Fail to decode JSON with swift Combine - json

Question

I'm trying to read this JSON data with Combine but I cannot make it work if I try to read the release field.
The address https://amiiboapi.com/api/ returns something like this:
{
"amiibo": [
{
"amiiboSeries": "Super Smash Bros.",
"character": "Mario",
"gameSeries": "Super Mario",
"head": "00000000",
"image": "https://raw.githubusercontent.com/N3evin/AmiiboAPI/master/images/icon_00000000-00000002.png",
"name": "Mario",
"release": {
"au": "2014-11-29",
"eu": "2014-11-28",
"jp": "2014-12-06",
"na": "2014-11-21"
},
"tail": "00000002",
"type": "Figure"
},
{
"amiiboSeries": "Super Mario Bros.",
"character": "Mario",
"gameSeries": "Super Mario",
"head": "00000000",
"image": "https://raw.githubusercontent.com/N3evin/AmiiboAPI/master/images/icon_00000000-00340102.png",
"name": "Mario",
"release": {
"au": "2015-03-21",
"eu": "2015-03-20",
"jp": "2015-03-12",
"na": "2015-03-20"
},
"tail": "00340102",
"type": "Figure"
}
]
}
I have my model like this:
// MARK: - Amiibo List
struct AmiibosList: Codable {
let amiibo: [Amiibo]
}
// MARK: - Amiibo
struct Amiibo: Codable {
let amiiboSeries: String
let character: String
let gameSeries: String
let head: String
let image: String
let name: String
let release: Release
let tail: String
let type: String
}
// MARK: - Release
struct Release: Codable {
let au : String?
let eu : String?
let jp : String?
let na : String?
}
And I'm trying to fetch the data like this:
guard let url = URL(string: "https://amiiboapi.com/api/") else {
fatalError("Invalid URL")
}
var publisher = URLSession.shared.dataTaskPublisher(for: url)
.receive(on: RunLoop.main)
.map(\.data)
.decode(type: AmiiboList.self, decoder: JSONDecoder())
.sink(receiveCompletion: { completion in
if case .failure(let err) = completion {
print("Failed with error \(err)")
}
}, receiveValue: { value in
print("Received \(value)")
// print(" Received \(value.amiibo[0].release)")
})
If I comment/remove the release from my amiibo struct, everything works. For some reason I cannot retrieve the data with the release dates and I can't figure why.
Do I need to do anything else for nested JSON data?

Answer 1

With the below, you can simply do: response.amiibo[0].release to get the release object. Note that the release object contains Date objects rather than Strings. That should be helpful.
func example(data: Data) throws -> Response {
let data = jsonString.data(using: .utf8)!
let dateFormatter = DateFormatter()
dateFormatter.dateFormat = "yyyy-MM-dd"
let decoder = JSONDecoder()
decoder.dateDecodingStrategy = .formatted(dateFormatter)
return try decoder.decode(Response.self, from: data)
}
struct Response: Codable {
let amiibo: [Amiibo]
}
struct Amiibo: Codable {
let amiiboSeries: String
let character: String
let gameSeries: String
let head: String
let image: URL?
let name: String
let release: Release
let tail: String
let type: String
}
struct Release: Codable {
let au: Date?
let eu: Date?
let jp: Date?
let na: Date?
}