JSON格式與播放2.4 /斯卡拉

Question

我知道這個問題已被問過千次，但我不知道爲什麼這個代碼無法正常工作。

case class Partner 
(_id: Option[BSONObjectID], name: String, beacon: Option[Beacon]) 

class PartnerFormatter @Inject() (val beaconDao: BeaconDao){ 
    implicit val partnerReads: Reads[Partner] = (
     (__ \ "_id").readNullable[String]and 
     (__ \ "name").read[String] and 
     (__ \ "beacon").read[String] 
    )((_id, name, beaconID) => Partner(_id.map(BSONObjectID(_)), name, Await.result(beaconDao.findById(beaconID), 1 second)))) 

    implicit val partnerWrites: Writes[Partner] = (
     (JsPath \ "_id").writeNullable[String].contramap((id: Option[BSONObjectID]) => Some(id.get.stringify)) and 
     (JsPath \ "name").write[String] and 
     (JsPath \ "beacon").writeNullable[String].contramap((beacon: Option[Beacon]) => Some(beacon.get._id.get.stringify)) 
    )(unlift(Partner.unapply)) 
} 

而且我現在面臨

No Json deserializer found for type models.Partner. Try to implement an implicit Reads or Format for this type 

或者

No Json deserializer found for type models.Partner. Try to implement an implicit Writes or Format for this type 

難道不應該是工作？

Answer 1

您需要定義合作伙伴對象中的讀者和作者。

這是一個例子，https://github.com/luongbalinh/play-mongo/blob/master/app/models/User.scala