JSONCollection

something.scala

object CollectionImplicits {

  implicit class RichJSONCollection(val self: JSONCollection) extends AnyVal {

    def insertWithTimestamp(document: JsObject) = {
      self.insert(document ++ Json.obj("updatedAt" -> new java.util.Date().getTime))
    }
  }
}

// Usage
case class Board(name: String, sections: List[Section])
object JsonFormats {
  implicit val boardFormat = Json.format[Board]
  implicit val boardReads = Json.reads[Board]
}
private lazy val collection: JSONCollection = database.collection[JSONCollection]("boards")
def create(board: Board) = collection.insert(board) // now, board is writable to JSON, but I want above insertWithTimestamp to work here