Get user id after creating a user in firebase - javascript

I am trying to retrieve the id of the newly created user on my website. Admin creates the account based on the user's email and password. But as soon as the account is created, I need the id and use it in the firestore database as a document id to store user info. This is how my code looks:
firebase.auth().createUserWithEmailAndPassword(email.trim(), password.trim())
.then(function () {
db.collection("users").add({
email: email.trim(),
name: username.trim(),
id: //I need the user's id here
}).then(function () {
window.alert('User registered successfully');
window.location = 'user.html';
}).catch(function (error) {
window.alert("There was some error. Please try again.");
console.log(error.code);
console.log(error.message);
});
})
Is there a way that I can get that user's id in then part?

You can try this:
firebase.auth().createUserWithEmailAndPassword(email, password)
.then((userCredential) => { // the userCredential is a variable that will hold the response in it, it contains all the user info in it
// Signed in
var user = userCredential.user;
// This user variable contains all the info related to user including its id
})
.catch((error) => {
var errorCode = error.code;
var errorMessage = error.message;
});
Reference

Related

Firebase signInWithEmailAndPassword and onAuthStateChanged Realtime Database logging issue

I'm working on a webpage using HTML5 CCS etc, where it uses a authentication process using firebase for users. Its my first time ever working on firebase, so i still have no idea how to correctly code using it.
I manually add a admin user on firebase, so i can use those credentials to log in to the webpage. In the signInWithEmailAndPassword i used a code to log into the console some information about credentials, but whats happening is that while it does work (the authentication). The only way it logs info into the console is when i don't redirect the user to another page using the onAuthStateChanged (basically not using it at all).
Basically it authenticates correctly, but its doesn't log the info in the realtime database unless i remove the onAuthStateChanged.
Here is the code
signInWithEmailAndPassword(auth, email, password)
.then((userCredential) => {
// Signed in
const user = userCredential.user;
const dt = new Date();
update(ref(database, 'users/' + user.uid), {
Email: email,
Password: password,
Last_Login: dt
})
alert('Usuario ingresado!')
location.href = 'test.html'
})
.catch((error) => {
const errorCode = error.code;
const errorMessage = error.message;
alert(errorMessage)
});
});
const user = auth.currentUser;
onAuthStateChanged(auth, (user) => {
if (user) {
// User is signed in, see docs for a list of available properties
// https://firebase.google.com/docs/reference/js/firebase.User
const uid = user.uid;
location.href = 'test.html'
// ...
} else {
// User is signed out
// ...
}
});
I heard this process is asynchronous.
Calls to Firebase (and most modern cloud APIs) are asynchronous, since they may take some time to complete. But as soon as the user is signed in, the local onAuthStateChanged will be called - which interrupts the write to the database.
If the user always actively signs in to this page (so you always call signIn...), then you don't need the onAuthStateChanged handler and can just include the navigation code in the then:
signInWithEmailAndPassword(auth, email, password)
.then((userCredential) => {
// Signed in
const user = userCredential.user;
const dt = new Date();
update(ref(database, 'users/' + user.uid), {
Email: email,
Password: password,
Last_Login: dt
}).then(() => {
location.href = 'test.html'; // 👈
})
})
.catch((error) => {
const errorCode = error.code;
const errorMessage = error.message;
alert(errorMessage)
});
});

FireBase user authentication redirect to another page

I have created a signupPage.html to authenticate a user and and log information to the realtime database in firebase using this code:
signUp_button.addEventListener('click', (e) => {
var email = document.getElementById('email').value;
var password = document.getElementById('password').value;
createUserWithEmailAndPassword(auth, email, password)
.then((userCredential) => {
//signed up
const user = userCredential.user;
//log to database
set(ref(database, 'users/' + user.uid),{
email : email
})
//this is where page redirection
alert('User Created');
})
.catch((error) => {
const errorCode = error.code;
const errorMessage = error.message;
alert(errorMessage);
});
});
Then when I click my submit button everything works and the user is authenticated and information is stored into the realtime database. Now I want to redirect the user to a login page after they submit their signup. In my code under "this is where page redirection", I put location.href = "login.html". This does redirect the page and authenticate the user but it no longer stores the data into the realtime database. Any suggestions?
You were close. set() is an asynchronous action, so by adding the redirect where you were, you would redirect before the set() had the chance to execute. You must first wait for the set() to finish, and then redirect.
signUp_button.addEventListener('click', (e) => {
const email = document.getElementById('email').value;
const password = document.getElementById('password').value;
createUserWithEmailAndPassword(auth, email, password)
.then(async (userCredential) => {
//signed up
const user = userCredential.user;
// log to database & wait for it to finish!
return set(ref(database, 'users/' + user.uid), {
email : email
})
})
.then(() => {
alert('User Created'); // avoid alert, it blocks user input!
// update a div with an information message instead
location.href = "login.html";
})
.catch((error) => {
const errorCode = error.code;
const errorMessage = error.message;
alert(errorMessage); // avoid alert, it blocks user input!
// update a div with an error message instead
});
});

