Complete generate a null value in akka-http

[Samuel Heredia]

Hi! , I have a Route where if a function finds a data in the DB responds a value of type Json,

when it does not find the value it responds with null and therefore the complete responds null.

I want to validate this so that it does not respond null, but a String that says: "Not found", this is my route, any help? Thanks

val route = pathPrefix("auth") {
  path("signIn") {
    pathEndOrSingleSlash {
      post {
        entity(as[LoginPassword]) { loginPassword =>
          val a = signIn(loginPassword.login, loginPassword.password).map(_.asJson)
           if(signIn(loginPassword.login, loginPassword.password).map(_.asJson) == null){
             complete(states.map(_.asJson))
           }else {
             def getObject : Option[Any] = Option(signIn(loginPassword.login, loginPassword.password).map(_.asJson))
             val ahh = signIn(loginPassword.login, loginPassword.password).map(_.asJson)
             if(getObject.isEmpty || getObject == null){ ///////NOT FOUND
               complete("Not Found")
             }else {
               complete(complete(signIn(loginPassword.login, loginPassword.password).map(_.asJson))
             }
             //complete(signIn(loginPassword.login, loginPassword.password).map(_.asJson))
           }
        }
      }
    }
  } 

[Konrad “ktoso” Malawski]

Don’t return null in scala code, that’s very not-scala-style.

Instead you could return empty things, or best rather even to throw an exception and make your handler

https://doc.akka.io/docs/akka-http/current/scala/http/routing-dsl/exception-handling.html make it into a not found response.

-- 

Cheers,

Konrad 'ktoso' Malawski

Akka @ Lightbend

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[Samuel Heredia]

Thanks!!

      I finally realized this

               

val route = pathPrefix("auth") {
  path("signIn") {

    post {
      entity(as[LoginPassword]) { loginPassword =>

        val token = signIn(loginPassword.login, loginPassword.password)
        val response = token.map(_ match {
          case Some(token) => prepareHttpResponse(StatusCodes.OK, token.asJson.toString)
          case None => prepareHttpResponse(StatusCodes.Unauthorized, "{reason: \"not found\"")
        })
        complete(response)
      }
    }
  }

More detail in: https://stackoverflow.com/questions/46856140/how-to-validate-complete-in-akka-http

[Samuel Heredia]