How to parse grouped nested dictionary in swift - ios

Question

Please help me out for parsing the below json response in SWIFT5 as I am getting nil values for the user and group data.
{
"user": {
"0": {
"id": "5",
"name": "ABC"
}
},
"group": {
"0": {
"id": "510",
"name": "XYZ"
}
}
}
if let unwrappedData = data {
do{
let json = try JSONSerialization.jsonObject(with: unwrappedData, options: [])
print(json)
if let user = try? JSONDecoder().decode(UserModel.self,from:unwrappedData){
completion(.success(user))
}else{
let errorResponse = try JSONDecoder().decode(ErrorResponse.self, from: unwrappedData)
completion(.failure(errorResponse.errorValue))
}
}catch{
completion(.failure(error))
}
}
The user data is printing as nil. please help me out to resolve the issue.

Answer 1

I tried below code in playground and it works like charm, what is the issue in json?
Data Model
// MARK: - Sample
struct Sample: Codable {
let user, group: Group
}
// MARK: - Group
struct Group: Codable {
let the0: The0
enum CodingKeys: String, CodingKey {
case the0 = "0"
}
}
// MARK: - The0
struct The0: Codable {
let id, name: String
}
Json Data
let jsonData = """
{
"user": {
"0": {
"id": "5",
"name": "ABC"
}
},
"group": {
"0": {
"id": "510",
"name": "XYZ"
}
}
}
""".data(using: .utf8)
Json Parsing
if let data = jsonData {
let object = try? JSONDecoder().decode(Sample.self, from: data)
print("Json Object", object)
}
else {
print("Bad Json")
}
Output
Json Object Optional(SwiftPlayground.Sample(user: SwiftPlayground.Group(the0: SwiftPlayground.The0(id: "5", name: "ABC")), group: SwiftPlayground.Group(the0: SwiftPlayground.The0(id: "510", name: "XYZ"))))