使用CoreData时，RestKit无法正确映射属性

Question

我在使用我的应用程序实现RestKit / CoreData时遇到了一些问题。使用RKTwitterCoreData示例应用程序并将其指向我的json feed的Web服务，我得到了生成的tableview：

到目前为止遇到的问题：

1. 刷新生成新的核心数据条目，即使我已将primaryKeyAttribute设置为orderID。
2. cell textLabel显示与我的网络服务
不匹配的奇怪订单ID

这是我的applicationDidFinishLaunchingWithOptions：

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
// Initialize RestKit
RKObjectManager* objectManager = [RKObjectManager managerWithBaseURLString:@"http://mywebservice.com"];

// Enable automatic network activity indicator management
objectManager.client.requestQueue.showsNetworkActivityIndicatorWhenBusy = YES;

NSString *databaseName = @"RKTwitterData.sqlite";
objectManager.objectStore = [RKManagedObjectStore objectStoreWithStoreFilename:databaseName usingSeedDatabaseName:nil managedObjectModel:nil delegate:self];

RKManagedObjectMapping* statusMapping = [RKManagedObjectMapping mappingForClass:[Order class] inManagedObjectStore:objectManager.objectStore];
statusMapping.primaryKeyAttribute = @"orderID";
[statusMapping mapKeyPath:@"id" toAttribute:@"orderID"];
[statusMapping mapAttributes:@"created_at", nil];

// Register our mappings with the provider
[objectManager.mappingProvider setObjectMapping:orderMapping forResourcePathPattern:@"/orders"];

// Create Window and View Controllers
RKTwitterViewController* viewController = [[[RKTwitterViewController alloc] initWithNibName:nil bundle:nil] autorelease];
UINavigationController* controller = [[UINavigationController alloc] initWithRootViewController:viewController];
UIWindow* window = [[UIWindow alloc] initWithFrame:CGRectMake(0, 0, 320, 480)];
[window addSubview:controller.view];
[window makeKeyAndVisible];

return YES;
}

json结果为/ orders：



处理此问题的任何建议？谢谢！

Answer 1

卫生署！原因是因为twitter API不符合键值编码。一旦我改变了：

 [objectManager.mappingProvider setObjectMapping:orderMapping forResourcePathPattern:@"/orders"];

使用：

 [objectManager.mappingProvider setObjectMapping:orderMapping forKeyPath:@"orders"];

又恢复了工作！

谢谢并希望它有所帮助。