RestKit Mapping的关系错误

Question

我真的不明白我为什么会有错误：/ 有人可以看一下吗？

Json文件：

{
"total_count": 3,
"incomplete_results": false,
"winners": [
    {
        "windate": "2015-05-26 17:11:30.0",
        "gift": "foo",
        "email": "foo",
        "giftack": "foo",
        "lastname": "foo",
        "gender": "foo",
        "firstname": "foo",
        "updategiftdate":null
    }
],
"nbWinners": 3
}

映射文件：

    //Winner List Mapping
RKEntityMapping *winnerListMapping =
    [RKEntityMapping mappingForEntityForName:@"WinnerList"
                        inManagedObjectStore:managedObjectStore];
winnerListMapping.identificationAttributes = @[@"nbWinners"];
[winnerListMapping addAttributeMappingsFromDictionary:@{
                                    @"total_count" : @"totalCount",
                             @"incomplete_results" : @"incompleteResults",
                                      @"nbWinners" : @"nbWinners" }];

//Winner Mapping
RKEntityMapping *winnerMapping =
    [RKEntityMapping mappingForEntityForName:@"Winner"
                        inManagedObjectStore:managedObjectStore];
winnerMapping.identificationAttributes = @[@"winDate"];
[winnerMapping addAttributeMappingsFromArray:@[
                                            @"windate", @"gift", @"email", @"giftack", @"lastname", @"gender", @"firstname", @"updategiftdate"]];

//Link Winner to WinnerList
[winnerListMapping addPropertyMapping:
    [RKRelationshipMapping relationshipMappingFromKeyPath:@"winners"
                                                toKeyPath:@"winners"
                                              withMapping:winnerMapping]];

//Run Mapping
RKResponseDescriptor *winnerListResponseDescriptor =
[RKResponseDescriptor responseDescriptorWithMapping:winnerListMapping
                                             method:RKRequestMethodGET
                                        pathPattern:@"example.json"
                                            keyPath:nil
                                        statusCodes:RKStatusCodeIndexSetForClass(RKStatusCodeClassSuccessful)
 ];
[objectManager addResponseDescriptor:winnerListResponseDescriptor];

数据模型：

最后：

2015-09-16 10:13:25.018 iDol Check[26031:954937] 
(
    "<WinnerList: 0x7f9d0167f4b0> (entity: WinnerList; id: 0xd0000000000c0000 <x-coredata://7E40E0FD-3677-45EA-9BD1-59F755C05BC5/WinnerList/p3> ; data: {\n    incompleteResults = 0;\n    nbWinners = 3;\n    totalCount = 3;\n    winners = \"<relationship fault: 0x7f9d0167afa0 'winners'>\";\n})"
)

提前感谢您的帮助！

Answer 1

我认为这是错误。

//Link Winner to WinnerList
[winnerListMapping addPropertyMapping:
    [RKRelationshipMapping relationshipMappingFromKeyPath:@"winners"
                                                toKeyPath:@"winners"
                                              withMapping:winnerMapping]];

具体而言，您的获胜者模型的toKeyPath:@"winners"没有winners属性。