play.api.libs.json.Json

JsValueWrapper

sealed trait JsValueWrapper extends NotNull

Next is the trait that allows Simplified Json syntax :

Example :

JsObject(Seq(
   "key1", JsString("value"),
   "key2" -> JsNumber(123),
   "key3" -> JsObject(Seq("key31" -> JsString("value31")))
)) == Json.obj( "key1" -> "value", "key2" -> 123, "key3" -> obj("key31" -> "value31"))

JsArray(JsString("value"), JsNumber(123), JsBoolean(true)) == Json.arr( "value", 123, true )

There is an implicit conversion from any Type with a Json Writes to JsValueWrapper which is an empty trait that shouldn't end into unexpected implicit conversions.

Something to note due to JsValueWrapper extending NotNull : null or None will end into compiling error : use JsNull instead.

Source
Json.scala
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NotNull, AnyRef, Any
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  1. final def !=(arg0: AnyRef): Boolean

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