I have recently approached the world of flutter and now I have a problem, in practice I need to write during the first recording of data in a Realtime Database.
I created the void function (I've done the association final databaseReference = FirebaseDatabase.instance.reference(); before.
This is the function
void writeDB() async{
User user = await _firebaseAuth.currentUser;
FirebaseDatabase.instance.reference().child('user').equalTo(user.uid);
databaseReference.child('user').set({
'email': FirebaseAuth.instance.currentUser.email,
'name': "",
'nick': "",
"score": "0"
});
}
And this is the signIn function :
Future<String> signIn(String email, String password) async {
UserCredential result = await _firebaseAuth.signInWithEmailAndPassword(
email: email, password: password);
writeDB();
User user = result.user;
return user.uid;
}
The registration and login system with firebase works fine, but the database is not written
Any help?
It seems you are using the new version of firebase auth. The currentUser property doesnt return a Future, try the following:
void writeDB() async{
User user = _firebaseAuth.currentUser;
await databaseReference.child('user').set({
'email': FirebaseAuth.instance.currentUser.email,
'name': "",
'nick': "",
"score": "0"
});
}
Related
I can save the email and the password with Firebase Authentication. I also save this information with Cloud Firestore. But how can I add and save the displayName after registering?
my code:
Future registerWithEmailAndPassword(String email, String password) async {
try {
AuthResult result = await _auth.createUserWithEmailAndPassword(
email: email, password: password);
FirebaseUser user = result.user;
// create a new document for the user with the uid
await DatabaseService(uid: user.uid)
.updateUserData('User', user.email, 'test.de/test.png', user.uid);
return _userFromFirebaseUser(user);
} catch (e) {
print(e.toString());
return null;
}
}
the register form button:
onPressed: () async {
if (_formKey.currentState.validate()) {
setState(() => loading = true);
dynamic result = await _auth
.registerWithEmailAndPassword(
email, password);
if (result == null) {
setState(() {
error = 'Valid email, please';
loading = false;
});
}
}
}
You can use updateProfile method given in the FirebaseUser class to update the name and photo url.
updateProfile({String displayName, String photoURL}).
For email you can use the different method
updateEmail(String newEmail) which is a async method.
Or to save the username directly into the firestore, after successful login you can use 'set' method of the FirebaseFirestore to save email, password and the username.
Here's the code if you want to save the Username together with the email and password
final FirebaseAuth _auth = FirebaseAuth.instance;
//register with email & password & save username instantly
Future registerWithEmailAndPassword(String name, String password, String email) async {
try {
UserCredential result = await _auth.createUserWithEmailAndPassword(email: email, password: password);
User user = result.user;
user.updateProfile(displayName: name); //added this line
return _user(user);
} catch(e) {
print(e.toString());
return null;
}
}
late User userFirebase;
Future<UserCredential> userCredential =await //Your code signin or signup
await userCredential.then((UserCredential value) {
userFirebase = value.user!;
});
await userFirebase.updateDisplayName(event.name);
You can use updateDisplayName() and updatePhotoURL() methods on a User object to add the displayName/profile image to Firebase user.
final userCredential = await _auth.createUserWithEmailAndPassword(
email: email,
password: password,
);
//After creating a user in Firebase, we then are able to change name/pictue
await userCredential.user?.updateDisplayName(name);
await userCredential.user?.updatePhotoURL(imageUrl);
As of october 2021, updateProfile() is deprecated, and you should use updateDisplayName() and updatePhotoURL() instead.
It's my first time using Firestore Cloud Messaging and I want to get the FCM token for each specific device. For quick development, I added the firebase_auth_ui package, which basically outsources the firebase auth login and registration flow. To capture the user's id and store in their doc, I use a simple function that works fine: and gets the job done:
Future<void> addUserDataToFireStore() async {
CollectionReference users = FirebaseFirestore.instance.collection('users');
String uid = FirebaseAuth.instance.currentUser!.uid;
users.doc(uid).set({
'userId': uid,
// 'displayName': currentUser!.displayName!,
});
}
Now, for some reason when I try to access the registration token, my userId gets deleted. When I try to add the token to the same user doc, the userId gets deleted and the fcm token stays. I generate the token as follows:
generateDeviceToken() async {
String? fcmToken = await FirebaseMessaging.instance.getToken();
final userId = FirebaseAuth.instance.currentUser!.uid;
await FirebaseFirestore.instance
.collection('users')
.doc(userId)
.set({'fcmToken': fcmToken});
}
The issue is when I try to call them both. I can't get the two. The doc will fill with either UserId or FCM, but now both. This is what happens when I try to call both,
Perhaps I should make a method that updates fcm token and not set it everytimg?
