如何在使用Scala Play读取JSON时出现未知字段时抛出错误？

import play.api.libs.json._
import play.api.libs.functional.syntax._

case class MyData(name: String, age: Int)

object MyData {
  implicit val reads: Reads[MyData] = (
    (__ \ "name").read[String] and
    (__ \ "age").read[Int]
  )(MyData.apply _)

  // 自定义Reads对象，处理未知字段
  implicit val strictReads: Reads[MyData] = new Reads[MyData] {
    def reads(json: JsValue): JsResult[MyData] = {
      json.validate[MyData] match {
        case JsSuccess(data, _) => JsSuccess(data)
        case JsError(errors) =>
          // 抛出包含未知字段的错误
          val unknownFields = errors.collect {
            case (path, error) if error.isInstanceOf[JsUndefined] => path.toString()
          }
          JsError(Seq(JsPath() -> Seq(JsonValidationError("error.unknown_fields", unknownFields))))
      }
    }
  }
}

// 使用自定义的strictReads来读取JSON
val jsonString = """{"name": "John", "age": 30, "unknownField": "value"}"""
val json = Json.parse(jsonString)

val result = MyData.strictReads.reads(json)
println(result) // 输出: JsError(List((/unknownField,List(JsonValidationError(error.unknown_fields,[unknownField])))))