Alamofire responseArray String array for keyPath - swift

Question

I have a rest call which returns array of string [String] for keyPath "data", for example...
{
"data": [
"1",
"3",
"5",
"2",
"4",
"9"
]
}
I am trying to get it via responseArray(keyPath: "data"), but get compile error for line *.responseArray(keyPath: "data") {(response: DataResponse<[String]>) in*
Cannot convert value of type '(DataResponse<[String]>) -> ()' to expected argument type '(DataResponse<[_]>) -> Void'
Part of request example
alamofireManager.request(url)
.responseArray(keyPath: "data") {(response: DataResponse<[String]>) in
if response.result.isSuccess {
if let data = response.result.value {
//process success
} else {
// handle error
}
}
...
Does anybody of you know how to do it ?

Answer 1

The problem is that String isn't Mappable. As per https://github.com/Hearst-DD/ObjectMapper/issues/487, these are the proposed solutions:
In this situation I would recommend accessing the data directly from the Alamofire response. You should be able to simply cast it to [String].
Alternatively, you may be able to subclass String and make the subclass Mappable, however I think that is more work than necessary for the your situation
Using Swift's 4 Codable (no external dependencies):
struct APIResponse: Decodable {
let data: [String]
}
let url = "https://api.myjson.com/bins/1cm14l"
Alamofire.request(url).responseData { (response) in
if response.result.isSuccess {
if let jsonData = response.result.value,
let values = try? JSONDecoder().decode(APIResponse.self, from: jsonData).data {
//process success
print(values)
} else {
// handle error
}
}
}