v0.9.1 SerializationException: Can't locate argument-less serializer

[hannpet]

@Serializable
data class Data(var txt: String)

@UseExperimental(ImplicitReflectionSerializer::class)
fun main() {
    val myData = Data("Blah blah")

    val js = JSON.unquoted.stringify(myData)
    println(js)
}

will throw

Exception in thread "main" kotlinx.serialization.SerializationException: Can't locate argument-less serializer for class MainKt$main$Data. For generic classes, such as lists, please provide serializer explicitly.
	at kotlinx.serialization.PlatformUtilsKt.serializer(PlatformUtils.kt:28)
	at kotlinx.serialization.context.ContextKt.getOrDefault(Context.kt:39)
	at MainKt.main(Main.kt:15)
	at MainKt.main(Main.kt)

I'm on version 0.9.1 which fixed Bug #250. I'm a bit confused now, because it seems like the same Bug is popping up on me now. Did I miss something here?

[sandwwraith]

This issue seems unrelated to 250 and is more likely caused by non-applied plugin or another problems with your project setup

[MaxElkin]

This issue seems unrelated to 250 and is more likely caused by non-applied plugin or another problems with your project setup

Exactly.

I fixed this issue after fix of plugin application. Now it's placed in root build.gradle.kts in plugins { ... } block

[markusmoormann]

@sandwwraith is this currenlty supposed to work without delegating to gradle? I'm using IntelliJ IDEA 2018.3.1
Build #IU-183.4588.61, built on December 4, 2018
Kotlin Plugin Version is: 1.3.11-release-IJ2018.3-1
I still get this error in IDEA

[sandwwraith]

@markusmoormann If setup in Gradle is incorrect, it would not be correctly imported to IDEA, and therefore this error would emerge both in Gradle and IDEA builds.

[markusmoormann]

I've imported the example-jvm project. Once with maven, once with gradle, non of them worked.
What do you mean with "if setup in gradle is incorrect"? I've just installed gradle and created a really simple maven project according to quick example. Data.serializer() still brings up Error:(17, 31) Kotlin: Unresolved reference: serializer

[sandwwraith]

So you're using Gradle or Maven? For Maven, I can confirm that there is an import problem: #307

[markusmoormann]

@sandwwraith I'm using maven. At least I can confirm that importing the example-jvm und fiddling around with the respositories I can compile and start the app in IDEA

[cvelinciuc]

I'm using Gradle and I get the same exception when I try to JSON.stringify a Map of <String, Any>. Yet it works with Map<String, SomeClass>

[sandwwraith]

@msacras You can't just serialize Any without any reflection or polymorphism. You need either specify concrete serializer for it or try to use PolymorphicSerializer (but #101)

[mochadwi]

This issue seems unrelated to 250 and is more likely caused by non-applied plugin or another problems with your project setup

Exactly.

I fixed this issue after fix of plugin application. Now it's placed in root build.gradle.kts in plugins { ... } block

how do we setup this in our android project?

[mochadwi]

This issue seems unrelated to 250 and is more likely caused by non-applied plugin or another problems with your project setup

Exactly.
I fixed this issue after fix of plugin application. Now it's placed in root build.gradle.kts in plugins { ... } block

how do we setup this in our android project?

Looks like here's how to solve it:

1. using plugins https://github.com/Kotlin/kotlinx.serialization#gradle-with-plugins-block
2. or gradle https://github.com/Kotlin/kotlinx.serialization#gradle

[sandwwraith]

If you have any questions left, feel free to reopen.