Scala Akka (Un)用喷雾JSON编组嵌套的Seq集合

Question

我正在尝试使用Spray将下面的“Seq”集合封装到一个“BidRequest”实体中，参数如定义的那样。Seq集合主要是嵌套的，因此一些“Seq”参数字段也有需要封送的变量集合类型。然后，经过计算，目的是揭开结果作为一个实体的‘比德BidResponse’。

做这件事最好的方法是什么？

我用的是Akka-HTTP，Akka-Streams，Akka-Actor。

Seq收藏：

      val activeUsers = Seq(
          Campaign(
              id = 1,
              country = "UK",
              targeting = Targeting(
                  targetedSiteIds = Seq("0006a522ce0f4bbbbaa6b3c38cafaa0f") 
                  ),
                  banners = List(
                      Banner(
                          id = 1,
                          src ="https://business.URLTV.com/wp-content/uploads/2020/06/openGraph.jpeg",
                          width = 300,
                          height = 250
                          )
                        ),
                  bid = 5d
                )
            )

BidRequest案例类：

case class BidRequest(id: String, imp: Option[List[Impression]], site:Site, user: Option[User], device: Option[Device])

BidResponse案例类：

case class BidResponse(id: String, bidRequestId: String, price: Double, adid:Option[String], banner: Option[Banner])

其他案例类：

case class Campaign(id: Int, country: String, targeting: Targeting, banners: List[Banner], bid: Double)
case class Targeting(targetedSiteIds: Seq[String])
case class Banner(id: Int, src: String, width: Int, height: Int)

case class Impression(id: String, wmin: Option[Int], wmax: Option[Int], w: Option[Int], hmin: Option[Int], hmax: Option[Int], h: Option[Int], bidFloor: Option[Double])
case class Site(id: Int, domain: String)
case class User(id: String, geo: Option[Geo])
case class Device(id: String, geo: Option[Geo])
case class Geo(country: Option[String])

到目前为止，我已经尝试使用下面的代码，但是仍然会得到类型不匹配的错误：

import akka.http.scaladsl.marshallers.sprayjson.SprayJsonSupport._
import spray.json.DefaultJsonProtocol._

implicit val resFormat = jsonFormat2(BidResponse)
implicit val bidFormat = jsonFormat1(BidRequest)
implicit val cFormat = jsonFormat1(Campaign)
implicit val tFormat = jsonFormat1(Targeting)
implicit val bFormat = jsonFormat1(Banner)
implicit val iFormat = jsonFormat1(Impression)
implicit val sFormat = jsonFormat1(Site)
implicit val uFormat = jsonFormat1(User)
implicit val dFormat = jsonFormat1(Device)
implicit val gFormat = jsonFormat1(Geo)

Answer 1

使用喷雾JSON获取Type的原因是，您需要使用相应的jsonFormatN方法，这取决于case类中参数的数量。

就你而言：

implicit val resFormat = jsonFormat5(BidResponse)
implicit val bidFormat = jsonFormat5(BidRequest)
implicit val cFormat = jsonFormat1(Campaign)
implicit val tFormat = jsonFormat1(Targeting)
implicit val bFormat = jsonFormat4(Banner)
...