Completion Func to get data from firestore
struct User {
let docID: String
let firstName: String
}
var userArray = [User]()
// ...
//....
func getUserData(completion: #escaping ([User]) -> Void) {
var result = [User]()
guard let userID = Auth.auth().currentUser?.uid else {return}
let db = Firestore.firestore()
db.collection("users").whereField("uid", isEqualTo: userID)
.getDocuments() { (querySnapshot, err) in
if let err = err {
print("Error getting documents: \(err)")
completion(result)
return
}
else {
if let snapshot = querySnapshot {
for document in snapshot.documents {
let data = document.data()
let docid = data["docID"] as? String ?? ""
let firstName = data["firstName"] as? String ?? ""
let lastName = data["lastName"] as? String ?? ""
let email = data["email"] as? String ?? ""
let UData = User(docID: docid, firstName: firstName)
result.append(UData)
print(result)
}
}
} //end ELSE
completion(result)
}
}
Calling it here in viewWillAppear
override func viewWillAppear(_ animated: Bool) {
getUserData{ (result) in
self.userArray.append(contentsOf: result)
print(self.userArray)
}
}
Prints the following
[DaDoc.HomeViewController.User(docID: "avGhsRI1x0c", firstName: "Raul")]
Question
Why is "DaDoc.HomeViewController.User" This being appended to the array?
i can't unwrap it with "!" throws an error "Cannot force unwrap value of non-optional type '[HomeViewController.User]'"
How can i access keys in here (docID, firstName)
[DaDoc.HomeViewController.User(docID: "avGhsRI1x0c", firstName: "Raul")]
Anyhelp is appreciated!
UPDATE:
Thanks for the suggestions #jawadAli - Moving struct outside the class worked
Even thought my result still printed as below
[DaDoc.User(docID: "avGhsRI1x0c", firstName: "Raul")].
I was able to access keys to add to values to a tableView like below:
cell.firstNameLabel?.text = userArray[indexPath.row].firstName
Related
I have my user struct with has a dictionary of all their social medias.
struct User: Identifiable {
var id: String { uid }
let uid, email, name, bio, profileImageUrl: String
let numSocials, followers, following: Int
var socials: [String: String]
init(data: [String: Any]) {
self.uid = data["uid"] as? String ?? ""
self.email = data["email"] as? String ?? ""
self.name = data["name"] as? String ?? ""
self.bio = data["bio"] as? String ?? ""
self.profileImageUrl = data["profileImageURL"] as? String ?? ""
self.numSocials = data["numsocials"] as? Int ?? 0
self.followers = data["followers"] as? Int ?? 0
self.following = data["following"] as? Int ?? 0
self.socials = data["socials"] as? [String: String] ?? [:]
}
}
The idea is for socials (the dictionary), to be dynamic, since users can add and remove social medias. Firestore looks like this:
The dictionary is initialized as empty. I have been able to add elements to the dictionary with this function:
private func addToStorage(selectedMedia: String, username: String) -> Bool {
if username == "" {
return false
}
guard let uid = FirebaseManager.shared.auth.currentUser?.uid else {
print("couldnt get uid")
return false
}
FirebaseManager.shared.firestore.collection("users").document(uid).setData([ "socials": [selectedMedia:username] ], merge: true)
print("yoo")
return true
}
However I can't seem to read the firestore map into my swiftui dictionary. I want to do this so that I can do a ForEach loop and list all of them. If the map is empty then the list would be empty too, but I can't figure it out.
