Week4:'NSInvalidArgumentException', reason: '+entityForName: nil is not a legal

Hi All,

I had got the following error

‘NSInvalidArgumentException’, reason: ‘+entityForName: nil is not a legal NSManagedObjectContext parameter searching for entity name ‘TODOEntity’’

Please provide some input on this

Got the exact same problem, ‘NSInvalidArgumentException’, reason: ‘+entityForName: nil is not a legal NSManagedObjectContext parameter searching for entity name ‘ToDoEntity’’

Anyone?

Hi

In your AppDelegate.m file check for below lines of the code are present. If not copy the below lines of the code with few modifications in bold text in code replace with your app name. It worked for me.

#pragma mark - Core Data stack
@synthesize managedObjectContext = _managedObjectContext;
@synthesize managedObjectModel = _managedObjectModel;
@synthesize persistentStoreCoordinator = _persistentStoreCoordinator;

  • (NSURL *)applicationDocumentsDirectory {
    // The directory the application uses to store the Core Data store file. This code uses a directory named “com.BuildACode.TODOManager” in the application’s documents directory.
    return [[[NSFileManager defaultManager] URLsForDirectory:NSDocumentDirectory inDomains:NSUserDomainMask] lastObject];
    }

  • (NSManagedObjectModel *)managedObjectModel {
    // The managed object model for the application. It is a fatal error for the application not to be able to find and load its model.
    if (_managedObjectModel != nil) {
    return _managedObjectModel;
    }
    NSURL *modelURL = [[NSBundle mainBundle] URLForResource:@“TODOEx” withExtension:@“momd”];
    _managedObjectModel = [[NSManagedObjectModel alloc] initWithContentsOfURL:modelURL];
    return _managedObjectModel;
    }

  • (NSPersistentStoreCoordinator *)persistentStoreCoordinator {
    // The persistent store coordinator for the application. This implementation creates and returns a coordinator, having added the store for the application to it.
    if (_persistentStoreCoordinator != nil) {
    return _persistentStoreCoordinator;
    }

    // Create the coordinator and store

    _persistentStoreCoordinator = [[NSPersistentStoreCoordinator alloc] initWithManagedObjectModel:[self managedObjectModel]];
    NSURL *storeURL = [[self applicationDocumentsDirectory] URLByAppendingPathComponent:@“TODOEx.sqlite”];
    NSError *error = nil;
    NSString *failureReason = @“There was an error creating or loading the application’s saved data.”;
    if (![_persistentStoreCoordinator addPersistentStoreWithType:NSSQLiteStoreType configuration:nil URL:storeURL options:nil error:&error]) {
    // Report any error we got.
    NSMutableDictionary *dict = [NSMutableDictionary dictionary];
    dict[NSLocalizedDescriptionKey] = @“Failed to initialize the application’s saved data”;
    dict[NSLocalizedFailureReasonErrorKey] = failureReason;
    dict[NSUnderlyingErrorKey] = error;
    error = [NSError errorWithDomain:@“YOUR_ERROR_DOMAIN” code:9999 userInfo:dict];
    // Replace this with code to handle the error appropriately.
    // abort() causes the application to generate a crash log and terminate. You should not use this function in a shipping application, although it may be useful during development.
    NSLog(@“Unresolved error %@, %@”, error, [error userInfo]);
    abort();
    }

    return _persistentStoreCoordinator;
    }

  • (NSManagedObjectContext *)managedObjectContext {
    // Returns the managed object context for the application (which is already bound to the persistent store coordinator for the application.)
    if (_managedObjectContext != nil) {
    return _managedObjectContext;
    }

    NSPersistentStoreCoordinator *coordinator = [self persistentStoreCoordinator];
    if (!coordinator) {
    return nil;
    }
    _managedObjectContext = [[NSManagedObjectContext alloc] initWithConcurrencyType:NSMainQueueConcurrencyType];
    [_managedObjectContext setPersistentStoreCoordinator:coordinator];
    return _managedObjectContext;
    }

#pragma mark - Core Data Saving support

  • (void)saveContext {
    NSManagedObjectContext *managedObjectContext = self.managedObjectContext;
    if (managedObjectContext != nil) {
    NSError *error = nil;
    if ([managedObjectContext hasChanges] && ![managedObjectContext save:&error]) {
    // Replace this implementation with code to handle the error appropriately.
    // abort() causes the application to generate a crash log and terminate. You should not use this function in a shipping application, although it may be useful during development.
    NSLog(@“Unresolved error %@, %@”, error, [error userInfo]);
    abort();
    }
    }
    }
1 Like

It worked like a charm thanks a lot!

I love you!!! Thank you so much!! After a full day trying out a billion things, i remembered this forum existed.

Your answer saved my life.

1 Like

DID NOT WORK FOR ME! Any other methods to resolve this error?