Mysql 使用嵌套类别反序列化JSON

我的控制器类：

public function postAction(Request $request)
{
    $content = $request->getContent();

    $category = $this->get('jms_serializer')->deserialize($content,'AppBundle\Entity\Category','json');

    $errors = $this->get('validator')->validate($category);

    if (count($errors) > 0) {
        return new View("NAME LENGTH MUST BE >4",Response::HTTP_BAD_REQUEST);
    } else {
        $em = $this->getDoctrine()->getManager();
        $em->persist($category);
        $em->flush();

        return new View($category, Response::HTTP_OK);
    }
}

实体：

class Category
{

    private $id;
    private $parent;
    public function getChildren()
    {
        return $this->children;
    }
    private $children;

    public function __construct()
    {
        $this->children = new ArrayCollection();
    }

   //setters and getters

Doctrine.yml：

AppBundle\Entity\Category:
  type: entity
  oneToMany:
        children:
            targetEntity: AppBundle\Entity\Category
            mappedBy: parent
            orderBy:
                name: ASC
  manyToOne:
        parent:
            targetEntity: AppBundle\Entity\Category
            inversedBy: children
            joinColumn:
                name: parentId
                referencedColumn: id
  table: category
  repositoryClass: AppBundle\Repository\CategoryRepository
  id:
      id:
          column: id
          type: integer
          id: true
          generator:
              strategy: AUTO
  fields:
      name:
          type: string
          lenght: 255

当我发送POST json请求时，如下所示：

{
    "name": "Child to 8",
    "parentId": "8"
}

在MySQL表中，我没有收到parentId:

mysql> select * from category;
+----+--------------------+----------+
| id | name               | parentId |
+----+--------------------+----------+
|  1 | Primary Category   |     NULL |
|  2 | Secondary Category |        1 |
|  3 | D_child            |        1 |
|  4 | F_child            |        1 |
|  5 | Z_child            |        1 |
|  6 | Y_child            |        1 |
|  7 | H_child            |        1 |
|  8 | A_child            |        1 |
|  9 | Child to 8         |     NULL |<----- must be 8
+----+--------------------+----------+

我知道id是一个整数，但parentId已经是类Category的对象了。但是怎样才能让他也签约呢？

---

我该怎么做？也许我不明白什么…

您需要一个用于序列化程序的

.yml

配置文件。在您的例子中-

Entity.Category.yml

。

---

在这个文件中，添加嵌套实体的属性，为他设置一种类型的you实体，并确保访问器（setter、getter）

我怎么能做到<代码>添加嵌套实体的属性？输出属性parentId中是否有？即使只有标量值。

{
    "id": 9,
    "name": "Child to 8"
}