I have a database in Firebase that will have individual user nodes. In each user's node will be data pertaining to them and will be private. In addition to that I want to create a node that is JUST a collection of registered emails. The reason is when a user is on the Sign In VC and the user types an email in..If the email is already registered an image view will turn green. However, if the email is not in the database (or if it doesn't match email address format) the image will be red.
A previous answer on my previous question(s) illustrated that I need to change the '.' to a ',' in email addresses. So #gmail.com would be stored as gmail,com
I have that down.
FIRAuth.auth()?.createUser(withEmail: email, password: password, completion: { (user, error) in
if error == nil {
let email = firstContainerTextField.text ?? ""
let newString = email.replacingOccurrences(of: ".", with: ",", options: .literal, range: nil)
self.ref.child("users").child("allUsers").child(newString).setValue(true)
self.ref.child("users").child((user?.uid)!).setValue(["Email": email])
FIRAuth.auth()!.signIn(withEmail: email,
password: password)
} else {
//registration failure
}
This is the code from the New User VC (partial).
So the node that says "users" and "allUsers" looks like this on Firebase Console
users
allUsers
bob#bob,com: true
ted#ted,com: true
The 'true' part was just so I could get the bob#bob,com onto the database...the true part will never be used for anything.
On the log in VC I honestly cannot figure out what to do
A previous answer said to use
hasChildren()
And I used that and then googled what to do with that
and I tried using something like this
ref.child("users").child("allUsers").queryEqual(toValue: newString)
.observe(.value, with: { snapshot in
if snapshot.hasChildren() {
for child in snapshot.children.allObjects as! [FIRDataSnapshot] {
....
}
});
But I just cannot seem to get anywhere with it.
How can I simply see if a textfield.text == an email already stored in firebase?
(I did convert the '.' to ',' when comparing)
Please don't use email addresses as keys. Email addresses are dynamic and may change (as in if the users wants to change it) and if they do, you'll have a mess on your hands as every node that directly used that email would have be deleted and re-created.
Best practice is to disassociate key's from the data they contain.
Here's the structure to use
emails
-Yiaisjpa90is
email: "dude#test.com"
-Yijs9a9js09a
email: "thing#test.com"
then you simply query the email node for the email you are looking for, and handle accordingly if it exists.
And some code
emailsRef.queryOrdered(byChild: "email").queryEqual(toValue: "dude#test.com")
.observe(.value, with: { snapshot in
if snapshot.value is NSNull {
print("the snapshot was null, no email found")
} else {
print("email was found, YIPEE")
}
})
For completeness it would be a little more Swifty to use
if snapshot.exists() {
print("found it")
} else {
print("no email found")
}
Related
Use Case: App build around email (with three childs of importance here). Now I just want cell phone login users to have the same Childs.
So something like this below must not produce an error(it currently does). I can do everything else with phone login (even create a user with phone number), but I want him to have these Childs too, for when the user uses phone and not email.
Auth.auth().createUser(withEmail: ResultString, password: remainingPart) { (user, error) in
let databaseRef = Database.database().reference()
guard error == nil else { return }
guard let user = user else { return }
let userObject =
[
"users": ResultString,
"postID": user.user.uid,
"e2": remainingPart,
] as [String: Any]
databaseRef.child("people").child(user.user.uid).setValue(userObject)
print("YESSSSS")
}
It seems that you're trying to pass a phone number to createUser(withEmail:,password:). Since a phone number is not a valid email address, the API rejects it.
To sign a user in with their phone number, follow the documentation for phone number sign-in.
After singing the user in with their phone number, you can still write their details to the database, same as you're doing now.
