Json decode result is printing into console in swift playground - json

Question

I am new to swift . I created simple playground and added the file with extension json into playground . I am trying to decode the result and print the ID into console but any reason ,it not printing the result into console , I do not see error into console window ..
Here is the playground project structure ..
Here is my json file ..
let json = """
{
"id": "1",
"options": [
{
"id": "11",
"options": [
{
"id": "111",
"options": []
}
]
},
{
"id": "2",
"options": [
{
"id": "21",
"options": []
},
{
"id": "22",
"options": [
{
"id": "221",
"options": []
}
]
}
]
}
]
}
Here is the code .. I tried ..
struct People: Codable {
let id: String
let options: [People]
}
func loadJson(filename fileName: String) -> People? {
if let url = Bundle.main.url(forResource: fileName, withExtension: "json") {
do {
let data = try Data(contentsOf: url)
let decoder = JSONDecoder()
let jsonData = try decoder.decode(People.self, from: data)
print(jsonData.id)
return jsonData
} catch {
print("error:\(error)")
}
}
return nil
}
It not printing the ID of the decode json ..

Answer 1

So I did get it to print the ID, I changed the people file name to people.json and changed the contents to:
{
"id": "1",
"options": [{
"id": "11",
"options": [{
"id": "111",
"options": []
}]
},
{
"id": "2",
"options": [{
"id": "21",
"options": []
},
{
"id": "22",
"options": [{
"id": "221",
"options": []
}]
}
]
}
]
}
(Notice I removed the let json = statement.)
After that in the playground where define the People struct and the loadJson method you can call it like so:
loadJson(filename: "people")
So now you end up with:
struct People: Codable {
let id: String
let options: [People]
}
func loadJson(filename fileName: String) -> People? {
if let url = Bundle.main.url(forResource: fileName, withExtension: "json") {
do {
let data = try Data(contentsOf: url)
let decoder = JSONDecoder()
let jsonData = try decoder.decode(People.self, from: data)
print(jsonData.id)
return jsonData
} catch {
print("error:\(error)")
}
}
return nil
}
loadJson(filename: "people")