libs

Value Members

1. package json

   

   Json API For example:

   Json API For example:

    case class User(id: Long, name: String, friends: List[User])
   
    implicit object UserFormat extends Format[User] {
     def reads(json: JsValue): User = User(
       (json \ "id").as[Long],
       (json \ "name").as[String],
       (json \ "friends").asOpt[List[User]].getOrElse(List()))
     def writes(u: User): JsValue = JsObject(List(
       "id" -> JsNumber(u.id),
       "name" -> JsString(u.name),
       "friends" -> JsArray(u.friends.map(fr => JsObject(List("id" -> JsNumber(fr.id),
       "name" -> JsString(fr.name)))))))
   }
   
   //then in a controller:
   object MyController extends Controller {
      def displayUserAsJson(id: String) = Action {
         Ok(toJson( User(id.toLong, "myName", friends: List())))
      }
      def saveUser(jsonString: String)= Action {
        val user = play.api.libs.json.Json.parse(jsonString).as[User]
        myDataStore.save(user)
        Ok
      }
   }