I have this data class ```@Serializable data class...

# kotlin-native

[Susheel]

I have this data class

@Serializable
data class User(
    @SerialName("UserName")
    val name: String,
    @SerialName("UserId")
    val userID: String,
)

and yet I'm seeing the following exception

name: Error Domain=KotlinException Code=0 "No transformation found: class kotlin.ByteArray -> class com.xxx.kmmsharedmodule.User

in my kmm module

[russhwolf]

I think that error usually means something wrong in your Ktor or Serialization configuration but it's hard to say without more code.

[Susheel]

It is a compile time issue but I think that was already apparent.

[Susheel]

what else can I provide in order to get more thoughts/ideas to investigate?

[russhwolf]

if it's compile-time, maybe you're missing the serialization plugin?

[Susheel]

Is this the correct documentation for it? https://github.com/Kotlin/kotlinx.serialization#using-apply-plugin-the-old-way

[Susheel]

just wanted to make sure

[russhwolf]

I usually use the plugins block rather than apply plugin but either should work. It's probably easiest to just do the same thing as you're doing for the kotlin plugin.

[Susheel]

Actually the client seems to be doing it...

private val httpClient by lazy {
        HttpClient(httpEngine) {
            install(JsonFeature) {
                val json = kotlinx.serialization.json.Json { ignoreUnknownKeys = true }
                serializer = KotlinxSerializer(json)
            }
        }
    }

[louiscad]

@Susheel That is not the configuration in the Gradle files. Any module that relies on the serialization plugin must apply it, or compilation will fail or produce unexpected results.