fetching Json swift 5 - json

Question

im trying to fetch some data from my api in swift 5
I get this error
Member 'success' in 'Result<[Suggestion], SuggestionError>' produces result of type 'Result', but context expects 'Result<[Suggestion],
and this is the function that gives me problems. if I comment the line giving me trouples it prints canNotProcessData
func getSuggestions (completion: #escaping(Result<[Suggestion], SuggestionError>) -> Void){
let dataTask = URLSession.shared.dataTask(with: resourceURL) { data, response, error in
guard let jsonData = data else{
completion(.failure(.noDataAvailable))
return
}
print(response!)
do{
let decoder = JSONDecoder()
let suggestionReponse = try decoder.decode(Suggestion.self, from: jsonData)
let suggestions = suggestionReponse
completion(.success(Suggestion))
}catch{
completion(.failure(.canNotProcessData))
}
}
dataTask.resume()
}
and this is my Suggestion struct
struct Suggestion:Decodable{
var id: Int
var hometeam: String
var awayteam: String
var hometeamLogo: String
var awayteamLogo: String
var bet: String
var value: Double
var stake: Int
var bookieOdds: Double
}
and this is an example of what I receive from my api
[
{
"id": 132,
"hometeam": "Afjet Afyonspor",
"awayteam": "Sancaktepe Belediyespor",
"hometeamLogo": "https://media.api-football.com/teams/3565.png",
"awayteamLogo": "https://media.api-football.com/teams/3604.png",
"bet": "2",
"value": 1.19,
"stake": 1,
"bookieOdds": 2.55
},
{
"id": 152,
"hometeam": "Bolívar",
"awayteam": "Blooming",
"hometeamLogo": "https://media.api-football.com/teams/3702.png",
"awayteamLogo": "https://media.api-football.com/teams/3701.png",
"bet": "2",
"value": 3.18,
"stake": 1,
"bookieOdds": 11
}
]

Answer 1

You should better show the whole message precisely:
Member 'success' in 'Result<[Suggestion], SuggestionError>' produces
result of type 'Result<Success, Failure>', but context expects
'Result<[Suggestion], SuggestionError>'
And it is obviously wrong as you are passing a type name here:
completion(.success(Suggestion))
But before the line, you have one thing wrong:
let suggestionReponse = try decoder.decode(Suggestion.self, from: jsonData)
The outermost structure of your JSON response is an array ([ ... ]) and you need to decode it as an Array of Suggestions, not a Suggestion:
Please try something like this:
func getSuggestions(completion: #escaping(Result<[Suggestion], SuggestionError>) -> Void){
let dataTask = URLSession.shared.dataTask(with: resourceURL) { data, response, error in
guard let jsonData = data else{
completion(.failure(.noDataAvailable))
return
}
print(response!)
do{
let decoder = JSONDecoder()
//### Use `[Suggestion].self`, not `Suggestion.self`
let suggestions = try decoder.decode([Suggestion].self, from: jsonData)
completion(.success(suggestions)) //###Use the response, not the type name
} catch {
print(error) //### This gives you some hints on how to solve the error cases
completion(.failure(.canNotProcessData))
}
}
dataTask.resume()
}