如何（通过JSON模式）验证数组元素是否存在于文档中？

Question

例如，如果我有一个像这样的json对象：

{
  "people":[
     {"id":"a","name":"a","gender":"m"},
     {"id":"b","name":"b","gender":"f"},
     {"id":"c","name":"c","gender":"f"},
     {"id":"d","name":"d","gender":"m"}
],
 "over21":[
      "a",
      "c"
 ]
}

，我想验证一下在people数组中是否存在over21数组中的每个名称。 使用$ ref不能解决问题，因为它可以验证其类型，但不能验证其在其他地方的存在。

应该失败验证的json示例（因为“ e”不存在）：

{
  "people":[
     {"id":"a","name":"a","gender":"m"},
     {"id":"b","name":"b","gender":"f"},
     {"id":"c","name":"c","gender":"f"},
     {"id":"d","name":"d","gender":"m"}
],
 "over21":[
      "a",
      "e"
 ]
}

Answer 1

看看“枚举值” here。我相信这可以为您提供帮助。第一次回答，如果对您没有帮助，对不起。