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iosjsonswiftalamofireobjectmapper

Create String Arrays from JSON Response Alamofire


I am trying to create some arrays from a JSON Response. I am using Alamofire Object Mapper. I'm not sure if I am mapping the object correctly.

Here is my JSON response

{
    "status": "success",
    "data": [
        {
            "id": 1,
            "name": "EXERCISE",
            "parent_id": null,
            "children": [
                {
                    "id": 2,
                    "name": "All Exercises",
                    "parent_id": 1,
                    "children": [],
                    "created_at": "2018-08-22 09:03:47",
                    "updated_at": "2018-08-22 09:03:47"
                },
                {
                    "id": 3,
                    "name": "Warmup",
                    "parent_id": 1,
                    "children": [],
                    "created_at": "2018-08-22 09:03:47",
                    "updated_at": "2018-08-22 09:03:47"
                },
                {
                    "id": 4,
                    "name": "Pliés",
                    "parent_id": 1,
                    "children": [],
                    "created_at": "2018-08-22 09:03:47",
                    "updated_at": "2018-08-22 09:03:47"
                },
                {
                    "id": 5,
                    "name": "Tendus (Slow)",
                    "parent_id": 1,
                    "children": [],
                    "created_at": "2018-08-22 09:03:47",
                    "updated_at": "2018-08-22 09:03:47"
                },
                {
                    "id": 6,
                    "name": "Tendus (Fast)",
                    "parent_id": 1,
                    "children": [],
                    "created_at": "2018-08-22 09:03:47",
                    "updated_at": "2018-08-22 09:03:47"
                },
                {
                    "id": 7,
                    "name": "Dégagés (Slow)",
                    "parent_id": 1,
                    "children": [],
                    "created_at": "2018-08-22 09:03:47",
                    "updated_at": "2018-08-22 09:03:47"
                },
                {
                    "id": 8,
                    "name": "Dégagés (Fast)",
                    "parent_id": 1,
                    "children": [],
                    "created_at": "2018-08-22 09:03:47",
                    "updated_at": "2018-08-22 09:03:47"
                },
                {
                    "id": 9,
                    "name": "Petits Battements",
                    "parent_id": 1,
                    "children": [],
                    "created_at": "2018-08-22 09:03:47",
                    "updated_at": "2018-08-22 09:03:47"
                },
                {
                    "id": 10,
                    "name": "Ronds de Jambe",
                    "parent_id": 1,
                    "children": [],
                    "created_at": "2018-08-22 09:03:47",
                    "updated_at": "2018-08-22 09:03:47"
                },
                {
                    "id": 11,
                    "name": "Adage",
                    "parent_id": 1,
                    "children": [],
                    "created_at": "2018-08-22 09:03:47",
                    "updated_at": "2018-08-22 09:03:47"
                },
                {
                    "id": 12,
                    "name": "Frappés",
                    "parent_id": 1,
                    "children": [],
                    "created_at": "2018-08-22 09:03:47",
                    "updated_at": "2018-08-22 09:03:47"
                },
                {
                    "id": 13,
                    "name": "Fondus",
                    "parent_id": 1,
                    "children": [],
                    "created_at": "2018-08-22 09:03:47",
                    "updated_at": "2018-08-22 09:03:47"
                },
                {
                    "id": 14,
                    "name": "Grands Battements",
                    "parent_id": 1,
                    "children": [],
                    "created_at": "2018-08-22 09:03:47",
                    "updated_at": "2018-08-22 09:03:47"
                },
                {
                    "id": 15,
                    "name": "Rises",
                    "parent_id": 1,
                    "children": [],
                    "created_at": "2018-08-22 09:03:47",
                    "updated_at": "2018-08-22 09:03:47"
                },
                {
                    "id": 16,
                    "name": "Stretch",
                    "parent_id": 1,
                    "children": [],
                    "created_at": "2018-08-22 09:03:47",
                    "updated_at": "2018-08-22 09:03:47"
                },
                {
                    "id": 17,
                    "name": "Tendus (Centre)",
                    "parent_id": 1,
                    "children": [],
                    "created_at": "2018-08-22 09:03:47",
                    "updated_at": "2018-08-22 09:03:47"
                },
                {
                    "id": 18,
                    "name": "Adage/PDB (Centre)",
                    "parent_id": 1,
                    "children": [],
                    "created_at": "2018-08-22 09:03:47",
                    "updated_at": "2018-08-22 09:03:47"
                },
                {
                    "id": 19,
                    "name": "Relevés",
                    "parent_id": 1,
                    "children": [],
                    "created_at": "2018-08-22 09:03:47",
                    "updated_at": "2018-08-22 09:03:47"
                },
                {
                    "id": 20,
