hi @arnaud.giuliani. The 1.2.0 of koin annotation has build that breaks multiple round processing. Imo it's a critical issue that will result in compile inconsistency at some codebases, since sometimes it will work (no MRP) and sometimes it will silently omit some of the annotations (MRP). The PR for this is waiting here: https://github.com/InsertKoinIO/koin-annotations/pull/76 . Can you take a look at that?

Hi. Just starting with Koin in my ktor based backend microservice. In the Koin documentation specific to Ktor, there is a note that

"You can also start it from outside of Ktor, but you won't be compatible with autoreload feature"

. I am not using the autoreload feature and would like to instanciate koin earlier (I have some command line parsing and setup logic before I launch Ktor itself). What function should I use so that the Koin features are still available later in the ktor app?

Hey 👋 I have a question regarding Annotations and scoping. I have some modules defined like that, with a dependency that come from a specific scope. I haven’t found a way of doing it with Annotations :/ Is it possible to achieve? 🤔

val myModule = module {
    scope(named(scopeName)) {
        scoped { Foo() } 
    }

    viewModel {
        ViewModel(
            regularDeps = get(),
            foo = getScope(scopeName).get(),
        )
    }
}

How can i share a instance of a class between two composables in compose multiplatform? I cant make it single

fun ScreenOne(){
  ScreenOne()
  ScreenTwo()
}

fun SubScreenOne(){
   val viewModel : MyViewModel by inject() //same instance
}

fun SubScreenTwo(){
  val viewModel : MyViewModel by inject() // same instance
}

modules{
   factory{ MyViewModel() }
}

I walso wouldnt want to pass it through parameters, if possible

is there a nice pattern for putting qualifiers somewhere to share? i can just export

named("whatever")

as a top-level variable from a file, but it would be nice if i could like, add one to a module so that a user of a module could pull it off, like

startKoin {
  modules(listOf(
    someModule,
    module {
      single(someModule.thatParticularThing) { MakeThing() }
    }))
}

Hello everyone. I am working on migrating from Koin 2.x to 3.x Currently, on the project, there is a Fragment abstraction that handles view-binding and viewmodels. But with all the 3.x changes, it broke this BaseFragment and I am having a hard time trying to fix it, especially about shared view models across different fragments. I am attaching a snippet showing the current

BaseFragment

implementation. Let me know if you have any ideas on how to work around these issues, I would really appreciate it

Hello, Is there a way to get a callback when a Scope is closed (just before ideally)? If not, it could be convenient to clean stuff before wiping it all. Thanks!

Hello, I am using Koin annotations and here is my scenario. I have a repository in my view model. This repository accepts an injected parameter. However, when I try to pass the POJO to the view model through the

parametersOf

function, it crashes on startup. The crash displays the following message:

Caused by: org.koin.core.error.DefinitionParameterException: No value found for type 'com.example.example.example.SamplePojo'.

Is it possible to have a library with koin version minor than application? Scenario: Imagine Glide is using Koin in version 2.x. And my app is using Koin 3.x.

Why doesnt this work? The ViewModel is being instantiated every render

@Composable
fun Composable(
) {
    val coroutineScope = rememberCoroutineScope()
    val viewModel: ViewModel = koinInject { parametersOf(coroutineScope) }
}

koinInject has a remember so i dont understand why it doesnt work

@Composable
inline fun <reified T> koinInject(
    qualifier: Qualifier? = null,
    scope: Scope = LocalKoinScope.current,
    noinline parameters: ParametersDefinition? = null,
): T = rememberKoinInject(qualifier, scope, parameters)

/**
 * alias of koinInject()
 *
 * @see koinInject
 *
 * @author Arnaud Giuliani
 */
@Composable
inline fun <reified T> rememberKoinInject(
    qualifier: Qualifier? = null,
    scope: Scope = LocalKoinScope.current,
    noinline parameters: ParametersDefinition? = null,
): T = remember(qualifier, scope, parameters) {
    scope.get(qualifier, parameters)
}

Slack Conversation

Hi team, anyone face this issue where we're sharing the same viewModel and it throws an error that it couldn't create the class

override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)

        startKoin {
            androidContext(this@MainActivity)
            modules(appModule)
        }

        setContent {
            Navigation()
        }
    }
}

val appModule = module {
    single { AppwriteClient(androidContext()) }
    single<SharedPreferences> {
        androidContext().getSharedPreferences("my_app_prefs", Context.MODE_PRIVATE)
    }

    viewModel { AuthViewModel(get(), get()) }
}

Hi there, I'm running into a funny problem with a JUnit5 test, maybe someone can help. I have a class that implements 2 Interfaces:

class DokumentMemoryPersistenceAdapter: LoadDokumentPort, SaveDokumentPort {
  ....
}

a Koin module

val persistenceKoinModule = module(createdAtStart = true) {
    singleOf(::DokumentMemoryPersistenceAdapter) {
        bind<LoadDokumentPort>()
        bind<SaveDokumentPort>()
    }
}

and a test

@TestInstance(TestInstance.Lifecycle.PER_CLASS)
class DokumentPersistenceAdapterTest : KoinTest {

    private val saveDokumentPort by inject<SaveDokumentPort>()
    private val loadDokumentPort by inject<LoadDokumentPort>()

