Update iOS app with updated core data model

Question

I'm almost finished with my 1.1 release of my first iOS app, in it I have made two small changes to my core data model. More specific, I have added two attributes to one of my tables. This is my first core data app and therefore my first core data update to a live app, and I'm a bit nerveous about shipping code that might not work for my current users. Since it's a small update I'm guessing that Apples automatic migration method will do, but I don't want to guess.

The relevant code looks like this:

NSError *error = nil;
__persistentStoreCoordinator = [[NSPersistentStoreCoordinator alloc] initWithManagedObjectModel:[self managedObjectModel]];
NSDictionary *options = [NSDictionary dictionaryWithObjectsAndKeys:
                        [NSNumber numberWithBool:YES],   NSMigratePersistentStoresAutomaticallyOption,
                        [NSNumber numberWithBool:YES],  NSInferMappingModelAutomaticallyOption, nil];
if (![__persistentStoreCoordinator addPersistentStoreWithType:NSSQLiteStoreType configuration:nil URL:storeURL options:options error:&error])
{

    //NSLog(@"Unresolved error %@, %@", error, [error userInfo]);
    abort();
}    

In 1.1 I've added NSDictionary *options.

In my view controller I make sure the the needed rows isn't nil like this:

if (currentPage.inputType == @"drawing") {
    [pageView changeToDrawing];
} else if (currentPage.inputType == @"text") {
    [pageView changeToText];
} else {
    currentPage.inputType = @"text";
    [pageView changeToDrawing];
}

Basically, is these changes enough or do I have to do something else?

Answer 1

Here is a very helpful article with regard to Core Data versioning that answers your question.

To sum it up in a few words, you will need to add a new model version to your project. This is necessary for the migration process.

Edit

Link above has changed and will redirect you to the following link: Core Data Model Versioning and Data Migration

If all else fails, google: Core Data Model Versioning and Data Migration apple developer.