kotlinlang #serialization

@Serializable
data class ServiceImpl(
  override val id: String,
  override var name: String = id.capitalize(Locale.ROOT),
  override var logoUrl: String? = null,
  override var logoHasText: Boolean = false,
  override var brandColor: Int = "#FFFFFF".toColor(),
  override var brandAccentColor: Int = "#3F51B5".toColor(),
  override var country: Country = Countries.findByCountryCode(Locale.ROOT.language) ?: <http://Countries.NG|Countries.NG>,
  override var actions: ActionContainerImpl = ActionContainerImpl(),
) : Service

Error

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Failed to generate expression: KtNameReferenceExpression
Caused by: java.lang.UnsupportedOperationException: Don't know how to generate outer expression: Class: class ServiceImpl

Daniele B

08/07/2020, 4:17 PM

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@Serializable
data class ApiResponse(
    @SerialName("data") val data : List<Row>,
    @SerialName("err") val error : String,
)

Daniele B

08/07/2020, 4:17 PM

is it possible to specify that a field is optional?

Nikky

08/09/2020, 7:23 PM

first time doing stuff with serialization on native targets with kotlin-multiplatform my code is only in common though.. i am running into this: https://gist.github.com/NikkyAI/9caf3f66ae51b79db868b7d87c7addf7 how do i figure out what makes this break ? i opened a issue: https://github.com/Kotlin/kotlinx.serialization/issues/962

Karlo Lozovina

08/13/2020, 2:02 PM

when exactly does polymorphic serialization kick in? I have a bunch of class hierarchy and everything worked fine until I added one new class - and now it says that some other class is not registered for polymorphic serialization...

ursus

08/17/2020, 3:43 AM

basically compiler plugin vs kapt

Vsevolod Tolstopyatov [JB]

08/17/2020, 6:09 PM

📣 📣 📣 I am happy to announce kotlinx.serialization

1.0.0-RC

release! The library overcame quite a few changes during the last releases. We carefully revisited each public declaration and in 1.0.0-RC we finally reached the stable ground and stabilized most of the essential API. This is a serious milestone and it wouldn’t be possible without you, the community ❤️ Thanks to all of you for the feedback, questions, concerns, slack discussions and fearless adoption of the unstable library! Short overview: https://kotlinlang.org/docs/reference/serialization.html Changelog: https://github.com/Kotlin/kotlinx.serialization/releases/tag/1.0.0-RC Serialization guide by example: https://github.com/Kotlin/kotlinx.serialization/blob/master/docs/serialization-guide.md

🎉 22

andylamax

08/17/2020, 10:51 PM

kotlinx.serialization

looks so ready. If it were up to me, This would have been a

1.0.0

but maybe that's why @Vsevolod Tolstopyatov [JB] is at JB and I am at home. Nice work to all contributors. You have nailed this one

Nicolas Bourdin

08/18/2020, 11:17 AM

Hello there, I update my kotlin version to 1.4.0 and followed the migration guide for the kotlin serialization plugin (https://github.com/Kotlin/kotlinx.serialization/blob/1.0.0-RC/docs/migration.md) But when I launch my app I got the following error in runtime on a « @Serializable » class

Your current kotlinx.serialization core version is too low, while current Kotlin compiler plugin 1.4.0 requires at least 1.0-M1-SNAPSHOT. Please update your kotlinx.serialization runtime dependency.

Any idea please ? Thanks in advance

Nikky

08/18/2020, 4:28 PM

is there a annotation i can put on a field to signal that this field should always serialize even when it has a default value ?

TwoClocks

08/18/2020, 6:49 PM

is there any way to control where cbor serializes to? Or do I just have to copy it?

Robert Jaros

08/18/2020, 8:31 PM

Are there any known issues with serialization and new Kotlin/JS IR backend?

agu

08/18/2020, 9:13 PM

Hi everyone, I don't really like that serializing a nullable which is null, returns null in json. I would love to ignore the field completely. Using

encodeDefaults = false

it's not an option. Is there a workaround? If not (else haha), what library would you recommend (that DOESN'T use reflection)?

andylamax

08/19/2020, 1:10 AM

In addition to https://kotlinlang.slack.com/archives/C7A1U5PTM/p1597737420036300 I think the

Long

data type, just for safety sake, should by default be serialized as string. Because when you decided to use a

Long

you are certain of operating beyond the realms of a normal

Int

🚫 2

rrva

08/19/2020, 12:34 PM

I am getting

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Your current kotlinx.serialization core version is too low, while current Kotlin compiler plugin 1.4.0 requires at least 1.0-M1-SNAPSHOT. Please update your kotlinx.serialization runtime dependency

My build.gradle:

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dependencies {

implementation "org.jetbrains.kotlinx:kotlinx-serialization-core:1.0.0-RC"

}

and

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plugins {
    id 'org.jetbrains.kotlin.jvm' version '1.4.0'
    id 'org.jetbrains.kotlin.plugin.serialization' version '1.4.0'
}

rrva

08/19/2020, 12:35 PM

ah maybe ktor-client dependency

Andrei Marshalov

08/21/2020, 9:39 AM

Hi, I’m trying to use

kotlinx.serialization

for my Kotlin/MPP project with

Android

iOS

and

macOS

targets. I’ve implemented this example and got an error

kotlinx.serialization.SerializationException: Serializer for class 'Project' is not found

for all Native targets, on Android it works fine. I created an issue on github, but it’ll take some time before it will be responded, so I’m wondering if any have the same problem and can share any workaround. Thank you!

Luoqiaoyou

08/23/2020, 3:52 AM

I write some extension functon for JsonObject to reduce the effort of migration. if a Java JSONObject change to MPP JsonObject, i only need to change the create logic. The extension like this in Kotlin 1.3.72:

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fun JsonObject.put(key: String, value: Long) {
    (content as MutableMap).put(key, JsonPrimitive(value))
}

but in Kotlin 1.4.0,

content

is private

Michael

08/25/2020, 12:27 PM

hey

Michael

08/25/2020, 12:28 PM

how could I deseroalize such a class

Michael

08/25/2020, 12:28 PM

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data class RestResponse<T>(val data: T, val meta: Metadata)

Michael

08/25/2020, 12:29 PM

because when just using @Serializable it tells me to put the annotation on top of the class

Karlo Lozovina

08/25/2020, 12:56 PM

Can something like this: https://pl.kotl.in/1lPjw5k7W be made to work? I'd like to have classes inherit from

Command

but keep the single

encode

function?

Karlo Lozovina

08/25/2020, 12:56 PM

don't know how to make the playground import kotlinx.serialization 😕

rrva

08/28/2020, 9:19 AM

do I need to downgrade kotlin plugin in IntelliJ to work with kotlin 1.3 and older serialization versions?

Chris Fillmore

09/01/2020, 12:18 AM

or are private properties ignored?

spand

09/03/2020, 6:50 AM

Is there a format that is more graph based rather than treebased like JSON ? (mostly to avoid serializing the same object multiple times and save on size)