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我无法使用 RestKit 将我的 JSON 映射到核心数据。RK 记录说：

Did not find mappable relationship value keyPath.

我显然做错了什么。

日志：

2012-11-20 15:40:36.525 eMobile[44849:12603] T restkit.object_mapping:RKObjectMappingOperation.m:342 Mapping attribute value keyPath 'OBJECTCLASS' to 'type'
2012-11-20 15:40:36.525 eMobile[44849:12603] T restkit.object_mapping:RKObjectMappingOperation.m:359 Skipped mapping of attribute value from keyPath 'OBJECTCLASS to keyPath 'type' -- value is unchanged (SFAACCOUNT)
2012-11-20 15:40:36.525 eMobile[44849:12603] T restkit.object_mapping:RKObjectMappingOperation.m:342 Mapping attribute value keyPath 'TIMESTAMP' to 'timestamp'
2012-11-20 15:40:36.526 eMobile[44849:12603] T restkit.object_mapping:RKObjectMappingOperation.m:352 Mapped attribute value from keyPath 'TIMESTAMP' to 'timestamp'. Value: 2012-11-20T15:40:08Z
2012-11-20 15:40:36.526 eMobile[44849:12603] D restkit.object_mapping:RKObjectMappingOperation.m:483 Did not find mappable relationship value keyPath 'VALUES'
2012-11-20 15:40:36.526 eMobile[44849:12603] D restkit.object_mapping:RKObjectMappingOperation.m:662 Finished mapping operation successfully...
2012-11-20 15:40:36.526 eMobile[44849:12603] T restkit.object_mapping:RKObjectMapper.m:293 Examining keyPath 'VALUES' for mappable content...
2012-11-20 15:40:36.527 eMobile[44849:12603] D restkit.object_mapping:RKObjectMapper.m:303 Found unmappable value at keyPath: VALUES
2012-11-20 15:40:36.527 eMobile[44849:12603] D restkit.object_mapping:RKObjectMapper.m:367 The following operations are in the queue: (
)
2012-11-20 15:40:36.527 eMobile[44849:12603] D restkit.object_mapping:RKObjectMapper.m:382 Finished performing object mapping. Results: {
    JSONDATA =     (
        "<EntityClass: 0x127da9e0> (entity: EntityClass; id: 0x127527d0 <x-coredata://E20EA003-1D5A-4B27-92DF-DFD8BE7074CB/EntityClass/p2> ; data: {\n    timestamp = \"2012-11-20T15:40:08Z\";\n    type = VCFUND;\n    values = \"<relationship fault: 0x12703200 'values'>\";\n})",
        "<EntityClass: 0x127da6b0> (entity: EntityClass; id: 0x12695dc0 <x-coredata://E20EA003-1D5A-4B27-92DF-DFD8BE7074CB/EntityClass/p1> ; data: {\n    timestamp = \"2012-11-20T15:40:08Z\";\n    type = SFAACCOUNT;\n    values = \"<relationship fault: 0x11efb910 'values'>\";\n})"
    );
}
2012-11-20 15:40:36.530 eMobile[44849:11603] (
    "<EntityClass: 0x126b7400> (entity: EntityClass; id: 0x127527d0 <x-coredata://E20EA003-1D5A-4B27-92DF-DFD8BE7074CB/EntityClass/p2> ; data: <fault>)",
    "<EntityClass: 0x127de030> (entity: EntityClass; id: 0x12695dc0 <x-coredata://E20EA003-1D5A-4B27-92DF-DFD8BE7074CB/EntityClass/p1> ; data: <fault>)"
)

JSON 示例：

{
   "JSONDATA": [
       {
           "OBJECTCLASS": "VCFUND",
           "DESCRIPTION": {
               "VALUES": [
                   {
                       "DATA": [
                           {
                               "NAME": "Fund 1",
                               "VALUE": "Buyout Fund 1"
                           },
                           {
                               "NAME": "Fund 2",
                               "VALUE": "Buyout Fund 2"
                           },
                           {
                               "NAME": "Fund 3",
                               "VALUE": "Buyout Fund 3"
                           }
                       ],
                       "IQID": "059386B4D26249358C68E978D3C10C84"
                   }
               ]
           },
           "TIMESTAMP": "2012-11-17T22:03:55Z"
       },
       {
           "OBJECTCLASS": "PROPERTIES",
           "DESCRIPTION": {
               "VALUES": [
                   {
                       "DATA": [
                           {
                               "NAME": "Property 1",
                               "VALUE": "Buyout Property 1"
                           },
                           {
                               "NAME": "Property 2",
                               "VALUE": "Buyout Property 2"
                           },
                           {
                               "NAME": "Property 3",
                               "VALUE": "Buyout Property 3"
                           }
                       ],
                       "IQID": "456789087654678909876589098"
                   }
               ]
           },
           "TIMESTAMP": "2012-11-17T22:03:55Z"
       }
   ]
}

