Since you are only looking to extract certain fields, you are on the right track. This modified version of your for-comprehension
will loop through your car structure, extract the make and model and only yield your case class if both items exist:
for{
car <- cars
model <- (car \ "model").extractOpt[String]
make <- (car \ "make").extractOpt[String]
} yield Car(make, model)
You would add additional required fields the same way. If you want to also utilize optional parameters, let's say color
- then you can call that in your yield section and the for comprehension won't unbox them:
for{
car <- cars
model <- (car \ "model").extractOpt[String]
make <- (car \ "make").extractOpt[String]
} yield Car(make, model, (car \ "color").extractOpt[String])
In both cases you will get back a List
of Car
case classes.