Hello Facing issue with koin scoped instance in iO...

# koin

[Farhazul Mullick]

Hello Facing issue with koin scoped instance in iOS. Can anyone help me out?

actual inline fun <reified T : ViewModel, reified S> Module.viewModelScopedDefinition(
    qualifier: Qualifier?,
    noinline definition: Definition<T>,
){
    scope<S> {
        scoped(qualifier = qualifier, definition = definition)
    }
}

 module {
    viewModelScopedDefinition<ParentAuthViewModel, ParentAuthScope> {
    ParentAuthViewModel(
        parentGetOtpUseCase = get(),
        ......
    )
}
}

class ParentAuthScope private constructor(): KoinScopeComponent{
    override val scope: Scope by getOrCreateScope()

    companion object: BaseScope<ParentAuthScope>() {
        /**
         * Create a new ParentAuthScope instance.
         */
        override fun newInstance(): ParentAuthScope = run {
            val instance = ParentAuthScope()
            INSTANCE = instance
            instance
        }
    }
    fun close() {
        if (scope.isNotClosed())
        scope.close()
    }
}

abstract class BaseScope<T: KoinScopeComponent> {
    protected var INSTANCE: T? = null
    fun instantiate(): T {
        return if (INSTANCE != null) {
            /**
             * This scope reference is a container in which koin puts all the objects.
             * This objects can be accessed via ex: [childAuthScope.scope.get<ChildAuthScope>()].
             * If this container is closed i.e scope.close() is called and we are still trying to access
             * objects using this scope then koin throws [ClosedScopeException].
             * So we are creating a new reference of this class which will eventually create new scope-container.
             * **/
            if (INSTANCE?.scope?.closed == true) {
                newInstance()
            } else {
                INSTANCE!!
            }
        }
        else {
            /** Create a new scope **/
            newInstance()
        }
    }

    protected abstract fun newInstance(): T
}

val viewModel = _remember_ *{* ParentAuthScope.instantiate().scope.get<ParentAuthViewModel>() *}*

This is throwing an exception when i run iOS build can anyone help? This what my stack-trace looks like

org.koin.core.error.InstanceCreationException 

Could not create instance for '[Scoped:'packageName.ParentAuthViewModel',scope:q:'packageName.commonauth.di.ParentAuthScope']' Uncaught Kotlin exception: org.koin.core.error.InstanceCreationException: Could not create instance for '[Scoped:'packageName.viewmodel.ParentAuthViewModel',scope:q:'packageName.ParentAuthScope']'
    at 0   shared                              0x1092be273        kfun:kotlin.Exception#<init>(kotlin.String?;kotlin.Throwable?){} + 143 
    at 1   shared                              0x109d6e523        kfun:org.koin.core.error.InstanceCreationException#<init>(kotlin.String;kotlin.Exception){} + 143 
    at 2   shared                              0x109d6fd47        kfun:org.koin.core.instance.InstanceFactory#create(org.koin.core.instance.InstanceContext){}1:0 + 1623 
    at 3   shared                              0x109d70a9b        kfun:org.koin.core.instance.ScopedInstanceFactory#create(org.koin.core.instance.InstanceContext){}1:0 + 495 
    at 4   shared                              0x109d7157b        kfun:org.koin.core.instance.ScopedInstanceFactory.get$lambda$0#internal + 375 
    at 5   shared                              0x109d7163f        kfun:org.koin.core.instance.ScopedInstanceFactory.$get$lambda$0$FUNCTION_REFERENCE$0.invoke#internal + 95 
    at 6   shared                              0x109d71763        kfun:org.koin.core.instance.ScopedInstanceFactory.$get$lambda$0$FUNCTION_REFERENCE$0.$<bridge-UNN>invoke(){}#internal + 91 
    at 7   shared                              0x10a34c08f        kfun:kotlin.Function0#invoke(){}1:0-trampoline + 99 
    at 8   shared                              0x109d85233        kfun:org.koin.mp.KoinPlatformTools#synchronized(org.koin.mp.Lockable;kotlin.Function0<0:0>){0§<kotlin.Any?>}0:0 + 391 
    at 9   shared                              0x109d71123        kfun:org.koin.core.instance.ScopedInstanceFactory#get(org.koin.core.instance.InstanceContext){}1:0 + 1095 
    at 10  shared                              0x10a3ed51b        kfun:org.koin.core.instance.InstanceFactory#get(org.koin.core.instance.InstanceContext){}1:0-trampoline + 67 
    at 11  shared                              0x109d793f3        kfun:org.koin.core.registry.InstanceRegistry#resolveInstance(org.koin.core.qualifier.Qualifier?;kotlin.reflect.KClass<*>;org.koin.core.qualifier.Qualifier;org.koin.core.instance.InstanceContext){0§<kotlin.Any?>}0:0? + 363 
    at 12  shared                              0x109d7f2ff        kfun:org.koin.core.scope.Scope.resolveValue#internal + 855 
    at 13  shared                              0x109d7eec7        kfun:org.koin.core.scope.Scope.resolveInstance#internal + 1519

[Jacob Ras]

Did you figure this out? I wonder if there's a more specific error further down the stack trace. Seems a bit vague how it just reports "could not create instance" without telling why.

[Farhazul Mullick]

I even checked the source code. This is the fn. Looks like to me it is crashing in the definition .invoke() but it doesnot give reason why couldn't instantiate.

open fun create(context: InstanceContext): T {
    context.logger.debug("| (+) '$beanDefinition'")
    try {
        val parameters: ParametersHolder = context.parameters ?: emptyParametersHolder()
        return beanDefinition.definition.invoke(
            context.scope,
            parameters,
        )
    } catch (e: Exception) {
        val stack = KoinPlatformTools.getStackTrace(e)
        context.logger.error("* Instance creation error : could not create instance for '$beanDefinition': $stack")
        throw InstanceCreationException("Could not create instance for '$beanDefinition'", e)
    }
}