ios - 在Restkit中设置映射的rootkeypath

Question

我有以下 JSON:

{
        "IdList": [
        "1",
        "2",
        "3",
        "4",
        "5",
        "6",
        "7",
        "8",
        "9",
        "10"
        ],
        “Persons”: [
        {
        "Id": 2,
        "Name": “James”,
        "Description": “Tall”,
        "Items": [

        {
        "Id": 1051,
        "Name": “Hat”,
        "Description": "",
        “Accesories”: []
        }]
    ]}

我是这样使用 RKResponseDescriptor 的:

 RKResponseDescriptor *responseDescriptor = [RKResponseDescriptor responseDescriptorWithMapping:[MappingProvider validationMapping] method:RKRequestMethodGET pathPattern:nil keyPath:nil statusCodes:RKStatusCodeIndexSetForClass(RKStatusCodeClassSuccessful)];
    [self addResponseDescriptor:responseDescriptor];

我的验证映射包含以下内容:

    + (RKDynamicMapping *)validationMapping {

        RKDynamicMapping * dynamicMapping = [RKDynamicMapping new];

        [dynamicMapping setObjectMappingForRepresentationBlock:^RKObjectMapping *(id representation) {

            NSArray *personsAray = [representation objectForKey:@"Persons"];

            if (!personArray || !personArray.count) {
                //Fail operation no contents 
                return nil;


            }else {

                NSArray *idsArray = [representation objectForKey:@"IdList"];

                if (!idsArray || !idsArray.count) {
                     //Fail operation no contents 
                    return nil;

                }else {

                    if (idsArray) {

                        [[NSUserDefaults standardUserDefaults] setObject:idsArray forKey:kIds];
                    }

                    [[NSUserDefaults standardUserDefaults] synchronize];

                }

               NSArray *categoryArray = [menuArray valueForKey:@"Items"];

                    if (!categoryArray || !categoryArray.count) {

                        return nil;
                    }else {

                        // If we have some data map the response!
                        return [self theMapping];

                    }

            }

            return nil;

        }];

        return dynamicMapping;



    }

    + (RKEntityMapping *)theMapping {
        RKEntityMapping *mapping = [RKEntityMapping mappingForEntityForName:@"Person" inManagedObjectStore:[[CoreDataManager sharedInstance] objectStore]];

// I want to start the mapping from Person, how do I do that?
        [mapping mappingForSourceKeyPath:@"Persons"];


        mapping.assignsNilForMissingRelationships = YES;
        mapping.assignsDefaultValueForMissingAttributes = YES;

        [mapping addAttributeMappingsFromDictionary:@{
                                                      @"Id": @"remoteID",
                                                      @"Name": @"name",
                                                      }];


        mapping.identificationAttributes = @[ @"remoteID" ];

        [mapping addPropertyMapping:[RKRelationshipMapping relationshipMappingFromKeyPath:@"Items"
                                                                                       toKeyPath:@"misc"
                                                                                     withMapping:[MappingProvider productMapping]]];




        return mapping;
    }

如何告诉 restKit 从我的“theMapping”方法中的 Persons 键路径开始映射？我试过使用 [mapping mappingForSourceKeyPath:@"Persons"]; 但没有成功。

Answer 1

在这种情况下，您通常会使用 2 个响应描述符。

您的第一个响应描述符将使用键路径为 IdList 的动态映射。这有点滥用，并将表示存储为用户默认值并返回 nil。

您的第二个响应描述符将使用带有 Items 键路径的法线映射(从外观上看，尽管您的代码使用 undefined variable )，并且依赖 RestKit 不执行任何映射(如果存在)没有结果(尽管在有要删除的获取请求 block 的情况下，您需要使用另一个动态映射)。

mappingForSourceKeyPath: 返回具有指定键路径的接收器上的属性映射，因此与您想要执行的操作完全无关。它是响应描述符上深入数据结构的关键路径。您可以使用映射中的关键路径进行钻取，但这会钻取到对象，而不是字典。