Manipulate and resend a JSON response

[lifeisfoo]

I'm using siesta with SwiftyJSON, and I've a login call that returns some json data that I need to resend after a proper manipulation:

//api.login is a Resource
api.login.request(.POST, json: [:])
            .success() { response in
                var res = response.json
                //example manipulation
                res["cbs"][0]["input"][0]["value"].string = "00000"
                api.login.request(.POST, json: res).success(){/*...*/}
            }

But this code generate a static error:

Argument type 'JSON' does not conform to expected type 'NSJSONConvertible'

Howto manipulate response data between two (ore more) request?

[pcantrell]

I assume that response.json is the typed content accessor from the example project that returns SwiftyJSON, right?

What's going on here is that at this point:

var res = response.json
//example manipulation
res["cbs"][0]["input"][0]["value"].string = "00000"

…res is a SwiftyJSON.JSON object, but NSJSONConvertible wants a dictionary or array. You have two options:

1. Convert the JSON back to an NSDictionary to pass it to Siesta:

   api.login.request(.POST, json: res.dictionary)
   

2. If you're doing that in many places, add a Siesta request flavor that accepts JSON objects:

   public func request(method: RequestMethod, jsonDict: JSON) -> Request
       { return request(method, json: json.dictionary) }
   

(Warning: untested code there!)

[lifeisfoo]

Yes, res is a SwiftyJSON.JSON.

I've already tried with .dictionary but seems that it generates a non valid type for the method signature:

Argument type '[String : JSON]?' does not conform to expected type 'NSJSONConvertible'

[pcantrell]

Ah, indeed. Here is some code that I’ve verified actually compiles:

extension Resource
    {
    public func request(method: RequestMethod, jsonDict: JSON) -> Request
        { return request(method, json: json.object as! NSJSONConvertible) }
    }

See if that does the trick.

(Hmm. I should expose FailedRequest in the public API so you can replace that as! with an as?.)

[lifeisfoo]

Yes, this is right, but there is a typo in the call: the parameter is called jsonDict, not json :).

extension Resource
    {
    public func request(method: RequestMethod, jsonDict: JSON) -> Request
        { return request(method, json: jsonDict.object as! NSJSONConvertible) }
    }

Thank you for the help.

Do you think that could be useful to add this example in a "Cookbook" page inside Siesta docs?

[pcantrell]

the parameter is called jsonDict, not json

Ah, right.

I mean to write up a cookbook for 1.0, but am trying to get API details sorted out first.

I may also add a standard SwiftyJSON extension, now that there's an Extensions folder for such things.