JSON Serialization using afnetworking

Question

I have problem with the way i received the json in the server. have students array (of dictionary) wrapping it in dictionary:

var students:[[String: String]] = []
students.append(["id":"2", "name":"joe"]);
students.append(["id":"3", "name":"jake"]);
students.append(["id":"4", "name":"may"]);
students.append(["id":"1", "name":"donna"]);
let json:[String:[[String:String]]] = ["students" : students]

when printing the json using NSJSONSerialization

var data = NSJSONSerialization.dataWithJSONObject(json, options:  NSJSONWritingOptions.PrettyPrinted, error: &error)
println(NSString(data: data!, encoding: NSUTF8StringEncoding))

{
  "students" : [
    {
      "id" : "2",
      "name" : "joe"
    },
    {
      "id" : "3",
      "name" : "jake"
    },
    {
      "id" : "4",
      "name" : "may"
    },
    {
      "id" : "1",
      "name" : "donna"
    }
  ]
}

In nodeJS I get the json like this:

{ 'students[][id]': [ '2', '3', '4', '1'],
  'students[][name]': [ 'joe', 'jack', 'may', 'donna' ]
}

Edit: Afn code:

 AFHTTPRequestOperationManager().POST("http://10.0.0.1:8080/echo", parameters: json,
            success: { (operation: AFHTTPRequestOperation!, responseObject: AnyObject!) -> Void in
                println(operation.responseString)

            }, failure: { (operation: AFHTTPRequestOperation!, error: NSError!) -> Void in
        })

Answer 1

In your question, you are taking your dictionary structure, and manually creating JSON. But when you create the request via AFNetworking, you're not specifying a JSON request, but rather a Content-Type of application/x-www-form-urlencoded because the default requestSerializer is AFHTTPRequestSerializer.

If you want to create JSON request in AFNetworking, you would:

let manager = AFHTTPRequestOperationManager()

manager.requestSerializer = AFJSONRequestSerializer(writingOptions: nil)

manager.POST("http://10.0.0.1:8080/echo", parameters: json, success: { (operation: AFHTTPRequestOperation!, responseObject: AnyObject!) -> Void in
    println(operation.responseString)

}, failure: { (operation: AFHTTPRequestOperation!, error: NSError!) -> Void in
    println(error)
})