scala - What is a good way to handle default values with spray-json -

in cases default values make more sense optionals in case classes:

case class car(numberofwheels:int = 4, color:string)  case class car(numbeofwheels:option[int], color:string) //silly

in first case i'd expect able convert following json instance:

{"color":"red"}

but standard jsonformat2(car), spray-json complains missing value numberofwheels.

how work around cleanly?

i stumbled upon same problem. i've create patch solves me. makes fields default value optional.

Scrio