Dagger does not support providing @AssistedInject types

[alizarei95]

I am using Hilt (v2.32-alpha) dependency injection with viewmodel. I have a class with 2 parameters, the first is context and the second is an optional string so if not provide any value this takes null. To achieve this in Hilt I read below doc: https://dagger.dev/dev-guide/assisted-injection.html

This is my code :

class SharedPreferencesHelper @AssistedInject constructor(
    context: Context,
    @Assisted sharedPreferencesName: String? = null
) { ... }

And Hilt Module :

@Module
@InstallIn(ViewModelComponent::class)
object WebServicesModule {

    @Provides
    fun provideSharedPreferencesHelper(@ApplicationContext context: Context): SharedPreferencesHelper =
        SharedPreferencesHelper(context)
}

AssistedFactory interface:

@AssistedFactory
interface MyAssistedFactory {
    fun create(sharedPreferencesName: String): SharedPreferencesHelper
}

And my viewmodel :

@HiltViewModel
class SplashViewModel @Inject constructor(
    application: Application,
    savedStateHandle: SavedStateHandle,
    private val repository: SplashRepository
) : AndroidViewModel(application) {

    @Inject
    lateinit var assistedFactory: MyAssistedFactory

fun callSplashApi() {

        val preferencesHelper = assistedFactory.create("ss")
...
  }
}

But build fails with this error:

Dagger does not support providing @AssistedInject types.

[tbroyer]

Duplicate of #2370?

[alizarei95]

@tbroyer is there any way to handle this use case at this time?

[bcorso]

@alizarei95, note that #2370 will allow you to provide a qualified @AssistedInject type, but we're still not allowing an unqualified @AssistedInject type to be provided to avoid confusion.

Thus, you'll have to provide your default type with a qualifier like, @Default.

You probably also want to provide the default via the factory rather than calling the constructor directly. For example:

@Module
@InstallIn(ViewModelComponent::class)
object WebServicesModule {
    @Provides
    @Default
    fun provideDefault(factory: MyAssistedFactory) = factory.create()
}

@AssistedFactory
interface MyAssistedFactory {
  fun create(sharedPreferencesName: String ?= null): SharedPreferencesHelper
}

**Also, note that the fix for #2370 is not yet included in a release. It should be out with the next Dagger release, 2.33.

[alizarei95]

@bcorso Thanks
I wrote your codes but again I got error:
Dagger does not support providing @AssistedInject types.

Is my case is an unusual scenario? This is a little bit strange for me there is not a simple solution

[bcorso]

@alizarei95 see the last part of my previous comment:

note that the fix for #2370 is not yet included in a release. It should be out with the next Dagger release, 2.33.

[alizarei95]

@bcorso what about last part of my previous question?

Is my case is an unusual scenario? This is a little bit strange for me there is not a simple solution

[beigirad]

@bcorso Do you have any time estimation for releasing 2.33?
I have the same issue.

[beigirad]

@alizarei95

is there any way to handle this use case at this time?

You can use Square's AssistedInject for assisting inject at this time. And when 2.33 is out you change just annotations (May need to remove some lines)

[bcorso]

@beigirad we're should have a release out within the next week or two

[bcorso]

Closing this as a dupe of #2370