                    "name": "Pirouettes",
                    "parent_id": 1,
                    "children": [],
                    "created_at": "2018-08-22 09:03:47",
                    "updated_at": "2018-08-22 09:03:47"
                },
                {
                    "id": 21,
                    "name": "Petit Allegro",
                    "parent_id": 1,
                    "children": [],
                    "created_at": "2018-08-22 09:03:47",
                    "updated_at": "2018-08-22 09:03:47"
                },
                {
                    "id": 22,
                    "name": "Medium Allegro",
                    "parent_id": 1,
                    "children": [],
                    "created_at": "2018-08-22 09:03:48",
                    "updated_at": "2018-08-22 09:03:48"
                },
                {
                    "id": 23,
                    "name": "Grand Allegro",
                    "parent_id": 1,
                    "children": [],
                    "created_at": "2018-08-22 09:03:48",
                    "updated_at": "2018-08-22 09:03:48"
                },
                {
                    "id": 24,
                    "name": "Men’s Allegro",
                    "parent_id": 1,
                    "children": [],
                    "created_at": "2018-08-22 09:03:48",
                    "updated_at": "2018-08-22 09:03:48"
                },
                {
                    "id": 25,
                    "name": "Traveling Centre (Odd Bits)",
                    "parent_id": 1,
                    "children": [],
                    "created_at": "2018-08-22 09:03:48",
                    "updated_at": "2018-08-22 09:03:48"
                },
                {
                    "id": 26,
                    "name": "Coda",
                    "parent_id": 1,
                    "children": [],
                    "created_at": "2018-08-22 09:03:48",
                    "updated_at": "2018-08-22 09:03:48"
                },
                {
                    "id": 27,
                    "name": "Révérence/Cool Down",
                    "parent_id": 1,
                    "children": [],
                    "created_at": "2018-08-22 09:03:48",
                    "updated_at": "2018-08-22 09:03:48"
                }
            ],
            "created_at": "2018-08-22 09:03:47",
            "updated_at": "2018-08-22 09:03:47"
        },
        {
            "id": 28,
            "name": "LENGTH",
            "parent_id": null,
            "children": [
                {
                    "id": 29,
                    "name": "All Lengths",
                    "parent_id": 28,
                    "children": [],
                    "created_at": "2018-08-22 09:03:48",
                    "updated_at": "2018-08-22 09:03:48"
                },
                {
                    "id": 30,
                    "name": "Short (__x4)",
                    "parent_id": 28,
                    "children": [],
                    "created_at": "2018-08-22 09:03:48",
                    "updated_at": "2018-08-22 09:03:48"
                },
                {
                    "id": 31,
                    "name": "Medium (__x8)",
                    "parent_id": 28,
                    "children": [],
                    "created_at": "2018-08-22 09:03:48",
                    "updated_at": "2018-08-22 09:03:48"
                },
                {
                    "id": 32,
                    "name": "Long (__x16)",
                    "parent_id": 28,
                    "children": [],
                    "created_at": "2018-08-22 09:03:48",
                    "updated_at": "2018-08-22 09:03:48"
                },
                {
                    "id": 33,
                    "name": "Marathon (__x32)",
                    "parent_id": 28,
                    "children": [],
                    "created_at": "2018-08-22 09:03:48",
                    "updated_at": "2018-08-22 09:03:48"
                },
                {
                    "id": 34,
                    "name": "Other",
                    "parent_id": 28,
                    "children": [],
                    "created_at": "2018-08-22 09:03:48",
                    "updated_at": "2018-08-22 09:03:48"
                }
            ],
            "created_at": "2018-08-22 09:03:48",
            "updated_at": "2018-08-22 09:03:48"
        }
    ]
}

Here is snippet of my Model class

var Lid: Int?
var Fid: Int?
var Lname: String!
var Fname: String!

public override func mapping(map: Map) {
    super.mapping(map: map)

    Lid   <- map["data.id"]
    Lname <- map["data.name"]
    Fid   <- map["data.children.id"]
    Fname  <- map["data.children.name"]
}

When I debug - the properties of my model class are nil. How could I take this response and end up with arrays of Lid and Lname?


Solution

  • you could do something like this

    struct Exercise: Mappable {
        var id: Int?
        var name: String?
        var parent_id: Int?
        var childrens: [Exercise]?
    
        init?(map: Map) {}
        mutating func mapping(map: Map) {
            id <- map["id"]
            name <- map["name"]
            parent_id <- map["parent_id"]
            childrens <- map["children"]
        }
    }
    

    And Map them like this

    func mapData(data: [String: Any]) {
        //the data here is the JSON of yours
    
        guard let exerciseArray = data["data"] as? [[String: Any]] else { return }
    
        //now we should be able to map array
        let mappedExercises = Mapper<Exercise>().mapArray(JSONArray: exerciseArray)
    }
    

    Now in new version of swift you can use Codable protocol to handle the encoding and decoding your models.