Hi! I’m encountering a very strange behaviour when...

# serialization

[functionaldude]

Hi!
I’m encountering a very strange behaviour when using the Ktor JS client with JsonFeature . I have the following class structure:

@Serializable
sealed class Base {

  @Serializable
  class Child: Base()
}

When I do a post request with Child() as body, the class discriminator is missing (the body is just {}). I figured out that `Child`’s serializer is used, if I use `Base`’s serializer then the class discriminator is there:

val payload = Base.Child()
  val payloadString1 = kotlinxSerializer.encodeToString(Base.serializer(), payload) // payloadString1 = "{"@class": "com.example.Base.Child"}"
  val payloadString2 = kotlinxSerializer.encodeToString(Base.Child.serializer(), payload) // payloadString2 = "{}"

The problem is, I can’t find a way to force the Ktor client to use the sealed class’s serializer.
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