Error when decoding JSON - keyNotFound(CodingKeys

Question

I am trying to parse JSON data over the network. Below you can see where the magic is happening.

func getBookingsForDate(date: String, completionHandler: @escaping ([String:String]) -> Void ){

struct bookings: Codable {

    var bookieName : String
    var bookieNumber: String
    var booked: String
    var bookingTime: String

    private enum Codingkeys: String, CodingKey{

        case bookieName
        case bookieNumber
        case booked
        case bookingTime
    }
}

let params = ["date":date]

let urlString = "http://mscissorss.pythonanywhere.com/getBookings/"
Alamofire.request(urlString, method: .get, parameters: params).responseJSON {
    response in
    switch response.result {
    case .success(let JSON):

        let decoder = JSONDecoder()
        guard let _ = response.data else{
            return
        }
        do {
            let loginDetails = try decoder.decode(bookings.self, from: response.data!)
            print(loginDetails)
        } catch let err{
            print(err)
        }

        //let bookings = JSON as! NSDictionary
        //completionHandler(JSON)
        /*
        do {
            let decoder = JSONDecoder()
            let gitData = try decoder.decode(bookings.self, from: JSON)
            print(gitData.bookieName)

        } catch let err {
            print("Err", err)
        }
        */
        break
    case .failure(let error):
        print(error)
    }
}
}

Given the code i am getting the following error message:

keyNotFound(CodingKeys(stringValue: "bookieName", intValue: nil), Swift.DecodingError.Context(codingPath: [], debugDescription: "No value associated with key CodingKeys(stringValue: \"bookieName\", intValue: nil) (\"bookieName\").", underlyingError: nil))

And the JSON response that i am getting looks like this:

{
    0 =     {
        booked = false;
        bookieName = "";
        bookieNumber = "";
        bookingTime = "10:00";
    };
    1 =     {
        booked = false;
        bookieName = "";
        bookieNumber = "";
        bookingTime = "10:30";
    };
    10 =     {
        booked = false;
        bookieName = "";
        bookieNumber = "";
        bookingTime = "15:00";
    };
    11 =     {
        booked = false;
        bookieName = "";
        bookieNumber = "";
        bookingTime = "15:30";
    };
    12 =     {
        booked = false;
        bookieName = "";
        bookieNumber = "";
        bookingTime = "16:00";
    };
    13 =     {
        booked = false;
        bookieName = "";
        bookieNumber = "";
        bookingTime = "16:30";
    };
    14 =     {
        booked = false;
        bookieName = "";
        bookieNumber = "";
        bookingTime = "17:00";
    };
    15 =     {
        booked = false;
        bookieName = "";
        bookieNumber = "";
        bookingTime = "17:30";
    };
    16 =     {
        booked = false;
        bookieName = "";
        bookieNumber = "";
        bookingTime = "18:00";
    };
    2 =     {
        booked = false;
        bookieName = "";
        bookieNumber = "";
        bookingTime = "11:00";
    };
}

It is the first time i am decoding so if you have an answer please try to explain a bit to why i need to make the change that i need.

UPDATE

After changing the code to what @sh_khan and @vadian suggested it worked to parse it however i am still getting this error inside my parsed object:

["1": MagicS.(unknown context at 0x106932738).bookings(bookieName: "", bookieNumber: "", booked: "false", bookingTime: "10:30"), 
"0": MagicS.(unknown context at 0x106932738).bookings(bookieName: "", bookieNumber: "", booked: "false", bookingTime: "10:00"),

Also, if i want to be able to access a single value lets say the first item with the key "0" -> bookieName, how would i do that using loginDetails

You aren't managing the first level with is the "11" key (for instance, or all the other ones in fact). What you can decode with your current code is something like that: {"booked":false,"bookieName":"","bookieNumber":"","bookingTime":"10:00"}. — Larme
– Larme, Commented Nov 19, 2018 at 15:03

Shehata Gamal · Accepted Answer · 2018-11-19 15:08:53Z

3

Firs booked is a Bool and no need for private enum Codingkeys if you won't rename the keys

struct Booking: Codable {

   let bookieName : String
   let bookieNumber: String
   let booked: Bool
   let bookingTime: String

}

Second decode like this

let loginDetails = try decoder.decode([String:Booking].self, from: response.data!)

answered Nov 19, 2018 at 15:08

Shehata Gamal

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3 Comments

Shehata Gamal Over a year ago

The parse is successful context is where you write the class in

EmbeddedOS Over a year ago

I did not understand what you mean. Could you explain in another way? @sh_Khan

Shehata Gamal Over a year ago

your context is the projectName.className

vadian · Accepted Answer · 2018-11-19 15:03:23Z

0

The root object is a dictionary with String keys and Bookings values – please name structs with a starting capital letter.

So you have to decode

let loginDetails = try decoder.decode([String:Bookings].self, from: response.data!)

answered Nov 19, 2018 at 15:03

vadian

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2 Comments

vadian Over a year ago

The unknown context is not related to the question about keyNotFound(CodingKeys. And what is MagicS? To get the value for a specific key just write loginDetails["0"]!.bookieName

EmbeddedOS Over a year ago

MagicS is the name of my swift project.Thank you for answering the other question @vadian

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