I have a strange issue. ViewModel get data from db with a viewModelScope... after update a list in m...

# compose

[Gioele Dev]

I have a strange issue. ViewModel get data from db with a viewModelScope... after update a list in my uiStage model.. is a MutableStateFlow... when i put a brakpoint i see change while without brakpoint ui doesn/t change.

[Gioele Dev]

viewModelScope.launch {
    var confirmedList = getItemsConfirmedByScodeUseCase.invoke()

    var groups = confirmedList.groupBy { it }
    var modules = uiState.value.modules
    modules.forEach {
        it.badge = ""
    }
    groups.forEach { op, list ->
        modules.forEach {
            if (it.operationId == op) {
                it.badge = list.size.toString()
            }
        }
    }
    uiState.value = uiState.value.copy(
        modules = modules
    )
}

[Gioele Dev]

modules is a list inside my

val uiState = MutableStateFlow<DashboardState>(DashboardState(false))

[Ian Lake]

It looks like you are just editing the list items in place, rather than creating a new list instance with your updated data. Your copy() isn't actually doing anything useful here since uiState.value.modules is being changed out from underneath it, meaning your previous emission and new emission are .equals() to one another, which is why you don't get any state change in Compose

[Ian Lake]

Generally, you'll want to avoid mutable items and mutable lists entirely when using StateFlow

[Gioele Dev]

thanks

[Gioele Dev]

i moved calculate badges before create Module list so.. i avoid use "`uiState.value.modules`"