    @Test
    fun createAndLoadOkTest() {
        println("*****************************************")
        println(saveDokumentPort)
        println(loadDokumentPort)
        /*.....
	/*save a new Dokument via saveDokumentPort, reload via loadDokumentPort
	/*run assertions
    }
}

If I run only the test createAndLoadOkTest, everything works fine and I can see in stdout that both ports are provided by the same instance:

org.codeshards.aktenordner.adapter.outgoing.persistence.DokumentMemoryPersistenceAdapter@25b2cfcb
org.codeshards.aktenordner.adapter.outgoing.persistence.DokumentMemoryPersistenceAdapter@25b2cfcb

But if I run alll tests within the class, the tests fails and I can see that the ports are provided by two instances instead:

org.codeshards.aktenordner.adapter.outgoing.persistence.DokumentMemoryPersistenceAdapter@60dce7ea
org.codeshards.aktenordner.adapter.outgoing.persistence.DokumentMemoryPersistenceAdapter@662f5666

I'm not really familiar with Koin yet, but my understanding is that the declaration

_singleOf_(::DokumentMemoryPersistenceAdapter)

ensures that the component is a singleton. Is this wrong?

Me again 🙂 . I'm trying to follow these instructions to inject parameters in my objects. Since I'm not working on an Android app I tried to convert the instructions to a simple test case and came up with the following:

import org.koin.dsl.module

class Presenter(val a : String, val b : String)

val presenterModule = module {
    single { params -> Presenter(a = params.get(), b = params.get()) }
}

and

import org.junit.jupiter.api.Test
import org.junit.jupiter.api.TestInstance
import org.junit.jupiter.api.extension.RegisterExtension
import org.koin.core.component.inject
import org.koin.core.parameter.parametersOf
import org.koin.test.KoinTest
import org.koin.test.junit5.KoinTestExtension

@TestInstance(TestInstance.Lifecycle.PER_CLASS)
class KoinExploration : KoinTest {

    @JvmField
    @RegisterExtension
    @Suppress("unused")
    val koinTestExtension = KoinTestExtension.create {
        modules(
            presenterModule
        )
    }

    @Test
    fun parameterTest() {
        val a = "bar"
        val b = "foo"
        val presenter : Presenter by inject { parametersOf(a, b) }
        println("Result: ${presenter.a} ${presenter.b}")
    }
}

I expected to get "Result: bar foo" but instead I got "Result: bar bar". Can anyone shed some light here?

Hey guys! Me question is about koin + android navigation with multiple backstack. If u have implemented multiple backstack with android navigation then u know that fragment containers fully recreates when switch between them. What is your experience how to deal with it? Fragment still stay in FragmentManager that's why ViewModel do not destroyed, but if we use koin's fragmentScope, then scope closes every time we switch stack. It leads to inconsistency because koin scope recreates, and previous instances still in VM, but if we need to provide this instances more times, it creates new instances. For now, as I figured it out, possible solution is to refuse from handling fragment's lifecycle to close koin scope and handle events like onBackPressed to surely now when we will not return to this fragment. Any ideas?

Hey I am trying to use Koin Annotation in a KMM project , is that possible ?

Hi! I'm trying to prepopulate the database in the KMM project using SQLDelight and Koin for DI, on Android it’s working fine. Facing issue on the iOS side, this is driver implementation on the iOS side:

actual fun Scope.createDriver(): SqlDriver {

    val databaseName = "test.db"
    val fileManager = NSFileManager.defaultManager

    val documentsDirectory = fileManager.URLsForDirectory(NSDocumentDirectory, inDomains = NSUserDomainMask).first() as NSURL
    val destinationURL = documentsDirectory.URLByAppendingPathComponent(databaseName)

    val bundlePath = MR.assets.balagh_ul_quran.url

    if (!fileManager.fileExistsAtPath(destinationURL?.path.toString())) {
        val response = try {
            if (destinationURL != null) {
                fileManager.copyItemAtURL(bundlePath, toURL = destinationURL, error = null)
            } else {

            }
        } catch (e: Exception) {
            showLog("catch:${e.message}")
        }

        println("myLog: $response")
    }

    return NativeSqliteDriver(NoteDatabase.Schema, destinationURL?.path.toString())
}

But the app is crashing. Logs are inside the thread:

Is there an example somewhere how parameter injection for a class while at the same time an interface (that is implemented by the class o.c.) is bound to the bean. I have the class

class DokumentMemoryPersistenceAdapter
    (entries: List<Dokument>) : LoadDokumentPort, SaveDokumentPort

and the module

val persistenceKoinTestModule = module(createdAtStart = true) {

    single {
        (entries: List<Dokument>) ->
        DokumentMemoryPersistenceAdapter(entries = get { parametersOf(entries) })
    } withOptions {
        bind<LoadDokumentPort>()
        bind<SaveDokumentPort>()
    }
}

In my test I do the following

@BeforeEach
    fun beforeEach() {
        println("BeforeEach")
        val entries = emptyList<Dokument>()
        val persistenceAdapter: DokumentMemoryPersistenceAdapter by inject { parametersOf(entries) }
    }

