How to switch flow based on condition? - kotlin

Question

There is query and two filters. When set search filter and query is not empty, need to one flow. When set checked filter need to other flow.
According debug, onClickSearchFilter or onClickCheckedFilter calls with query or filter changed - return new flow. But in UI no changes, collector dont work second time.
How to switch flow based on condition?
When I debugging with breakpoints in flows, app crash every time A/libc: Fatal signal 11 (SIGSEGV), code 1, fault addr 0x14 in tid 23174 (JDWP), pid 23167 . Rebuild, clear cache, reload device - dont' help.
repeatOnStarted(viewModel.itemsFlow) {
// it doesn't work when flow is switched
pagingAdapter.submitData(it)
}
val itemsFlow = queryFlow
.debounce(1000)
.combine(filterFlow) { query, filter ->
when (filter) {
R.id.search_result_chip -> onClickSearchFilter(query)
R.id.checked_chip -> onClickCheckedFilter()
else -> throw Exception("")
}
}.flatMapMerge { // in order to switch from Flow<Flow<*>> to Flow<*>
it
}
private fun onClickSearchFilter(query: String): Flow<PagingData<ItemEntity>> {
return if (query.length < 2)
emptyFlow()
else Pager(BasePagingSource.getConfig()) {
SearchPagingSource(query, client)
}.flow.cachedIn(viewModelScope)
}
private fun onClickCheckedFilter(): Flow<PagingData<ItemEntity>> {
return Pager(
config = BasePagingSource.getConfig(),
remoteMediator = RemoteMediator(checkedIds, cacheDatabase, client)
) {
cacheDatabase.itemDao.getPagingSource(type, checkedIds)
}.flow
}