I have many value classes that make up a larger object case class. final case class TopLevel( foo: Foo, bar: Bar ) final case class Foo(foo: String) extends AnyVal final case class Bar(bar: Str...

I have a recursive class defined : case class SettingsRepository(id: Option[BSONObjectID], name: Option[String], children: Option[List[SettingsRepository]]) with a JSON implicit format as below ...

Given the following JSON: { "field1": "value1", "field2": "", "field3": "value3", "field4": "" } How do I get tw...

In the following example (scala 2.11 and play-json 2.13) val j ="""{"t":2.2599999999999997868371792719699442386627197265625}""" println((Json.parse(j) \ "t").as[BigDecimal].compare(BigDecimal("2.2...

I have a set of case objects that inherits from a trait as below: sealed trait UserRole case object SuperAdmin extends UserRole case object Admin extends UserRole case object User extends User...

I need to get a simple JSON serialization solution with minimum ceremony. So I was quite happy finding this forthcoming Play 2.2 library. This works perfectly with plain case classes, e.g. import ...

I am trying to marshall and un-marshall an Option[String] field to and from JSON. For my use-case, a None value should be marshaled as "null". Here is the code I have: import org.scalatest.{FlatSp...

I have an empty case class corresponding to an HTTP GET request: case class GetFoo() extends MyQueryRequest { // ... } and each message has a companion object with describes its implicit JSON w...

I need help to parse a json string into scala class using playJson I wrote a formatter but I don't know how to handle the nested arrays. Where Document Case class is case class Document(content:...

I need to save a Json Field as a column of my Play Framework Model. My table parser in DAO is class Table(tag: Tag) extends Table[Model](tag, "tablename") { implicit val configFormat = Json.form...