我正在编写symfony 4.1。我在service.yml中定义了两个规范化器。

api.tone_normalizer:
    class: App\Serializer\Normalizer\JnToneNormalizer
    tags: [serializer.normalizer]

和

api.wskeytone_normalizer:
    class: App\Serializer\Normalizer\ApiWsKeyToneToneNormalizer
    tags: [serializer.normalizer]

这里的第一个规范化器知道JnTone实体。

<?php
namespace App\Serializer\Normalizer;

use App\Entity\JnTone;
use Symfony\Component\Serializer\Normalizer\NormalizerInterface;
/**
 * JnTone normalizer
 */
class JnToneNormalizer implements NormalizerInterface
{
    /**
     * {@inheritdoc}
     */
    public function normalize($object, $format = null, array $context = array())
    {

        return [
            'id'   => $object->getId(),
            'name' => $object->getName(),
        ];
    }

    /**
     * {@inheritdoc}
     */
    public function supportsNormalization($data, $format = null)
    {
        return $data instanceof JnTone;
    }
}

我想调用的第一个规范化器，rootTone是JnTone实体的一个示例，所以我想调用我的JnTone规范化器。

<?php
namespace App\Serializer\Normalizer;

use App\Entity\JnWsKey;
use App\Entity\JnTone;
use Symfony\Component\Serializer\Normalizer\NormalizerAwareInterface;
use Symfony\Component\Serializer\Normalizer\NormalizerAwareTrait;
use Symfony\Component\Serializer\Normalizer\NormalizerInterface;
use Symfony\Component\Serializer\Normalizer\SerializerAwareNormalizer;

use Symfony\Component\Serializer\SerializerAwareTrait;
use Symfony\Component\Serializer\SerializerAwareInterface;
/**
 * JnWsKey normalizer
 */
class ApiWsKeyNormalizer implements NormalizerInterface, SerializerAwareInterface
{
    use NormalizerAwareTrait;
    use SerializerAwareTrait;

    private $tones;

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

        return [
            'id'=>$object->getId(),
            'name'=>$object->getName(),
            'rootTone'=>$this->serializer->normalize($object->getRootTone(),$format,$context)

        ];


    }

    /**
     * {@inheritdoc}
     */
    public function supportsNormalization($data, $format = null)
    {
        return $data instanceof JnWsKey ;
    }


}

我不能让这个工作。第一个标准化程序找不到

Could not normalize object of type App\Entity\JnTone, no supporting normalizer found.

我到底做错了什么？