Remove a key from a JsValue in Scala

Question

It\'s probably a very easy question but I\'m having trouble finding a clean/working solution. I just want to remove a field from a json object I have. Let\'s say I have :

Answer 1

You can use as Method as[JsObject] with minus - symbol. Like Below.

body.as[JsObject] - "id"

Below has detailed explanation step by step. Let's see with custom object.

val json: JsValue = JsObject(Seq(
      "error" -> JsBoolean(false),
      "result" -> JsNumber(calcResult),
      "message" -> JsString(null)
    ))

It can be picked by as Method and removed "-" symbol.

/* Removing Message Property and keep the value in successResult Variable */
val successResult = json.as[JsObject] - "message"

Take a look at Body Parser in Scala to know about Choosing an explicit body parser, Combining body parsers and Writing a custom body parser.