嵌套同一个循环引用这个要json-schema怎么写?

[leslie-fei]

比如一个Player类,

class Player {
  username: string;
  password: string;
  Parent: Player;
}

这个变成json-schema要写成伪代码

{
  type: 'object',
  properties: {
    username: {
      type: 'string',
      FormItem,
      Input
    },
    password: {
      type: 'string',
      FormItem,
      Input
    },
   parent: {
     type: 'object',
     properties: {
          username: {
           type: 'string',
           FormItem,
           Input
      },
      password: {
        type: 'string',
        FormItem,
        Input
       },
      parent: {
       // 这里会无限循环引用下去, 有没有办法实现类似null语义的解决办法
      }
     }
   }
  }
}