Decoding json data from back4app API - json

Question

I am having issues reading data from my back4app API into my swift project.I have connected my Back4app app to my swift project.Imported the necessary pods.
Below is how I connected my app to my swift project
import UIKit
import CoreData
import Parse
#main
class AppDelegate: UIResponder, UIApplicationDelegate {
func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
// Override point for customization after application launch.
let configuration = ParseClientConfiguration {
$0.applicationId = "KwLoFN7Rik2qadAS6dSpnNIv5E0Qd1Uu0nhvO1dt"
$0.clientKey = "RVNjTMvt5l73jt5GQxsg9GI16CDOiPAbEXiVPTY1"
$0.server = "https://parseapi.back4app.com"
}
Parse.initialize(with: configuration)
return true
}
This is the data model I am using to decode my json data.My json data follows this structure
import UIKit
struct restaurant: Decodable{
let objectId: String
let restaurant: String
let name: String
let description: String
let calories: String
let price: String
let ImageUrl: String
let type: String
let createdAt: String
let updatedAt: String
}
struct restaurants: Decodable{
let restaurants : [restaurant]
}
In my viewdidload() method I check if my swift project has successfully connected to my back4app app and then I try retrieving the data using the url but I keep getting an error and I'm not sure what's it is
import UIKit
import Parse
class ViewController: UIViewController {
var restaurantStruct : restaurants? = nil
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view.
testParseConnection()
if let url = URL(string:"https://parseapi.back4app.com/classes/restaurants"){
let session = URLSession.shared
session.dataTask(with: url) { [self] (data, response, err) in
guard let jsonData = data else {
return
}
do {
let decoder = JSONDecoder()
let artworkList = try decoder.decode(restaurants.self, from: jsonData)
self.restaurantStruct = artworkList
DispatchQueue.main.async {
print(self.restaurantStruct ?? " ")
}
print(self.restaurantStruct!)
}
catch let jsonErr {
print("Error decoding JSON", jsonErr)
}
}
.resume()
}
func testParseConnection(){
let myObj = PFObject(className:"FirstClass")
myObj["message"] = "Hey ! First message from Swift. Parse is now connected"
myObj.saveInBackground { (success, error) in
if(success){
print("You are connected!")
}
else{
print("An error has occurred!")
}
}
}
}
}
This is the error that I see in my terminal
You are connected!
Error decoding JSON keyNotFound(CodingKeys(stringValue: "restaurants", intValue: nil), Swift.DecodingError.Context(codingPath: [], debugDescription: "No value associated with key CodingKeys(stringValue: \"restaurants\", intValue: nil) (\"restaurants\").", underlyingError: nil))
using parse to read data
var query = PFQuery(className:"SoccerPlayers")
query.getObjectInBackgroundWithId("HMcTr9rD3s") {
(soccerPlayers: PFObject?, error: NSError?) -> Void in
if error == nil && soccerPlayers != nil {
print(soccerPlayers)
} else {
print(error)
}
}

Answer 1

If you get an error like {"error":"unauthorized"}, you should use MasterKey but this dangerous for client side.
You can use sessionToken for authorized. But if you don`t know for now.
You can change CLP-Class level permissions from dashboard. You can open your app in back4app, and open the related Class. Do it public read and public write.