Swift Codable Json Response - ios

Question

I Have the following JSON response from API,
{
"status_code": 1000,
"data": [
{
"id": 3,
"invoice_id": 100000,
"user_id": 1000,
"contact_number": "NA",
"province": 0,
"location": "100000",
"total": 0,
"confirm_code": 1234,
"status": 0,
"created_at": "2020-03-18 22:07:25",
"updated_at": "2020-03-18 22:07:25"
},
{
"id": 4,
"invoice_id": 100000,
"user_id": 1000,
"contact_number": "NA",
"province": 0,
"location": "100000",
"total": 0,
"confirm_code": 1234,
"status": 0,
"created_at": "2020-03-18 22:10:40",
"updated_at": "2020-03-18 22:10:40"
},
{
"id": 5,
"invoice_id": 100000,
"user_id": 1000,
"contact_number": "NA",
"province": 0,
"location": "100000",
"total": 0,
"confirm_code": 1234,
"status": 0,
"created_at": "2020-03-18 22:12:29",
"updated_at": "2020-03-18 22:12:29"
}
],
"message": null
}
and my struct is,
struct Invoice: Codable {
let statusCode: Int
let data: [Datum]
let message: String?
enum CodingKeys: String, CodingKey {
case statusCode
case data, message
}
}
struct Datum: Codable {
let id, invoiceID, userID: Int
let contactNumber: String
let province: Int
let location: String
let total, confirmCode, status: Int
let createdAt, updatedAt: String
enum CodingKeys: String, CodingKey {
case id
case invoiceID
case userID
case contactNumber
case province, location, total
case confirmCode
case status
case createdAt
case updatedAt
}
}
and In View Controller,
override func viewDidLoad() {
super.viewDidLoad()
let url = URL(string: "http://xxxxx/api/invoices/\(1000)")!
var request = URLRequest(url: url)
request.httpMethod = "get"
let task = session.dataTask(with: request) { (data, response, error) in
guard let data = data else { return }
do {
let jsonData = try JSONDecoder().decode([Invoice].self, from: data)
print(jsonData)
}
catch let jsonerr {
print("error serrializing error",jsonerr)
}
}
task.resume()
}
But Im keeping below error message,
error serrializing error typeMismatch(Swift.Array, Swift.DecodingError.Context(codingPath: [], debugDescription: "Expected to decode Array but found a dictionary instead.", underlyingError: nil))
Please what Im missing here ! Any help will be much appreciated

Answer 1

The Codable struct will be like
struct Invoice: Codable {
let statusCode: Int
let data: [Datum]
let message: String?
enum CodingKeys: String, CodingKey {
case statusCode = "status_code"
case data, message
}
}
struct Datum: Codable {
let id, invoiceID, userID: Int
let contactNumber: String
let province: Int
let location: String
let total, confirmCode, status: Int
let createdAt, updatedAt: String
enum CodingKeys: String, CodingKey {
case id = "id"
case invoiceID = "invoice_id"
case userID = "user_id"
case contactNumber = "contact_number"
case province, location, total
case confirmCode = "confirm_code"
case status
case createdAt = "created_at"
case updatedAt = "updated_at"
}
}
And also use
let jsonData = try JSONDecoder().decode(Invoice.self, from: data)
instead of
let jsonData = try JSONDecoder().decode([Invoice].self, from: data)