JSON格式与播放2.4 /斯卡拉

Question

我知道这个问题已被问过千次，但我不知道为什么这个代码无法正常工作。

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)) 
} 

而且我现在面临

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 

难道不应该是工作？

Answer 1

您需要定义合作伙伴对象中的读者和作者。

这是一个例子，https://github.com/luongbalinh/play-mongo/blob/master/app/models/User.scala