kotlinx.serialization: Id that wraps an ObjectId is not properly deserialized for an inherited class

[zigzago]

interface SchedulerJob {
    val id: Id<SchedulerJob>
    val action: String
}

@Serializable
data class UnmuteSchedulerJob(
    @Contextual @SerialName("_id")
   override val id: Id<SchedulerJob> = newId(),
   override val action:String
)

-> id is correctly persisted as ObjectId
-> but is deserialized as StringId (insead of WrappedObjectId)

it means that job.id != col.findOne()?.id

Workarounds:

• store your Ids as String ( IdGenerator.defaultGenerator = ObjectIdToStringGenerator )
• Or when comparing or searching by ids, ensure that ids are properly mapped (ie job.id == col.findOne()?.id?.run{ WrappedObjectId(toString()) } )
• Or declare ObjectId instead of Id<*>

[dondish]

I don't think it causes an exception though right?

[zigzago]

I don't reproduce any exception with 4.2.2 KMongo version. If you get an exception with 4.2.2, please create a new ticket.