Question

所以我遇到了一个非常令人沮丧的问题......我正在使用Restkit从我的Django服务器获取对象，并且映射已成功完成。那样就好！现在，我试图从我的SQLLite数据库中获取该对象并更改该对象并将其保存回来。例如：

    _managedObjectContext = [RKManagedObjectStore defaultStore].mainQueueManagedObjectContext;


    NSFetchRequest *fetchRequest = [NSFetchRequest fetchRequestWithEntityName:@"User"];
    fetchRequest.predicate = [NSPredicate predicateWithFormat: @"identifier == 3"];
    NSSortDescriptor *descriptor = [NSSortDescriptor sortDescriptorWithKey:@"identifier" ascending:NO];
    fetchRequest.sortDescriptors = @[descriptor];
    NSError *error = nil;

    NSFetchedResultsController *fetchedResultsController2 = [[NSFetchedResultsController alloc] initWithFetchRequest:fetchRequest
                                                                        managedObjectContext:_managedObjectContext
                                                                          sectionNameKeyPath:nil
                                                                                   cacheName:nil];
    BOOL fetchSuccessful = [fetchedResultsController2 performFetch:&error];
    if (! fetchSuccessful) {
        NSLog(@"%@", error.description);
    }

    PokaUser* user = [[fetchedResultsController2 fetchedObjects]objectAtIndex:0];
    user.firstName = @"NewFirstName";
    BOOL hasSaved = [user.managedObjectContext save:&error];
    NSLog(@"INFO:{%s} CoreData has Saved: %@ (%d)\nerror:%@ | %@ | %@", __FUNCTION__, (hasSaved) ? @"YES" : @"NO", hasSaved, error, [error userInfo],[error localizedDescription]);

我得到以下日志：

CoreData已保存：是（1）错误：（null）| （null）| （空）

现在，如果我关闭我的应用程序并重新打开它，（或者甚至自己检查Sqllite.db），则不会保存更改。我一直得到第一个名字。

以下是我创建ManagedObjectContext的方法：

[managedObjectStore createPersistentStoreCoordinator];
NSString *storePath = [RKApplicationDataDirectory() stringByAppendingPathComponent:@"Maindb.sqlite"];

NSString *seedPath = [[NSBundle mainBundle] pathForResource:@"Maindb" ofType:@"sqlite"];
NSError *error;
NSPersistentStore *persistentStore = [managedObjectStore addSQLitePersistentStoreAtPath:storePath fromSeedDatabaseAtPath:seedPath withConfiguration:nil options:nil error:&error];
NSAssert(persistentStore, @"Failed to add persistent store with error: %@", error);

有什么想法吗？！

谢谢！

Answer 1

有必要调用托管ObjectStore的savePersistentStore方法：[managedObjectStore.mainQueueManagedObjectContext save：＆amp; error]; [managedObjectStore.mainQueueManagedObjectContext saveToPersistentStore：＆amp; error];

对象不会保存到SQL Lite中，即使它说已保存[RestKit ManagedObjectContext]

1 个答案: