I have created an action as follows:
class EmailLogIn {
EmailLogIn({this.email, this.password});
String email;
String password;
}
a reducer as follows:
FirebaseUser _emailLogIn(FirebaseUser user, action) {
return action.user;
}
after following the flutter by example tutorial.
The middleware is executed but I get an error in the reducer. action.user getter is not recognised.
Please assist.
Also note: A similar question exists at Flutter, Redux and Firebase Auth Invalid argument(s) error and I was following the tutorial at Flutter by example: LogIn Redux Cycle contd
Yes, it correct because the class EmailLogIn doesn't contain user attribute but it contains email and password when you do action.user getter is not recognized because user doesn't exist in the class, if you take a look at FlutterByExample code the LogInSuccessful contains final FirebaseUser user; not email and password!
Related
I have made a sign-in page, and a sign-up page with Firebase Authentication in Flutter and Dart.
After the sign up, I'm trying to retrieve the current user's displayName, however, when I try retrieving it, I seem to get not the current one, but the one that I signed up with before this one.
However, when I for example hot-restart the app, I get the current user's details just fine.
I try to retrieve the current user's displayName property with this code:
static String? getUsername() {
return FirebaseAuth.instance.currentUser?.displayName!;
}
The way I call this, is I initialize a variable to store the username which I get from the method, on a different dart file, different from the signUp page I got. I also call this method in the initState() method.
This is how I sign-up the user and set the displayName:
static void signUpUser(String username, String emailAddress, String password) async {
try {
final credential =
await FirebaseAuth.instance.createUserWithEmailAndPassword(
email: emailAddress,
password: password,
);
// Here I set the displayName property
await credential.user!.updateDisplayName(username);
} on FirebaseAuthException catch (e) {
if (e.code == 'weak-password') {}
else if (e.code == 'email-already-in-use') {}
} catch (e) {}
}
I tried to use the user.reload(), and FirebaseAuth.userChanges() functions, but these did not seem to fix my problem.
Maybe I'm trying to retrieve the displayName property wrong, what am I missing? I'm quite new to developing my own apps and working with Firebase.
The Future that updateDisplayName returns completes when the call has been made to the underlying Firebase SDK. It does not automatically update the user profile in your application at that point though. That will only happen automatically once every hour (when the SDK refreshes the ID token on which that profile is based), or when the user signs out and in again.
To force a refresh of the profile from your application code outside of those automatic conditions, you can call reload() on the user object.
the error I'm getting:
A value of type 'UserA?' can't be returned from the method
'_userFromFirebaseUser' because it has a return type of 'User'
I'm following along this tutorial: Flutter & Firebase App Tutorial #6 - Custom User Model
At about 5:35 into the video he talks about returning the Firebase user object and linking it to the model. Now the video is about 2 years old, so Firebase has moved on a bit. FirebaseUser is now just called User, but I think in my changes I've made a mistake. Here is my code:
class AuthService{
final FirebaseAuth _auth = FirebaseAuth.instance;
//create user object based on firebaseuser
User _userFromFirebaseUser(User? user) {
return user != null ? UserA(uid: user.uid) : null;
}
This is my model:
class UserA {
final String uid;
UserA({ required this.uid });
}
Since FirebaseUser is now just called User I've changed the model to be UserA since I was getting confused.
Any suggestion on what I'm doing wrong?
You're mixing up the two types of users in your code.
The video has two types: FirebaseUser and User, which you have mapped to Users and UserA respectively.
With your types, the function should be:
UserA? _userFromFirebaseUser(User? user) {
return user != null ? UserA(uid: user.uid) : null;
}
Aside from the type change, the ? is needed in Dart nowadays to indicate that you may return either a UserA object or null.
I have an ionic/angular frontend where I have the user registration via firebase. I already retrieve my firebase token, send it to my .net backend and verify the token with the [Authorize] annotation.
After authorization, I want to decode the token and use the id of the user for further processing.
