Spray client marshalling of custom case class to JSON

Spray client marshalling of custom case class to JSON

I have the following implicits:
object MyJsonProtocol extends DefaultJsonProtocol {
implicit val impStartObjSys = jsonFormat3(StartObj.Sys)
implicit val impStartObjData = jsonFormat6(StartObj.Data)
implicit val impStartObjStart = jsonFormat3(StartObj.Start)
}
It works fine with Spray router and I can normally unmarshall an object
into StartObj.Start(that takes a string and sys and data as input
parameters)
Now I am trying to write a load test and do JSON requests using the
spray-client. Unfortunately it doesn't want to accept my object as an
input paramter, error:
[error] Load.scala:85: could not find implicit value for evidence
parameter of type
>spray.httpx.marshalling.Marshaller[models.StartObj.Start] [error]
pipeline(Post(serverHost, newUser)) [error] ^
I started creating a marshaller that would resolve this issue:
implicit val StartObjMarshaller =
Marshaller.of[Start](ContentTypes.`application/json`)
{ (value, contentType, ctx) Ë
ctx.marshalTo(HttpEntity(contentType, value))
}
But here it complains about value not being of supported type. It expects
only byte array or String. I need String but in Json Format, how should I
write this marshaller so that it resolve the issue properly?
Thanks!