Packages

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  Definition Classes

  root

•  package play

  Definition Classes

  root

•  package api

  Definition Classes

  play

•  package libs

  Definition Classes

  api

•  package json

  Json API

  Json API

  For example:

  import play.api.libs.json._
  import play.api.libs.functional.syntax._
  
  case class User(id: Long, name: String, friends: Seq[User] = Seq.empty)
  object User {
  
    // In this format, an undefined friends property is mapped to an empty list
    implicit val format: Format[User] = (
      (__ \ "id").format[Long] and
      (__ \ "name").format[String] and
      (__ \ "friends").lazyFormatNullable(implicitly[Format[Seq[User]]])
        .inmap[Seq[User]](_ getOrElse Seq.empty, Some(_))
    )(User.apply, unlift(User.unapply))
  }
  
  object MyController extends play.api.mvc.Controller {
     def displayUserAsJson(id: String) = Action {
        Ok(Json.toJson(User(id.toLong, "myName")))
     }
  
     def saveUser(jsonString: String)= Action {
       val user = Json.parse(jsonString).as[User]
       //myDataStore.save(user)
       Ok
     }
  }

  Definition Classes

  libs

•  object JsonNaming

  Naming companion

  Naming companion

  Definition Classes

  json

• Identity
• PascalCase
• SnakeCase

play.api.libs.json.JsonNaming

PascalCase 