what I've done is have a `Data` class with nullabl...

# serialization

[hagabaka]

what I've done is have a Data class with nullable fields, and a Base class with a custom serializer which calls input.readValue() as Data in load and checks the null fields and constructs the right subtype

[sandwwraith]

basically, input.readValue() is not sufficient for deserializing, logic there is much more complicated – you should call readBegin(), then read primitives field-by-field and so on. You can take a look on standard collection serializers (https://github.com/Kotlin/kotlinx.serialization/blob/master/runtime/common/src/main/kotlin/kotlinx/serialization/internal/CollectionSerializers.kt#L58 and https://github.com/Kotlin/kotlinx.serialization/blob/master/runtime/jvm/src/main/kotlin/kotlinx/serialization/PolymorphicSerializer.kt#L37) to get an idea what happens there

[hagabaka]

oh, it seems like changing it to input.read(Data::class.serializer()) worked, but I'm still testing it