flutter doesn't load more users don't know why - flutter

Question

So I'm trying to load more users with pagination, it should only show 20 users and load new ones when the end of the screen is reached, but widget.loadMoreEndOfScroll gets returned null when it shouldn't, I don't know what else could be wrong, other times it worked a few times and than it stopped working and only showing 20 instead of loading new ones.
so this is the class what I use
class CAScaffold extends StatefulWidget {
const CAScaffold({
Key? key,
this.canLoadMoreEndOfScroll,
this.loadMoreEndOfScroll,
}) : super(key: key);
final bool? canLoadMoreEndOfScroll;
final Function? loadMoreEndOfScroll;
#override
State<CAScaffold> createState() => _CAScaffoldState();
}
this is the listener below
class _CAScaffoldState extends State<CAScaffold> {
ScrollController scrollUsersController = ScrollController();
final GlobalKey<ScaffoldState> _key = GlobalKey();
#override
void initState() {
scrollUsersController.addListener(() {
if(scrollUsersController.offset >= scrollUsersController.position.maxScrollExtent &&
!scrollUsersController.position.outOfRange &&
widget.canLoadMoreEndOfScroll != null && widget.canLoadMoreEndOfScroll!) {
print('endofscroll ${widget.loadMoreEndOfScroll}');
if(widget.loadMoreEndOfScroll != null) {
print('loadMoreEndOfScroll ${widget.loadMoreEndOfScroll}');
widget.loadMoreEndOfScroll!();
}
}
});
super.initState();
}
here it gets called and will call the getAllUsers function
#override
Widget build(BuildContext context) {
return CAScaffold(
canLoadMoreEndOfScroll: loadingUsers == false && allUsersLoaded == false,
loadMoreEndOfScroll: () {
getAllUsers();
newSearch = false;
},
pageTitle: 'Accounts',
child: Column(
children: <Widget>[
BlocConsumer<AccountScreenCubit, AccountScreenState>(
listener: (context, state) {
if(state is AccountScreenLoadingUsersState) {
loadingUsers = true;
}
if(state is AccountScreenUsersError) {
loadingUsers = false;
}
if(state is AccountScreenUsersLoaded) {
users.addAll(state.users);
print(state.users.length);
loadingUsers = false;
if(state.users.isEmpty) {
allUsersLoaded = true;
}
}
},
getAllUsers function
void getAllUsers() {
if(loadingUsers == false && allUsersLoaded == false) {
context.read<AccountScreenCubit>().getUsers(
searchTerm: searchInput,
orderFilter: dropDownValue,
newSearch: newSearch,
);
}
}
and than it gets send to the cubit
class AccountScreenCubit extends Cubit<AccountScreenState> {
AccountScreenCubit() : super(AccountScreenInitial());
QuerySnapshot? lastDocument;
Future<void> getUsers({String? searchTerm, bool newSearch = true, String? orderFilter}) async {
if(newSearch){
lastDocument = null;
}
try {
emit(AccountScreenLoadingUsersState());
await FirestoreUserHelper.getAllUsersOrderedByName(
20,
searchTerm: searchTerm,
orderFilter: orderFilter,
lastSnapshot: lastDocument,
).then((FirestoreReturn value) {
if(value.success) {
if(value.snapshot != null) {
lastDocument = value.snapshot;
}
emit(AccountScreenUsersLoaded(users: value.returnMain));
} else {
emit(AccountScreenUsersError(errorMsg: value.errorMessage));
}
});
} catch(e) {
emit(AccountScreenUsersError(errorMsg: 'Something went wrong: $e'));
}
}
}
if there is something I have missed let me know

Answer 1

You are not calling the getAllUsers function because you forgot the brackets, so add them.
loadMoreEndOfScroll: () {
getAllUsers();
newSearch = false;
},
You probably have to put CAScaffold inside BlocConsumer, otherwise parameter canLoadMoreEndOfScroll: loadingUsers == false && allUsersLoaded == false, is never updated.