Isar does not persist data - flutter

Question

Isar does not persist state, every time I close my mobile application and open it again, previous values are not there, when they should be there. I'm fetching those values from Isar.
Please show with a counter app example how this works.
I'm attaching files.
main.dart
import 'package:flutter/material.dart';
import 'package:flutter_riverpod/flutter_riverpod.dart';
import 'package:isarapp/counter_schema.dart';
import 'package:isar/isar.dart';
import 'package:isarapp/home_screen.dart';
import 'package:path_provider/path_provider.dart';
void main() async {
WidgetsFlutterBinding.ensureInitialized();
var directory = await getApplicationDocumentsDirectory();
var path = directory.path;
await Isar.open(
[CounterObjectSchema],
directory: path,
inspector: true,
name: "isardb",
);
runApp(const MyApp());
}
class MyApp extends ConsumerWidget {
const MyApp({super.key});
#override
Widget build(BuildContext context, WidgetRef ref) {
return ProviderScope(
child: MaterialApp(
debugShowCheckedModeBanner: false,
title: 'Flutter Demo',
theme: ThemeData(
primarySwatch: Colors.blue,
),
home: const HomeScreen(),
),
);
}
}
I have edited android manifest file to get store permission then using permission_handler for getting storage access.
home_screen.dart
import 'package:flutter/material.dart';
import 'package:flutter_riverpod/flutter_riverpod.dart';
import 'package:isar/isar.dart';
import 'package:isarapp/counter_schema.dart';
import 'package:permission_handler/permission_handler.dart';
final counterProvider1 = StateProvider<int>((ref) {
return 0;
});
class HomeScreen extends ConsumerStatefulWidget {
const HomeScreen({super.key});
#override
ConsumerState<ConsumerStatefulWidget> createState() => _HomeScreenState();
}
getStoragePermission() async {
var status = await Permission.storage.status;
if (status.isDenied) {
Permission.storage.request();
}
}
class _HomeScreenState extends ConsumerState<HomeScreen> {
Isar? isar = Isar.getInstance("isardb");
CounterObject counterObject = CounterObject(counter: 9);
initCounter() async {
var count = await isar?.collection<CounterObject>().get(counterObject.id);
//reset counter on launch
ref.read(counterProvider1.notifier).state = count?.counter ?? -1;
}
increment() async {
counterObject.counter = counterObject.counter + 1;
//update state
ref.read(counterProvider1.notifier).state = counterObject.counter;
//writing counterValue to isardb on every increment call
isar?.writeTxn(
() async => await isar?.collection<CounterObject>().put(counterObject),
);
}//increment
#override
void initState() {
getStoragePermission();
//putting counterObject in
isar?.writeTxn(
() async => await isar?.counterObjects.put(counterObject),
);
initCounter();
super.initState();
}
#override
Widget build(BuildContext context) {
return Scaffold(
body: SafeArea(
child: Center(
child: Column(
children: [
Text(
ref.watch(counterProvider1).toString(),
style: const TextStyle(fontSize: 54),
),
GestureDetector(
onTap: () => increment(),
child: Container(
width: 200,
height: 40,
color: Colors.blue[300],
child: const Center(child: Text("Add")),
),
),
],
),
),
),
);
}
}
CounterObjectSchema
import 'package:isar/isar.dart';
part 'counter_schema.g.dart';
#collection
class CounterObject {
Id id = Isar.autoIncrement;
int counter;
CounterObject({required this.counter});
}