Iterate through emails in Firebase - Swift - swift

Question

I am currently trying to iterate through all user emails in firebase, however, whenever I run my code, and try to add the "test#gmail.com" user, there is an error. However, when I try to add my current user's email address, "test1#gmail.com", there is a success.
Below is a snippet of my code demonstrating this. B
Below is also an image showing the structure of my current database.
Note that each user's email is under a unique userID under the "users" part of the database.
Iterating through email snippet.
func searchEmails() {
var ref : DatabaseReference
let currentUserID = Auth.auth().currentUser?.uid
ref = Database.database().reference()
let userRef = ref.child("users")
userRef.observeSingleEvent(of: .value, with: { snapshot in
let enumerator = snapshot.children
while let rest = enumerator.nextObject() as? DataSnapshot {
userRef.child(rest.key).child("email").observe(.value, with: { snapshot in
print(snapshot.value!)
// print("Other rest is this \(otherRest.value!) value")
if(snapshot.value as? String == self.shareEmail.text) {
SVProgressHUD.showSuccess(withStatus: "Request sent to user!")
}
else {
SVProgressHUD.showError(withStatus: "Email not valid.")
}
})
}
})
SVProgressHUD.dismiss()
}

Answer 1

Why don't you try this, Might turn out to be much less headache.. :-
if self.shareEmail.text != "" && self.shareEmail.text.isEmpty == false{
Database.database().reference().child("users").queryOrdered(byChild: "email").queryEqual(toValue: "somemail").observe(.value, with: {(Snapshot) in
if Snapshot.exists(){
// The email that you have been searching for exists in the
// database under some particular userID node which can
// be retrieved from ....
print(Snapshot)
}else{
// No such email found
}
}, withCancel: {(error) in
// Handle any error occurred while making the call to firebase
})
}else{
//Your textfield must not be empty;.... Handle that error
}
Note : This is only gonna work if Firebase Security rules allow it... so you might have to work on that on your console... Good luck!