    @Test
    fun loadDokumentOkTest() {
        val loadDokumentPort by inject<LoadDokumentPort>()

but as a result I get a message "could not create instance for DokumentMemoryPersistenceAdapter" with a root cause

Caused by: org.koin.core.error.NoParameterFoundException: Can't get injected parameter #0 from DefinitionParameters[] for type 'java.util.List'
	at app//org.koin.core.parameter.ParametersHolder.elementAt(ParametersHolder.kt:41)
	at app//org.codeshards.aktenordner.adapter.outgoing.persistence.PersistenceKoinTestModuleKt$persistenceKoinTestModule$1$1.invoke(PersistenceKoinTestModule.kt:22)
	at app//org.codeshards.aktenordner.adapter.outgoing.persistence.PersistenceKoinTestModuleKt$persistenceKoinTestModule$1$1.invoke(PersistenceKoinTestModule.kt:14)
	at app//org.koin.core.instance.InstanceFactory.create(InstanceFactory.kt:51)
	... 81 more

Lines 14 - 22 of my module happen to be the singleton declaration. I also tried to supply the parameter for the injected interfaces along the following sample

val saveDokumentPort: SaveDokumentPort by inject { parametersOf(entries) }

and got the same results. A similar test without a bind option works

class ListPresenter(val a: List<Dokument>)

val presenterModule = module {
    single {
            (a: List<Dokument>) -> ListPresenter(a = get { parametersOf(a) })
    }
}
...
    @Test
    fun listTest() {
        val a = emptyList<Dokument>()
        val listPresenter: ListPresenter by inject { parametersOf(a) }

so I guess the bind option is the problem. Any feedback would be appreciated.

How to scope a class to a specific activity in android and its equivalent view in IOS? so that when destroyed the view the class is removing from memory automatically? I know that we have

scope<Activity>{}

in android, but I couldn’t use it from the shared android code

Could someone explain when two

single {}

declarations with the same bound type will result in an override, and when will be both available for

getAll()

? Thanks.

The changelog is not updated automatically?

I see new releases from yesterday

Have you thought about BOM for koin?

I could use some help understanding why this module for a ktor client fails -

fun provideKtorClient() = HttpClient(OkHttp) {
    install(ContentNegotiation) {
        json()
    }
}

val ktorModule = module {
    single { provideKtorClient() }
}

A simple test fails with the error -

@Test
    fun checkKtorModule() {
        ktorModule.verify()
    }

org.koin.test.verify.MissingKoinDefinitionException: Missing type 'io.ktor.client.engine.HttpClientEngine' for class 'io.ktor.client.HttpClient' in definition '[Singleton:'io.ktor.client.HttpClient']'

Hey, devs. I would like to know your thoughts on testing Koin's custom context. I've set up Koin for one of our SDKs. Since it's for SDK, using a custom context is ideal. But I couldn't find any solution for the testing setup in the document. So, I came out with a solution for now. If you've faced this scenario, can you please share your solution? I really appreciate any help you can provide. Reference for Context Isolation https://insert-koin.io/docs/reference/koin-core/context-isolation/

I use the following notation with

koin-android:3.3.0

:

singleOf<AndroidPreferences> { AndroidPreferencesImpl(GlobalScope) }

When I update to

koin-android:3.4.1

this becomes a compilation error. What is the recommended migration path here?

AndroidPreferences

is an

interface

,

AndroidPreferencesImpl

is a

class

https://github.com/InsertKoinIO/koin/commit/45c3b1229bd1c35d2b1af9e735db41a6b10f2403 Hi! That fixes broke my project 🙂 Still don't understand how it used to work but it did. As I understand logic of this commit, params passing have to be exactly in the same order in which we want to get them back. Why do u think it's good solution? Why not to wrap it in a loop and compare with every param in holder?

How to test this class: class A { val b : B = get() }

Hi! I'm trying to figure out how to don't provide value at all by a some condition. F.e I have shared scope that I link to another. In my VM I have a nullable property. On one condition i want to provide value and in another one I wouldn't. I need to pass some value in the scopeю Before that I created new module every time with a function. In this func I passed my value, f.e value: T? and checked it for null. Code looks like if (value != null) scoped { smth }. Then it doesn't appears in the scope and I get null when retrieve VM as expected. But as I understand, it would be better to have one singleton module and do not create new one with a function every time. How can I solve it?

https://github.com/InsertKoinIO/koin/issues/1614 Seems

null

parameter value can't be retrieved with

get()

. I created issue for that.

What is the best way to scope view models when working with the newer jetpack compose navigation library:

navigation-compose

? In this pattern the navigation graph is defined in a

NavHost

composable that directs to other compostables (which are each a top-level screen). Accordingly, I have a view model for each screen. However, I would like to access some view model functions like "save" from the top app bar. The top app bar is defined in a scaffold, so it doesn't have access to the view model that I'm injecting as a parameter in the screen-level composable. I'm thinking that I should define a custom scope that achieves something similar to koin's built in

_by_ koinNavGraphViewModel()

?