Hope this is the right channel for this type of qu...

# spring

[diesieben07]

Hope this is the right channel for this type of question. How do you handle the concept of optional fields in a REST API when using Kotlin? For my json output I am using data classes, for example like this: data class User(val id: UUID, val username: String). I could add all possible fields (e.g. friends) to this class, but causes some problems: I now need to make sure Jackson ignores those fields if they were not requested, my fields now have to be nullable even when they really shouldn't be.
Any ideas?