Create String Arrays from JSON Response Alamofire
Question
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?
3 answers
solution1
0 ACCPTED 2018-08-23 02:35:36
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.
solution2
0 2018-08-23 04:39:39
In Swift 4 any third-party object mapper is obsolete because the built-in (De)Codable protocol is much more powerful.
The JSON contains a root object and a nested tree of objects with the same data structure.
This is a standalone version with Decodable , it is even able to decode the dates as Date instances
let jsonString = """
{
"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"
}
]
}
"""
struct Root : Decodable {
let status : String
let data : [Item]
}
struct Item : Decodable {
let name : String
let id : Int
let parentId : Int?
let children : [Item]
let createdAt, updatedAt : Date
}
do {
let data = Data(jsonString.utf8)
let dateFormatter = DateFormatter()
dateFormatter.locale = Locale(identifier: "en_US_POSIX")
dateFormatter.dateFormat = "yyyy-MM-dd HH:mm:ss"
decoder.dateDecodingStrategy = .formatted(dateFormatter)
decoder.keyDecodingStrategy = .convertFromSnakeCase
let result = try decoder.decode(Root.self, from: data)
print(result)
} catch { print(error) }
solution3
0 2018-08-23 04:49:37
https://github.com/schrockblock/eson
You can try Eson library which will directly convert your json into Array of Model class. It does Json Serialization and deserialization in swift .
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