Cannot update data in API using .PUT request in Alamofire

Question

I am creating an Event app where in the user should tap Check In Button to register for the event. registered_flag : false will be true and registered_type: 0 will be 1 once the user tapped the button. But as I build and run the app, error appeared that says

responseSerializationFailed(Alamofire.AFError.ResponseSerializationFailureReason.jsonSerializationFailed(Error Domain=NSCocoaErrorDomain Code=3840 "Invalid value around character 0." UserInfo={NSDebugDescription=Invalid value around character 0.})).

I am not really confident regarding the content of my codes in my APIService. Hope someone will help me to correct my codes so I could build and run my app successfully. Thank you so much.

application/json that needs to be updated which inside event_participant

{
   "registered_flag": false,
    "registration_type": 0
}

event_participant

"event_participants": [
    {
        "participant_id": "70984656-92bc-4c36-9314-2c741f068523",
        "employee_number": null,
        "last_name": "Surname",
        "first_name": "FirstName",
        "middle_name": null,
        "display_name": "Surname, FirstName ",
        "department_name": "Department",
        "position_name": "Developer",
        "registered_flag": false,
        "registered_datetime": "2018-09-13T08:54:40.150",
        "registration_type": 0,
        "delete_flag": false,
        "manual_reg_flag": false,
        "out_flag": false,
        "out_datetime": null,
        "classification": 6,
        "others": "Guest"
      }
    }

API Service using PUT request in Alamofire

func updateParticipant(updateType: UpdateParticipantType,
                       participantID: String,
                       completionHandler: @escaping(([Attendee]?, Error?) -> Void)) {

    let updateParticipantURL = URL(string: "\(REGISTER_PARTICIPANT_URL)/\(updateType)/\(participantID)")

    let headers: HTTPHeaders = [
        "Content-Type": "application/json"
    ]

    let parameters: Parameters = [
        "registered_flag": false,
        "registration_type": 0
    ]

    Alamofire.request(updateParticipantURL!, method: .put, parameters: parameters, encoding: JSONEncoding.default, headers: headers).responseJSON { (response) in

        switch response.result {
        case .success:
            print("Done")

            if let jsonArray = response.result.value as? [[String : Any]] {
                for anItem in jsonArray {
                    if let eventparticipant = anItem["event_participants"] as? [[String : Any]] {
                        var extractedAttendee = [Attendee]()
                        for participant in eventparticipant{
                            print(participant)
                            let success = Attendee.init(JSON: participant)
                            extractedAttendee.append(success!)
                        }
                        completionHandler(extractedAttendee, nil)
                    }
                }
            }

        case .failure(let error):
            completionHandler(nil, error)
        }
    }
}

Struct for Attendee

struct Attendee: Decodable {

let id: String
let employeeNumber: String?
let lastName: String
let firstName: String
let middleName: String
let displayName: String
let department: String
let position: String
let registeredFlag: Bool
let registeredDateTime: Date?
let registrationType: Int
let deleteFlag: Bool
let manualFlag: Bool
let outFlag: Bool
let outDateTime: Date?
let classification: Int?
let others: String?

postman response

try to make call using `encoding: URLEncoding = URLEncoding.httpBody`. Hope this will help you. — bestiosdeveloper, Sep 14 '18 at 07:00
What is the type of value that your API service accepts? for `registered_flag` and `registration_type`. Is it boolean or number as mentioned? Can you check once and confirm — Saheb Roy, Sep 14 '18 at 07:07
@SahebRoy is right, once check that. And please try making a call on postman first, is it working on postman or not? — bestiosdeveloper, Sep 14 '18 at 07:11
@SahebRoy `registered_flag : Bool` and `registration_type: Int`. I edited my question and I added the `Attendee` struct — Titus, Sep 14 '18 at 07:12
What is the response of u try to use a rest client with the exact same response? — Saheb Roy, Sep 14 '18 at 07:18
@bestiosdeveloper I tried it using postman and it worked. I add an image of my postman above for you reference. — Titus, Sep 14 '18 at 07:18
I got `200 Ok` in postman but in network response in swift I got `failure` — Titus, Sep 14 '18 at 07:26
@Titus but it's not working at my end. Showing : "message": "The requested resource does not support http method 'GET'." — bestiosdeveloper, Sep 14 '18 at 07:31
There are other answers around this issue: https://stackoverflow.com/questions/32355850/alamofire-invalid-value-around-character-0 — ZeMoon, Sep 14 '18 at 07:32
@Titus When I'm trying to make call it's showing: https://i.stack.imgur.com/7T2Up.png And I think it's getting called. — bestiosdeveloper, Sep 14 '18 at 07:41
@bestiosdeveloper still no working for me. Still can't figure it out which part of my code is wrong — Titus, Sep 14 '18 at 08:01
Brain dead in this issue, Still can't resolve my issue, please help me. Thank you — Titus, Sep 18 '18 at 03:32

Cannot update data in API using .PUT request in Alamofire

0 Answers0