scala - Play Framework Json Object mapping partial objects -


another play framework 2.1 question documentation techie me wrap head around.

if have scala case class object represents something, server:

case class server(name: string, ip: string, operatingsystem: enums.operatingsystem)  implicit val serverreads = ((__ \ "name").read[string] , (__ \ "ip").read[string] , (__ \ "os").read[enums.operatingsystem])(server.apply _)  implicit val serverwrite = ((__ \ "name").write[string] , (__ \ "ip").write[string] , (__ \ "os").write[enums.operatingsystem])(unlift(server.unapply))

i create json reads , writes , can process whole object, fine.

but possible map partial objects?

for example, if had server wasn't active may not have ip, know change option[string] , map none, isn't perfect example, if wanted simplify json model without changing underlying case class, can map values class fields, whilst leaving others @ default?

thanks

tom

you create custom apply methond i.e. simplaapply. create object simpleserver matching json structure. when working case classes can define instance default data , copy instance while overwriting new data i.e. i.copy(prop1=42).


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