这是我的映射：

objectManager.objectStore = [RKManagedObjectStore objectStoreWithStoreFilename:@"AppCD.sqlite"];

RKManagedObjectMapping* entityClassItemValueMapping = [RKManagedObjectMapping mappingForClass:[EntityClassItemValue class] inManagedObjectStore:[[RKObjectManager sharedManager] objectStore]];
entityClassItemValueMapping.primaryKeyAttribute = @"name";
[entityClassItemValueMapping mapKeyPath:@"NAME" toAttribute:@"name"];
[entityClassItemValueMapping mapKeyPath:@"VALUE" toAttribute:@"value"];

RKManagedObjectMapping* entityClassItemMapping = [RKManagedObjectMapping mappingForClass:[EntityClassItem class] inManagedObjectStore:[[RKObjectManager sharedManager] objectStore]];
entityClassItemMapping.primaryKeyAttribute = @"iqid";
[entityClassItemMapping mapKeyPath:@"IQID" toAttribute:@"iqid"];

RKManagedObjectMapping* entityClassMapping = [RKManagedObjectMapping mappingForClass:[EntityClass class] inManagedObjectStore:[[RKObjectManager sharedManager] objectStore]];
entityClassMapping.primaryKeyAttribute = @"type";
[entityClassMapping mapKeyPath:@"OBJECTCLASS" toAttribute:@"type"];
[entityClassMapping mapKeyPath:@"TIMESTAMP" toAttribute:@"timestamp"];

[entityClassMapping mapKeyPath:@"VALUES" toRelationship:@"values" withMapping:entityClassItemMapping];
[entityClassItemMapping mapKeyPath:@"DATA" toRelationship:@"entityClassItemValues" withMapping:entityClassItemValueMapping];

[[RKObjectManager sharedManager].mappingProvider setMapping:entityClassMapping forKeyPath:@"JSONDATA"];
[[RKObjectManager sharedManager].mappingProvider setMapping:entityClassItemMapping forKeyPath:@"VALUES"];
[[RKObjectManager sharedManager].mappingProvider setMapping:entityClassItemValueMapping forKeyPath:@"DATA"];

[[objectManager client] setValue:[cookies objectForKey:@"Cookie"] forHTTPHeaderField:@"Cookie"];
NSDictionary *params = [[NSDictionary alloc] initWithObjectsAndKeys:query, @"Targ", @"", @"Query", @"F285E67F2C8CEC9837B68", @"$SESSION", @"3A7037FA806156C4", @"VERSION", nil];
[objectManager loadObjectsAtResourcePath:URL_DATA usingBlock:^(RKObjectLoader *loader) {
    loader.method = RKRequestMethodPOST;
    loader.params = params;
    loader.mappingProvider = [RKObjectManager sharedManager].mappingProvider;
    loader.onDidLoadObjects = loadBlock;
    loader.onDidFailWithError = failBlock;
}];

我的 CoreData 模型是：

#import <Foundation/Foundation.h>
#import <CoreData/CoreData.h>

@class EntityClassItem;

@interface EntityClass : NSManagedObject

@property (nonatomic, retain) NSString * timestamp;
@property (nonatomic, retain) NSString * type;
@property (nonatomic, retain) NSSet *values;
@end

@interface EntityClass (CoreDataGeneratedAccessors)

- (void)addValuesObject:(EntityClassItem *)value;
- (void)removeValuesObject:(EntityClassItem *)value;
- (void)addValues:(NSSet *)values;
- (void)removeValues:(NSSet *)values;

#import <Foundation/Foundation.h>
#import <CoreData/CoreData.h>

@class EntityClassItem;

@interface EntityClass : NSManagedObject

@property (nonatomic, retain) NSString * timestamp;
@property (nonatomic, retain) NSString * type;
@property (nonatomic, retain) NSSet *values;
@end

@interface EntityClass (CoreDataGeneratedAccessors)

- (void)addValuesObject:(EntityClassItem *)value;
- (void)removeValuesObject:(EntityClassItem *)value;
- (void)addValues:(NSSet *)values;
- (void)removeValues:(NSSet *)values;

#import <Foundation/Foundation.h>
#import <CoreData/CoreData.h>

@class EntityClassItem;

@interface EntityClassItemValue : NSManagedObject

@property (nonatomic, retain) NSString * name;
@property (nonatomic, retain) NSString * value;
@property (nonatomic, retain) EntityClassItem *entityClassItem;
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1 回答 1

1

经过大量调试和重新阅读文档后，我想通了。我对周围缺乏了解：

mapKeyPath:@"foo" toRelationship:@"bar" withMapping:fooBar];

正如文档明确指出的那样，mapKeyPath 必须与您要映射到的对象的属性以及 JSON 有效负载中的节点相匹配。我的有效载荷的情况不匹配，所以它失败了。

于 2012-11-21T15:53:50.580 回答