Hello everyone, I have a beginner question _(I am ...

# koin

[JAYSH89]

Hello everyone, I have a beginner question (I am new to Koin).

I was reading the docs specifically on naming:

val myModule = module {
    single<Service>(named("default")) { ServiceImpl() }
    single<Service>(named("different")) { ServiceImpl() }
}

val service : Service by inject(qualifier = named("default"))

Now I was wondering how would I do this for constructor injection?
I am not using any of the annotation (KSP) features.

Desired outcome something like:

module { singleOf(::SomeClass) }

class SomeClass(private val defaultService: Service, private val differentService: Service) {}

[Alexandru Caraus]

Better have separate modules with defaults and specific modules for test

[Alexandru Caraus]

Then you dont need so many named qualifiers

[Alexandru Caraus]

If there is one dependency of a type its the default one, doesnt need the qualifier.

[Alexandru Caraus]

So keep the app module with defaults

[Alexandru Caraus]

Then in test start koin with modules from the app and modules created in test for yor specific test, you can combine them nicely

[Alexandru Caraus]

I do it like that and it works well

[Alexandru Caraus]

And its pretty flexible

[JAYSH89]

This was the example from the tutorial, I wasn't very clear but, testing doesn't have anything to do with it, I want the different impls of the same class injected.

I updated my original question for more clarity

[JAYSH89]

For example in Spring Boot I would do something like:

class SomeClass(
    @Qualifier("default") private val default: Service,
    @Qualifier("different") private val different: Service,
) {}

or in Android + Dagger/Hilt

@Qualifier
annotation class default

@Qualifier
annotation class different

class SomeClass(
    @default private val default: Service,
    @different private val different: Service,
) {}

[JAYSH89]

If anyone reads this I found this that solved it for me:

https://github.com/InsertKoinIO/koin/issues/109

[withoutclass]

Don’t use strings, you’re setting yourself up for turbo-pain

[withoutclass]

Use enums or sealed classes instead