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过去看起来像这样：

{
    "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
        }
    ]
}

我的映射看起来像这样：

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，我得到了回复：

{
    "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
            }
        ]
    }
}

所以我把它添加到我的映射中：

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

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

这是我的课程：

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

@interface GetResponseInRegionResponseList : NSObject
{
    NSArray  *blobsList;
}

当我解析这个JSON时，我得到一个包含2个对象的JKArray的对象，这两个对象都是JKDictionary对象。很明显这是我的数据，但它是JKDictionary形式。它从未映射到GetResponseInRegionResponse类！

从阅读github文档看起来我想对数组使用toRelationship方法，但我只是没有看到它放在哪里。如果我按照“文章”示例试试这个：

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

我得到了这个例外：

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...'

那么如何在JSON中映射复杂对象的数组？

我感谢任何帮助。谢谢！

Answer 1

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，代码粘贴在下面：

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];

Answer 2

您是否尝试过只更改

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

反映数据数组的更改路径？

RestKit使用一组复杂对象进行映射

2 个答案: