IssueTracker

Can you share your Gradle build file and how room-compiler is being setup? The error is indicating that the Room processor likely did not run which in turns means the generated implementation of the database was not created and can't be found.

This is my gradle file. I need to re -explain it runs well in Android, iOS, and Desktop's debug.It only crash when runRelease on desktop.

import org.jetbrains.compose.desktop.application.dsl.TargetFormat
import org.jetbrains.kotlin.gradle.dsl.JvmTarget
import org.jetbrains.kotlin.gradle.tasks.KotlinCompilationTask

plugins {
    alias(libs.plugins.kotlinMultiplatform)
    alias(libs.plugins.androidApplication)
    alias(libs.plugins.composeMultiplatform)
    alias(libs.plugins.composeCompiler)
    alias(libs.plugins.kotlinCocoapods)
    alias(libs.plugins.googleKsp)
    alias(libs.plugins.kotlinSerialization)
    alias(libs.plugins.androidxRoom)
}

kotlin {
    androidTarget {
        compilerOptions {
            jvmTarget.set(JvmTarget.JVM_11)
        }
    }

    iosX64()
    iosArm64()
    iosSimulatorArm64()

    cocoapods {
        summary = "Some description for the Shared Module"
        homepage = "Link to the Shared Module homepage"
        version = "1.0"
        ios.deploymentTarget = "13.0"
        podfile = project.file("../iosApp/Podfile")
        framework {
            baseName = "ComposeApp"
            isStatic = true
        }
    }

    jvm("desktop")

    sourceSets {
        val desktopMain by getting

        androidMain.dependencies {
            implementation(compose.preview)
            implementation(libs.androidx.activity.compose)
        }
        commonMain.dependencies {
            implementation(compose.runtime)
            implementation(compose.foundation)
            implementation(compose.material3)
            implementation(compose.ui)
            implementation(compose.components.resources)
            implementation(compose.components.uiToolingPreview)
            implementation(libs.androidx.lifecycle.viewmodel)
            implementation(libs.androidx.lifecycle.runtime.compose)
            implementation(libs.androidx.navigation)

            // Serialization
            implementation(libs.kotlinx.serialization.json)

            // Room
            implementation(libs.androidx.room.runtime)
            implementation(libs.androidx.sqlite.bundled)
        }
        desktopMain.dependencies {
            implementation(compose.desktop.currentOs)
            implementation(libs.kotlinx.coroutines.swing)
        }
    }
}

android {
    namespace = "xxx"
    compileSdk = libs.versions.android.compileSdk.get().toInt()

    defaultConfig {
        applicationId = "xxx"
        minSdk = libs.versions.android.minSdk.get().toInt()
        targetSdk = libs.versions.android.targetSdk.get().toInt()
        versionCode = 1
        versionName = "1.0"
    }
    packaging {
        resources {
            excludes += "/META-INF/{AL2.0,LGPL2.1}"
        }
    }
    buildTypes {
        getByName("release") {
            isMinifyEnabled = false
        }
    }
    compileOptions {
        sourceCompatibility = JavaVersion.VERSION_11
        targetCompatibility = JavaVersion.VERSION_11
    }
}

dependencies {
    debugImplementation(compose.uiTooling)
}

compose.desktop {
    application {
        mainClass = "xxx.MainKt"

        nativeDistributions {
            targetFormats(TargetFormat.Dmg, TargetFormat.Msi, TargetFormat.Deb)
            packageName = "xxx"
            packageVersion = "1.0.0"
        }
    }
}

dependencies {
    kspCommonMainMetadata(libs.koin.ksp.compiler)
    listOf(
        "kspAndroid",
        "kspDesktop",
        "kspIosX64",
        "kspIosArm64",
        "kspIosSimulatorArm64"
    ).forEach {
        add(it, libs.androidx.room.compiler)
    }
}

project.tasks.withType(KotlinCompilationTask::class.java).configureEach {
    if (name != "kspCommonMainKotlinMetadata") {
        dependsOn("kspCommonMainKotlinMetadata")
    }
}

kotlin.sourceSets.commonMain {
    kotlin.srcDir("build/generated/ksp/metadata/commonMain/kotlin")
}

room {
    schemaDirectory("$projectDir/schemas")
}

Does release have some type of obfuscation? The generated database file is found via reflection and if the class is renamed due to obfuscation, that could be a cause. For Android room-runtime ships with proguard rules to solve this but we don't include them in the JVM artifacts (we probably should).

Also, one thing in the build file is you seem to have an outdated workaround where Room is applied to the common source set and a manual dependency to the KSP generated in metadata is added, those workarounds should be removed if using the latest version. Specifically the lines:

// in dependencies
kspCommonMainMetadata(libs.koin.ksp.compiler)

project.tasks.withType(KotlinCompilationTask::class.java).configureEach {
    if (name != "kspCommonMainKotlinMetadata") {
        dependsOn("kspCommonMainKotlinMetadata")
    }
}

kotlin.sourceSets.commonMain {
    kotlin.srcDir("build/generated/ksp/metadata/commonMain/kotlin")
}

I'm not sure if it'll solve your issue but wanted to call them out.