Do we have some thing similar to switch map for mutable state flow . I want to trigger network calls...

# compose

[Chethan]

Do we have some thing similar to switch map for mutable state flow . I want to trigger network calls only some values changes ?

[Scott]

I believe flatMapLatest is what you're looking for. https://kotlin.github.io/kotlinx.coroutines/kotlinx-coroutines-core/kotlinx.coroutines.flow/flat-map-latest.html

[Chethan]

It is not serving my purpose, flatMapLatest calls every time when I come back to list fragment from detail fragment although there is no value change in _requestParams

val pendingReviewList: Flow<PagingData<PendingReview>> =
    _requestParams.flatMapLatest {
        Timber.i("Current value : $it")
        providerRepository.getPendingReviewList(limit = 10).cachedIn(viewModelScope)
    }

but this is not happening in case Mutable live data

val posts = _requestParams.switchMap {
    repository.getGuestPostedReviews().cachedIn(viewModelScope).asLiveData()
}

[Chethan]

I fixed this with below code

private val _refreshCall = MutableLiveData<Boolean>(false)


    val pendingReviewList: Flow<PagingData<PendingReview>> =
        _refreshCall.switchMap {
            providerRepository.getPendingReviewList(limit = 10).cachedIn(viewModelScope)
                .asLiveData()
        }.asFlow()


    fun refresh() {
        _refreshCall.value?.let {
            _refreshCall.value = !it
        }
    }