我有一个这样的案例类:
case class Admin(name: String, role: Role)
Role
是一个枚举
object Role extends Enumeration {
type Role = Value
val Manager = Value
}
当我尝试:
import io.circe.generic.auto._, io.circe.syntax._
val response = Admin("John", Role.Manager).asJson.noSpaces
我收到隐式编码器未找到错误。
not enough arguments for method asJson: (implicit encoder: io.circe.Encoder[Admin])io.circe.Json. Unspecified value parameter encoder.
我认为此错误是由于枚举引起的,所以我更改为:
trait Role
object Role {
object Manager extends Role
}
但这也行不通。
最后,我尝试过:
trait Role
object Manager extends Role
没有成功。有谁可以帮助我吗?谢谢!
答案 0 :(得分:1)
enumeratum-circe启用以下语法
object CirceEnumeratumExample extends App {
import enumeratum._
import io.circe.generic.auto._, io.circe.syntax._
sealed trait Role extends EnumEntry
case object Role extends Enum[Role] with CirceEnum[Role] {
case object Manager extends Role
case object User extends Role
val values = findValues
}
case class Admin(name: String, role: Role)
val response = Admin("John", Role.Manager).asJson.noSpaces
println(response)
}
输出
{"name":"John","role":"Manager"}
其中
libraryDependencies += "com.beachape" %% "enumeratum" % "1.5.13",
libraryDependencies += "com.beachape" %% "enumeratum-circe" % "1.5.21"