具有ManyToMany关联的FOSRest视图实体防止深层嵌套json数组

use FOS\RestBundle\Serializer\Normalizer\AbstractNormalizer;

class EntitySerializer extends AbstractNormalizer
{
    public function normalize($object, $format = null, array $context = [])
    {
        // 根据需要定义实体的序列化规则
        $data = parent::normalize($object, $format, $context);

        // 处理ManyToMany关联的属性
        $data['related_entities'] = $object->getRelatedEntities();

        return $data;
    }
}

use FOS\RestBundle\Controller\AbstractFOSRestController;
use FOS\RestBundle\Controller\Annotations as Rest;

class EntityController extends AbstractFOSRestController
{
    /**
     * @Rest\Get("/entities/{id}")
     */
    public function getEntityAction(Entity $entity)
    {
        $view = $this->view($entity, 200);
        $view->setSerializerGroups(['Default']);
        $view->setSerializer(new EntitySerializer());

        return $this->handleView($view);
    }
}