Scala object to Json with Play API -

i need handle case hasn't been answered question: convert scala object json

basically, don't know how handle list , map types. i've tried following doesn't work:

implicit val anyvalwriter = writes[any] (a =>   match {     case v: double => json.tojson(v)     case v: float => json.tojson(v)     case v: long => json.tojson(v)     case v: int => json.tojson(v)     case v: string => json.tojson(v)     case v: iterable[any] => json.tojson(v.map(t => json.tojson(t)).tolist)     case v: map[string, any] => jsobject(v.map { case (k, v) => (k, json.tojson(v)) }.tolist)     // or, if don't care value     case _ => throw new runtimeexception("type not serializable.") }) 

the resulting error is: no json serializer found type any. try implement implicit writes or format type.

trying add anyvalwriter json.tojson results in: recursive value anyvalwriter needs type

any idea?

i sorted problem out through workaround. i've chosen not handle iterable & map types in writes[any] , used wrapper handle both types in case any won't occurrence of either list[...] or map[string, any].

here's code interested:

implicit val anyvalwriter = writes[any] (a =>   match {     case v: double => json.tojson(v)     case v: float => json.tojson(v)     case v: long => json.tojson(v)     case v: int => json.tojson(v)     case v: string => json.tojson(v)     case v: jsarray => v     // or, if don't care value     case _ => throw new runtimeexception("type not serializable.") }) 

and wrapper:

  def converttojsonvalue(v : iterable[map[string, any]])(implicit write: writes[any]) = {     jsarray(v.map(t => jsobject(t.map {       case (k, value) => (k, json.tojson(value)(write)) }.tolist)).tolist)   } 

i'll find out later if can sort out ugly jsarray case.

ps: know it's wrong i'm using sql api returns map[string, any] don't know columns returned (and have reasons , not use orm feature).