Firestore : How can I get whole data in Firestore? - firebase

Question

This ViewModel is about saving data in Firestore with specific data types.
import Foundation
import Firebase
import FirebaseStorage
import FirebaseStorageSwift
import UIKit
class UploadViewModel : ObservableObject {
#Published var loading : Bool = false
func storeImageWithUrl(images : [UIImage], completion : #escaping (_ urls : [String]) -> ()) {
self.loading = true
var count = 0
var urls : [String] = []
for image in images {
let ref = Storage.storage().reference(withPath: UUID().uuidString)
guard let imageData = image.jpegData(compressionQuality: 0.5) else {return}
ref.putData(imageData, metadata: nil) { metaData, error in
if let error = error {
print("failed to push image cause of error")
return
}
ref.downloadURL { url, error in
if let error = error {
print("error to make url")
return
}
guard let url = url else {return}
count += 1
urls.append(url.absoluteString)
if count == images.count {
completion(urls)
}
}
}
}
}
func storeItemInformation(title : String, description : String, category : String, contactInfo : String, price : String, imageUrls : [String], timeStamp : Date = Date(), saved : Bool = false, seller : String, completion : #escaping (_ result : Bool) -> ()) {
let uid = AuthService.instance.makeUid()
guard let userData = ["title": title, "description" : description, "category" : category, "price" : price, "imageURL" : imageUrls, "timestamp" : timeStamp, "contactInfo" : contactInfo, "saved" : saved, "seller" : seller] as? [String : Any] else { return }
Firestore.firestore()
.collection("Wholeitems")
.document(category)
.collection(uid)
.document(title)
.setData(userData) { error in
if let error = error {
print("Error to save whole Data")
completion(false)
return
}
print("Success to save whole data")
self.loading = false
completion(true)
}
}
}
Below code is about fetching data from Firestore with ItemModel.
import Foundation
import SwiftUI
import Firebase
import FirebaseAuth
class FeedViewModel : ObservableObject {
#Published var feeds : [ItemModel] = []
init() {
fetchItems()
print(feeds)
}
func fetchItems() {
Firestore.firestore()
.collection("Wholeitems")
.getDocuments { snapshot, error in
if let error = error {
print("error to get data")
return
}
if let snapshot = snapshot {
DispatchQueue.main.async {
self.feeds = snapshot.documents.map({ d in
return ItemModel(id: d.documentID,
category: d["category"] as? String ?? "",
contactInfo: d["contactInfo"] as? String ?? "",
description: d["description"] as? String ?? "",
price: d["price"] as? String ?? "",
timestamp: d["timestamp"] as? String ?? "",
title: d["title"] as? String ?? "",
saved : d["saved"] as? Bool ?? false,
seller: d["seller"] as? String ?? "",
imageURL: d["imageURL"] as? [String] ?? []
)
})
}
}
}
}
}
The problem is that I don't know why the feeds array is empty.
I tried to get all of the documents in the Firestore collection named Wholeitems. But, the array is empty.
Could you help me? Thanks!