Is there a way to have a sort of `Unknown` sealed class child, that will be a fallback when all othe...

# serialization

[ursus]

Is there a way to have a sort of Unknown sealed class child, that will be a fallback when all other classes don't match?

(With annotations only? I know I can have a custom serializer a wire it up manually)

@Serializable
sealed class Item {

   @SerialName("A")
   @Serializable
   data class ChildA(..) : Item()

   @Serializable
   data class Unknown : Item() <--------
}

[Michael Krussel]

You need to specify a default deserializer in the module.

SerializesModule {
  polymorphic(Item::class) {
     defaultDeserializer { Item.Unknown.serializer() }
  }
}

[ursus]

okay so no annotation only way? shame, thanks