Managed to make it work using ```private val type ...

# kondor-json

[Razvan]

Managed to make it work using

private val type by obj(JTitleType, TitleRequest::type)

and a few tricks

data class TitleRequest(
    val id: String,
    val type: TitleType?
)

enum class TitleType(val label: String) {
    Movie("movie"), Series("series"), Episoode("episode");

    companion object {
        fun fromLabel(label: String) = values().first { it.label == label }
    }
}

object JTitleType : JStringRepresentable<TitleType>() {
    override val cons: (String) -> TitleType = ::fromLabel
    override val render: (TitleType) -> String = TitleType::label

object JTitleRequest : JAny<TitleRequest>() {
    private val id by str(TitleRequest::id)
    private val type by obj(JTitleType, TitleRequest::type)

    override fun JsonNodeObject.deserializeOrThrow(): TitleRequest =
        TitleRequest(
            id = +id,
            type = type.getter(this).recover { null }
        )
}

class KondorTest {
    @Test
    fun `type not null`() {
        val inValue = TitleRequest("tom", TitleType.Movie)
        val json = JTitleRequest.toPrettyJson(inValue).also {
            println(it)
        }

        json shouldBe """
            {
              "id": "tom",
              "type": "movie"
            }
        """.trimIndent()
    }

    @Test
    fun `type is null`() {
        val inValue = TitleRequest("tom", null)
        val json = JTitleRequest.toPrettyJson(inValue).also {
            println(it)
        }

        json shouldBe """
            {
              "id": "tom"
            }
        """.trimIndent()
    }

    @Test
    fun `type is set to null when type is unknown`() {
        val inValue = """
            {
              "id": "tom",
              "type": "unknown"
            }
        """.trimIndent()
        val title = JTitleRequest.fromJson(inValue).orThrow()

        title shouldBe TitleRequest("tom", null)
    }
}