objective-c - RestKit：映射复杂嵌套的问题，需要 forceCollectionMapping 的多个级别

Question

我正在尝试使用 RestKit 映射一些 JSON 数据，但到目前为止一直无法正确完成。数据是一组分层的天数和注册。它看起来如下（我不可能更改它）：

{
  "days": 
  {
    "2012-10-29": {
        "2106303": {
            "activityCode": "LU",
            "approved": false,
            "hours": 0.5,
            "description": "some description",
        },
        "2106304": {
            "activityCode": "VF",
            "approved": false,
            "hours": 7.5,
            "description": "some other description",
        }
        },
        "2012-10-30": null,
  }
}

我的代码如下所示：

- (void)setupWeekMappingForManager:(RKObjectManager *)manager
{
    RKObjectMapping *registrationMapping = [RKObjectMapping mappingForClass:[Registration class]];
    registrationMapping.forceCollectionMapping = YES;
    [registrationMapping mapKeyOfNestedDictionaryToAttribute:@"registrationNumber"];

    RKObjectMapping *dayMapping = [RKObjectMapping mappingForClass:[Day class]];
    dayMapping.forceCollectionMapping = YES;
    [dayMapping mapKeyOfNestedDictionaryToAttribute:@"date"];

    // how can this relationship be mapped?
    [dayMapping mapKeyPath:@"(date)." toRelationship:@"registrations" withMapping:registrationMapping]; 

    [manager.mappingProvider setMapping:dayMapping forKeyPath:@"days"];
}

它愉快地返回了日子，但我找不到映射两种类型之间关系的好方法，

任何朝着正确方向的推动将不胜感激，

最好的问候，汤米

Answer 1

这对我有用：

- (void)setupWeekMappingForManager:(RKObjectManager *)manager
{
    RKObjectMapping *registrationMapping = [RKObjectMapping mappingForClass:[Registration class]];
    registrationMapping.forceCollectionMapping = YES;
    [registrationMapping mapKeyOfNestedDictionaryToAttribute:@"registrationNumber"];
    [registrationMapping mapKeyPath:@"(registrationNumber).description" toAttribute:@"description"];

    RKObjectMapping *dayMapping = [RKObjectMapping mappingForClass:[Day class]];
    dayMapping.forceCollectionMapping = YES;
    [dayMapping mapKeyOfNestedDictionaryToAttribute:@"date"];
    [dayMapping mapKeyPath:@"(date)" toRelationship:@"registrations" withMapping:registrationMapping];

    [manager.mappingProvider setMapping:dayMapping forKeyPath:@"days"];
}

这给了我一个日对象，其中包含一个很好的小时注册数组作为 NSArray。作为参考，它看起来像这样：

@interface Day : NSObject
@property (nonatomic, readonly, copy) NSDate *date;
@property (nonatomic, readonly, strong) NSMutableArray *registrations;
@end