Quick question about JSON serialziation. I receive...

# serialization

[Christian Würthenr]

Quick question about JSON serialziation. I receive this beautiful JSON {"actual":"","target":null} but both values are supposed to be Float?. I already use coerceInputValues to allow string values to be parsed but the "" doesn’t get translated to null or something.

Is there a way I can tell Kotlin to use the default value if it can’t deserialize something?

[Christian Würthenr]

Otherwise that’s my solution:

class OctoSafeFloatSerializer : KSerializer<Float?> {

    override val descriptor: SerialDescriptor = PrimitiveSerialDescriptor("Float", PrimitiveKind.FLOAT)

    override fun deserialize(decoder: Decoder): Float? = try {
        decoder.decodeFloat()
    } catch (e: Exception) {
        null
    }

    @OptIn(ExperimentalSerializationApi::class)
    override fun serialize(encoder: Encoder, value: Float?) = value?.let { encoder.encodeFloat(it) } ?: encoder.encodeNull()
}

[Christian Würthenr]

@Serializable(with = OctoSafeFloatSerializer::class) val actual: Float? = null,