没有添加RestKit外键关系映射

Question

关于RestKit和外键关系映射的问题很少。

在开始我的问题之前，这里有适当的工作和正常工作。

1. 核心数据模型



收藏夹具有以下属性：

placeIds：包含定义为用户最喜欢的地方的地点ID的可转换类型。

1. RestKit

一个。用户数据映射

RKEntityMapping *entityMapping = [RKEntityMapping mappingForEntityForName:[self entityName]
                                                     inManagedObjectStore:[RKManagedObjectStore defaultStore]];

[entityMapping addAttributeMappingsFromDictionary:@{@"id":@"userId"}];
entityMapping.identificationAttributes = @[ @"userId" ];
[entityMapping addPropertyMapping:[RKRelationshipMapping relationshipMappingFromKeyPath:@"favorites" toKeyPath:@"favorites" withMapping:[AOFavorite mapping]]];

[entityMapping setAssignsDefaultValueForMissingAttributes:YES];
[entityMapping setAssignsNilForMissingRelationships:YES];

湾最喜欢的数据映射

RKEntityMapping *entityMapping = [RKEntityMapping mappingForEntityForName:[self entityName]
                                                     inManagedObjectStore:[RKManagedObjectStore defaultStore]];

[entityMapping addAttributeMappingsFromDictionary:@{@"placeIds":@"placeIds"}];
entityMapping.identificationAttributes = @[ @"userId" ];
[entityMapping addConnection:[AOFavorite placesConnection]];

[entityMapping setAssignsDefaultValueForMissingAttributes:YES];
[entityMapping setAssignsNilForMissingRelationships:YES];

+ (RKConnectionDescription *)placesConnection
{
    NSEntityDescription *entity = [NSEntityDescription entityForName:[self entityName]
                                              inManagedObjectContext:[RKManagedObjectStore defaultStore].mainQueueManagedObjectContext];
    NSRelationshipDescription *places = [entity relationshipsByName][@"places"];
    return [[RKConnectionDescription alloc] initWithRelationship:places attributes:@{ @"placeIds": @"placeId" }];
}

℃。放置数据映射

RKEntityMapping *entityMapping = [RKEntityMapping mappingForEntityForName:[self entityName]
                                                     inManagedObjectStore:[RKManagedObjectStore defaultStore]];

[entityMapping addAttributeMappingsFromDictionary:@{@"id":@"placeId"}];
entityMapping.identificationAttributes = @[ @"placeId" ];

[entityMapping setAssignsDefaultValueForMissingAttributes:YES];
[entityMapping setAssignsNilForMissingRelationships:YES];

用户实体已将登录的用户对象正确地放入持久存储中。

由于API为用户最喜欢的地方提供了一系列ID，因此将它们存储到用户＆gt;收藏＆gt; placeIds

-

我使用以下方法请求API的对象获取收藏夹与Place定义的关系：

[[[[RKObjectManager sharedManager] router] routeSet] addRoute:[RKRoute routeWithRelationshipName:@"favorite/places"
                                                                                     objectClass:[AOFavorite class]
                                                                                     pathPattern:@"user/favorite/places"
                                                                                          method:RKRequestMethodGET]];

[[RKObjectManager sharedManager] getObjectsAtPathForRelationship:@"favorite/places"
                                                        ofObject:[[AOUser currentUser] favorites]
                                                      parameters:nil
                                                         success:^(RKObjectRequestOperation *operation, RKMappingResult *mappingResult) {

                                                         } failure:^(RKObjectRequestOperation *operation, NSError *error) {

                                                         }];

1. 问题和疑问

一个。 getObjectsAtPathForRelationship具有正确创建到Place实体的位置，但收藏夹＆gt;地方关系没有联系。

湾将placeIds放入Favorite实体的目的是什么？我已经看到关于外键映射的SO问题/响应，说明这是实现它的方法。有人可以解释为什么吗？