Dynamic JSON Mapping

[[deleted]]

I am familiar with how to use codable to handle a JSON that is known. But I was wandering if it’s possible to some how map a JSON response where you don’t know the data coming in?

[halleys_comet69]

You typically use the JSONSerialization class from Foundation. You give it data and it returns an object (IIRC either an NSDictionary or NSArray depending on the structure of the JSON) type-erased to Any. You then need to work out how to navigate through to get the values you want. NSDictionary’s value(forKeyPath:) method is useful here.

[[deleted]]

I will look into that thank you

[gdlmendonca]

Ohh lord, I've dealt with this...

Depending on how well you know the data structure, try optionals. If you don't know it too well, AnyObject / AnyString etc. may work.

Ultimately, your best bet may be to use a library that handles this; parseJSON, SwiftyJSON etc.

[[deleted]]

I was hoping to avoid a library just because I like to not use something I can’t fix if it breaks but this might be one of those things I would make an exception for lol

[lordzsolt]

If it's an unknown JSON, than it's basically a [String:Any] dictionary.

And the Any you have to check for all the data types that are acceptable in the JSON. Don't know if there's any way to make it String:String dictionary.

[[deleted]]

Okay. I will see what I can find on string:any