问使用Play JSON将数组读入自定义对象列表的最简单方法

EN

{
  "test": "...",
  "items": [
     { "id": 44, "time": "2015-11-20T11:04:03.544" },
     { "id": 45, "time": "2015-11-20T11:10:10.101" }
  ]
}

import play.api.libs.json.Json

case class Incoming(test: String, items: List[Item])

object Incoming {
  implicit val reads = Json.reads[Incoming]
}


case class Item(id: Long, time: String)

object Item {
  implicit val reads = Json.reads[Item]
}

def test() = Action(parse.json) { request =>
  request.body.validate[Incoming].map(incoming => {
     // ... handle valid incoming data ...
  }).getOrElse(BadRequest)
}

No implicit format for List[models.Item] available.
[error]   implicit val reads = Json.reads[Incoming]
                       ^
No Json deserializer found for type models.Incoming. 
Try to implement an implicit Reads or Format for this type.
[error]     request.body.validate[Incoming].map(incoming => {