如何使用对象映射器从响应 JSON 映射子数组？

Posted 2023-02-24

【中文标题】如何使用对象映射器从响应 JSON 映射子数组？

【英文标题】：How to map child array from the response JSON using object mapper?

【发布时间】：2016-12-26 11:05:22

【问题描述】：

我正在使用Alamofire 和Alamofire Object Mapper。

认为这是来自网络服务的响应：

  "status": 200,
  "error": false,
  "response": 
    "id": 9,
    "parent_id": 0,
    "company_id": 1,
    "image": "",
    "name": "Games",
    "description": "Games",
    "created_at": "2016-12-16 12:11:51",
    "updated_at": "2016-12-16 12:11:51",
    "deleted_at": null,
    "Games": [
      
        "id": 36,
        "company_id": 1,
        "application_id": 7,
        "category_id": 9,
        "start_date": "2016-12-16 00:00:00",
        "end_date": "2016-12-27 00:00:00",
        "status": "PUBLISH",
        "created_at": "2016-12-16 13:29:16",
        "updated_at": "2016-12-16 13:29:48",
        "deleted_at": null
      
    ]
  ,
  "error_messages": [],
  "error_message": ""

从这个响应中我想得到Games 数组。

这是我的Games 模型

    var gameId : String!
    var companyID : String!
    var categoryID : String!
    var startDate : String!
    var endDate : String!
    var status : String!
    var buildertitle : String!
    var builderdescription : String!



    override init() 
        super.init()
    

    required convenience init?(map : Map) 
        self.init()
    

    func mapping(map: Map) 

        gameId <- map["id"]
        companyID <- map["company_id"]
        categoryID <- map["category_id"]
        startDate <- map["start_date"]
        endDate <- map["end_date"]
        status <- map["status"]
        buildertitle <- map["title"]
        builderdescription <- map["description"]

    

    init(dic : NSDictionary) 
        super.init()

        gameId = Utils.nulltoEmpty(dic["id"] as AnyObject) as! String
        companyID = Utils.nulltoEmpty(dic["company_id"] as AnyObject) as! String
        categoryID = Utils.nulltoEmpty(dic["category_id"] as AnyObject) as! String
        startDate = Utils.nulltoEmpty(dic["start_date"] as AnyObject) as! String
        endDate = Utils.nulltoEmpty(dic["end_date"] as AnyObject) as! String
        status = Utils.nulltoEmpty(dic["status"] as AnyObject) as! String
        buildertitle = Utils.nulltoEmpty(dic["title"] as AnyObject) as! String
        builderdescription = Utils.nulltoEmpty(dic["description"] as AnyObject) as! String

    

这是我的response 模型

var status : Int!
    var user : User?
    var errorMessage : String?
    var device : Device?
    var games : Games?

    required convenience init?(map : Map) 
        self.init()
    


    func mapping(map: Map) 
        status <- map["status"]
        user <- map["response"]
        errorMessage <- map["error_message"]
        device <- map["response"]
        games <- map["Games"]
    

最后这是我对 alamofire 的要求

func getGamesList () 
    let UrlReqeust = Router.getUserNews().urlRequest

    Alamofire.request(UrlReqeust!).responseArray (response : DataResponse<[Games]>) in

        print("The status code is : \(response.response?.statusCode)")
        print("the response is : \(response)")

        switch response.result 
        case .success(let gamesbuilder):

            print("the result is : \(gamesbuilder)")

            break
        case .failure(let Error):
            break
        



    

如果我使用responseString 而不是responseArray，它会给出String。否则，它会给出如下所示的成功状态代码错误。

"状态码为：可选(200) 响应是：FAILURE: Error Domain=com.alamofireobjectmapper.error Code=2“ObjectMapper 无法序列化响应。” UserInfo=NSLocalizedFailureReason=ObjectMapper 序列化响应失败。"

另一部分是，所有responses 都在response 键下。那么我该如何过滤这些。

希望您对此有所帮助。

【参考方案1】：

你试过responseArray(keyPath: "Games")或responseArray(keyPath: "response.Games")吗？因为您映射不知道如何解析所有字段。