could not locate an NSManagedObjectModel for entity name

Question

This is the code for toggleAddProject method, the Core Data code is almost the same as found in Apple\'s CoreDataBooks sample, however when I click the add button the app cr

Answer 1

Ok I ran across this issue as well and I solved it thusly. The original code was given as:

Event *event = (Event *)[NSEntityDescription insertNewObjectForEntityForName:@"Event" inManagedObjectContext:managedObjectContext];

While the code is concise it seems like the debugger can't display more detailed information about where the error is since you are both creating and configuring a new instance of the 'Event' entity (or whatever your Entity is named).

Instead I broke out this into three lines and the debugger displayed a lot more information:

Event *event = [[NSManagedObject alloc] init];
NSManagedObjectContext *moc = [self managedObjectContext];
event = [NSEntityDescription insertNewObjectForEntityForName:@"Event" inManagedObjectContext:moc];

I found I had not set the correct Type for one of the attributes and I had a typo in my code, all of which the debugger pointed out.