Databases
StackOverflow2013
Postsdbo
POCore-Data iPhone: could not locate an NSManagedObjectModel
 

Note that there are some explanatory texts on larger screens.

plurals
  1. POCore-Data iPhone: could not locate an NSManagedObjectModel
    primarykey
    data
    text
    <p>I am using Apple's CoreDataBooks sample project as a learning aid for core data. </p> <p>I modified the app so that when the app loads I show a menu page first - not the Books tableview (RootViewController).</p> <p>I have done the following:</p> <p>I created a menu page in interface builder (just a view with a button on it)</p> <p>The CoreDataBooksAppDelegate.h now looks like this:</p> <pre><code>// for the menu @class MenuViewController; @interface CoreDataBooksAppDelegate : NSObject &lt;UIApplicationDelegate&gt; { NSManagedObjectModel *managedObjectModel; NSManagedObjectContext *managedObjectContext; NSPersistentStoreCoordinator *persistentStoreCoordinator; UIWindow *window; UINavigationController *navigationController; //for the menu MenuViewController *viewController; } - (IBAction)saveAction:sender; //for the menu @property (nonatomic, retain) IBOutlet MenuViewController *viewController; @property (nonatomic, retain, readonly) NSManagedObjectModel *managedObjectModel; @property (nonatomic, retain, readonly) NSManagedObjectContext *managedObjectContext; @property (nonatomic, retain, readonly) NSPersistentStoreCoordinator *persistentStoreCoordinator; @property (nonatomic, readonly) NSString *applicationDocumentsDirectory; @property (nonatomic, retain) IBOutlet UIWindow *window; @property (nonatomic, retain) IBOutlet UINavigationController *navigationController; @end </code></pre> <p>The CoreDataBooksAppDelegate.m looks like this:</p> <pre><code>#import "CoreDataBooksAppDelegate.h" #import "RootViewController.h" // for the menu #import "MenuViewController.h" @implementation CoreDataBooksAppDelegate @synthesize window; @synthesize navigationController; // for the menu @synthesize viewController; #pragma mark - #pragma mark Application lifecycle - (void)applicationDidFinishLaunching:(UIApplication *)application { RootViewController *rootViewController = (RootViewController *)[navigationController topViewController]; rootViewController.managedObjectContext = self.managedObjectContext; // for the menu [window addSubview:viewController.view]; // Configure and show the window [window makeKeyAndVisible]; } </code></pre> <p>The rest of CoreDataAppDelegete.m remains unchanged.</p> <p>In the MenuViewController when the button is clicked, the following action takes place:</p> <pre><code>RootViewController *modalViewController1 = [[[RootViewController alloc] initWithNibName:nil bundle:nil] autorelease]; [self presentModalViewController:modalViewController1 animated:YES]; </code></pre> <p>In IB I changed the MainWindow.xib to call the MenuViewController rather than the RootViewController.</p> <p>So, the app loads and the menu is displayed properly with the button. Upon clicking the button the application crashes inside of the RootViewController's viewDidLoad.</p> <p>It crashes right here:</p> <pre><code>- (void)viewDidLoad { [super viewDidLoad]; NSLog(@"1 START viewDidLoad RootViewController"); self.title = @"Books"; // Set up the edit and add buttons. self.navigationItem.leftBarButtonItem = self.editButtonItem; NSLog(@"2 setup button viewDidLoad RootViewController"); // Configure the add button. UIBarButtonItem *addButton = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemAdd target:self action:@selector(addBook)]; self.navigationItem.rightBarButtonItem = addButton; [addButton release]; NSLog(@"3 viewDidLoad RootViewController"); NSError *error; // HERE IS THE CRASH SITE if (![[self fetchedResultsController] performFetch:&amp;error]) { NSLog(@"Does not reach this point in viewDidLoad RootViewController"); // Update to handle the error appropriately. NSLog(@"Unresolved error %@, %@", error, [error userInfo]); abort(); // Fail } NSLog(@"END viewDidLoad RootViewController"); } </code></pre> <p>In the console I receive the following:</p> <pre><code>Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: '+entityForName: could not locate an NSManagedObjectModel for entity name 'Book'' </code></pre> <p>I have read about this exception but I do not know the proper steps to resolve it.</p>
    singulars
    1. PO
      singulars
      1. PTAnswer
    1. This table or related slice is empty.
    1. PTQuestion
    1. This table or related slice is empty.
    1. USCraigH
    plurals
    1. PL
      singulars
      1. LTLinked
    1. PL
      singulars
      1. LTLinked
    2. PL
      singulars
      1. LTLinked
    3. PL
      singulars
      1. LTDuplicate
    1. This table or related slice is empty.
    1. PO
      singulars
      1. PTAnswer
    2. PO
      singulars
      1. PTAnswer
    3. PO
      singulars
      1. PTAnswer
    1. VO
      singulars
      1. POCore-Data iPhone: could not locate an NSManagedObjectModel
      1. This table or related slice is empty.
      1. VTUpMod
    2. VO
      singulars
      1. POCore-Data iPhone: could not locate an NSManagedObjectModel
      1. USbiscuitstack
      1. VTFavorite
    3. VO
      singulars
      1. POCore-Data iPhone: could not locate an NSManagedObjectModel
      1. This table or related slice is empty.
      1. VTUpMod
    1. This table or related slice is empty.
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload