Issue while sending array of dictionary in swift - ios

Question

I am creating array of dictionaries and then passing that in paramDictionary and sending to server but I get responseStatus code 422. I am using Alamofire 5.
Here is the structure of param which I have to send and it successfully working on postman but in app it is always fails
{"check_in": [{"check_in_at":"2020-02-26 03:23:44", "gps_coordinates":"3.1697998046875,101.61672197976593"},
{"check_in_at":"2020-02-26 03:23:45","gps_coordinates":"3.1697998046875,101.61672197976593"}]}
Here is my code
func postCheckInApi(viewController: UIViewController,
completion:#escaping (_ result:SuccessErrorData)->(),
errorHandler:#escaping (_ result:Error,_ statusCode:Int?)->()//error handler
) {
let url = KCheckin
let geoArr = Constant.getSearchLocationHistory() ?? [GeoTaggingEntity]()
var arr = [[String: String]]()
for i in geoArr{
let dict: [String : String] = ["gps_coordinates" : i.gps_coordinates ?? "", "check_in_at" : i.check_in_at]
arr.append(dict)
}
let parameterDictionary = ["check_in": arr] as [String : Any]
print(parameterDictionary)
let headers: HTTPHeaders = [
"Accept": "application/json",
"Content-Type": "application/json",
"Authorization": Constant.getBearerToken() ?? ""
]
AF.request(url, method: .post, parameters: parameterDictionary, headers: headers).responseData { response in
switch response.result{
case.success(let data):
do{
let jsonData = try JSONDecoder().decode(SuccessErrorData.self, from: data)
print("Success")
completion(jsonData)
}
catch{
//viewController.navigationController?.popToRootViewController(animated: true)
}
case .failure(let error):
print(error)
}
}
}

Answer 1

You can not add Array as parameter object to your paramDictionary. You need to covert your Array to json string and then add it to you paramDictionary.
For that use below Collection extension to convert your Array to Json String
extension Collection {
func json() -> String? {
guard let data = try? JSONSerialization.data(withJSONObject: self, options: []) else {
return nil
}
return String(data: data, encoding: String.Encoding.utf8)
}
}
How To Use
let jsonStr = yourArray.json()
add this jsonStr to your paramDictionary