ios - ObjectMapper 无法序列化响应错误代码=2

Question

我在使用 Alamofire 对象映射器访问 Alamofire 获取请求时遇到错误

这就是我使用 API 的方式-

APIService.shared.getSlots{ (success,weekSlots, error) in
    if success {
    self.weekSlots = weekSlots!
    print("success!!")
  } else {
    print(error?.errorMessage ?? "NOPE")
  }
}

而 APIService 类中的 getSlot 函数是-

open func getSlots(completion: @escaping (Bool, [WeekSlot]?, APIError?) -> ()) {
sessionManager.request(APIRouter.getSlots())
  .validate(statusCode: 200..<300)
  .responseArray(queue: nil,
                  keyPath: "week_slots",
                  context: nil) { (response: DataResponse<[WeekSlot]>) in
                    switch response.result {
                    case .success(let value):
                      self.saveArraysToRealm(value: value)
                      completion(true,value, nil)
                    case .failure:
                      let error = self.processFailure(json: JSON(response.data as Any))
                      completion(false, nil, error)
                      print(error)
                    }
  }
}

这是我的数据模型:

import Foundation
import ObjectMapper
import RealmSwift

class WeekSlot: Object, Mappable {
  dynamic var date : String? = ""
  var slot = List<Slots>()

  //Impl. of Mappable protocol
  required convenience init?(map: Map) {
  self.init()
  }

  func mapping(map: Map) {
    date <- map["date"]
    slot <- (map["slots"], ArrayTransform<Slots>())
  }
}

我声明了执行get请求的请求，url也是正确的。除了由 sessionManager 处理的身份验证 token 外，API 不接受任何参数。但是，我在调试时收到以下响应错误-

[Request]: GET http://beta.xamidea.in/api/v1/teachers/get_slots/
[Response]: <NSHTTPURLResponse: 0x600000434c80> { URL: http://beta.xamidea.in/api/v1/teachers/get_slots/ } { status code: 200, headers {
Allow = "GET, POST, HEAD, OPTIONS";
Connection = "keep-alive";
"Content-Length" = 477;
"Content-Type" = "application/json";
Date = "Tue, 10 Oct 2017 11:01:53 GMT";
Server = "nginx/1.10.3 (Ubuntu)";
Vary = Accept;
"X-Frame-Options" = SAMEORIGIN;
} }
[Data]: 477 bytes
[Result]: FAILURE: Error Domain=com.alamofireobjectmapper.error Code=2    "ObjectMapper failed to serialize response." UserInfo=.   {NSLocalizedFailureReason=ObjectMapper failed to serialize response.}
[Timeline]: Timeline: { "Request Start Time": 529326113.851, "Initial  Response Time": 529326113.985, "Request Completed Time": 529326113.986,   "Serialization Completed Time": 529326113.987, "Latency": 0.134 secs,    "Request Duration": 0.135 secs, "Serialization Duration": 0.001 secs,   "Total Duration": 0.136 secs }
  ▿ request : Optional<URLRequest>
▿ some : http://beta.xamidea.in/api/v1/teachers/get_slots/
  ▿ url : Optional<URL>
    ▿ some : http://beta.xamidea.in/api/v1/teachers/get_slots/
  - cachePolicy : 0
  - timeoutInterval : 60.0
  - mainDocumentURL : nil
  - networkServiceType : __ObjC.NSURLRequest.NetworkServiceType
  - allowsCellularAccess : true
  ▿ httpMethod : Optional<String>
    - some : "GET"
  ▿ allHTTPHeaderFields : Optional<Dictionary<String, String>>
    ▿ some : 1 element
      ▿ 0 : 2 elements
        - key : "Authorization"
        - value : "Token 4d7ebe501bcd7c910cf1950ab53bc8aa2a4a569d"
  - httpBody : nil
  - httpBodyStream : nil
  - httpShouldHandleCookies : true
  - httpShouldUsePipelining : false
  ▿ response : Optional<NSHTTPURLResponse>
  ▿ data : Optional<Data>
▿ some : 477 bytes
  - count : 477
  ▿ pointer : 0x00007f896a48aa80
    - pointerValue : 140228170394240
  ▿ result : FAILURE: Error Domain=com.alamofireobjectmapper.error  Code=2 "ObjectMapper failed to serialize response." UserInfo= {NSLocalizedFailureReason=ObjectMapper failed to serialize response.}
  ▿ timeline : Timeline: { "Request Start Time": 529326113.851, "Initial Response Time": 529326113.985, "Request Completed Time": 529326113.986, "Serialization Completed Time": 529326113.987, "Latency": 0.134 secs, "Request Duration": 0.135 secs, "Serialization Duration": 0.001 secs, "Total Duration": 0.136 secs }
- requestStartTime : 529326113.85062999
- initialResponseTime : 529326113.98505801
- requestCompletedTime : 529326113.98612601
- serializationCompletedTime : 529326113.986781
- latency : 0.13442802429199219
- requestDuration : 0.13549602031707764
- serializationDuration : 0.00065499544143676758
- totalDuration : 0.1361510157585144
  ▿ _metrics : Optional<AnyObject>

这个错误是什么意思？？

API 对成功的响应是这样的-

  {
    "result": {
        "week_slots": [
            {
                "date": "2017-10-10",
                "slots": []
        },
        {
            "date": "2017-10-11",
            "slots": [
                {
                    "start": "2017-10-11T20:00:00Z",
                    "end": "2017-10-11T21:00:00Z",
                    "availability": true,
                    "booked": false
                },
                {
                    "start": "2017-10-11T10:00:00Z",
                    "end": "2017-10-11T12:00:00Z",
                    "availability": true,
                    "booked": false
                }
            ]
        },
        {
            "date": "2017-10-12",
            "slots": []
        },
        {
            "date": "2017-10-13",
            "slots": []
        },
        {
            "date": "2017-10-14",
            "slots": []
        },
        {
            "date": "2017-10-15",
            "slots": []
        },
        {
            "date": "2017-10-16",
            "slots": []
        }
    ]
},
"success": true,
"error": {}
}

Answer 1

我在 1 天后找到了解决方案，问题出在访问“week_slots”的 keyPath 中，因为我使用的是 swiftyjson，正确的访问方式是:

keyPath: "result.week_slots"

所以基本上每当您收到此错误，即使响应是成功的，那也是因为您无法正确映射模型中的响应