3
我正在使用Spray構建REST API。 我的JSON數據類型之一是遞歸的:無法找到惰性格式化的遞歸JSON類型作爲隱式值
case class Container(id: String,
name: String,
read_only: Boolean,
containers: List[Container],
content: List[Content])
object PeriusJsonProtocol extends DefaultJsonProtocol {
implicit val contentFormat = jsonFormat8(Content)
implicit val containerFormat: JsonFormat[Container] = lazyFormat(jsonFormat5(Container))
}
當完成在HttpService的我碰到下面的錯誤路線:
Error:(49, 18) could not find implicit value for parameter um: spray.httpx.unmarshalling.FromRequestUnmarshaller[Container]
entity(as[Container]) { container =>
^
Error:(49, 18) not enough arguments for method as: (implicit um: spray.httpx.unmarshalling.FromRequestUnmarshaller[Container])spray.httpx.unmarshalling.FromRequestUnmarshaller[Container].
Unspecified value parameter um.
entity(as[Container]) { container =>
^
的HttpService的是這樣的:
import akka.actor.Actor
import spray.routing._
import spray.httpx.SprayJsonSupport._
import PeriusJsonProtocol._
class RestServiceActor extends Actor with RestService {
def actorRefFactory = context
def receive = runRoute(projectsRoute)
}
// this trait defines our service behavior independently from the service actor
trait RestService extends HttpService {
private val PROJECTS = "projects"
val projectsRoute =
path(PROJECTS) {
get {
complete(MongoUtil.getAll(PROJECTS, META) map ContainerMap.fromBson)
//complete(Container("test", "name", false, List(), List()))
} ~ post {
entity(as[Container]) {
//complete(MongoUtil.insertProject(container))
complete(container)
}
}
}
}
的在GET
工作,即使該函數返回Containers列表中的complete
。 get
中的註釋行不起作用,但它不起作用來隱式轉換Container中的post
,如錯誤消息中所示。我應該怎麼做才能使容器工作隱含並仍然保持其遞歸結構?
如此簡單,卻又如此多小時,太感謝你了! – spydon