How can I serialize class with set of class by `ko...

# ktor

[aleksey.tomin]

How can I serialize class with set of class by kotlinx-serialization in 1.3.0?
I have kotlinx.serialization.SerializationException: Can't locate argument-less serializer for class DeviceItems
All examples for older versions

@Serializable
data class DeviceItems(val id: String, val rows: Set<DeviceItem>)

[SerVB]

Is DeviceItem annotated with Serializable?

[aleksey.tomin]

Yes.

@Serializable
data class DeviceItem(val appPackage: String, ... ): BaseItem()

@Serializable
abstract class BaseItem { val timestamp: Long = currentTimestamp }

[aleksey.tomin]

Maybe it’s important class BaseItem is a superclass for all classes.

@Serializable
data class DeviceItems(val id: String, val rows: Set<DeviceItem>): BaseItem()

[aleksey.tomin]

And I have the same problem with class

import kotlinx.serialization.Serializable

@Serializable
data class SystemInfo(val platform: String, val sdkVersion: String)

[SerVB]

Oh, no idea then...

[aleksey.tomin]

Maybe i’ve made a mistake in configuration file?
root build.gradle.kts

plugins {
    kotlin("multiplatform") version "1.3.72"
    id("kotlinx-serialization") version "1.3.72"
}
...

root settings.gradle.kts

pluginManagement {
    resolutionStrategy {
        eachPlugin {
            if (requested.id.id == "kotlinx-serialization") {
                useModule("org.jetbrains.kotlin:kotlin-serialization:${requested.version}")
            }
        }
    }
...

module build.gradle.kts

val ktorVersion = "1.3.2"
        commonMain {
            dependencies {
                implementation("io.ktor:ktor-client-core:$ktorVersion")
                implementation("io.ktor:ktor-client-json:$ktorVersion")
                implementation("io.ktor:ktor-client-serialization:$ktorVersion")
...
        macosMain { 
            dependencies {
                implementation("io.ktor:ktor-client-curl:$ktorVersion")
                implementation("io.ktor:ktor-client-core-native:$ktorVersion")
                implementation("io.ktor:ktor-client-json-native:$ktorVersion")
                implementation("io.ktor:ktor-client-serialization-native:$ktorVersion")
            }
        }

It’s ok?

[aleksey.tomin]

@SerVB
1. Why kotlinx-serialization plugin must be version 1.3.72, not 1.3.2?
2. Why I can’t define plugin by kotlin("kotlinx-serialization") version "1.3.72" and have to write id("kotlinx-serialization") version "1.3.72" ?

[SerVB]

I'm not sure how to use kx.serialization in ktor, but I've used it standalone. And it requires another plugin, not id("kotlinx-serialization") version "1.3.72", but kotlin("plugin.serialization") version "1.3.70", as described here: https://github.com/Kotlin/kotlinx.serialization#gradle

[Takashi]

Here is my sample repo with using kotlinx.serialization.
https://github.com/morin128/ktor-http-api/blob/master/src/models/Order.kt
And i’m using the versions below.
ktor : 1.3.2
kotlin : 1.3.70