I have another question :smirk: Using polymorphism...

# serialization

[dagomni]

I have another question 😏
Using polymorphism AND generics

@Serializable
sealed class Response<T> {
    @Serializable
    data class ResponseData<T>(
        @SerialName("data")
        val data: T
    ) : Response<T>()

    @Serializable
    data class AuthData(
        @SerialName("data")
        val data: AdditionalAuthorization?
    ) : Response<AdditionalAuthorization?>()
}

I get this error

Unexpected JSON token at offset 0: Expected '[, kind: SEALED'.

It fails even with the simplest json. Apart from sealed classes I've also tried interface, open, abstract - same error, different kind given in message. Is what I'm trying to achieve supported by kotlinx.serialization?

[Dominaezzz]

The simple answer is erased generics are hard to deal with.

[Dominaezzz]

For a solution, do you actually need Response to be generic?

[Dominaezzz]

@Serializable
sealed class Response {
    @Serializable
    data class ResponseData<T>(
        @SerialName("data")
        val data: T
    ) : Response()

   @Serializable
    data class AuthData(
        @SerialName("data")
        val data: AdditionalAuthorization?
    ) : Response()
}