Hi, how can I write a serialiazer for a class where it has two properties `client` & `environmen...

# serialization

[Ayfri]

Hi, how can I write a serialiazer for a class where it has two properties client & environment, and if only client is set, it's saved as a String, else as an object containing both ?

[Adam S]

At a guess, you could create a JsonContentPolymorphicSerializer https://github.com/Kotlin/kotlinx.serialization/blob/master/docs/json.md#content-based-polymorphic-deserialization

[ephemient]

I think https://github.com/Kotlin/kotlinx.serialization/blob/master/formats/json/commonMain/src/kotlinx/serialization/json/JsonTransformingSerializer.kt will be a better fit if you have a single class to be serialized two different ways

[ephemient]

@Serializable
data class Data(val client: String, val environment: String)
object DataJsonSerializer : JsonTransformingSerializer<Data>(Data.serializer()) {
    override fun transformDeserialize(element: JsonElement): JsonElement =
        element as? JsonObject ?:  buildJsonObject {
            put("client", element)
        }
}

or something along those lines

[Ayfri]

oh as simple as that

[Ayfri]

thanks !