Swift: Unable to parse JSON response to model - json

Question

I am getting data response from server like below:
{
"success": true,
"data": {
"cash": 0,
"newCash": 0,
"cashExpireAt": "2019-02-26T16:01:35.6451887+08:00",
"isEnabled": false,
"low_balance": true
}
}
//Below is Model Class
class WalletBalance: Mappable {
var isSuccess : Bool! = false
var data : WalletData?
required init?(map: Map) {
//Code here
}
func mapping(map: Map) {
isSuccess <- map["success"]
data <- map["data"]
}
}
class WalletData: Mappable {
var cash : Int! = 0
var newCash : Int! = 0
var cashExpireAt : String! = ""
var isEnabled : Bool! = false
var low_balance : Bool! = false
required init?(map: Map) {
//Code here
}
func mapping(map: Map) {
cash <- map["cash"]
newCash <- map["newCash"]
cashExpireAt <- map["cashExpireAt"]
isEnabled <- map["isEnabled"]
low_balance <- map["low_balance"]
}
}
//Below is code to call server api
Alamofire.request(url!, method: .get, parameters: nil, encoding: URLEncoding.default, headers: walletHeaders)
.validate(statusCode: 200..<600)
.responseObject { (response: DataResponse<WalletBalance>) in
switch response.result {
case .success:
if response.result.value == nil {
//Code here
} else {
completion(response.result.value!)
}
break
case .failure(let error):
print("error: ", error.localizedDescription)
break
}
}
I am getting error:
error: The operation couldn’t be completed. ObjectMapper failed to
serialize response.
I tried to call api using postman but its working fine in Postman.

Answer 1

Have you tried using Decodable instead of Mappable as suggested by the Alamofire documentation?

Answer 2

Use Decodable. It's much easier, more efficient, built-in and it generates much less code. The date can be decoded directly as Date
let jsonString = """
{
"success": true,
"data": {
"cash": 0,
"newCash": 0,
"cashExpireAt": "2019-02-26T16:01:35.6451887+08:00",
"isEnabled": false,
"low_balance": true
}
}
"""
struct Balance : Decodable {
let success : Bool
let data : Wallet
}
struct Wallet: Decodable {
let cash, newCash : Int
let cashExpireAt : Date
let isEnabled, lowBalance : Bool
}
let data = Data(jsonString.utf8)
let decoder = JSONDecoder()
let dateFormatter = DateFormatter()
dateFormatter.locale = Locale(identifier: "en_US_POSIX")
dateFormatter.dateFormat = "yyyy-MM-dd'T'HH:mm:ss.SSSZ"
decoder.dateDecodingStrategy = .formatted(dateFormatter)
decoder.keyDecodingStrategy = .convertFromSnakeCase
do {
let result = try decoder.decode(Balance.self, from: data)
print(result)
} catch { print(error) }