I am working on a flutter project. It was working fine until I integrated firebase authentication. I do not know What is causing this error.
Unhandled Exception: 'package:flutter/src/widgets/framework.dart': Failed assertion: line 2609 pos 20: '_debugCurrentBuildTarget == context': is not true.
The stacktrace is this.
E/flutter (22184): [ERROR:flutter/runtime/dart_vm_initializer.cc(41)] Unhandled Exception: 'package:flutter/src/widgets/framework.dart': Failed assertion: line 2609 pos 20: '_debugCurrentBuildTarget == context': is not true.
E/flutter (22184): #0 _AssertionError._doThrowNew (dart:core-patch/errors_patch.dart:51:61)
E/flutter (22184): #1 _AssertionError._throwNew (dart:core-patch/errors_patch.dart:40:5)
E/flutter (22184): #2 BuildOwner.buildScope.<anonymous closure>
E/flutter (22184): #3 BuildOwner.buildScope
E/flutter (22184): #4 RenderObjectToWidgetAdapter.attachToRenderTree
E/flutter (22184): #5 WidgetsBinding.attachRootWidget
E/flutter (22184): #6 WidgetsBinding.scheduleAttachRootWidget.<anonymous closure>
E/flutter (22184): #7 Timer._createTimer.<anonymous closure> (dart:async-patch/timer_patch.dart:18:15)
E/flutter (22184): #8 _Timer._runTimers (dart:isolate-patch/timer_impl.dart:398:19)
E/flutter (22184): #9 _Timer._handleMessage (dart:isolate-patch/timer_impl.dart:429:5)
E/flutter (22184): #10 _RawReceivePortImpl._handleMessage (dart:isolate-patch/isolate_patch.dart:192:12)
E/flutter (22184):
Till now I just have implemented the business logic but I have not integrated it with the UI. My code is given below auth_repo.dart
import 'package:auth/auth.dart';
import 'package:firebase_auth/firebase_auth.dart';
import 'package:firebase_core/firebase_core.dart';
import 'package:auth/firebase_options.dart';
class SignInWithEmailAndPasswordFailure implements Exception {
final String code;
const SignInWithEmailAndPasswordFailure(this.code);
}
class SignOutFailure implements Exception {}
class AuthRepo {
final FirebaseAuth _auth = FirebaseAuth.instance;
Future<FirebaseApp> firebaseInit() async {
return Firebase.initializeApp(
options: DefaultFirebaseOptions.currentPlatform,
);
}
Stream<AuthUser> get user {
firebaseInit();
return _auth.authStateChanges().map((firebaseUser) {
return firebaseUser == null
? AuthUser.empty
: AuthUser(id: firebaseUser.uid, email: firebaseUser.email);
});
}
Future<void> signInWithEmailAndPassword(
{required String email, required String password}) async {
try {
await _auth.signInWithEmailAndPassword(email: email, password: password);
} on FirebaseAuthException catch (e) {
throw SignInWithEmailAndPasswordFailure(e.code);
}
}
Future<void> signOut() async {
try {
await _auth.signOut();
} catch (e) {
throw SignOutFailure();
}
}
}
auth_state.dart
import 'package:equatable/equatable.dart';
class AuthUser extends Equatable {
final String id;
final String? email;
const AuthUser({required this.id, this.email,});
static const AuthUser empty = AuthUser(id: "");
@override
List<Object?> get props => [id, email];
}
auth.dart
export 'src/auth_repo.dart';
export 'src/auth_user.dart';
auth_state.dart
part of 'auth_controller.dart';
enum AuthenticationStatus { authenticated, unauthenticated }
class AuthState extends Equatable {
final AuthenticationStatus status;
final AuthUser user;
const AuthState._({required this.status, this.user = AuthUser.empty});
const AuthState.authenticated(AuthUser user)
: this._(status: AuthenticationStatus.authenticated, user: user);
const AuthState.unauthenticated()
: this._(status: AuthenticationStatus.unauthenticated);
@override
List<Object?> get props => [status,user];
}
auth_controller.dart
import 'dart:async';
import 'package:auth/auth.dart';
import 'package:equatable/equatable.dart';
import 'package:flutter_riverpod/flutter_riverpod.dart';
import 'package:flutter_task/auth_state_management/auth_provider.dart';
part 'auth_state.dart';
final authProvider = StateNotifierProvider<AuthController,AuthState>((ref) => AuthController(ref.watch(authRepoProvider)),);
class AuthController extends StateNotifier<AuthState> {
final AuthRepo _repo;
late final StreamSubscription subscription;
AuthController(this._repo) : super(const AuthState.unauthenticated()) {
_repo.user.listen((user) => _onUserChanged(user));
}
void _onUserChanged(AuthUser user) {
if (user == null) {
state = const AuthState.unauthenticated();
} else {
state = AuthState.authenticated(user);
}
}
void onSignOut() {
_repo.signOut();
}
@override
void dispose() {
subscription.cancel();
super.dispose();
}
}
main.dart
import 'package:flutter/material.dart';
import 'package:flutter_task/auth_state_management/auth_controller.dart';
import 'package:flutter_task/widgets/email_field.dart';
import 'package:flutter_task/widgets/password_field.dart';
import 'package:flutter_task/widgets/sign_in_button.dart';
import 'package:flutter_riverpod/flutter_riverpod.dart';
void main() {
runApp(const ProviderScope(child: MyApp()));
}
class MyApp extends ConsumerWidget {
const MyApp({super.key});
@override
Widget build(BuildContext context, WidgetRef ref) {
final AuthState authState = ref.watch(authProvider);
return MaterialApp(
title: 'Attendance Management Sytem',
theme: ThemeData(
primarySwatch: Colors.teal,
),
home: const MyHomePage(),
);
}
}
class MyHomePage extends StatefulWidget {
const MyHomePage({super.key});
@override
State<MyHomePage> createState() => _MyHomePageState();
}
class _MyHomePageState extends State<MyHomePage> {
TextEditingController email = TextEditingController();
TextEditingController password = TextEditingController();
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: const Text("Attendance Management System"),
),
body: SafeArea(
child: SingleChildScrollView(
child: Container(
padding: const EdgeInsets.all(10),
child: Column(
mainAxisAlignment: MainAxisAlignment.spaceAround,
children: <Widget>[
Column(
mainAxisAlignment: MainAxisAlignment.center,
children: [
Column(
mainAxisAlignment: MainAxisAlignment.spaceAround,
children: [
SizedBox(
height: 156,
width: 156,
child: Image.asset(
"images/logo.png",
fit: BoxFit.contain,
),
),
const SizedBox(
height: 10,
),
const Text(
"Attendance Management System",
textAlign: TextAlign.center,
style: TextStyle(
fontSize: 26,
fontWeight: FontWeight.bold,
),
)
],
),
],
),
const SizedBox(
height: 50,
),
Column(
mainAxisAlignment: MainAxisAlignment.center,
crossAxisAlignment: CrossAxisAlignment.stretch,
children: const [
EmailField(),
SizedBox(
height: 15,
),
PasswordField(),
SizedBox(
height: 15,
),
SignInButton()
],
)
],
),
),
),
),
);
}
}
I solved this by adding a few things to the main function. The updated main function looks like this:
void main() async {
WidgetsFlutterBinding.ensureInitialized();
await Firebase.initializeApp(
options: DefaultFirebaseOptions.currentPlatform,
);
runApp(const ProviderScope(child: MyApp()));
}