Swift json decode with dynamic keys - json

Question

i'm trying to decode a nested json with dynamic keys, but can't find a solution.
here's my json:
{
"available_channels": {
"1000": {
"creation_date": "1111222",
"category_id": "9"
},
"1001": {
"creation_date": "222333",
"category_id": "10"
}
}
as you can see, "1000" and "1001" are dynamique.
The models i'm using:
struct StreamsData: Codable{
let availableChannels: AvailableChannels
}
struct AvailableChannels: Codable{
let channels: [String: Channel]
}
struct Channel: Codable{
let creationDate: String
let categoryId: String
}
'StreamsData' is the root object
'AvailableChannels' is the objects containing all channels objects
'Channel' channel model
decoding the json:
let decoder = JSONDecoder()
decoder.keyDecodingStrategy = .convertFromSnakeCase
let streams = try decoder.decode(StreamsData.self, from: data)
With this code i have this error:
CodingKeys(stringValue: "availableChannels", intValue: nil)
- debugDescription : "No value associated with key CodingKeys(stringValue: \"channels\", intValue: nil) (\"channels\")."
The problem is clear, as 'AvailableChannels' is declared to have a 'channel' property, the decoder is trying to find "channels" as key for the object containing the "creation_date".
Could you help me to solve this problem, thanks.

Answer 1

You only need
struct StreamsData: Codable{
let availableChannels: [String: Channel]
}
struct Channel: Codable{
let creationDate,categoryId: String
}
do {
let dec = JSONDecoder()
dec.keyDecodingStrategy = .convertFromSnakeCase
let res = try dec.decode(StreamsData.self, from: data)
}
catch {
print(error)
}