Edit Question - KnowledgeHub

Title Body

My old core data model has an NSDate field, which I would like to change to a NSNumber . I read the Apple documentation and several similar questions on SO and other blogs (see references at end of question) But no matter what I do, I keep getting the same error: Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: 'Mismatch between mapping and source/destination models' I only have 2 versions of the model, and I have verified time and again that the source and destination models are correct. I even discarded all my changes and recreated a new model, mappings and entities ( NSManagedObject subclasses). I've been stuck on this for almost 2 days now, and have no clue anymore as to what I'm doing. Any pointers on what I'm doing wrong will be greatly appreciated. - (NSPersistentStoreCoordinator *)persistentStoreCoordinator { if (_persistentStoreCoordinator != nil) { return _persistentStoreCoordinator; } NSURL *storeURL = [[self applicationDocumentsDirectory] URLByAppendingPathComponent:@"Old.sqlite"]; NSError *error = nil; _persistentStoreCoordinator = [[NSPersistentStoreCoordinator alloc] initWithManagedObjectModel:[self managedObjectModel]]; NSString *sourceStoreType = NSSQLiteStoreType; NSURL *sourceStoreURL = storeURL; NSURL *destinationStoreURL = [[self applicationDocumentsDirectory] URLByAppendingPathComponent:@"New.sqlite"]; NSString *destinationStoreType = NSSQLiteStoreType; NSDictionary *destinationStoreOptions = nil; NSDictionary *sourceMetadata = [NSPersistentStoreCoordinator metadataForPersistentStoreOfType:sourceStoreType URL:sourceStoreURL error:&error]; if (sourceMetadata == nil) { NSLog(@"source metadata is nil");

Tags (comma-separated) Cancel