Does anyone know, why following navigation is giving me `java.lang.IllegalArgumentException: navigat...

# compose

[Peter Mandeljc]

Does anyone know, why following navigation is giving me java.lang.IllegalArgumentException: navigation destination files is not a direct child of this NavGraph exception?
If I remove optional arguments, it works ok.

NavHost(
    navController = controller,
    startDestination = "files"
) {
    composable(
        route = "files?import_file={import_file}",
        arguments = listOf(navArgument("import_file") { defaultValue = false })
    ) { backStack ->
        FilesScreen(
            openImportDrawer = backStack.arguments?.getBoolean("import_file") ?: false,
        )
    }
}

[Ian Lake]

The route strings (the startDestination and the route) need to match character by character, so you need to use startDestination = "files?import_file={import_file}"

[Peter Mandeljc]

I see, thanks. I thought it would work, since route argument is optional. Would it make sense to suggest this use case as a feature request?

[Ian Lake]

No, the startDestination is a route pattern, it isn't how you pass arguments (e.g., startDestination = "files?import_file=true" is also not expected to work - to do that, you'd set the defaultValue). There's no plans on changing that