Hey guys what this error means?

Serializer has not been found for type 'ZonedDateTime'. To use context serializer as fallback, explicitly annotate type or property with @Contextual

@Serializable
@Parcelize
data class NearestResult(
    val day: ZonedDateTime,
    val event: String
) : Parcelable

All members of a Serializable class must either be Serializable, or you need to provide some sort of serializer. ZonedDateTime doesn’t have a serializer defined.

So how can we do that?

put this :

object KZonedDateTimeSerializer : KSerializer<ZonedDateTime> {
    override val descriptor: SerialDescriptor =
        PrimitiveSerialDescriptor("ZonedDateTime", PrimitiveKind.STRING)

    override fun serialize(encoder: Encoder, value: ZonedDateTime) {
        encoder.encodeString(value.toString())
    }

    override fun deserialize(decoder: Decoder): ZonedDateTime =
        ZonedDateTime.parse(decoder.decodeString())

}

and after :

@Serializable
@Parcelize
data class NearestResult(
    @Serializable(with = KZonedDateTimeSerializer::class) val day: ZonedDateTime,
    val event: String
) : Parcelable