I thought I'd return to StackOverflow with another question because you guys helped me significantly with my last issue
Anyway, I currently have my authentication system setup so that the sign in and signup button are shared. I am looking to have firebase reference storage when an email is entered to have it checked against other accounts in the database. As of right now, a user can enter an email address for their account and then if they enter the wrong password it just sends them right to the sign up even though they currently have an account. This is a serious problem as it will cause confusion
I want it to work like so:
If the email address is taken, I want an alert to be displayed for the user says "Incorrect password"
If the email address is not taken, I want it to tell the user that they need to enter a password with at least 10 characters, 1 number, and 1 special character, which I have already figured out using
I only want it to segue to create a new user if the email is not taken and the password and email field meet the criteria fields that I have already set within my code. I just need help preventing it from switching to the create new user VC if the email is already taken, and I need to to say
func isValidPassword(_ email: String) -> Bool {
let emailRegEx = "##$%^&+=^.*(?=.{10,})(?=.*d)(?=.*[a-z])(?=.*[A-Z])(?=.*[##$%^&+=]).*$"
let emailPred = NSPredicate(format:"SELF MATCHES %#", emailRegEx)
return emailPred.evaluate(with: email)
}
Anyway, here is the code so far attached to the IBAction
if let email = emailField.text, let password = passwordField.text {
Auth.auth().signIn(withEmail: email, password: password, completion:
{ (user,error) in
if error == nil {
if let user = user {
self.userUid = user.user.uid
self.goToFeedVC()
}
} else {
self.goToCreateUserVC()
Here is a picture of the interface
I want it to be intuitive but I have been unable to code this myself so if anyone is able to help advise me on how to finish this block it would be incredibly appreciated
Firebase gives pretty detailed error responses for their Auth call:
So you can check to see what the error is inside of your call:
Below are the two error that they give (I only added the two scenarios that you mentioned)
Description: The password is invalid or the user does not have a password.
FIRAuthErrorUserInfoNameKey: ERROR_WRONG_PASSWORD
&
There is no user record corresponding to this identifier. The user may have been deleted.
FIRAuthErrorUserInfoNameKey: ERROR_USER_NOT_FOUND
Auth.auth().signIn(withEmail: email, password: password, completion:
{ (user,error) in
if error == nil {
if let user = user {
self.userUid = user.user.uid
self.goToFeedVC()
}
} else {
guard let error = error?.localizedDescription else { return } // but actually handle this
print(error)
if error == wrong password {
// show alert for email taken/wrong password
} else if error == user doesnt exists {
// self.goToCreateUserVC()
}
}
}
Just replace the if and else if conditions with the actual errors. I'd avoid comparing the strings and use the key/code in case the strings change in the future.
Official list of error codes can be found here
And if you print the full error instead of the error?.localizedDescription you'll get the full details, as can be seen here:
Optional(Error Domain=FIRAuthErrorDomain Code=17011 "There is no user record corresponding to this identifier. The user may have been deleted." UserInfo={NSLocalizedDescription=There is no user record corresponding to this identifier. The user may have been deleted., FIRAuthErrorUserInfoNameKey=ERROR_USER_NOT_FOUND})
I'm a relatively new Swift programmer and am using Firebase for the first time so please excuse any misunderstandings I may have and my lack of knowledge about terminology.
I am attempting to retrieve data about a user that is stored in a database (email and username).
The code successfully finds the userID in the database. The userID is then used in order to navigate into the directory containing the username and email. It stores those values in snapshot.
For some reason, when snapshot is printed, it shows the userID but the contents of the directory (username and password) are shown as <null>. I am certain that the directory I am attempting to access and retrieve data from exists and is not empty (it contains a username and email). I wantsnapshot to store the username and email, but printing shows that it is not doing so correctly and I cannot figure out why.
here is my code block:
func checkIfUserIsLoggedIn() {
if Auth.auth().currentUser?.uid == nil {
perform(#selector(handleLogout), with: nil, afterDelay: 0)
} else {
let uid = Auth.auth().currentUser?.uid;
Database.database().reference().child("Users").child(uid!).observeSingleEvent(of: .value, with: { (snapshot) in
print(snapshot)
if let dictionary = snapshot.value as?[String:AnyObject] {
self.userLabel.text = dictionary["name"] as? String
}
}, withCancel: nil)
}
}
and here is what is being printed to the console:
Snap (ywU56lTAUhRpl3csQGI8W8WmQRf1) <null>
Here is the database entry I am attempting to reach and log to snapshot:
I'm a new Stack Overflow user and don't have enough experience on the site to be allowed to embed images in posts, so this is the external link
Thanks for reading, any help would be much appreciated!!
Your reference in Firebase is to "users", but you are using .child("Users") in your code. Make sure your lookup matches case to your node. I find it best to create a reference to that node and use it for writing to and reading from.
let usersRef = Database.Database().reference().child("users")
Snap (ywU56lTAUhRpl3csQGI8W8WmQRf1) <null> the portion in parenthesis refers to the end node of what you are trying to observe. In this case it refers to uid!.
if u want to get username or email then you make first the model class for
Example:-
class User: NSObject {
var name: String?
var email: String?
