ios – ObjectMapper无法序列化响应错误Code = 2

这就是我如何击中API-

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>())
  }
}

我已经声明了执行get请求的请求,并且url也是正确的.除了由sessionManager处理的auth令牌之外,API不接受任何参数.但是,我在调试时得到以下错误响应 –

[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,"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>

这个错误意味着什么？

API对成功的回应是 –

{
    "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","booked": false
                }
            ]
        },{
            "date": "2017-10-12",{
            "date": "2017-10-13",{
            "date": "2017-10-14",{
            "date": "2017-10-15",{
            "date": "2017-10-16","slots": []
        }
    ]
},"success": true,"error": {}
}