Just in case, here is my viewmodel.
class MainViewModel: ObservableObject {
#Published var errorMessage = ""
#Published var user: User?
init() {
DispatchQueue.main.async {
self.isUserCurrentlyLoggedOut = FirebaseManager.shared.auth.currentUser?.uid == nil
}
fetchCurrentUser()
}
func fetchCurrentUser() {
guard let uid = FirebaseManager.shared.auth.currentUser?.uid else {
self.errorMessage = "Could not find firebase uid"
print("FAILED TO FIND UID")
return
}
FirebaseManager.shared.firestore.collection("users").document(uid).getDocument { snapshot, error in
if let error = error {
self.errorMessage = "failed to fetch current user: \(error)"
print("failed to fetch current user: \(error)")
return
}
guard let data = snapshot?.data() else {
print("no data found")
self.errorMessage = "No data found"
return
}
self.user = .init(data: data)
}
}
}
TLDR: I can't figure out how to get my firestore map as a swiftui dictionary. Whenever I try to access my user's dictionary, the following error appears. If I force unwrap it crashes during runtime. I tried to coalesce with "??" but I don't know how to make it be the type it wants.
ForEach(vm.user?.socials.sorted(by: >) ?? [String:String], id: \.key) { key, value in
linkDisplay(social: key, handler: value)
.listRowSeparator(.hidden)
}.onDelete(perform: delete)
error to figure out
Please be patient. I have been looking for answers through SO and elsewhere for a long time. This is all new to me. Thanks in advance.
This is a two part answer; Part 1 addresses the question with a known set of socials (Github, Pinterest, etc). I included that to show how to map a Map to a Codable.
Part 2 is the answer (TL;DR, skip to Part 2) so the social can be mapped to a dictionary for varying socials.
Part 1:
Here's an abbreviated structure that will map the Firestore data to a codable object, including the social map field. It is specific to the 4 social fields listed.
struct SocialsCodable: Codable {
var Github: String
var Pinterest: String
var Soundcloud: String
var TikTok: String
}
struct UserWithMapCodable: Identifiable, Codable {
#DocumentID var id: String?
var socials: SocialsCodable? //socials is a `map` in Firestore
}
and the code to read that data
func readCodableUserWithMap() {
let docRef = self.db.collection("users").document("uid_0")
docRef.getDocument { (document, error) in
if let err = error {
print(err.localizedDescription)
return
}
if let doc = document {
let user = try! doc.data(as: UserWithMapCodable.self)
print(user.socials) //the 4 socials from the SocialsCodable object
}
}
}
Part 2:
This is the answer that treats the socials map field as a dictionary
struct UserWithMapCodable: Identifiable, Codable {
#DocumentID var id: String?
var socials: [String: String]?
}
and then the code to map the Firestore data to the object
func readCodableUserWithMap() {
let docRef = self.db.collection("users").document("uid_0")
docRef.getDocument { (document, error) in
if let err = error {
print(err.localizedDescription)
return
}
if let doc = document {
let user = try! doc.data(as: UserWithMapCodable.self)
if let mappedField = user.socials {
mappedField.forEach { print($0.key, $0.value) }
}
}
}
}
and the output for part 2
TikTok ogotok
Pinterest pintepogo
Github popgit
Soundcloud musssiiiccc
I may also suggest taking the socials out of the user document completely and store it as a separate collection
socials
some_uid
Github: popgit
Pinterest: pintepogo
another_uid
Github: git-er-done
TikTok: dancezone
That's pretty scaleable and allows for some cool queries: which users have TikTok for example.
I am trying to get data from firestore collection and assign it to an array of dictionaries. for this part of the code below... i get the error "Cast from 'QuerySnapshot?' to unrelated type '[[String : Any]]' always fails" and the console prints "is not working".
guard let snap = snapshot as? [[String:Any]] else {
print("is not working")
completion(.failure(DatabaseError.failedToFetch))
return
}
Here is the full code.
