Swift: Using Codable with Nested JSON Arrays and Custom Types
I'm not sure how to approach I'm upgrading from an older version and I've searched everywhere and can't find a clear answer... I'm relatively new to this, so bear with me... I'm having trouble decoding a nested JSON structure into my Swift models using `Codable`. The JSON looks like this: ```json { "user": { "id": 1, "name": "John Doe", "posts": [ { "title": "First Post", "content": "This is my first post", "comments": [ { "userId": 1, "text": "Great post!" }, { "userId": 2, "text": "Thanks for sharing!" } ] }, { "title": "Second Post", "content": "Another interesting post", "comments": [] } ] } } ``` I have defined my model like this: ```swift struct User: Codable { let id: Int let name: String let posts: [Post] } struct Post: Codable { let title: String let content: String let comments: [Comment] } struct Comment: Codable { let userId: Int let text: String } ``` When I try to decode this JSON using the following code: ```swift let jsonData = /* your JSON data here */ let decoder = JSONDecoder() do { let user = try decoder.decode(User.self, from: jsonData) print(user) } catch { print("Decoding behavior: \(behavior)") } ``` I get the behavior: `Decoding behavior: The data couldn’t be read because it isn’t in the correct format.` I've checked the JSON and it seems valid. I've also ensured that my model's properties match the JSON keys correctly, including their types. Could there be an scenario with how I’m handling nested arrays, or is there something I'm missing regarding the decoding process? I've tried printing out the raw JSON data before decoding to confirm its structure, and it looks as expected. Any insights would be appreciated! For context: I'm using Swift on macOS. What am I doing wrong? This is part of a larger desktop app I'm building. Is there a better approach? I'm working on a service that needs to handle this. Any suggestions would be helpful. This issue appeared after updating to Swift stable. What are your experiences with this? I recently upgraded to Swift 3.10. What would be the recommended way to handle this?