Error while serializing generic case class.

[MADHUSUDAN D]

Hi,

I am new to scala and spray-json.

I am getting error : Can not find jsonWriter of jsonFormat type for class abc[A]. This is my example

case class abc[+T](msg: T)

implicit def abcFomat[A: JsonFormat] = jsonFormat1(abc.apply[A])

def test[A] (a:abc[A])={

    println(a.toJson) 

  }