Hi. I was faced with a typical error with spray-json and akka-http that
easy to find in Google, but none of solutions helps me.
Scala fail compiling in place where I parsing request body with `entity`
directive. As error say, they can`t find implicit value for unmarshaller,
but formatter and `SprayJsonSupport` are present in context (in
documentation written that that`s enough).
Below is compiler message and my code.
Please help me with finding solution of this problem.
[error] /home/arhelmus/techmedia/akka-http/src/main/scala/utils/
CustomDirectives.scala:31: could not find implicit value for parameter um:
akka.http.unmarshalling.FromRequestUnmarshaller[utils.Credentials]
[error] entity(as[Credentials]).flatMap { credentials =>
package utils
import akka.http.marshallers.sprayjson.SprayJsonSupport
import akka.http.server.Directive1
import models.User
import spray.json._
case class Credentials(login: String, password: String)
trait Protocols extends DefaultJsonProtocol {
implicit val formatter: RootJsonFormat[Credentials] = jsonFormat2(
Credentials.apply)
}
object CustomDirectives extends CustomDirectives
trait CustomDirectives extends SprayJsonSupport with Protocols {
import akka.http.server.directives.BasicDirectives._
import akka.http.server.directives.MarshallingDirectives._
import akka.http.server.directives.ParameterDirectives._
def authenticateByToken: Directive1[User] =
parameter("token").flatMap { code =>
provide(User(code, "asdsada", "asdsadasd"))
}
def authenticateByCredentials: Directive1[User] = {
entity(as[Credentials]).flatMap { credentials =>
provide(User(credentials.login, credentials.login, credentials.
password))
}
}
}
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