Using Alamofire and Objectmapper the integer value always zero

Question

I am using Alamofire with ObjectMapper and my model class is like that

class Category: Object, Mappable {

dynamic var id: Int = 0
dynamic var name = ""
dynamic var thumbnail = ""
var children = List<Category>()


override static func primaryKey() -> String? {
    return "id"
}


required convenience init?(_ map: Map) {
    self.init()
}

func mapping(map: Map) {
    id <- map["id"]
    name <- map["name"]
    thumbnail <- map["thumbnail"]
    children <- map["children"]
}

}

and I am using Alamofire like that

 Alamofire.request(.GET, url).responseArray { (response: Response<[Category], NSError>) in

        let categories = response.result.value

        if let categories = categories {
            for category in categories {
                print(category.id)
                print(category.name)
            }
        }
    }

the id is always zero, I don't know why?

Does the "id" field exist in the JSON file? If it does not, your initial value of zero will remain. Is the value in quotes in the JSON file? If it is, then it's a string. I don't know if ObjectMapper will convert it to Int. — Bob Wakefield, Jan 31 '16 at 20:45
you are right the value of "id" in quotes in JSON file if I removed the quotes it can map the value. Thanks @BobWakefield — Ayman, Feb 01 '16 at 09:42

score 10 · Answer 1 · answered Feb 01 '16 at 09:51

10

I fixed it by adding transformation in the mapping function in model class like that

id <- (map["id"], TransformOf<Int, String>(fromJSON: { Int($0!) }, toJSON: { $0.map { String($0) } }))

thanks to @BobWakefield

answered Feb 01 '16 at 09:51

Ayman

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1
13

1

I added my comment to an answer. Can you change the correct answer so I get credit for it? Thanks. – Bob Wakefield Jun 07 '16 at 15:24
i used it for int in json to string in object parsing, but i am not able to get rid of Optional() – rd_ Mar 11 '17 at 06:28

score 3 · Accepted Answer · answered Mar 30 '16 at 23:06

Does the "id" field exist in the JSON file? If it does not, your initial value of zero will remain. Is the value in quotes in the JSON file? If it is, then it's a string. I don't know if ObjectMapper will convert it to Int.

Moved my comment to an answer.

Using Alamofire and Objectmapper the integer value always zero

2 Answers2