// fetches and returns all conversations for the user with passed in uid
public func getAllConversations(for uid: String, completion: #escaping(Result<[Conversation], Error>) -> Void) {
print("fetching all convos")
//NEW
let db = Firestore.firestore()
let CurrentUser = Auth.auth().currentUser?.uid
let ListRef = db.collection("users").document(CurrentUser!).collection("conversations")
// fetch the current users convo list
ListRef.getDocuments { snapshot, error in
if let err = error {
debugPrint("Error fetching documents: \(err)")
} else {
guard let snap = snapshot as? [[String:Any]] else {
print("is not working")
completion(.failure(DatabaseError.failedToFetch))
return
}
print("is working")
let conversations: [Conversation] = snap.compactMap({ dictionary in
guard let id = dictionary["id"] as? String,
let name = dictionary["name"] as? String,
let otherUserUID = dictionary["other_user-uid"] as? String,
let latestMessage = dictionary["latest-message"] as? [String:Any],
let date = latestMessage["date"] as? String,
let message = latestMessage["message"] as? String,
let isRead = latestMessage["is-read"] as? Bool else {
return nil
}
//save other user ID to a global var
self.test = otherUserUID
//assign data into an array of dictionaries
let latestConvoObject = LatestMessage(date: date, text: message, isRead: isRead)
return Conversation(id: id, name: name, otherUserUid: otherUserUID, latestMessage: latestConvoObject)
})
completion(.success(conversations))
}
}
}
There are a numbers of way to read that data, and the process can be simplified by conforming objects to the codable protocol but let me provide a straight forward example. I don't know what your Conversation object looks like so here's mine
class ConversationClass {
var from = ""
var to = ""
var msg = ""
var timestamp = 0
convenience init(withDoc: DocumentSnapshot) {
self.init()
self.from = withDoc.get("from") as? String ?? "no from"
self.to = withDoc.get("to") as? String ?? "no to"
self.msg = withDoc.get("msg") as? String ?? "no msg"
self.timestamp = withDoc.get("timestamp") as? Int ?? 0
}
}
and then here's the the code that reads in all the conversation documents from a Collection, stores each in a ConversationClass object, puts those in an array and returns it through an escaping completion handler
func getConversations(completion: #escaping( [ConversationClass] ) -> Void) {
let conversationCollection = self.db.collection("conversations")
conversationCollection.getDocuments(completion: { snapshot, error in
if let err = error {
print(err.localizedDescription)
return
}
guard let docs = snapshot?.documents else { return }
var convoArray = [ConversationClass]()
for doc in docs {
let convo = ConversationClass(withDoc: doc)
convoArray.append(convo)
}
completion(convoArray)
})
}
I am trying to fetch data from firebase firestore. The problem i have is that my fetch is returning the results x4 times. For example when i do print(name) it print the users name x4 times.
I think there may be a loop that is not working correctly?
// fetches and returns all conversations for the user with passed in uid
public func getAllConversations(for uid: String, completion: #escaping(Result<[Conversation], Error>) -> Void) {
let CurrentUser = Auth.auth().currentUser?.uid
let db = Firestore.firestore()
let ConversationRef = db.collection("users").document(CurrentUser!).collection("conversations").document(
"jVymlfbpuAYQQ9Brf8SbUZ7KCGg1")
// get the otherUserUId TO DO
ConversationRef.getDocument { snapshot, error in
if error != nil {
print("Error connecting to database")
} else {
if let document = snapshot {
if document.exists {
let data = document.data()
print(data)
let conversations: [Conversation] = data!.compactMap ({ dictionary in
guard let conversationId = data!["id"] as? String,
let name = data!["name"] as? String,
let otherUserUid = data!["other_user-uid"] as? String,
let latestMessage = data!["latest-message"] as? [String:Any],
let date = latestMessage["date"] as? String,
let message = latestMessage["message"] as? String,
let isRead = latestMessage["is-read"] as? Bool
else {
return nil
}
print(name)
let latestMessageObject = LatestMessage(date: date, text: message, isRead: isRead)
return Conversation(id: conversationId, name: name, otherUserUid: otherUserUid, latestMessage: latestMessageObject)
})
completion(.success(conversations))
}
else {
completion(.failure(DatabaseError.failedToFetch))
return
}
}
}
}
}
Please note that ConversationRef.getDocument{..} will only Return One Specific Document, which you’re Referring here :
let ConversationRef = db.collection("users").document(CurrentUser!).collection("conversations").document("jVymlfbpuAYQQ9Brf8SbUZ7KCGg1”)
So the let data = document.data()
will be single [String:Any] object(in this case Single ‘Conversation’),
not the Array of Dictionaries(eg: [Conversations]).
