Hi. I have a Room DB and DAO, which return flow. Dao function accepts as a parameter ID of the Rout...

# android

[Reyst]

Hi.

I have a Room DB and DAO, which return flow. Dao function accepts as a parameter ID of the Route-object.
The ViewModel contains a StateFlow with the current route.

Task is:
1. At current route changes must be updated parameters of DB-observing
2. At DB changes must be updated UI
I've tried next construction, but it is not working, i don't receive DB-updates

val routeStatusFlow = coordinator.sharedState
        .map { it.currentRoute }
        .distinctUntilChanged()
        .flatMapLatest {
            if (it != null) {
                combine(
                    tasksRepository.getTasksSummaryFlow(it.id, START_IDENT),
                    tasksRepository.getTasksSummaryFlow(it.id, END_IDENT),
                ) { start, end -> RouteStatusViewState(it.status, start, end) }
            } else flowOf(RouteStatusViewState())
        }
        .stateIn(
            scope = viewModelScope,
            started = SharingStarted.WhileSubscribed(LIFECYCLE_TIMEOUT_MS),
            initialValue = RouteStatusViewState(),
        )

What an I doing wrong?

[Chrimaeon]

Image from iOS.jpg

[Reyst]

Ok, no problem.
It was a question about Kotlin Flows, but ok.
The problem was found out

[Chrimaeon]

Next time when having issue with flow, you should ask in #C1CFAFJSK .

[Nitesh Singh]

i didn't understand about construction