Kotlin - Array property in data class error

Question

I'm modelling some JSON - and using the following lines

data class Metadata(
        val id: String,
        val creators: Array<CreatorsModel>
)

along with:

data class CreatorsModel (
        val role: String,
        val name: String
)

However keep seeing the error: Array property in data class error.

Any ideas why this is?

FYI, the JSON looks like:

{
"id": "123",
"creators": [{
   "role": "Author",
    "name": "Marie"
    }
  ]
}

Answer 1

In Kotlin you should aim to use List instead of Array where possible. Array has some JVM implications, and although the compiler will let you, the IDE may prompt you to override equals and hashcode manually. Using List will make things much simpler.

You can find out more about the difference here: Difference between List and Array types in Kotlin