Try doing it this way:
// fetches and returns all conversations for the user with passed in uid
public func getAllConversations(for uid: String, completion: #escaping(Result<Conversation, Error>) -> Void) {
let CurrentUser = Auth.auth().currentUser?.uid
let db = Firestore.firestore()
let ConversationRef = db.collection("users").document(CurrentUser!).collection("conversations").document(
"jVymlfbpuAYQQ9Brf8SbUZ7KCGg1")
// get the otherUserUId TO DO
ConversationRef.getDocument { snapshot, error in
if error != nil {
print("Error connecting to database")
} else {
if let document = snapshot {
if document.exists {
if let data = document.data() {
if let conversationId = data["id"] as? String,
let name = data["name"] as? String,
let otherUserUid = data["other_user-uid"] as? String,
let latestMessage = data["latest-message"] as? [String:Any],
let date = latestMessage["date"] as? String,
let message = latestMessage["message"] as? String,
let isRead = latestMessage["is-read"] as? Bool {
print(name)
let latestMessageObject = LatestMessage(date: date, text: message, isRead: isRead)
let conversations = Conversation(id: conversationId, name: name, otherUserUid: otherUserUid, latestMessage: latestMessageObject)
completion(.success(conversations))
}
}
}
else {
completion(.failure(DatabaseError.failedToFetch))
return
}
}
}
}
}
// fetches and returns all conversations for the user with passed in uid
public func getAllConversations(for uid: String, completion: #escaping(Result<[Conversation], Error>) -> Void) {
let CurrentUser = Auth.auth().currentUser?.uid
let db = Firestore.firestore()
let ConversationRef = db.collection("users").document(CurrentUser!).collection("conversations")
ConversationRef.addSnapshotListener { snapshot, error in
if error != nil {
print("Error connecting to database")
} else {
guard let snap = snapshot else {
completion(.failure(DatabaseError.failedToFetch))
return
}
for document in snap.documents {
let data = document.data()
print(data)
guard let conversationId = data["id"] as? String,
let name = data["name"] as? String,
let otherUserUid = data["other_user-uid"] as? String,
let latestMessage = data["latest-message"] as? [String:Any],
let date = latestMessage["date"] as? String,
let message = latestMessage["message"] as? String,
let isRead = latestMessage["is-read"] as? Bool else {
return
}
print(name)
let latestMessageObject = LatestMessage(date: date, text: message, isRead: isRead)
let conversations = [Conversation(id: conversationId, name: name, otherUserUid: otherUserUid, latestMessage: latestMessageObject)]
completion(.success(conversations))
}
}
}
}
I have two structs, one nested within the other:
struct User {
let uid: String
let name: String
var pack: [Doggo]
}
struct Doggo {
let dogUid: String
let dogName: String
let dogBreed: String
let dogBorn: String
let dogProfileImageURL: String
}
Is the following code the proper way to access the firebase data for each?
guard let userUid = Auth.auth().currentUser?.uid else { return }
let userRef = self.db.collection("users").document(userUid)
let packRef = self.db.collection("users").document(userUid).collection("pack")
userRef.getDocument { (document, error) in
if let document = document, document.exists {
let data = document.data()
let name = data?["name"] as? String ?? "Anonymous"
packRef.getDocuments(completion: { (snapshot, error) in
if let err = error {
debugPrint("Error fetchings docs: \(err)")
} else {
guard let snap = snapshot else { return }
for document in snap.documents {
let data = document.data()
let dogUid = data["dogUid"] as? String ?? "No dogUid"
let dogName = data["dogName"] as? String ?? "No dogName"
let dogBreed = data["dogBreed"] as? String ?? "No dogBreed"
let dogBorn = data["dogBorn"] as? String ?? "No dogBorn"
let dogProfileImageURL = data["dogProfileImageURL"] as? String ?? "No dogProfileImageURL"
let newDoggo = Doggo(dogUid: dogUid, dogName: dogName, dogBreed: dogBreed, dogBorn: dogBorn, dogProfileImageURL: dogProfileImageURL)
self.doggos.append(newDoggo)
print(newDoggo)
}
}
self.user = User(uid: userUid, name: name, pack: self.doggos)
print(self.user)
self.configureHomeController()
self.configureMenuController()
})
} else {
print("Document does not exist")
}
}
It appears to work the way I'd like it to, but I don't want to run into issues down the line as it's quite foundational to the rest of the app.
