RestKit使用复杂对象数组映射

Question

我一直在很好地解析我的JSON，但我的服务器只是改变了我。我的JSON用于这个样子：

{ 
    "blobs": [ 
     { 
      "createdOn": "2012-03-16T15:13:12.551Z", 
      "description": "Fake description", 
      "hint": "And a useless hint", 
      "id": 400, 
      "name": "Fake CA one", 
      "publicId": "FF6", 
      "type": 0 
     }, 
     { 
      "createdOn": "2012-03-16T17:33:48.514Z", 
      "description": "No hint on this one, but it does have a description.", 
      "hint": "Hint", 
      "id": 402, 
      "name": "Second fake one in CA", 
      "publicId": "FF8", 
      "type": 0 
     } 
    ] 
} 

和我的映射是这样的：

RKObjectMapping* blobMapping = [RKObjectMapping mappingForClass:[GetResponseInRegionResponse class]]; 

[blobMapping mapKeyPath:@"name" toAttribute:@"name"]; 
[blobMapping mapKeyPath:@"id" toAttribute:@"blobId"]; 
[blobMapping mapKeyPath:@"description" toAttribute:@"description"]; 
[blobMapping mapKeyPath:@"hint" toAttribute:@"hint"]; 

[[RKObjectManager sharedManager].mappingProvider setMapping:blobMapping forKeyPath:@"blobs"]; 

现在我的服务器已经改变了，我得到这个回：

{ 
    "blobsList": { 
     "blobs": [ 
      { 
       "createdOn" :"2012-03-16T15:13:12.551Z", 
       "description": "Fake description", 
       "hint": "And a useless hint", 
       "id": 400, 
       "name": "Fake CA one", 
       "publicId": "FF6", 
       "type": 0 
      }, 
      { 
       "createdOn": "2012-03-16T17:33:48.514Z", 
       "description": "No hint on this one, but it does have a description.", 
       "hint": "Hint", 
       "id": 402, 
       "name": "Second fake one in CA", 
       "publicId": "FF8", 
       "type": 0 
      } 
     ] 
    } 
} 

所以我添加这对我的映射：

RKObjectMapping* blobsListMapping = [RKObjectMapping mappingForClass:[GetResponseInRegionResponseList class]]; 
[blobsListMapping mapKeyPath:@"blobsList" toAttribute:@"blobsList"]; 

[[RKObjectManager sharedManager].mappingProvider setMapping:blobsListMapping forKeyPath:@"blobsList"]; 

，并且是我的职业：

@interface GetResponseInRegionResponse : NSObject 
{ 
    NSString* name; 
    NSString* blobId; 
    NSString* description; 
    NSString* hint; 
}  

@interface GetResponseInRegionResponseList : NSObject 
{ 
    NSArray *blobsList; 
} 

当我解析此JSON，我得到一个其中有2个对象的JKArray，这两个都是JKDictionary对象一个对象。很明显，这是我的数据，但它是以JKDictionary的形式。它从未映射到GetResponseInRegionResponse类！

从阅读github文档，它看起来像我想使用数组的toRelationship方法，但我只是没有看到它放在哪里。如果我按照“公司章程”的例子，并尝试这个办法：

[blobListMapping mapKeyPath:@"blobs" toAttribute:@"blobsList"]; 
[blobListMapping mapKeyPath:@"blobs" toRelationship:@"blobsList" withMapping:blobMapping]; 

我得到这个异常：

2012-03-19 14:59:53.704 Ferret[8933:16303] *** Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'Unable to add mapping for keyPath blobsList, one already exists...' 

所以，我怎么能映射复杂对象的阵列我的JSON里面？

我很感激任何帮助。谢谢！

Answer 1

您是否尝试过只改变

[[RKObjectManager sharedManager].mappingProvider setMapping:blobMapping forKeyPath:@"blobsList.blobs"]; 

，以反映更改路径，您的数据阵列？

Answer 2

接受的答案似乎是针对当前版本v0.2之前的版本。我的解决方案看起来略有不同，代码粘贴如下：

RKObjectMapping * eventMapping = [RKObjectMapping mappingForClass:[RKJMEvent class]]; 
[eventMapping addAttributeMappingsFromDictionary:[RKJMEvent map]]; 

RKObjectMapping * eventResponseMapping =[RKObjectMapping mappingForClass:[RKJMEventsResponse class]]; 
[eventResponseMapping addAttributeMappingsFromDictionary:[RKJMEventsResponse map]]; 
[eventResponseMapping addRelationshipMappingWithSourceKeyPath:@"events" mapping:eventMapping]; 


RKResponseDescriptor *responseDescriptorEventResponse = [RKResponseDescriptor responseDescriptorWithMapping:eventResponseMapping 
                        pathPattern:API_GET_EVENTS_PATH 
                         keyPath:nil 
                        statusCodes:RKStatusCodeIndexSetForClass(RKStatusCodeClassSuccessful)]; 
[objectManager addResponseDescriptor:responseDescriptorEventResponse];