Hi, how do we properly configure expect/actual dep...

# koin

[Ruben Quadros]

Hi, how do we properly configure expect/actual dependencies with annotations?

I have the following declarations:

expect class DatabaseDriverFactory {
    fun createDriver(): SqlDriver
}

@Factory
actual class DatabaseDriverFactory(private val context: Context) {
    actual fun createDriver(): SqlDriver {
        return AndroidSqliteDriver(
            schema = MyDb.Schema.synchronous(),
            context = context,
            name = "MyDb.db"
        )
    }
}

@Factory
actual class DatabaseDriverFactory {
    actual fun createDriver(): SqlDriver {
        return NativeSqliteDriver(
            schema = MyDb.Schema.synchronous(),
            name = "MyDb.db",
            maxReaderConnections = 4
        )
    }
}

But this fails to generate code for the native one. Under the ksp/ios* I do not see factory() { _ -> DatabaseDriverFactory() } . The error I get is:

Missing Definition type 'DatabaseDriverFactory'  for 'getDatabase'

This is my module

@Module
class CoreModule {

    @Single
    fun getDatabase(databaseDriverFactory: DatabaseDriverFactory): MyDb = MyDb.invoke(databaseDriverFactory.createDriver())
}

I'm guessing this might be because of the different constructors. What is the right way to go about this?

[Ruben Quadros]

For now I have created a wrapper to fix this:

expect class DbDriverFactoryWrapper() {
    val dbDriverFactory: DatabaseDriverFactory
}

[FlowFan]

I do it like this, need version 2.0.0-Beta2+:

// commonMain
@Module
expect object PlatformModule

// androidMain
@Module
actual object PlatformModule {
    @Single
    fun providesAppDatabaseBuilder(context: Context): RoomDatabase.Builder<AppDatabase> {
        TODO()
    }
}

// iosMain
@Module
actual object PlatformModule {
    @Single
    fun providesAppDatabaseBuilder(): RoomDatabase.Builder<AppDatabase> {
        TODO()
    }
}

[Ruben Quadros]

Thanks! I ended up doing something similar:

@Module //commonMain
expect class DatabaseModule() {
    @Factory
    fun getDatabaseFactory(): DatabaseDriverFactory
}

@Module //iosMain
actual class DatabaseModule actual constructor() {

    @Factory
    actual fun getDatabaseFactory(): DatabaseDriverFactory = DatabaseDriverFactory()
}

@Module //androidMain
actual class DatabaseModule actual constructor() {

    @Factory
    actual fun getDatabaseFactory(): DatabaseDriverFactory = DatabaseDriverFactory(getKoin().get()) //this is the context
}