hi, I've implemented a very simple class with 3 fi...

# serialization

[oday]

hi, I've implemented a very simple class with 3 fields:

import kotlinx.serialization.Serializable

@Serializable
data class BirdImage(
    val author: String,
    val category: String,
    val path: String
)

and I have this http client using Ktor

val httpClient = HttpClient {
    install(ContentNegotiation) {
        json()
    }
}

then i've got this simple method to just get the results from that URL

private suspend fun getImages(): List<BirdImage> {
    val images = httpClient
        .get("<https://sebastianaigner.github.io/demo-image-api/pictures.json>")
        .body<List<BirdImage>>()
    return images
}

I am always getting back: Expected class kotlinx.serialization.json.JsonObject as the serialized body of kotlinx.serialization.Polymorphic<List>, but had class kotlinx.serialization.json.JsonArray if i wanna run that call println(getImages())

kotlinx.serialization is at version 1.5.1
ktor is at 2.3.1 - tried with 2.3.2 as well, same

The code is here https://github.com/Odaym/cmp-1/blob/main/shared/src/commonMain/kotlin/App.kt

[oday]

SOLVED: there was a mismatch between the version of kotlinx.serialization plugin and the version of kotlin being used

serialization was 1.8.21 and kotlin was 1.9.0

setting Kotlin back to 1.8.20 solved it

that version for serialization is the latest, there's no 1.9.0 so I dont know if it supports latest kotlin

[sandwwraith]

there's no 1.9.0

That is not true. Serialization plugin is released together with Kotlin, so for every Kotlin version there's a matching serialization plugin version

[oday]

Aha then

[oday]

Thank you for reading and correcting this!