call.respond(Object) cause error

At sample json for example: java.lang.IllegalArgumentException: Response pipeline couldn't transform 'class org.jetbrains.ktor.samples.json.Model' to the FinalContent

//ktor-test-host used

[mohammadrafigh]

I have the same problem. @cy6erGn0m Gson is installed, and @orangy application/json is set both for request and response. but the only thing works is that I manually convert to Json like this: call.respond(gson.toJson(myObject))

[mustii82]

Same Issue:

import io.ktor.application.*
import io.ktor.http.*
import io.ktor.response.*
import io.ktor.routing.*
import io.ktor.server.engine.*
import io.ktor.server.netty.*

class Person(val vorname: String, val nachname: String)

object PersonManager{
   fun getAllPersons()= Person("Bill","Gates")
}

fun main(args: Array<String>) {

    val server = embeddedServer(Netty, port = 8080) {
        routing {
            get("/hi") {
                call.respond(PersonManager.getAllPersons())
            }
            get("/demo") {
                call.respondText("HELLO WORLD!")
            }
        }
    }
    server.start(wait = true)
}