptionNormalizer
    arguments: ['@acme.marketing.api.normalizer.subscriber']
    public: false
    tags:
        - { name: serializer.normalizer }
acme.marketing.api.normalizer.subscriber:
    class: acme\MarketingBundle\Normalizer\SubscriberNormalizer
    public: false
    tags:
        - { name: serializer.normalizer }

<?php
namespace acme\MarketingBundle\Normalizer;

use acme\MarketingBundle\Entity\Subscription;
use Symfony\Component\Serializer\Normalizer\NormalizerAwareInterface;
use Symfony\Component\Serializer\Normalizer\NormalizerAwareTrait;
use Symfony\Component\Serializer\Normalizer\NormalizerInterface;

class SubscriptionNormalizer implements NormalizerInterface, NormalizerAwareInterface
{

    use NormalizerAwareTrait;

    public function normalize($subscription, $format = null, array $context = [])
    {

        return [
            "id" => $subscription->getId(),
            "subscriber" => $this->normalizer->normalize($subscription->getSubscriber())
        ];
    }



    public function supportsNormalization($data, $format = null)
    {
        return $data instanceof Subscription;
    }

}

和标准化器

<?php
namespace acme\MarketingBundle\Normalizer;

use acme\MarketingBundle\Entity\Subscription;
use Symfony\Component\Serializer\Normalizer\NormalizerInterface;

class SubscriptionNormalizer implements NormalizerInterface
{


    private $subscriberNormalizer;

    public function __construct($subscriberNormalizer)
    {
        $this->subscriberNormalizer = $subscriberNormalizer;
    }

    public function normalize($subscription, $format = null, array $context = [])
    {

        /* @var $subscription Subscription */
        $subscriber = $subscription->getSubscriber();

        return [
            "id" => $subscription->getId(),
            "subscriber" => $this->subscriberNormalizer->normalize($subscriber, $format)
        ];
    }



    public function supportsNormalization($data, $format = null)
    {
        return $data instanceof Subscription;
    }

}

---

在谷歌上花了几个小时，却无法理解。在5分钟后发布，点击正确的google链接：（。答案似乎是在自定义规范化器上实现NormalizerAwareInterface，然后使用NormalizerAwareTrait访问嵌套实体的规范化器

services:
acme.marketing.api.normalizer.subscription:
    class: acme\MarketingBundle\Normalizer\SubscriptionNormalizer
    arguments: ['@acme.marketing.api.normalizer.subscriber']
    public: false
    tags:
        - { name: serializer.normalizer }
acme.marketing.api.normalizer.subscriber:
    class: acme\MarketingBundle\Normalizer\SubscriberNormalizer
    public: false
    tags:
        - { name: serializer.normalizer }

<?php
namespace acme\MarketingBundle\Normalizer;

use acme\MarketingBundle\Entity\Subscription;
use Symfony\Component\Serializer\Normalizer\NormalizerAwareInterface;
use Symfony\Component\Serializer\Normalizer\NormalizerAwareTrait;
use Symfony\Component\Serializer\Normalizer\NormalizerInterface;

class SubscriptionNormalizer implements NormalizerInterface, NormalizerAwareInterface
{

    use NormalizerAwareTrait;

    public function normalize($subscription, $format = null, array $context = [])
    {

        return [
            "id" => $subscription->getId(),
            "subscriber" => $this->normalizer->normalize($subscription->getSubscriber())
        ];
    }



    public function supportsNormalization($data, $format = null)
    {
        return $data instanceof Subscription;
    }

}