JSON Decoding Not Populating Table View - ios

Question

I am trying to parse data from the website movieDatabase.com However there's some issue decoding the data to json and populating my table view.I am not sure why this is happening. Please I need help spotting out the problem. Here's my code. https://github.com/lexypaul13/Movie-Browser/tree/main/Movie-Browser
struct Movies: Codable {
let overview:String?
let original_title: String?
let poster_path:String
}
struct ApiResponse:Codable, Hashable {
let page:Int
let shows:[Movies]
enum CodingKeys:String, CodingKey {
case page = "page"
case shows = "results"
}
}
class NetworkManger{
enum EndPoint{
case showList
}
static let shared = NetworkManger()
private let baseURL : String
private var apiKeyPathCompononent :String
private init(){
self.baseURL = "https://api.themoviedb.org/3/movie/now_playing?"
self.apiKeyPathCompononent = "api_key=a07e22bc18f5cb106bfe4cc1f83ad8ed"
}
private var jsonDecoder:JSONDecoder = {
let decoder = JSONDecoder()
decoder.keyDecodingStrategy = .convertFromSnakeCase
return decoder
}()
func get<T:Decodable>(_ endPoints: EndPoint, urlString: String, completed:#escaping(Result<T?,ErroMessage>)->Void){
guard let url = urlBuilder(endPoint: endPoints) else {
completed(.failure(.invalidURL))
return
}
let task = URLSession.shared.dataTask(with: url){ data, response, error in
if let _ = error {
completed(.failure(.unableToComplete))
return
}
guard let response = response as? HTTPURLResponse, response.statusCode==200 else {
print(ErroMessage.invalidResponse.rawValue)
completed(.failure(.invalidResponse))
return
}
guard let data = data else{
completed(.failure(.invalidData))
return
}
do{
let apiResponse = try self.jsonDecoder.decode([T].self, from: data)
DispatchQueue.main.async {
completed(.success(apiResponse as? T))
}
} catch{
print(ErroMessage.invalidData.rawValue)
}
}
task.resume()
}
private func urlBuilder(endPoint:EndPoint )->URL?{
switch endPoint {
case .showList:
return URL(string: baseURL + apiKeyPathCompononent )
}
}
func getMovies(){
NetworkManger.shared.get(.showList, urlString: "") { [weak self] (result: Result<[Movies]?,ErroMessage> ) in
guard let self = self else { return }
switch result{
case .success(let movies):
self.movies = movies ?? []
DispatchQueue.main.async {self.tableView.reloadData()}
case .failure(let error):
print(error.localizedDescription)
}
}
}
}

Answer 1

The root object returned from the api is your ApiResult struct. This contains an array of movies (which you have mapped to the shows property of the ApiResult)
You need to change the getMovies function so that the right generic type can be inferred and the json decoder can do the right thing
func getMovies(){
NetworkManger.shared.get(.showList, urlString: "") { [weak self] (result: Result<ApiResult,ErroMessage> ) in
guard let self = self else { return }
switch result{
case .success(let apiResult):
self.movies = apiResult.shows
DispatchQueue.main.async {self.tableView.reloadData()}
case .failure(let error):
print(error.localizedDescription)
}
}
}