Hi everyone! Could someone help me? I’m getting in trouble when trying to declare a module with `App...

# koin

[amazingustav]

Hi everyone! Could someone help me? I’m getting in trouble when trying to declare a module with ApplicationContext as parameter…

That’s my class:

class Foo(environment: ApplicationEnvironment) { ... }

That’s the class which calls Foo :

class Bar(private val foo: Foo) { ... }

And that’s my KoinModuleBuilder :

object KoinModuleBuilder {
    fun modules() = listOf(module {
        single {
            Foo(get())
            Bar(get())
        }
    })
}

And finally, that’s the error: org.koin.error.NoBeanDefFoundException: No compatible definition found for type 'ApplicationEnvironment'

[aipok]

if you want to get an instance of applicationContext you should use

androidContext()

function instead of get() call. Also what is ApplicationEnvironment means? Is it your application class name? If yes, you can get instance of your application using androidApplication() method. But in this case you need to change your parameter class to Application and cast in inside your Foo class to correct name. Or make another single that will call androidApplication() as ApplicationEnvironment .

[amazingustav]

Oh no, it’s not an Android application. It is for backend. ApplicationEnvironment is a Ktor component that allows to get environment variables.

[aipok]

I assume there should be something similar for backend

[amazingustav]

I’ll keep searching for. Thank you Vitali! 😉

[aipok]

From koin-ktor module sources I don’t see any reference that could trigger me something. Might be @arnaud.giuliani could suggest something he is very kind person 😉

[arnaud.giuliani]

you need to inject ApplicationEnvironment from Ktor?

[amazingustav]

Exactly Arnaud

[arnaud.giuliani]

it’s not ready then, we need to add a dsl extension to allow you that like the ApplicationContext in android with androidContext( ... ) DSL extension

[arnaud.giuliani]

either you can define a module that handles this object instance also?

[amazingustav]

@Bruno Ortiz fyi

[amazingustav]

Folks, just to pin a simple alternative solution (thank you very much @Bruno Ortiz):

In Ktor dependencies injection class, we have installKoin(modulesAsList) . In that case, as I get Koin modules by a function, I solved that just passing environment context to it, while inside Ktor main class, like below:

// Ktor module
fun Application.module() {
    installKoin(KoinModuleBuilder.modules(this.environment))
    
    // others installations
    install { ... }
}

// Koin module builder
object KoinModuleBuilder {
    fun modules(applicationEnvironment: ApplicationEnvironment) = listOf(module {
         single { applicationEnvironment }
         ...
         ...
    })
}

Thank you Vitali and Arnaud to every help!

[arnaud.giuliani]

good workaround 👍

[arnaud.giuliani]

Would be cool to have this DSL extension also