Firebase authentication and store user in MySQL

I want to know how I can register a user using Firebase authentication, and then proceed to store the user in a MySQL database as well for later use.
I am currently authenticating the user using Firebase, but am not sure how to go about calling a Nodejs API to query the MySQL database.
All the examples I have seen to store users in MySQL are calling the API from the form action itself. However, I want to first authenticate the user with Firebase.
If someone has experience with this I would appreciate the help.
const signupForm = document.querySelector('#sign-up-form');
signupForm.addEventListener('submit', (e) => {
e.preventDefault();
//get user info
const username = signupForm['signup-username'].value;
const email = signupForm['signup-email'].value;
const password = signupForm['signup-password'].value;
//signup the user
auth.createUserWithEmailAndPassword(email, password).then(cred => {
//createUser function returns the user credentials
user = auth.currentUser;
}).then(function () {
user.updateProfile({
displayName: username
})
}).catch((error) => {
//Handle errors
var errorCode = error.code;
var errorMessage = error.message;
// [START_EXCLUDE]
if (errorCode == 'auth/weak-password') {
alert('The password is too weak.');
} else {
alert(errorMessage);
}
});
})
You need to have some sort of backend to send the user and then use Express or some other server make the query and save to MySQL. You can't do it from the client because it's insecure.
eg:
auth.createUserWithEmailAndPassword(email, password).then(async (user) {
user.updateProfile({
displayName: username
})
const result = await axios.post('/api/saveUser/', user, config)
})

How to add username with email and password in Firebase?

I'm using Firebase and I'm trying to add a username to the database with the email and password.
Is there a way to do it or is createUserWithEmailAndPassword() function only for email and password?
signUp.addEventListener("click", function(user)
{
var username = usernameTxt.value;
var email = emailTxt.value;
var password = passwordTxt.value;
firebase.auth().createUserWithEmailAndPassword(email, password).catch(function(error)
{
// Handle Errors here.
var errorCode = error.code;
var errorMessage = error.message;
if (errorCode == 'auth/email-already-in-use')
{
alert('email-already-in-use.');
}
else
{
alert(errorMessage);
}
console.log(error);
});
});
The solution that i found to how to add username with the createUserWithEmailAndPassword() function:
firebase.auth().onAuthStateChanged(function(user) {
var username = usernameTxt.value;
if (user) {
firebaseDataBase.ref('users/' + user.uid).set({
email: user.email,
uid : user.uid,
username: username
});
console.log("User is signed in.");
} else {
console.log("No user is signed in.");
}
});
You need to create that database users child node yourself ;-)
The createUserWithEmailAndPassword function only creates a new user in Firebase authentication service. The database itself isn't changed at all as a result.
To add this new user to the database as well, try:
firebase.database().ref("users").child(user.uid).set(...)
This cannot be done through createUserWithEmailAndPassword() but there is a firebase method for this . You will need to listen for when authentication state is changed , get the user , then update the profile info . See Below
This code would come after createUserWithEmailAndPassword()
firebase.auth().onAuthStateChanged(function(user) {
if (user) {
// Updates the user attributes:
user.updateProfile({ // <-- Update Method here
displayName: "NEW USER NAME",
photoURL: "https://example.com/jane-q-user/profile.jpg"
}).then(function() {
// Profile updated successfully!
// "NEW USER NAME"
var displayName = user.displayName;
// "https://example.com/jane-q-user/profile.jpg"
var photoURL = user.photoURL;
}, function(error) {
// An error happened.
});
}
});
As stated in firebase User Api here : https://firebase.google.com/docs/reference/js/firebase.User#updateProfile
Hope this helps
You can create a users endpoint and store custom user data in there.
function writeUserData(userId, name, email, imageUrl) {
firebase.database().ref('users/' + userId).set({
username: name,
email: email,
profile_picture : imageUrl,
// Add more stuff here
});
}
Have a look to https://firebase.google.com/docs/database/web/read-and-write

save user's extra details on signup firebase

I want to save the user's extra details i.e number, age only when the user signup(one time). But there is no callback for to check if the signup was successful or not.
firebase.auth().createUserWithEmailAndPassword(email, password).catch(function(error) {
// Handle Errors here.
var errorCode = error.code;
var errorMessage = error.message;
// ...
});
so what to do when you want to store the data only one time when the user signup rather using
firebase.auth().onAuthStateChanged(function(user) {
if (user) {
// User is signed in.
} else {
// No user is signed in.
}
});
which will be fired every time user login/logout but I dont want to save the extra signup details every time.
firebase.auth().createUserWithEmailAndPassword($scope.email, $scope.password)
.then(function(user) {
var ref = firebase.database().ref().child("user");
var data = {
email: $scope.email,
password: $scope.password,
firstName: $scope.firstName,
lastName: $scope.lastName,
id:user.uid
}
ref.child(user.uid).set(data).then(function(ref) {//use 'child' and 'set' combination to save data in your own generated key
console.log("Saved");
$location.path('/profile');
}, function(error) {
console.log(error);
});
})
.catch(function(error) {
var errorCode = error.code;
var errorMessage = error.message;
if (errorCode == 'auth/weak-password') {
alert('The password is too weak.');
} else if (errorCode == 'auth/email-already-in-use') {
alert('The email is already taken.');
} else if (errorCode == 'auth/weak-password') {
alert('Password is weak');
} else {
alert(errorMessage);
}
console.log(error);
});
Here I have saved data in 'user.uid' key which is returned by firebase upon successful registration of user.
Calling createUserWithEmailAndPassword() return a promise, which has both a catch() and then() method you can respond to.
The Firebase documentation intentionally doesn't use then then() clause, since it's in general better to respond to the onAuthStateChanged() event (which also fires when the user reloads the app and is still signed in. Even in your case that might be the better place to put the code to store the user profile, as some of the data might change when the app reloads.
But if you want to explicitly respond to "the user was created successfully", you can do so with:
firebase.auth()
.createUserWithEmailAndPassword(email, password)
.then(function(user) {
console.log("Create user and sign in Success", user);
});

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