我试图使用我的域对象作为请求/响应正文参数.我正在使用喷涂路由和[T]来解组对象.但是我经常找不到参数um的隐含值:spray.httpx.unmarshalling.FromRequestUnmarshaller.虽然我已经手动向对象对象添加了隐式unmarshaller但是我得到了同样的错误.我不知道出了什么问题.事件I的这个
JSON序列化器/反序列化器已经编写,因为我需要序列化joda DateTime对象.
package services
import spray.routing.HttpService
import org.joda.time.DateTime
import org.joda.time.format.{DateTimeFormatter, ISODateTimeFormat}
import spray.httpx.unmarshalling.FromRequestUnmarshaller
import spray.json._
import services.EventsService.Event
import spray.httpx.SprayJsonSupport
trait EventsService extends HttpService {
val eventsRoute =
path("/events") {
get {
import EventsService._
entity(as[Event]) { event =>
complete(s"${event.toString}")
}
}
}
}
object EventsService extends DefaultJsonProtocol with SprayJsonSupport{
trait DateFormatter {
val formatter: DateTimeFormatter
}
trait DateParser {
val parser: DateTimeFormatter
}
implicit object EventFormatter extends RootJsonFormat[Event] with DateFormatter with DateParser {
def read(json: JsValue): Event = json match {
case obj: JsObject =>
val name = obj.fields.get("name").map(_.asInstanceOf[JsString].value).
getOrElse(deserializationError("field name not present"))
val city = obj.fields.get("city").map(_.asInstanceOf[JsString].value).
getOrElse(deserializationError("field city not present"))
val starts = obj.fields.get("starts").map(x => parser.parseDateTime(x.asInstanceOf[JsString].value)).
getOrElse(deserializationError("field starts not present"))
val ends = obj.fields.get("ends").map(x => parser.parseDateTime(x.asInstanceOf[JsString].value)).
getOrElse(deserializationError("ends field not present"))
Event(name, city, starts, ends)
case _ => deserializationError("wrong object to deserialize")
}
def write(e: Event): JsValue =
JsObject(Map(
"name" -> JsString(e.name),
"city" -> JsString(e.city),
"starts" -> JsString(formatter.print(e.starts)),
"ends" -> JsString(formatter.print(e.ends))
))
val formatter = ISODateTimeFormat.dateTimeNoMillis()
val parser = ISODateTimeFormat.dateTimeNoMillis().withOffsetParsed()
}
case class Event(name: String, city: String, starts: DateTime, ends: DateTime)
}
最佳答案 好的,我已经明白了.结构的顺序是错误的.首先应该是伴侣对象和第二个具有路线的特征.我不知道为什么,但它现在有效.