kotlinx-serialization @Serializable 未应用于模块

Question

Serializable我在数据类上有一个简单的用法

@Serializable
data class Message(
    val type: String,
    val topics: List<String>,
    val content: String
)

但IDE显示以下警告

kotlinx.serialization compiler plugin is not applied to the module, so this annotation would not be processed. Make sure that you've setup your buildscript correctly and re-import project.

在运行时我收到

Serializer for class 'Message' is not found.
Please ensure that class is marked as '@Serializable' and that the serialization compiler plugin is applied.

我读过无数其他 StackOverflow 帖子，其中的问题是其设置不正确build.gradle.kts，但我仔细检查了我是否正在导入插件和依赖项。下面是我的build.gradle.kts

val ktor_version: String by project
val kotlin_version: String by project
val logback_version: String by project

plugins {
    kotlin("jvm") version "1.9.0"
    kotlin("plugin.serialization") version "1.9.0"
    id("io.ktor.plugin") version "2.3.2"
}

group = "com.ryandyoon"
version = "0.0.1"
application {
    mainClass.set("com.ryandyoon.ApplicationKt")

    val isDevelopment: Boolean = project.ext.has("development")
    applicationDefaultJvmArgs = listOf("-Dio.ktor.development=$isDevelopment")
}

repositories {
    mavenCentral()
}

dependencies {
    implementation("org.jetbrains.kotlinx:kotlinx-serialization-json:1.5.1")
    implementation("io.ktor:ktor-server-core-jvm:$ktor_version")
    implementation("io.ktor:ktor-server-netty-jvm:$ktor_version")
    implementation("io.ktor:ktor-server-websockets:$ktor_version")
    implementation("ch.qos.logback:logback-classic:$logback_version")
    testImplementation("io.ktor:ktor-server-tests-jvm:$ktor_version")
    testImplementation("org.jetbrains.kotlin:kotlin-test-junit:$kotlin_version")
}

如果它有影响的话，是的，我在 ktor 项目中使用它，但我只是简单地调用

Json.decodeFromString<Message>(messageString)

Answer 1

我能够解决警告“kotlinx.serialization 编译器插件未应用于模块，因此不会处理此注释。请确保您已正确设置构建脚本并重新导入项目。” 通过在项目级 build.gradle.kts中添加序列化插件，然后在模块级 build.gradle.kts 中应用它。

项目build.gradle.kts：

plugins {
    ...    
    kotlin("plugin.serialization") version "1.9.0" apply false
}

模块build.gradle.kts：

plugins {
    ...
    kotlin("plugin.serialization")
}
...
dependencies {
    ...
    implementation("org.jetbrains.kotlinx:kotlinx-serialization-json:1.6.0")
}