rejectEmptyResponse
Replaces a response with no content with an empty rejection.
Signature
def rejectEmptyResponse: Directive0
Description
The rejectEmptyResponse
directive is mostly used with marshalling Option[T]
instances. The value None
is
usually marshalled to an empty but successful result. In many cases None
should instead be handled as
404 Not Found
which is the effect of using rejectEmptyResponse
.
Example
val route = rejectEmptyResponse {
path("even" / IntNumber) { i =>
complete {
// returns Some(evenNumberDescription) or None
Option(i).filter(_ % 2 == 0).map { num =>
s"Number $num is even."
}
}
}
}
Get("/even/23") ~> sealRoute(route) ~> check {
status === StatusCodes.NotFound
}
Get("/even/28") ~> route ~> check {
responseAs[String] === "Number 28 is even."
}