How to create the model class for the following JSON data and parse it?

Question

My JSON data

{
 "addon_items" : [
                     {
                      "aname" : "",
                      "id" : "2588",
                      "name" : "Plain Nan",
                      "order" : "1",
                      "aid" : "259",
                      "Sub_Add_Items" : "",
                      "icon" : "",
                      "status" : "1",
                      "next" : "0",
                      "price" : "0.60"
                     },
                     {
                      "aname" : "",
                      "id" : "2589",
                      "name" : "Pitta Bread",
                      "order" : "2",
                      "aid" : "259",
                      "Sub_Add_Items" : "",
                      "icon" : "",
                      "status" : "1",
                      "next" : "0",
                      "price" : "0.00"
                    }

                   ],

 "addon" : {
             "description" : "Please choose your Nan bread",
             "aname" : "",
             "id" : "259",
             "icon" : "",
             "limit" : "1",
             "special_addon" : "",
             "next" : "165"
           }
 }

I created three class models named AddOnResponse, AddOn, AddOnItems like this:

AddOnResponse class model

class AddOnResponse {

var addon: Array<String>?
var addonitems: Array<AnyObject>?

init(addon:Array<String>?,addonitems: Array<AnyObject>?){
    self.addon = addon
    self.addonitems = addonitems
 }
}

AddOn class model

class AddOn {


var id: Int?
var icon: String?
var desc: String?
var limit: Int?
var next: Int?
var aname: String?
var specialaddon: Int?

init(id: Int?,icon: String?,desc: String?,limit: Int?,next: Int?,aname: String?,specialaddon: Int?){

    self.id = id
    self.icon = icon
    self.desc = desc
    self.limit = limit
    self.next = next
    self.aname = aname
    self.specialaddon = specialaddon

  }
 }

AddOnItems class model

class AddOnItems {


var id: Int?
var aid: Int?
var name: String?
var price: Int?
var order: Int?
var status: Int?
var next: Int?
var aname: String?
var subaddItems: Int?
var icon: String?

init(id: Int?,aid: Int?,name: String?,price: Int?,order: Int?,status: Int?,next: Int?,aname: String?,subaddItems: Int?,icon: String?){
    self.id = id
    self.aid = aid
    self.name = name
    self.price = price
    self.order = order
    self.status = status
    self.next = next
    self.aname = aname
    self.subaddItems = subaddItems
    self.icon = icon
   }
 }

Now I am fetching my JSON data using Alamofire but when accepting dat into class model using object I am getting nil value.

    var addonResponses = [AddOnResponse]()

    Alamofire.request(.GET, myAddOnUrl)
        .validate()
        .responseJSON
        {   response in
            switch response.result
            {
            case .Success:
                if let value = response.result.value{
                    let json = JSON(value)
                    print(json)
                    print(json["addon"].arrayValue)


           for(_,content) in json{
               let addOnRes = AddOnResponse(addon:content["addon"].arrayValue,
                               addonitems:content["addon_items"].Arrayobject)

                        print(self.addonResponses.count)
                        print(addOnRes.addon)
                        print(addOnRes.addonitems)
                    }
                }

The addon and addonitems data are coming nil, why?

Solution 1

After going through your JSON response, what I see is that you are getting an object which has two nodes(or properties). First- "addon_items" which has as array and for which you have created a class AddOnItems which is correct. Second- "addon": this key over here is reference to a 'Dictionary' rather than to an array.

So to store the response in your AddOnResponse object, try the following code.

Alamofire.request(.GET, myAddOnUrl).validate().reponseJSON { response in
    switch resonse.result {
    case .Success:
       if let value = response.result.value {
           let json = JSON(value)
           let responseDictionary = json.dictionaryValue as? [String: AnyObject]
           let addOnRes = AddOnResponse(addon:responseDictionary["addon"].dictionaryValue, addonitems:responseDictionary["addon_items"].arrayValue)
       }
    case .Failure:
       break
    } 
}

Also make change to your AddOnResponse class

class AddOnResponse {
    var addon: [String: AnyObject]?
    var addonitems: Array<AnyObject>?

    init(addon:[String: AnyObject]?,addonitems: Array<AnyObject>?){
        self.addon = addon
        self.addonitems = addonitems
    }
}

TL;DR Your JSON response doesn't properly correspond to the model you've made in your app. Double check the "addon" key of your json response which has a dictionary object to it and NOT AN ARRAY and accordingly make your model classes.

Edit: Rectifying the mistake to point the casting error. What I would now suggest is that pass the JSON object for `add_on' key. In the AddOn class change the initialiser so that it takes a JSON object. Then initialising them using. AddOn Class Initialiser

init(json: JSON) {
    id = json["id"].intValue
    name = json["name"].stringValue
    // and so on
}

Similarly do the same for AddOnItems. And in the AddOnResponse initialiser iterate in a loop the JSON object for AddOnItems. Initialise it and append to the addOnItems array property. Sorry cannot write the code for it right now. Got a time constraint.

Solution 2

import Foundation
import SwiftyJSON

class UserInfo {

    var mobile : Int?
    var userid : Int?
    var email : String?
    var name : String?

    init() {

    }

    init(json : JSON){
        mobile = json["phone_number"].intValue
        userid = json["id"].intValue
        email = json["email"].stringValue
        name = json["name"].stringValue
    }

}

Solution 3

Try this. I have done this using AlamofireObjectMapper. Check AlamofireObjectMapper for more info

import UIKit
import ObjectMapper


class FollowList: Mappable {

    var addonItems : [addonItemsList]?
    required init?(_ map: Map) {
        super.init(map)
    }
    override func mapping(map: Map) {
        super.mapping(map)

        addonItems <- map["addon_items"]
    }
    }
     class addonItemsList : Mappable{
    var aname : String?
    var id : String?
    var name : String?
    var order : Int?
    var aname : Int?

    required init?(_ map: Map) {

    }
    func mapping(map: Map) {

        aname <- map["aname"]
        id <- map["id"]
        order <- map["order"]
        name <- map["name"]
        icon <- map["icon"]

    }

}

       let URL = "https://raw.githubusercontent.com/tristanhimmelman/AlamofireObjectMapper/2ee8f34d21e8febfdefb2b3a403f18a43818d70a/sample_keypath_json"


          Alamofire.request(.GET, URL)..responseArray { (response: Response<[FollowList], NSError>) in { (response: Response< FollowList, NSError>) in
    expectation.fulfill()

    let FollowList = response.result.value
    print(FollowList?. addonItems)

}

Solution 4

After so many experiments I got the answer. I have to pass the data to objects like this way. i followed @nishantdesai answers and do some modifications..

 Alamofire.request(.GET, myAddOnUrl)
        .validate()
        .responseJSON
        {   response in
            switch response.result
            {
            case .Success:
                if let value = response.result.value{
                    let json = JSON(value)

                    let addOnRes = AddOnResponse(addon: json["addon"].object as? [String : AnyObject],
                                                addonitems: json["addon_items"].arrayObject)
                    print(addOnRes.addon)
                    print(addOnRes.addonitems)



                }

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