When you use "set", the entire document is saved with only that one value. Use "update" to update the document and add your token without removing other content.
generateDeviceToken() async {
String? fcmToken = await FirebaseMessaging.instance.getToken();
final userId = FirebaseAuth.instance.currentUser!.uid;
await FirebaseFirestore.instance
.collection('users')
.doc(userId)
.update({'fcmToken': fcmToken});
}
Future<void> addUserDataToFireStore() async {
CollectionReference users = FirebaseFirestore.instance.collection('users');
String uid = FirebaseAuth.instance.currentUser!.uid;
users.doc(uid).update({
'userId': uid,
// 'displayName': currentUser!.displayName!,
});
}
I ended up changing my logic a little bit. Thanks to #Maniak pointing me in the rigth direction. Solution that worked out was the following:
Future<void> addUserDataToFireStore() async {
final userId = FirebaseAuth.instance.currentUser!.uid;
final userDocRef = FirebaseFirestore.instance.collection('users').doc(userId);
final doc = await userDocRef.get();
if (doc.exists) {
return;
} else {
userDocRef.set({
'userId': userId,
});
}
}
Future<void> generateDeviceToken() async {
String? fcmToken = await FirebaseMessaging.instance.getToken();
final userId = FirebaseAuth.instance.currentUser!.uid;
await FirebaseFirestore.instance
.collection('users')
.doc(userId)
.update({'fcmToken': fcmToken});
}
I have a future method in a AuthService class to create new users with the inbuilt function createUserWithEmailAndPassword, but right after that I am trying to update the display name of that User? user but this never updates.
Future regEmailPass(String email, String password, String? username) async {
try {
UserCredential result = await _auth.createUserWithEmailAndPassword(
email: email, password: password);
User? user = result.user;
await user?.updateDisplayName(username);
UserInApp? userInApp = _userFromFireBaseUser(user);
await DatabaseService(user: userInApp).firstTimeCreateDB(username!);
return userInApp;
} catch (e) {
print(e.toString());
return null;
}
}
I even tried using the await user.reload() or double checking if my user was null in the first place, but in every situation, the displayName was set to null in the firestore database.
I tried this way, but i'm getting an error.
The error:
The method 'data' isn't defined for the type 'CollectionReference'. (undefined_method at [myapp] android\app\lib\useracc.dart:32)
void getData() async{
User? user = await FirebaseAuth.instance.currentUser;
var vari =FirebaseFirestore.instance.collection("users");
setState (() {
name = vari.data()['firstname'];
}
);
}
Signup/Register Page
Future<User?> _register(String fname,String lname ,String email, String password) async{
FirebaseAuth _auth = FirebaseAuth.instance;
FirebaseFirestore _firestore = FirebaseFirestore.instance;
try {
UserCredential userCrendetial = await _auth.createUserWithEmailAndPassword(email: emailController.text, password: passwordController.text);
print("Account created Succesfull");
userCrendetial.user!.updateDisplayName(fname);
userCrendetial.user!.updateDisplayName(lname);
await _firestore.collection('users').doc(_auth.currentUser!.uid).set({
"firstname": fname,
"lastname" : lname,
"email": email,
"uid": _auth.currentUser!.uid,
});
return userCrendetial.user;
} catch (e) {
print(e);
return null;
}
}
This is the user account from where i want to fetch info:
Please help. I'm struck here a long time.
You should retrieve the currentUser document then access its data:
void getData() async{
var vari = await FirebaseFirestore.instance
.collection("users")
.doc(FirebaseAuth.instance.currentUser.uid)
.get();
setState (() {
name = vari.data()['firstname'];
});
}
if you've saved your user's details in firestore and its document id is the same as that of user ID (which is preferred for ease of access and control), then:
var vari =FirebaseFirestore.instance.collection("users").doc(user!.uid).get();
This gets the document of the user, and the type is DocumentSnapshot.
Map<String,dynamic> userData = vari as Map<String,dynamic>;
now userData is stored in form of Map. suppose you want to access their 'name', so the syntax now goes like userData['name'].
Similarly other fields can be accessed from variable. It's preferred to store userData in a Provider to access it's contents anywhere in your app.
Full code snippet
void getData() async{
User? user = await FirebaseAuth.instance.currentUser;
var vari =FirebaseFirestore.instance.collection("users").doc(user!.uid).get();
Map<String,dynamic> userData = vari as Map<String,dynamic>;
setState (() {
name = userData['firstname']; //or name = userData['name']
}
);
}
I created the Firebase Auth class a year ago. Now After updating the Dart language and updating the firebase auth package some errors appeared.
import 'package:firebase_auth/firebase_auth.dart';
class AuthService {
final FirebaseAuth _firebaseAuth = FirebaseAuth.instance;
Stream<String> get onAuthStateChanged => _firebaseAuth.onAuthStateChanged.map(
(FirebaseUser user) => user.uid,
);
// Sign up Email & passowrd
Future<String> createUserWithEmailAndPassword(
String email, String password, String name) async {
final currentUser = await _firebaseAuth.createUserWithEmailAndPassword(
email: email,
password: password,
);
//updat username
var userUpdateInfo = UserUpdateInfo();
userUpdateInfo.displayName = name;
await currentUser.updateProfile(userUpdateInfo);
await currentUser.reload();
return currentUser.uid;
}
// sign in Email & password
Future<String> sinInWithEmailAndPassword(
String email, String password) async {
return (await _firebaseAuth.signInWithEmailAndPassword(
email: email, password: password))
.uid;
}
// sign out
signOut() {
return _firebaseAuth.signOut();
}
}
click here to see error
All firebase plugins for flutter since a year ago have a lot of breaking changes you should go to firebase.flutter.dev and check it
I've been trying and searching for more than two weeks The error appears in the code:
//updat username
var userUpdateInfo = UserUpdateInfo();
userUpdateInfo.displayName = name;
await currentUser.updateProfile(userUpdateInfo);
await currentUser.reload();
return currentUser.uid;
}
The method 'UserUpdateInfo' isn't defined for the type 'AuthService'