3

I'm using spray and I need to return a json object through a method. 

val route = 

path("all-modules") {
        get {
          respondWithMediaType(`text/html`) {
            complete( configViewer.findAllModules.toString)
          }
        }
      }

This prints ConfigResults(S1000,Success,List(testDataTypes, mandate, sdp))

But I need get this as the json object. how can I do it?

I tried in this way 

 val route =

    path("all-modules") {
      get {
        respondWithMediaType(`application/json`) {
          complete{
            configViewer.findAllModules
          }
        }
      }
    }

It gives an compilation error could not find implicit value for parameter marshaller: spray.httpx.marshalling.ToResponseMarshaller

Shashika
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  • Btw. you usually don't need to use the `respondWithMediaType` directive. The marshaller will automatically figure out which content type to use. – jrudolph Feb 28 '14 at 11:12

1 Answers1

0

You need to tell Spray how it should serialize your case class.

Just configure something like 

object JsonSupport {
    implicit val formatConfigResults = jsonFormat3(ConfigResults)
}

The number in jsonFormat'number' stands for the number of members in your case class.

Then you just need to import into your route, the class where you define this implicit.

import JsonSupport._
Arnaud Gourlay
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    If this is about spray-json it needs an `import DefaultJsonProtocol._` and an additional `import SprayJsonSupport._` in the routing file. – jrudolph Feb 28 '14 at 11:11