IntelliJ 中混合 Java/Kotlin 多模块项目中未解决的 Kotlin 参考

Question

As title. gradle build works in command line. All tests pass. However, in IntelliJ I get unresolved reference for things like listOf() , setOf() , coerceAtMost() , etc. Basically some Kotlin native library functions.

My IntelliJ Kotlin plugin version is 1.3.72, and I force 1.3.72 in the build.gradle files. My IntelliJ version is 2020.2. I've done "Invalidate Caches/Restart" multiple times.

My project structure is as follows:

root
-- build.gradle
-- settings.gradle
-- server-root
  -- server-base
    -- src/main/java
    -- src/main/kotlin
    -- test/java
    -- test/kotlin
    -- build.gradle
  -- server-module-1
    // empty for now
  -- server-module-2
    // empty for now

My base root/settings.gradle

...
include(":server-base")
...
project(":server-base").projectDir = file('server-root/server-base')

My base root/build.gradle

plugins {
    id "io.freefair.lombok" version "5.2.1" apply false
    id "org.jetbrains.kotlin.jvm" version "1.3.72" apply false
    id "nebula.lint" version "16.9.0"
    id 'idea'
}

allprojects {
    repositories {
        mavenCentral()
    }
}

My server-root/server-base/build.gradle :

plugins {
    id 'java'
    id "io.freefair.lombok"
    id "org.jetbrains.kotlin.jvm"
}

dependencies {
    implementation project(:'server-module-1')
    ...
}

I've tried basically every StackOverflow solution I could find and still IntelliJ gives me this issue. Any suggestions?

Answer 1

I updated the Kotlin plugin to the latest: 203-1.4.21-release-IJ6682.9. (Using the IntelliJ updater, not manual download). And my IntelliJ version to 2020.3.

So even though the Kotlin plugin version doesn't the Kotlin version Gradle is setting, it works..