Hi. How do I create viewModel scoped to a sub grap...

# koin

[Giorgi]

Hi. How do I create viewModel scoped to a sub graph in KMP project?

[Giorgi]

I have something like

@Composable
fun NavGraphBuilder.singUpFlowScreen(navController: NavHostController) {
    navigation<Screens.SignupFlow>(startDestination = Screens.SignupFlow) {
        val viewModel = koinViewModel<ProfileViewModel>()
        composable<SignupScreens.CredentialsScreen> {
            Surface(color = MaterialTheme.colorScheme.background) {
                SignupScreen(onBackClick = { navController.navigateUp() })
            }
        }
        composable<SignupScreens.OtpScreen> {
            Surface(color = MaterialTheme.colorScheme.background) {
                SignupScreen(onBackClick = { navController.navigateUp() })
            }
        }
        composable<SignupScreens.SuccessScreen> {
            Surface(color = MaterialTheme.colorScheme.background) {
                SignupScreen(onBackClick = { navController.navigateUp() })
            }
        }
    }
}

[Giorgi]

but shows error at val viewModel = koinViewModel<ProfileViewModel>()

@Composable invocations can only happen from the context of a @Composable function

[Alexis]

I think that the the viewModel should be called either within composable {} either outside of navigation<>() {} .

[Giorgi]

umm, I was looking for a way to scope ViewModel to the subgraph and share it between 4 screens...

[Giorgi]

if I do outside, then it will stay alive forever

[Alexis]

You can have other NavHost such as:
MasterNav {
• SignupNav (that'll correspond to the code that you've shared)
• Feature1Nav
}

The viewModel will then be scoped within the SignupNav.