Database.database() Error cannor find in scope> - ios

Question

I am trying to delete a table view cell in swift and when I delete the cell I also need to delete the data in firebase. So I use Database.database().child("tweet") this is where the error is it says cannot find Database in scope.
import UIKit
import Firebase
import Firestore
class TableViewController: UITableViewController {
var db:Firestore!
var tweetArray = [tweet]()
override func viewDidLoad() {
super.viewDidLoad()
tableView.allowsMultipleSelectionDuringEditing = true
db = Firestore.firestore()
loadData()
checkForUpdates()
}
override func tableView(_ tableView: UITableView, canEditRowAt indexPath: IndexPath) -> Bool {
return true
}
override func tableView(_ tableView: UITableView, commit editingStyle: UITableViewCell.EditingStyle, forRowAt indexPath: IndexPath) {
Database.database().child("tweet") "Error cannot find Database in scope"
}
func loadData() {
db.collection("tweet").getDocuments() {
querySnapshot, error in
if let error = error {
print("\(error.localizedDescription)")
}else{
self.tweetArray = querySnapshot!.documents.compactMap({tweet(dictionary: $0.data())})
DispatchQueue.main.async {
self.tableView.reloadData()
}
}
}
}
func checkForUpdates() {
db.collection("tweet").whereField("timeStamp", isGreaterThan: Date())
.addSnapshotListener {
querySnapshot, error in
guard let snapshots = querySnapshot else {return}
snapshots.documentChanges.forEach {
diff in
if diff.type == .added {
self.tweetArray.append(tweet(dictionary: diff.document.data())!)
DispatchQueue.main.async {
self.tableView.reloadData()
}
}
}
}
}
#IBAction func composeSweet(_ sender: Any) {
let composeAlert = UIAlertController(title: "Add Employee", message: "Add Employee", preferredStyle: .alert)
composeAlert.addTextField { (textField:UITextField) in
textField.placeholder = "Name"
}
composeAlert.addTextField { (textField:UITextField) in
textField.placeholder = "Adress"
}
composeAlert.addAction(UIAlertAction(title: "Cancel", style: .cancel, handler: nil))
composeAlert.addAction(UIAlertAction(title: "Add Employee", style: .default, handler: { (action:UIAlertAction) in
if let name = composeAlert.textFields?.first?.text,
let content = composeAlert.textFields?.last?.text {
let newTweet = tweet(name: name, content: content,timeStamp: Date())
var ref:DocumentReference? = nil
ref = self.db.collection("tweet").addDocument(data: newTweet.dictionary) {
error in
if let error = error {
print("Error adding document: \(error.localizedDescription)")
}else{
print("Document added with ID: \(ref!.documentID)")
}
}
}
}))
self.present(composeAlert, animated: true, completion: nil)
}
// MARK: - Table view data source
override func numberOfSections(in tableView: UITableView) -> Int {
return 1
}
override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return tweetArray.count
}
override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "Cell", for: indexPath)
let tweet1 = tweetArray[indexPath.row]
cell.textLabel?.text = "\(tweet1.name) \(tweet1.content)"
cell .detailTextLabel?.text = "\(tweet1.timeStamp) "
return cell
}
}
I tried importing different firebase imports and that didn't work i'm not sure if it has something to do with my cocoa pods. these are the cocapods I have downloaded: pod 'Firebase/Core
pod 'Firebase/Auth' pod 'Firestore'

Answer 1

Your code is reading data with:
db.collection("tweet").whereField("timeStamp", isGreaterThan: Date())
This is the API for Cloud Firestore, a NoSQL document database that is part of Firebase.
You then try to also access data with:
Database.database().child("tweet")
This is using the API for the Realtime Database, which is also a part of Firebase but it is a completely separate product with its own API.
To prevent more problems, use only the API for the database you're actually using, which seems to be Firestore. Have a look at the documentation on deleting data from Firestore