can't get alamofire Xcode json parse to work on yahoo API

Question

I can't get alamofire to work on Xcode. I'm trying to json parse yahoo API and it won't work . for start i jut wanted to parse and print one element in of "struct Stock: Codable " which is "symbol"

any help would be appreciated

import UIKit
import SwiftUI
import UserNotifications
import Alamofire

struct QuoteParent: Codable {
    var quoteResponse: QuoteResponse
    init() {
        quoteResponse = QuoteResponse()
    }
}

struct QuoteResponse: Codable {
    var error: QuoteError?
    var result: [Stock]?
    init() {
        error = nil
        result = []
    }
}

struct QuoteError: Codable {
    var lang: String?
    var description: String?
    var message: String?
    var code: Int?
    init() {
        lang = ""
        description = ""
        message = ""
        code = 0
    }
}

struct Stock: Codable {
    var language : String?
    var region : String?
    var quoteType : String?
    var typeDisp : String?
    var quoteSourceName : String?
    var triggerable : String?
    var customPriceAlertConfidence : String?
    var exchange : String?
    var exchangeTimezoneName : String?
    var exchangeTimezoneShortName : String?
    var gmtOffSetMilliseconds : String?
    var market : String?
    var esgPopulated : String?
    var marketState : String?
    var firstTradeDateMilliseconds : String?
    var priceHint : String?
    var preMarketTime : String?
    var preMarketPrice : String?
    var regularMarketTime : String?
    var regularMarketPrice : String?
    var fullExchangeName : String?
    var sourceInterval : String?
    var exchangeDataDelayedBy : String?
    var tradeable : String?
    var symbol : String?
}

here is my code at the JSONDecoder line it throw me to catch error

thank you

     let url = "https://query1.finance.yahoo.com/v7/finance/quote?lang=en-US&region=US&corsDomain=finance.yahoo.com&symbols=FB"
       
var quoteParent = QuoteParent()
        let req = AF.request(url, parameters: ["quoteResponse": "result"])
        req.responseData { (response) in
                guard let data = response.value else {return}
                do {
                    quoteParent = try JSONDecoder().decode(QuoteParent.self, from: data)
                    let stock = quoteParent.quoteResponse.result?[0]
                    let symbol = stock?.symbol?.uppercased() ?? ""
                    print(symbol)
                    
                    
                } catch {
                    print(error)
                }
        }
      

Answer 1

Try to use responseDecodable instead,

  req.responseDecodable(of: QuoteParent.self) { response in
            let stock = response.value?.quoteResponse.result?[0]
            let symbol = stock?.symbol?.uppercased() ?? ""
            print(symbol)
  }

Declare the struct properties with the correct data type

struct Stock: Codable {
    var language : String?
    var region : String?
    var quoteType : String?
    var typeDisp : String?
    var quoteSourceName : String?
    var customPriceAlertConfidence : String?
    var exchange : String?
    var exchangeTimezoneName : String?
    var exchangeTimezoneShortName : String?
    var symbol : String?
    var market : String?
    var fullExchangeName : String?
    var marketState : String?
    var gmtOffSetMilliseconds : Double?
    var firstTradeDateMilliseconds : Double?
    var priceHint : Double?
    var preMarketTime : Double?
    var preMarketPrice : Double?
    var regularMarketTime : Double?
    var regularMarketPrice : Double?
    var sourceInterval : Double?
    var exchangeDataDelayedBy : Double?
    var tradeable : Bool?
    var esgPopulated : Bool?
    var triggerable : Bool?
}

And the result is "FB"