}
then user firebase methed observeSingleEvent
FIRDatabase.database().reference().child("user").child(uid).observeSingleEvent(of: .value, with: { (snapShot) in
if let dictionary = snapShot.value as? [String: Any]{
// self.navigationItem.title = dictionary["name"] as? String
let user = User()
user.setValuesForKeys(dictionary)
self.setUpNavigationBarWithUser(user: user)
}
})`
if it is not finding your asking values, you are asking wrong directory. check firebase db child name it must be exactly like in your code ("Users")
I have been trying to implement Chris’ answer here: Can I make Firebase use a username login process? for the Facebook login but I can’t seem to get my head around it.
So far I’ve tried to set conditions on the textField but as Firebase observer works asynchronously, the conditions to check if the username exists in the database won’t work.
let usernameString = usernameTextField.text
let uid = FIRAuth.auth()?.currentUser?.uid
ref.runTransactionBlock({ (currentData: FIRMutableData) -> FIRTransactionResult in
if var post = currentData.value as? [String : AnyObject], let uid = FIRAuth.auth()?.currentUser?.uid {
let usernamesDictionary = post["usernames"] as! NSDictionary
for (key, _) in usernamesDictionary {
if key as? String == usernameString {
print("username not available: \(key)")
}
else if usernameString == "" {
print("Uh oh! Looks like you haven't set a username yet.")
}
else if key as? String != usernameString {
print("username available: \(key)")
print("All set to go!")
let setValue: NSDictionary = [usernameString!: uid]
post["usernames"] = setValue
currentData.value = post
}
}
return FIRTransactionResult.successWithValue(currentData)
}
return FIRTransactionResult.successWithValue(currentData)
}
Then I tried creating /usernames/ node in the database and set up rules as:
{
"rules": {
"usernames": {
".read": "auth != null",
".write": "newData.val() === auth.uid && !data.exists()"
}
}
}
Now that won’t let me set any username to the database. I get confused in creating rules but my whole point is that I need a sign up flow with the username data that’s unique for each user in the database.
While trying every answer I found in related posts, what worked for me the easy way i.e. without making Firebase rules play a part in it or creating a separate usernames node in the database was to not put an if/else condition inside the Firebase observer but instead to use the exists() method of FIRDataSnapshot.
Now here’s the trick, while I did try only the exists() method with a simple observer but that did not help me. What I did was first query usernames in order, then match the username with queryEqualToValue to filter the query:
refUsers.queryOrderedByChild("username").queryEqualToValue(usernameString).observeSingleEventOfType(.Value , withBlock: {
snapshot in
if !snapshot.exists() {
if usernameString == "" {
self.signupErrorAlert("Uh oh!", message: "Looks like you haven't set a username yet.")
}
else {
// Update database with a unique username.
}
}
else {
self.signupErrorAlert("Uh oh!", message: "\(usernameString!) is not available. Try another username.")
}
}) { error in
print(error.localizedDescription)
}
}
This is the first time out of most of the answers here that worked for me. But for now, I don’t know if this would scale. Post your experiences and best practices. They’ll be appreciated.
I'm have a key in my Firebase database called "users" which contain keys for email and name. I'm trying to create a simple query that will find a user based on email address, but the query is not returning any results.
let rootRef = FIRDatabase.database().reference()
let email = emailTextField.text
rootRef.child("users").queryEqualToValue(email, childKey: "users").observeEventType(.Value, withBlock: { snapshot in
if snapshot.exists() {
print("user exists")
} else if !snapshot.exists(){
print("user doesn't exist")
}
})
My console always prints "user doesn't exist" even if the email text field is identical to what is shown in my database.
Any ideas as to what's wrong?
Thanks!!
Try this:
let usersRef = self.rootRef.childByAppendingPath("users")
let email = emailTextField.text
usersRef.queryOrderedByChild("email").queryEqualToValue(email)
.observeEventType(.Value, withBlock: { snapshot in
if snapshot.exists() {
print("user exists")
} else {
print("user doesn't exist")
}
})
You need to be careful though... .Value will return all nodes that have an email address equal to the one you are looking for. In general that would be one, however, if there are 5, .Value will contain all 5 so it would be safer to iterate over the snapshot.
for child in snapshot.children {
let email = child.value["whatever key:value you want"] as! String
}