Mapping to Swift Object issue showing nil using Al

Question

I m new to iOS and Swift development environment. I was trying to use Alamofire for pulling JSON and AlamofireObjectMapper for Mapping the retrieved JSON collections back to my Swift Object.

The issue is I m able to fetch the JSON thru Alamofire request and the count is shown, but the mapping part seems to be showing nil. Is something I had been missed out . Appreciate help.

Model Class

import UIKit
import CoreLocation
import ObjectMapper

class BranchObjectMapper : Mappable {
    // MARK: Properties
    var id: Int?
    var cityId: Int?
    var areaId: Int?
    var name: String?
    var nameAr: String?
    var branchAddr: String?
    var branchAddr2: String?
    var location: CLLocation?

    required init?(_ map: Map) {
        mapping(map)
    }

    func mapping(map: Map) {
        id     <- map["id"]
        cityId    <- map["cityId"]
        areaId  <- map["areaId"]
        name  <- map["name"]
        nameAr  <- map["nameAr"]
        branchAddr  <- map["branchAddr"]
        branchAddr2  <- map["branchAddr2"]
        location  <- map["location"]
    }

}

Request part in viewDidLoad()

 Alamofire.request(.GET, UrlEndpoints.branchUrl()).responseArray { (response: Response<[BranchObjectMapper], NSError>) in

    self.branchList = response.result.value!

    print(self.branchList.count) // count is correct

    for branch in self.branchList {      
        print(branch.id) // prints nil
        print(branch.id) // prints nil
    }
}

Thanks in advance

The complete JSON response looks like below. Have constructed only needed ones in Model.

[{"Id":"16","areaId":"17","name":"Al Aqiq”,”cityId”:4”,”Zip":"","nameAr":"\u0637\u0631\u064a\u0642 \u0627\u0644\u0645","branchAddr":"test","branchAddr2":"test"Latitude":"24.60425","Longitude":"46.629631","cityId":"1"}]

Answer 1

If you're having problems with mapping String and Int variables, it's because you forgot to add dynamic before var.

Example: dynamic var id : Int?

Answer 2

i think you are missing the right documentation of ObjectMapper lib. Check this Github ObjectMapper.

These are the types supported by the lib:

• Int
• Bool
• Double
• Float
• String
• RawRepresentable (Enums)
• Array<AnyObject>
• Dictionary<String, AnyObject>
• Object<T: Mappable>
• Array<T: Mappable>
• Array<Array<T: Mappable>>
• Set<T: Mappable>
• Dictionary<String, T: Mappable>
• Dictionary<String, Array<T:Mappable>>
• Optionals of all the above
• Implicitly Unwrapped Optionals of the above

So, if you are trying to map an Object not in that list, the result is nil.

In your case is var location: CLLocation?.

If you need to map CLLocation Object, one way is to map a CustomCLLocation with all properties as follows: JSON(i don't know your Json, this is an example)

"location":{
    "long": 43.666,
    "lat": 73.4
}

Swift: create another file "CustomCLLocation" for example like the first one but for mapping CLLocation with your Json

var latitude: Double?
var longitude: Double?

required init?(_ map: Map) {
mapping(map)

}
func mapping(map: Map) {

   longitude <- map["long"]
   latitude <- map["lat"]
}

and now, you can map an "fake" CLLocation Object: var location: CustomCLLocation?

Then if you want a really CLLocation. just create an Simply Extension like that(add it in the CustomCLLocation file):

extension CLLocation {
     public class func createFromCustomCLLocation(custom: CustomCLLocation) -> CLLocation {
         return self.init(custom.latitude,custom.longitude)
     }
}

Using the conversion:

var locationCLL = CLLocation.createFromCustomCLLocation(location) // now is a CLLocation

Edited: Alamofire Request

I have the same request on my app with the last version of AlamofireObjectMapper for ios 8.0 +

Alamofire.request(.GET, UrlEndpoints.branchUrl()).responseArray { (response: [BranchObjectMapper]?, error : ErrorType?) in
    if(error != nil) {
        print(error)
    }else{
        print("data downloaded")


        if let response = response {
            branchList(response)
            for branch in self.branchList {
                print(branch.id)
                print(branch.name)
            }
        }
    }
}