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package play

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package api

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package libs

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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

play.api.libs.json

BigDecimalParseConfig

Companion object BigDecimalParseConfig

sealed trait BigDecimalParseConfig extends AnyRef

Parse and serialization settings for BigDecimals. Defines limits that will be used when parsing the BigDecimals, like how many digits are accepted.

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AnyRef, Any

Known Subclasses

BigDecimalParseSettings

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BigDecimalParseConfig
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Abstract Value Members

abstract def digitsLimit: Int
How many digits are accepted, also related to the math context used.
How many digits are accepted, also related to the math context used. The default value is JsonConfig.defaultDigitsLimit. This can be set using the JsonConfig.digitsLimitProperty system property.
abstract def mathContext: MathContext
The MathContext used when parsing, which will be "decimal32", "decimal64", "decimal128" (default), or "unlimited".
The MathContext used when parsing, which will be "decimal32", "decimal64", "decimal128" (default), or "unlimited". This can be set using the JsonConfig.mathContextProperty system property.
abstract def scaleLimit: Int
Limits the scale, and it is related to the math context used.
Limits the scale, and it is related to the math context used. The default value is JsonConfig.defaultScaleLimit. This can be set using the JsonConfig.scaleLimitProperty system property.

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