Step get the token from the "Authorization" header
string authHeader = this.HttpContext.Request.Headers["Authorization"];
var decodedFirebaseToken = await fireBaseAuthenticationHelper.GetUserFromFirebaseIdAsync(authHeader.Substring("Bearer ".Length).Trim());
Step retrieve the decoded token
public async Task<FirebaseToken> GetUserFromFirebaseIdAsync(string token)
{
FirebaseToken decodedToken = await FirebaseAuth.DefaultInstance
.VerifyIdTokenAsync(token);
return decodedToken;
}
The problem now is that the FirebaseAuth.DefaultInstance is always null and throws a null pointer exception. I don't know where or how to initialize the DefaultInstance.
On the FirebaseAuth class is a comment:
public sealed class FirebaseAuth : IFirebaseService
{
//
// Summary:
// Gets the auth instance associated with the default Firebase app. This property
// is null if the default app doesn't yet exist.
public static FirebaseAuth DefaultInstance { get; }
So I am pretty sure I have to initialize it somewhere but I can't find where.
You have to initialize the SDK by creating a new FirebaseApp first. See the code samples in https://firebase.google.com/docs/admin/setup
Hello all I'm working on a flutter project and I'm able to sign in and sign out with email using FirebaseAuth. The site docs say to grab the logged in users uid I input
FirebaseUser user = FirebaseAuth.getInstance().getCurrentUser();
Now I've done that but I keep getting an error under the getInstance() method returning that it is not a method available to FirebaseAuth. I have imported everything the class is available but not the method.
Seems you are reading the wrong docs. The firebase_auth docs says to use FirebaseAuth.instance
getUser() async {
FirebaseUser user = await FirebaseAuth.instance.currentUser();
}
I've created a login and registration screen that works with my Flutter app, using Firebase as the backend authentication service. I'm able to switch between the login, registration and reset password screens well.
The Issue
At the moment, the registration screen accepts any email address that is entered, whether or not it is real. For example, if I were to type in gvevg#gverwbgw.com, it would allow the user to register. This is obviously an issue, when it comes to fake accounts and spam etc.
The Aim
I would basically like to be able to edit my code, to automatically generate an email address verification email, which prevents the user from signing in, before their email address has been verified. The code I have made uses a Future, FirebaseAuth and async/await to make this happen.
My Current Code
Firstly, I define an AuthBase abstract class, that creates the 'createUserWithEmailAndPassword' function (amongst others) as follows:
abstract class AuthBase {
Stream<User> get onAuthStateChanged;
Future<User> currentUser();
Future<User> createUserWithEmailAndPassword(String email, String password);
}
Then, I create an Auth function, that implements AuthBase, gets the current user from Firebase and creates the registration Future function, as follows:
class Auth implements AuthBase {
final _firebaseAuth = FirebaseAuth.instance;
// This creates the user ID token variable (if one doesn't already exist) which is then populated using one of the login methods.
User _userFromFirebase(FirebaseUser user) {
if (user == null) {
return null;
}
return User(uid: user.uid);
}
// This helps to get the user from Google Firebase, noting if there is or isn't a user with those login details already.
#override
Stream<User> get onAuthStateChanged {
return _firebaseAuth.onAuthStateChanged.map(_userFromFirebase);
}
// This identifies the current user, who is logged in at the time.
#override
Future<User> currentUser() async {
final user = await _firebaseAuth.currentUser();
return _userFromFirebase(user);
}
// This creates the user account for an email-and-password sign-in, with firebase, if it doesn't already exist.
#override
Future<User> createUserWithEmailAndPassword(
String email, String password) async {
final authResult = await _firebaseAuth.createUserWithEmailAndPassword(
email: email, password: password);
return _userFromFirebase(authResult.user);
}
}
My Question
How do I edit my code, so that it allows me to implement email verification automatically for any user that wants to sign in with email? I believe the sendEmailVerification() function must use FirebaseUser, although I am not sure how to implement it here. I would appreciate any help. Thanks!
Email+password authentication requires nothing more than that the user knows the combination of email+password. It doesn't in itself require the email address to be verified to sign in. If you want the email address to be verified before allowing access to other data, you can do that by checking the user's token for the email_verified claim for example in the security rules of your database.
Also see:
How do I lock down Firebase Database to any user from a specific (email) domain?
Firebase email verification at SignUp
How to prevent user authentication in Firebase/Vue.js BEFORE email is verified
Only let pre-verified users log into Firebase