Restkit 将数组映射到核心数据

Question

我有以下 JSON:

{
    "id": 1,
    "editable": true,
    "number": "1",
    "name": "Text here",
    "banner": "Text here",
    "address": "Text here",
    "city": "Text here",
    "contact": "Text here",
    "latitude": "Text here",
    "longitude": "Text here",
    "banner_id": 5,
    "hours": [
        {
            "day": "monday",
            "start": "8:00am",
            "end": "5:00pm"
        },
        {
            "day": "tuesday",
            "start": "",
            "end": ""
        },
        {
            "day": "wednesday",
            "start": "",
            "end": ""
        },
        {
            "day": "thursday",
            "start": "",
            "end": ""
        },
        {
            "day": "friday",
            "start": "",
            "end": ""
        },
        {
            "day": "saturday",
            "start": "",
            "end": ""
        },
        {
            "day": "sunday",
            "start": "",
            "end": ""
        }
    ]
}

我正在尝试创建包含小时数组的此对象的映射，我的代码如下：

RKObjectMapping* hoursMapping = [RKObjectMapping mappingForClass:[Hours class] ];
    [hoursMapping addAttributeMappingsFromArray:@[ @"day", @"start", @"end"]];

    RKObjectMapping* storeMapping = [RKObjectMapping mappingForClass:[Store class] ];
    [storeMapping addAttributeMappingsFromArray:@[ @"id", @"editable", @"number", @"name", @"banner", @"address", @"city", @"contact", @"latitude", @"longitude", @"banner_id"]];

    [storeMapping addPropertyMapping:[RKRelationshipMapping relationshipMappingFromKeyPath:@"hours"
                                                                               toKeyPath:@"hours"
                                                                             withMapping:hoursMapping]];

    RKResponseDescriptor *storeResponseDescriptor = [RKResponseDescriptor responseDescriptorWithMapping:storeMapping
                                                                                        method:RKRequestMethodAny
                                                                                   pathPattern:@"api/v2/stores.json"
                                                                                       keyPath:@""
                                                                                   statusCodes:RKStatusCodeIndexSetForClass(RKStatusCodeClassSuccessful)];

映射失败，返回的唯一错误是： "The operation couldn't be completed"

我在这里做错了什么？我怎样才能让它映射成功？

Store.h

@interface Store : NSManagedObject

@property (nonatomic, retain) NSNumber * id;
@property (nonatomic, retain) NSNumber * editable;
@property (nonatomic, retain) NSString * number;
@property (nonatomic, retain) NSString * name;
@property (nonatomic, retain) NSString * banner;
@property (nonatomic, retain) NSNumber * address;
@property (nonatomic, retain) NSString * city;
@property (nonatomic, retain) NSString * contact;
@property (nonatomic, retain) NSString * latitude;
@property (nonatomic, retain) NSString * longitude;
@property (nonatomic, retain) NSNumber * banner_id;
@property (nonatomic, retain) NSSet *hours;
@end

@interface Store (CoreDataGeneratedAccessors)

- (void)addHoursObject:(Hours *)value;
- (void)removeHoursObject:(Hours *)value;
- (void)addHours:(NSSet *)values;
- (void)removeHours:(NSSet *)values;

@end

Hours.h

@interface Hours : NSManagedObject

@property (nonatomic, retain) NSString * day;
@property (nonatomic, retain) NSString * start;
@property (nonatomic, retain) NSString * end;

@end

Answer 1

对于任何试图找到此问题的解决方案的人：

问题是我正在使用带有核心数据的对象映射。我将所有对对象映射的引用更改为实体映射。关系映射是相同的，但现在指向核心数据实体而不是 class。现在一切正常。

RKEntityMapping *storeMapping = [RKEntityMapping mappingForEntityForName:@"Store" inManagedObjectStore:managedObjectStore];
    storeMapping.identificationAttributes = @[@"id"];
    [storeMapping addAttributeMappingsFromArray:@[ @"id", @"editable", @"number", @"name", @"banner", @"address", @"city", @"contact", @"latitude", @"longitude", @"banner_id"]];

    RKEntityMapping *hoursMapping = [RKEntityMapping mappingForEntityForName:@"Hours" inManagedObjectStore:managedObjectStore];
    [hoursMapping addAttributeMappingsFromArray:@[@"day", @"start", @"end"]];
    [storeMapping addPropertyMapping:[RKRelationshipMapping relationshipMappingFromKeyPath:@"hours" toKeyPath:@"hours" withMapping:hoursMapping]];

    RKResponseDescriptor *storeResponseDescriptor = [RKResponseDescriptor responseDescriptorWithMapping:storeMapping
                                                                                            method:RKRequestMethodAny
                                                                                       pathPattern:@"/api/v2/stores.json"
                                                                                           keyPath:@""
                                                                                       statusCodes:RKStatusCodeIndexSetForClass(RKStatusCodeClassSuccessful)];


    [objectManager addResponseDescriptor:storeResponseDescriptor];

欲了解更多信息，请访问：https://medium.com/ios-os-x-development/restkit-tutorial-how-to-fetch-data-from-an-api-into-core-data-9326af750e10

Restkit 将数组映射到核心数据

Restkit mapping arrays to core data

ios

objective-c

restkit-0.20