kotlinx.serialization: Can't locate companion serializer for class class List

The documentation mentiones that serializing lists is supported, but I can’t seem to get it working.

When running this code in Kotlin-JS:

import kotlinx.serialization.Serializable
import kotlinx.serialization.json.JSON

fun main(args: Array<String>) {
    val list = listOf(Foo("a"), Foo("b"))
    println(JSON.stringify(list))
}

@Serializable
data class Foo(val foo: String?)

I get the exception SerializationException "Can't locate companion serializer for class class List". I’m using Kotlin version 1.1.50 and kotlinx.serialization version 0.2.

About this issue

Original URL
State: closed
Created 7 years ago
Comments: 21 (11 by maintainers)

Most upvoted comments

this one working: val map = mapOf(1 to “1”, 2 to “2”) val serial = (IntSerializer to StringSerializer).map val s = JSON.unquoted.stringify(serial, map) assertEquals(“{1:1,2:2}”,s) but not this: val map23 = mapOf(1 to mapOf(3 to “4”), 2 to mapOf(4 to “5”)) val serial = (IntSerializer to StringSerializer).map val s = JSON.stringify(serial, map23)

is it possible to serialize nested maps?

coolemza on Nov 22, 2017