Provider in different route - Flutter - firebase

Question

I'm new in Flutter development, i'm making an app with Firebase Auth, in where I'm using an Authentication Wrapper class that, if user is logged in, goes to Home Screen, else goes to SignIn Screen.
The problem is that, when I want to navigate to AuthWrapper, I get this error message in a red screen:
Error: Could not find the correct Provider<UserFirebaseModel> above this Builder Widget
This happens because you used a `BuildContext` that does not include the provider
of your choice. There are a few common scenarios:
- You added a new provider in your `main.dart` and performed a hot-reload.
To fix, perform a hot-restart.
- The provider you are trying to read is in a different route.
Providers are "scoped". So if you insert of provider inside a route, then
other routes will not be able to access that provider.
- You used a `BuildContext` that is an ancestor of the provider you are trying to read.
Make sure that Builder is under your MultiProvider/Provider<UserFirebaseModel>.
This usually happens when you are creating a provider and trying to read it immediately.
Here there are the most important classes of my code, where I think the problem is.
main.dart
void main() async {
WidgetsFlutterBinding.ensureInitialized();
await Firebase.initializeApp();
runApp(MyApp());
}
class MyApp extends StatelessWidget {
#override
Widget build(BuildContext context) {
return StreamProvider.value(
value: Authentication().user,
initialData: UserFirebaseModel.initialData(),
child: MaterialApp(
title: 'AccessCity',
debugShowCheckedModeBanner: false,
theme: ThemeData(
primarySwatch: Colors.blue,
fontFamily: 'Montserrat',
),
routes: getAppRoutes(),
initialRoute: '/',
onGenerateRoute: (RouteSettings settings) {
return MaterialPageRoute(
builder: (BuildContext context) => HomeTempPage(),
);
},
),
);
}
}
authWrapper.dart
class AuthWrapper extends StatelessWidget {
#override
Widget build(BuildContext context) {
final user = Provider.of<UserFirebaseModel>(context);
print(user);
// ignore: unnecessary_null_comparison
if (user == null) {
return LoginPage();
} else {
return Home();
}
}
}
routes.dart
Map<String, WidgetBuilder> getAppRoutes() {
return <String, WidgetBuilder>{
// Home Temporal Page
'/': (BuildContext context) => HomeTempPage(),
// Components Pages
'generalBigButton': (BuildContext context) => GeneralBigButtonPage(),
'textEntryField': (BuildContext context) => TextEntryFieldPage(),
'secureTextEntryField': (BuildContext context) =>
SecureTextEntryFieldPage(),
'underlinedButton': (BuildContext context) => UnderlinedButtonPage(),
// Modules
'login': (BuildContext context) => LoginPage(),
'authWrapper': (BuildContext context) => AuthWrapper(),
};
}
homeTempPage.dart
const String _title = 'Home Temporal';
const String _goAccessCityButton = 'Ir a AccessCity';
const String _goAccessCityLabel = 'Ir a pantalla Login de la app';
class HomeTempPage extends StatefulWidget {
#override
_HomeTempPageState createState() => _HomeTempPageState();
}
class _HomeTempPageState extends State<HomeTempPage> {
final model = HomeTempModel();
#override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text(_title),
backgroundColor: mainBlue,
),
body: Center(
child: Column(
mainAxisAlignment: MainAxisAlignment.start,
children: [
SizedBox(height: 10),
MaterialButton(
child: Text(_goAccessCityButton),
color: Colors.blue,
textColor: Colors.white,
onPressed: () {
model.navigateToStart(context);
},
),
Text(_goAccessCityLabel),
SizedBox(height: 30),
Expanded(
child: Container(
child: ListView(
children: model.getComponents(context),
),
),
),
],
),
),
);
}
}
In this last class, the line
navigateToStart() method
goes to route 'authWrapper'.
UserFirebaseModel
class UserFirebaseModel {
final String id;
final String email;
UserFirebaseModel(this.id, this.email);
factory UserFirebaseModel.initialData() {
return UserFirebaseModel('', '');
}
}
Authentication class
class Authentication {
final FirebaseAuth _firebaseAuth = FirebaseAuth.instance;
// Create user based on User (ex FirebaseUser)
UserFirebaseModel? _userFromFirebaseUser(User? user) {
final _mail;
if (user != null) {
_mail = user.email;
if (_mail != null) {
return UserFirebaseModel(user.uid, _mail);
}
} else {
return null;
}
}
// Auth change user stream
Stream<UserFirebaseModel?> get user {
return _firebaseAuth.authStateChanges().map(_userFromFirebaseUser);
}
// Sign in with email and password
Future<String?> signIn({
required String email,
required String password,
}) async {
try {
await _firebaseAuth.signInWithEmailAndPassword(
email: email,
password: password,
);
print("Signed in");
return "";
} on FirebaseAuthException catch (e) {
return e.message;
}
}
User? getUser() {
try {
return _firebaseAuth.currentUser;
} on FirebaseAuthException {
return null;
}
}
}
Thanks for your help, i need to solve it!