Incorrect deserialization of a kotlin class when loading it from mongodb about spring-data-mongodb HOT 2 OPEN

Care to provide the UserId type? Ideally, you would provide a minimal reproducer as GitHub repo or zip file (attached to this issue) so that we have an exact reproducer.

One more thing: Looking at your dependency versions, it seems that you're using Spring Boot 3.0.4 that uses Spring Data Commons 3.0.4.

Kotlin value class support was introduced in a later version 3.2, as I'd anticipate inline/value class usage here.

from spring-data-mongodb.

Providing minimal working example would take some time, because project is a bit messy rn, so here are the classes

internal class UserId(val id: String) {

    companion object {
        fun fromString(eventId: String?): UserId {
            if (eventId == null) {
                throw RuntimeException("UserId can not be null.")
            }
            return UserId(eventId)
        }

        fun createNew(): UserId = UserId("user-" + getRandomString(15))
    }
    // skipped toString, equals, hashCode, which I generated trying to find the root cause
}

Converters

@WritingConverter
internal class UserIdToStringConverter : Converter<UserId, String> {
    override fun convert(source: UserId): String {
        return source.id
    }
}

@ReadingConverter
internal class StringToUserIdConverter : Converter<String, UserId> {
    override fun convert(source: String): UserId {
        return UserId.fromString(source)
    }
}

Thanks for the ticket link, didn't know value classes were not supported yet, I'll pack the minimal reproducable example later today, but from the debugging I've done, it's not the "value" class, because UserId object is being restored correctly, the problem lies in parameters list having 3 values instead of 2, where first 2 are real parameters and the last one is null.

from spring-data-mongodb.