Response Serialization error, how to fix it? - json

Question

I am trying to decode a json data, but it throws an error:
[] nw_protocol_get_quic_image_block_invoke dlopen libquic failed responseSerializationFailed(reason: Alamofire.AFError.ResponseSerializationFailureReason.decodingFailed(error: Swift.DecodingError.typeMismatch(Swift.Dictionary<Swift.String, Any>, Swift.DecodingError.Context(codingPath: [], debugDescription: "Expected to decode Dictionary<String, Any> but found an array instead.", underlyingError: nil))))
I think, I did it in a correct way, I checked for the type mismatch also, looks correct, but could not comprehend why am i still getting the error. .
here is how my json data response looks like:
[
{
"id": 1,
"name": "BlackJet",
"type": "Silk",
"quantity": "100"
},
[
{
"id": 2,
"name": "Toto",
"type": "Leather",
"quantity": "10"
},
...,
]
here is my struct data:
import Foundation
struct Response<T: Codable>: Codable {
var data: [T]?
}
struct MyData: Codable {
var id: Int
var name: String
var type: String
var quantity: Int
}
and my serverCommunicator func:
static func getData() -> Promise<Response<MyData>> {
let decoder = JSONDecoder()
return Promise { seal in
AF.request(API.getData, method: .get, parameters: .none).responseDecodable(of: Response<MyData>.self, decoder: decoder) { response in
switch response.result {
case .success(let val):
return seal.fulfill(val)
case .failure(let err):
return seal.reject(err)
}
}
}
}
and my apiCall func inside VC didload:
func getData() {
ServerCommunicator.getData().done { response -> Void in
guard response.data != nil, let data = response.data else {
print("Data could not be obtained.. .")
return
}
self.data = data
}.catch { (err) in
print(err)
}
}
NOTE: No api headers or parametrs exist in my api//

Answer 1

First you need to change the type of quantity from Int to String as per the response,
struct MyData: Codable {
var id: Int
var name: String
var type: String
var quantity: String
}
Then you will need to change the signature of getData method as below,
static func getData() -> Promise<[MyData]> {
let decoder = JSONDecoder()
return Promise { seal in
AF.request(API.getData, method: .get, parameters: .none).responseDecodable(of: [MyData].self, decoder: decoder) { response in
switch response.result {
case .success(let val):
return seal.fulfill(val)
case .failure(let err):
return seal.reject(err)
}
}
}
}