Hello I'm looking for some guidance while migratin...

# koin

[Kamil K]

Hello I'm looking for some guidance while migrating koin v2 to v3.

Also moving to kotlin 1.8.10 and want to integrate new features with compose

"org.koin:koin-core:2.0.1"
"org.koin:koin-android:2.0.1"
"org.koin:koin-test:2.0.1"
"org.koin:koin-androidx-viewmodel:2.0.1"
"org.koin:koin-androidx-ext:2.0.1"

Will be replaced by

val koinVersion = "3.0.1"
"io.insert-koin:koin-core-jvm:$koinVersion"
"io.insert-koin:koin-test:$koinVersion"
"io.insert-koin:koin-android:$koinVersion"

And following cases to rework

Properties - properties(map<String, String>)
This has changed from accepting Map<String, Any> to Map<String, String> but saving property still takes Any and there is getProperty<T>(): T .
So is this just leftovers API's and it's discouraged to save other types than String or there this method has been renamed and I can't find it?

I can solve it with extension function but I want to know if there is something existing.

@OptIn(KoinInternalApi::class)
fun KoinApplication.anyProperties(values: Map<String, Any>): KoinApplication {
    koin.propertyRegistry.saveProperties(values)
    return this
}

SharedViewModels
How do I get sharedVm from Activity now?
Used to be val viewModel by lazy { getSharedViewModel<AnViewModel>(from = { requireActivity() }) }
Should it be now private val viewModel by activityViewModels<AnViewModel>() ?

I saw issue https://github.com/InsertKoinIO/koin/issues/785 that from is renamed to owner but this is not available for fragment.

BeenRegistry - getDefinition()

Got a singleton class in which I insatiate a viewModel

val koinApplication = GlobalContext.get()
anViewModel = koinApplication.koin.getByClassName(AnManagerViewModel::class)

private inline fun <reified T> Koin.getByClassName(className : KClass<*>) : T? {
        val definition = this.rootScope.beanRegistry.getDefinition(className)
        if(definition != null){
            return this.get<T>(definition.qualifier)
        }
        return null
    }

How can I achieve it in koin v3?

Can I get the definition by getScope(ScopeDefinition.ROOT_SCOPE_ID)._scopeDefinition.definitions.find { it.qualifier?.value == className.qualifiedName }
?

Thanks for help!

[arnaud.giuliani]

Hey will help you about that 👍 let me get some time to check all your topics

[Kamil K]

thanks!

[arnaud.giuliani]

I would even encourage to go with latest 3.3.2 or 3.4.3 ... as you will have latest fixes & API updates. There were some API renamign to be conform to core Android API

[arnaud.giuliani]

this will solve consistency in properties API

[arnaud.giuliani]

`sharedViewModel`has been named to activityViewModel

[arnaud.giuliani]

To retrieve an instance with a given KClass, use:

fun <T> get(
        clazz: KClass<*>,
        qualifier: Qualifier? = null,
        parameters: ParametersDefinition? = null
    )

[arnaud.giuliani]

koin.get(yourClass)

[arnaud.giuliani]

getScope(ScopeDefinition.ROOT_SCOPE_ID)._scopeDefinition.definitions.find { it.qualifier?.value == className.qualifiedName }

seems that you try to resolve a definition, with qualifier used in className

[arnaud.giuliani]

all from root

[arnaud.giuliani]

Really hard use of internals here 😕