I am trying to retrieve a user's data from firestore, after migrating my data there from firebase. The code below was working fine with firebase, and retrieved the user's data.
However, after changing the query to firestore query, I got this error.
Print statement here "document.data()" contains the data, But I got this error. I don't know where this error is coming from.
When I compare document.data() with nil, I got "Document data: contains nil".
I don't know how I suppoused to get the data.
here is the code where I get the error,
static func getUser(uid: String, setUserDefaults: #escaping (NormalUser) -> Void){
DataService.ds.REF_USERS_NORMAL.document(uid).getDocument { (document, error) in
if error != nil{
print("\(String(describing: error?.localizedDescription))")
}else{
if document != nil{
let data = document?.data() as! [String: String]
print("Document data: \(String(describing: document?.data() as! [String: String]))")
let user = NormalUser(userData: (data as Dictionary<String, AnyObject>))
setUserDefaults(user)
}else{
print("Document data: contains nil")
}
}
}
}
Here is how I defined the variables,
import Foundation
import Firebase
class NormalUser: User {
private var _email: String?
private var _city: String?
private var _country: String?
private var _name: String?
private var _phone: String?
private var _profileImgUrl: String?
var email: String {
return _email!
}
var city: String {
return _city!
}
var country: String {
return _country!
}
var name: String {
return _name!
}
var phone: String {
return _phone!
}
var profileImgUrl: String {
set{
self.profileImgUrl = _profileImgUrl!
}
get{
if let pI = _profileImgUrl{
return pI
}
return ""
}
}
init(userData: Dictionary<String, AnyObject>) {
super.init(userId: userData["uid"] as! String, user: userData)
if let email = userData["email"] as? String {
self._email = email
}
if let city = userData["city"] as? String {
self._city = city
}
if let country = userData["country"] as? String {
self._country = country
}
if let name = userData["name"] as? String {
self._name = name
}
if let phone = userData["phone"] as? String {
self._phone = phone
}
if let profileImgUrl = userData["imgUrl"] as? String {
self._profileImgUrl = profileImgUrl
}
}
static func createNormalUser(uid: String, userData: Dictionary<String, String>) {
// add user to database
//DataService.ds.REF_USERS_NORMAL.child(uid).setValue(userData)
DataService.ds.REF_USERS_NORMAL.document(uid).setData(userData) { (err) in
if let err = err {
print("Error writing document: \(err)")
} else {
print("Document successfully written!")
}
}
addUserToGroup(uid:uid, group:"normal")
}
static func updateUserProfile(uid: String, userData: Dictionary<String, String>) {
//DataService.ds.REF_USERS_NORMAL.child(uid).updateChildValues(userData)
DataService.ds.REF_USERS_NORMAL.document(uid).updateData(userData)
}
static func getUser(uid: String, setUserDefaults: #escaping (NormalUser) -> Void){
DataService.ds.REF_USERS_NORMAL.document(uid).getDocument { (document, error) in
if error != nil{
print("\(String(describing: error?.localizedDescription))")
}else{
if document != nil{
let data = document?.data() as! [String: String]
print("Document data: \(String(describing: document?.data() as! [String: String]))")
let user = NormalUser(userData: (data as Dictionary<String, AnyObject>))
setUserDefaults(user)
}else{
print("Document data: contains nil")
}
}
}
}
}
I solved the issue!
For any one who may come across this error, the problem was with userId. I was getting the user id from firebase, which, in my case, no longer serves my query, and eventually getting a nil. When I got the ID directly from authentication,
let userID = Auth.auth().currentUser?.uid
It SOLVED the issue!