I am trying to do a ForEach loop that lists all of the social medias a user might have. This would be on a scrollable list, the equivalent of music streaming apps have a list of all the songs you save in your library. The user's social medias list is in reality a dictionary .
My MainViewModel class implements all of the Firebase functionality. See below.
class MainViewModel: ObservableObject {
@Published var errorMessage = ""
@Published var user: User?
init() {
DispatchQueue.main.async {
self.isUserCurrentlyLoggedOut = FirebaseManager.shared.auth.currentUser?.uid == nil
}
readCodableUserWithMap()
}
@Published var isUserCurrentlyLoggedOut = false
func handleSignOut() {
isUserCurrentlyLoggedOut.toggle()
try? FirebaseManager.shared.auth.signOut()
}
func readCodableUserWithMap() {
guard let uid = FirebaseManager.shared.auth.currentUser?.uid else {
self.errorMessage = "Could not find firebase uid"
print("FAILED TO FIND UID")
return
}
let userID = uid
let docRef = FirebaseManager.shared.firestore.collection("users").document(userID)
docRef.getDocument { (document, error) in
if let err = error {
print(err.localizedDescription)
return
}
if let doc = document {
let user = try! doc.data(as: User.self)
if let mappedField = user.socials {
mappedField.forEach { print($0.key, $0.value) }
}
}
}
}
}
readCodableUserWithMap() is supposed to initialize my codable struct, which represents a user. See below.
struct User: Identifiable, Codable {
@DocumentID var id: String?
var socials: [String: String]?
var uid, email, name, bio, profileImageUrl: String?
var numSocials, followers, following: Int?
}
QUESTION AT HAND: In my Dashboard View, I am trying to have a list of all the social medias a user can have. I can't manage to make a ForEach loop for my user.
I do:
ForEach(vm.user?.socials.sorted(by: >), id: \.key) { key, value in
linkDisplay(social: key, handler: value)
.listRowSeparator(.hidden)
}.onDelete(perform: delete)
This gives me the following errors:
Value of optional type '[Dictionary<String, String>.Element]?' (aka 'Optional<Array<(key: String, value: String)>>') must be unwrapped to a value of type '[Dictionary<String, String>.Element]' (aka 'Array<(key: String, value: String)>')
Value of optional type '[String: String]?' must be unwrapped to refer to member 'sorted' of wrapped base type '[String: String]'
I have tried coalescing using?? but that doesn't work, although I assume I am doing something wrong. Force-unwrapping is something I tried but it made the app crash when it was an empty dictionary.
Just in case, here is the database hierarchy: firebase hierarchy
TLDR: HOW can I make a ForEach loop to list all of my user's medias?
You have both vm.user
and socials
as optionals. The ForEach
loop requires non-optionals, so you could try the following approach to unwrap those for the ForEach
loop.
if let user = vm.user, let socials = user.socials {
ForEach(socials.sorted(by: > ), id: \.key) { key, value in
linkDisplay(social: key, handler: value)
.listRowSeparator(.hidden)
}.onDelete(perform: delete)
}
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