Ios RestKit 0.2*-使用RKRelationshipMapping映射多级关系

因此有一个JSON文件如下：

{
  "eventList" : [
    {
      "eventID" : 1,
      "comment" : "Connected at place.",
      "eventTypes" : [
        {
          "eventContextTypes" : [
            {
              "eventContextTypeID" : 14,
              "eventContextTypeText" : "Hospital",
            }
          ],
          "eventTypeID" : 2,
          "eventTypeText" : "Connection"
        }
      ],
      "submittedDate" : "2014-07-16T20:24:04Z"
    },
    {
      "eventID" : 2,
      "comment" : "Connected at place.",
      "eventTypes" : [
        {
          "eventContextTypes" : [
            {
              "eventContextTypeID" : 11,
              "eventContextTypeText" : "Location"
            }
          ],
          "eventTypeID" : 2,
          "eventTypeText" : "Connection"
        }
      ],
      "submittedDate" : "2014-06-16T20:10:51Z"
    }
  ]
}

[eventTypeMapping addPropertyMappingsFromArray:@[[RKRelationshipMapping relationshipMappingFromKeyPath:EventTypeRelationships.eventContextTypes
                                                                                             toKeyPath:EventTypeRelationships.eventContextTypes
                                                                                           withMapping:eventContextTypeMapping]]];

[newsFeedMapping addPropertyMappingsFromArray:@[[RKRelationshipMapping relationshipMappingFromKeyPath:@"eventList"
                                                                                            toKeyPath:@"eventList"
                                                                                          withMapping:eventTypeMapping]]];

在我的应用程序中，我确实有多个调用，其中有EventType调用，映射如下：

{
  "eventList" : [
    {
      "eventID" : 1,
      "comment" : "Connected at place.",
      "eventTypes" : [
        {
          "eventContextTypes" : [
            {
              "eventContextTypeID" : 14,
              "eventContextTypeText" : "Hospital",
            }
          ],
          "eventTypeID" : 2,
          "eventTypeText" : "Connection"
        }
      ],
      "submittedDate" : "2014-07-16T20:24:04Z"
    },
    {
      "eventID" : 2,
      "comment" : "Connected at place.",
      "eventTypes" : [
        {
          "eventContextTypes" : [
            {
              "eventContextTypeID" : 11,
              "eventContextTypeText" : "Location"
            }
          ],
          "eventTypeID" : 2,
          "eventTypeText" : "Connection"
        }
      ],
      "submittedDate" : "2014-06-16T20:10:51Z"
    }
  ]
}

[eventTypeMapping addPropertyMappingsFromArray:@[[RKRelationshipMapping relationshipMappingFromKeyPath:EventTypeRelationships.eventContextTypes
                                                                                             toKeyPath:EventTypeRelationships.eventContextTypes
                                                                                           withMapping:eventContextTypeMapping]]];

[newsFeedMapping addPropertyMappingsFromArray:@[[RKRelationshipMapping relationshipMappingFromKeyPath:@"eventList"
                                                                                            toKeyPath:@"eventList"
                                                                                          withMapping:eventTypeMapping]]];

然后调用eventList，映射如下：

{
  "eventList" : [
    {
      "eventID" : 1,
      "comment" : "Connected at place.",
      "eventTypes" : [
        {
          "eventContextTypes" : [
            {
              "eventContextTypeID" : 14,
              "eventContextTypeText" : "Hospital",
            }
          ],
          "eventTypeID" : 2,
          "eventTypeText" : "Connection"
        }
      ],
      "submittedDate" : "2014-07-16T20:24:04Z"
    },
    {
      "eventID" : 2,
      "comment" : "Connected at place.",
      "eventTypes" : [
        {
          "eventContextTypes" : [
            {
              "eventContextTypeID" : 11,
              "eventContextTypeText" : "Location"
            }
          ],
          "eventTypeID" : 2,
          "eventTypeText" : "Connection"
        }
      ],
      "submittedDate" : "2014-06-16T20:10:51Z"
    }
  ]
}

[eventTypeMapping addPropertyMappingsFromArray:@[[RKRelationshipMapping relationshipMappingFromKeyPath:EventTypeRelationships.eventContextTypes
                                                                                             toKeyPath:EventTypeRelationships.eventContextTypes
                                                                                           withMapping:eventContextTypeMapping]]];

[newsFeedMapping addPropertyMappingsFromArray:@[[RKRelationshipMapping relationshipMappingFromKeyPath:@"eventList"
                                                                                            toKeyPath:@"eventList"
                                                                                          withMapping:eventTypeMapping]]];

问题在于映射eventContextTypes的值。出于某些原因，它只保存最后一个映射对象的映射数据。例如，当我调用JSON文件时，它映射Hospital，然后用第一个对象数组中的第二个值Location覆盖它。我做错了什么

提前谢谢

EventTypeMapping和EventContextMapping的定义如下：

RKObjectMapping *eventTypeMapping = [EventType mapping];
RKObjectMapping *eventContextTypeMapping = [EventContextType mapping];

======更新======

下面是EventTypes和EventContextType的映射函数

以及EventContextType映射：

以下是模型设计：

---

==========更新结束========

您有任何标识属性吗？您应该显示完整的映射和模型类定义…@Wain是的，我设置了标识属性。当我把它放在JSON中的两个层次上，或者直接调用这些单独的对象时，映射就会起作用。当它有三层时，它似乎覆盖了所有的值。顺便说一句，我已经更新了问题。在运行请求并处理响应之后，从数据存储中获取所有内容并查找重复的对象，有些有关系，有些没有关系-是否存在。你有很多循环关系，那么它们是如何被填充的呢？当您说它映射医院，然后用位置覆盖它时，您如何通过关系内容验证它。这可能是一个新闻源标识或关系填充问题，但我还不确定…@Wain，我运行了请求，处理了它，从存储中取出，并打印出包含所有关系和数据的值。根据JSON，它们具有正确的关系，但没有重复项，标识属性似乎正常工作。当我说它映射医院，然后用Location覆盖它时，我的意思是第一个对象正确地映射了Event->EventType->EventContextType和其中的正确值。但是在映射第二个对象时，第一个对象的EventContextType更改为第二个对象的位置。因此，我修改了JSON，将EventTypes和EventContextTypes作为两个不同的对象，而不是嵌套在原始结构中。这个结构适合我。但是，如果你或任何阅读本文的人能够解释我最初的问题发生的原因，那就太好了。