RestKit 映射无效参数不满足：managedObjectStore

Posted 2023-03-13

【中文标题】RestKit 映射无效参数不满足：managedObjectStore

【英文标题】：RestKit Mapping Invalid parameter not satisfying: managedObjectStore

【发布时间】：2014-05-05 05:07:41

【问题描述】：

可能重复：RestKit Core Data 'managedObjectStore is nil'

谁能解释一下为什么当我运行我的应用程序时会出现如下错误：

由于未捕获的异常“NSInternalInconsistencyException”而终止应用程序，原因：“无效参数不满足：managedObjectStore” *** 首先抛出调用堆栈

当我调用以下方法时，它只发生在我的 MainViewController 中：

-(void)loadLocationsOfWearers
RKManagedObjectStore *store = [[DateModel sharedDataModel] objectStore];

NSIndexSet *statusCodeSet= RKStatusCodeIndexSetForClass(RKStatusCodeClassSuccessful);
RKMapping *mapping = [MappingProvider watchesMapping];

RKResponseDescriptor *responseDescriptor = [RKResponseDescriptor responseDescriptorWithMapping:mapping method:RKRequestMethodAny pathPattern:nil keyPath:@"watch" statusCodes:statusCodeSet];

NSURL *url = [NSURL URLWithString:kSERVER_ADDR];
NSURLRequest *request = [NSURLRequest requestWithURL:url];

RKManagedObjectRequestOperation *operation =[[RKManagedObjectRequestOperation alloc] initWithRequest:request responseDescriptors:@[responseDescriptor]];

operation.managedObjectCache = store.managedObjectCache;
operation.managedObjectContext = store.mainQueueManagedObjectContext;

[operation setCompletionBlockWithSuccess:^(RKObjectRequestOperation *operation, RKMappingResult *mappingResult) 
    _wearerList = mappingResult.array;

    NSLog(@"Results:\n %@",mappingResult.dictionary);


failure:^(RKObjectRequestOperation *operation, NSError *error) 
    NSLog(@"ERROR: %@", error);
    NSLog(@"Response: %@", operation.HTTPRequestOperation.responseString);
];

[operation start];

当我在其他 ViewController 中调用此方法时，一切正常。 看起来我的 managedObjectStore 为零，但我不知道这是什么原因...... 请查看我的 DateModel 代码并与我分享您的想法：

@implementation DateModel
+ (id)sharedDataModel 

static DateModel *__sharedDataModel = nil;
static dispatch_once_t onceToken;
dispatch_once(&onceToken, ^
    __sharedDataModel = [[DateModel alloc] init];
);

return __sharedDataModel;

- (NSManagedObjectModel *)managedObjectModel 

return [NSManagedObjectModel mergedModelFromBundles:nil];

- (id)optionsForSqliteStore 

return @
         NSInferMappingModelAutomaticallyOption: @YES,
         NSMigratePersistentStoresAutomaticallyOption: @YES
         ;

- (void)setup 

self.objectStore = [[RKManagedObjectStore alloc] initWithManagedObjectModel:[self managedObjectModel]];

NSString *path = [RKApplicationDataDirectory() stringByAppendingPathComponent:@"Data.sqlite"];
NSLog(@"Setting up store at %@", path);
NSError *error;

[self.objectStore addSQLitePersistentStoreAtPath:path
                          fromSeedDatabaseAtPath:nil
                               withConfiguration:nil
                                         options:[self optionsForSqliteStore]
                                           error:&error];

[self.objectStore createManagedObjectContexts];


self.objectStore.managedObjectCache =[[RKInMemoryManagedObjectCache alloc]initWithManagedObjectContext:self.objectStore.persistentStoreManagedObjectContext];


[RKManagedObjectStore setDefaultStore:self.objectStore];

在我的 AppDelegate 方法中，我只是简单地设置了我的商店。

-(void)setupCoreData

[[DateModel sharedDataModel]setup];


- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions

[self setupCoreData];

当我运行我的应用程序时，出现如下屏幕所示的错误：

+(RKMapping *)watchesMapping

RKEntityMapping *mapping = [RKEntityMapping mappingForEntityForName:@"Watches" inManagedObjectStore:[[DateModel sharedDataModel]objectStore]];
[mapping addAttributeMappingsFromDictionary:@
                                              @"id": @"watch_id",
                                              @"altitude":@"altitude",
                                              @"battery_life":@"battery_life",
                                              @"button_press_time":@"button_press_time",
                                              @"charging_status":@"charging_status",
                                              @"gmaps":@"gmaps",
                                              @"id_addr":@"id_addr",
                                              @"last_keep_alive":@"last_keep_alive",
                                              @"last_update_time":@"last_update_time",
                                              @"latitude":@"latitude",
                                              @"longitude":@"longitude",
                                              @"location":@"location",
                                              @"network":@"network",
                                              @"phonewatchno":@"phonewatchno",
                                              @"rssi":@"rssi",
                                              @"short_imei":@"short_imei",
                                              @"updated_at":@"updated_at",
                                              @"voltage":@"voltage",
                                              @"waerer_id":@"wearer_id",
                                              @"updated_at":@"updated_at",
                                              @"token":@"token"


                                              
];
[mapping addPropertyMapping:[RKRelationshipMapping relationshipMappingFromKeyPath:@"alerts" toKeyPath:@"alerts" withMapping:[MappingProvider alertsMapping]]];
return mapping;

【问题讨论】：

显示MappingProvider watchesMapping的代码

感谢您抽出宝贵时间更新我的问题

【参考方案1】：

loadLocationsOfWearers 被调用太快（在setupCoreData 被调用之前）。稍后调用，或在创建数据模型单例时调用setupCoreData。

【讨论】：

NSEntityDescription *destinationEntity = [relationshipDescription destinationEntity];

在我的单例中调用 setupCoreData 时，我收到 badAccess 错误，并且我的应用程序正在停止调试此行： NSEntityDescription *destinationEntity = [relationshipDescription destinationEntity]; loadLocationsOfWearers 方法在 viewDidLoad 方法中被调用，所以我和它只是在那里调用的一种方法。任何其他想法如何解决它？

异常名称和消息是什么？改变做事的顺序才是正确的解决方案

代码中有恶臭是我的错。我在其他方法中有 dispatch_asynch 块，这是此错误的主要原因。谢谢你的帮助，我真的很感激。干杯