Writing User Data to Firebase After Creating New User Account - swift

Question

I am currently trying to write the users information to firebase's database after using the create user function FIRAuth.auth()?.createUser
Under this function I attempt to insert the data into the database like this:
FIRAuth.auth()?.createUser(withEmail: self.emailField.text!, password: self.passwordField.text!) { (user, error) in
if error == nil
{
let email = self.emailField.text
let firstName = self.firstnameField.text
let lastName = self.lastnameField.text
self.ref.child((user?.uid)!).setValue(["firstName": firstName,"lastName": lastName,"email": email])
self.performSegue(withIdentifier: "createaccountLandingPage", sender: sender)
}
It also may be important to mention that under my view controller I create the reference to the database using:
var ref = FIRDatabase.database().reference().child("users") //root database
My outlets are all correct, but I am getting this error:
Thread 1: signal SIGABRT
Any suggestions on what I may be doing incorrectly?
EDIT** Here is all my code in the signup view controller
import UIKit
import Firebase
import FirebaseDatabase
class CreateAccountViewController: UIViewController {
var ref = FIRDatabase.database().reference().child("users") //root database
#IBOutlet weak var firstnameField: UITextField!
#IBOutlet weak var lastnameField: UITextField!
#IBOutlet weak var emailField: UITextField!
#IBOutlet weak var passwordField: UITextField!
#IBOutlet weak var confirmpasswordField: UITextField!
#IBOutlet weak var createAccountButton: UIButton!
override func viewDidLoad() {
super.viewDidLoad()
if (FIRAuth.auth()?.currentUser) != nil
{
}
else
{
}
// Do any additional setup after loading the view.
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
#IBAction func createAccountAction(_ sender: AnyObject)
{
if self.confirmpasswordField.text != self.passwordField.text
{
}
else
{
FIRAuth.auth()?.createUser(withEmail: self.emailField.text!, password: self.passwordField.text!) { (user, error) in
if error == nil
{
let user = FIRAuth.auth()?.currentUser.uid
let email = self.emailField.text
let firstName = self.firstnameField.text
let lastName = self.lastnameField.text
self.ref.child("users").child("\(user)").setValue(["firstName": firstName,"lastName": lastName,"email": email])
self.performSegue(withIdentifier: "createaccountLandingPage", sender: sender)
}
else
{
let alertController = UIAlertController(title: "Oops!", message: error?.localizedDescription, preferredStyle: .alert)
let defaultAction = UIAlertAction(title: "OK", style: .cancel, handler: nil)
alertController.addAction(defaultAction)
self.present(alertController, animated: true, completion: nil)
}
}
}
}
EDIT*** here is a screenshot of the error
EDIT**** here is a screenshot of my podfile and when it is updated I recieve no errors in the terminal.
EDIT***** Screenshots of console.
1stScreenshotConsole
2ndScreenshotConsole

Answer 1

You have to create a reference to your database like this
Var ref: FIRDatabaseReference!
Then you initialize your database in your viewDidLoad like this
Ref = FIRDatabase.database().reference()
I wrote the whole code below, excuse the syntax errors because I am answering your question on an iPad.
import UIKit
import Firebase
import FirebaseDatabase
class CreateAccountViewController: UIViewController {
var ref = FIRDatabaseReference! //create a reference for your database
#IBOutlet weak var firstnameField: UITextField!
#IBOutlet weak var lastnameField: UITextField!
#IBOutlet weak var emailField: UITextField!
#IBOutlet weak var passwordField: UITextField!
#IBOutlet weak var confirmpasswordField: UITextField!
#IBOutlet weak var createAccountButton: UIButton!
override func viewDidLoad() {
super.viewDidLoad()
//initialize your database
ref = FIRDatabase.database().reference()
// Do any additional setup after loading the view.
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
#IBAction func createAccountAction(_ sender: AnyObject)
{
if self.confirmpasswordField.text != self.passwordField.text
{
}
else
{
FIRAuth.auth()?.createUser(withEmail: self.emailField.text!, password: self.passwordField.text!) { (user, error) in
if error == nil
{
let user = FIRAuth.auth()?.currentUser.uid //get the users UID after registering
let email = self.emailField.text
let firstName = self.firstnameField.text
let lastName = self.lastnameField.text
self.ref.child("users").child("\(user!)").setValue(["firstName": "\(firstName!)", "lastName": "\(lastName!)", "email": "\(email!)"])
self.performSegue(withIdentifier: "createaccountLandingPage", sender: sender)
}
else
{
let alertController = UIAlertController(title: "Oops!", message: error?.localizedDescription, preferredStyle: .alert)
let defaultAction = UIAlertAction(title: "OK", style: .cancel, handler: nil)
alertController.addAction(defaultAction)
self.present(alertController, animated: true, completion: nil)
}
}
}
}