CoreData Question - trying to access data from two tables.

[daviddelmonte]

I've used the CoreDataBooks as a model for this app, and have run into a problem in that that sample uses 1 table and I need to use two. (Verbs and Persons).

Here is part of my code in the rootController.m file:

Code: (Objective-C)

// Create and configure a fetch request with the Verb entity.
	NSFetchRequest *fetchRequestVerb = [[NSFetchRequest alloc] init];
	NSEntityDescription *verbEntity = [NSEntityDescription entityForName:@"Verb" inManagedObjectContext:managedObjectContext];
	[fetchRequestVerb setEntity:verbEntity];
	
	
	// Create the sort descriptors array.
	NSSortDescriptor *nameDescriptor = [[NSSortDescriptor alloc] initWithKey:@"name" ascending:YES];
	NSSortDescriptor *typeDescriptor = [[NSSortDescriptor alloc] initWithKey:@"type" ascending:YES];
	NSSortDescriptor *translationDescriptor = [[NSSortDescriptor alloc] initWithKey:@"translation" ascending:YES];
	
	NSSortDescriptor *presentDescriptor = [[NSSortDescriptor alloc] initWithKey:@"present" ascending:YES];
	NSSortDescriptor *simpPastDescriptor = [[NSSortDescriptor alloc] initWithKey:@"simplePast" ascending:YES];
	NSSortDescriptor *contPastDescriptor = [[NSSortDescriptor alloc] initWithKey:@"contPast" ascending:YES];
	NSSortDescriptor *simpFutureDescriptor = [[NSSortDescriptor alloc] initWithKey:@"simpleFuture" ascending:YES];
	NSSortDescriptor *contFutureDescriptor = [[NSSortDescriptor alloc] initWithKey:@"contFuture" ascending:YES];
	NSSortDescriptor *imperativeDescriptor = [[NSSortDescriptor alloc] initWithKey:@"imperative" ascending:YES];
	
	// RETRIEVE from PERSONS table...
	
	NSSortDescriptor *single1Descriptor = [[NSSortDescriptor alloc] initWithKey:@"single1" ascending:YES];
	NSSortDescriptor *single2Descriptor = [[NSSortDescriptor alloc] initWithKey:@"single2" ascending:YES];
	NSSortDescriptor *single3Descriptor = [[NSSortDescriptor alloc] initWithKey:@"single3" ascending:YES];
	NSSortDescriptor *plural1Descriptor = [[NSSortDescriptor alloc] initWithKey:@"plural1" ascending:YES];
	NSSortDescriptor *plural2Descriptor = [[NSSortDescriptor alloc] initWithKey:@"plural2" ascending:YES];
	NSSortDescriptor *plural3Descriptor = [[NSSortDescriptor alloc] initWithKey:@"plural3" ascending:YES];
	
	NSArray *sortDescriptors = [[NSArray alloc] initWithObjects:
								nameDescriptor, 
								typeDescriptor, 
								translationDescriptor,
								presentDescriptor,
								simpPastDescriptor,
								contPastDescriptor,
								simpFutureDescriptor,
								contFutureDescriptor,
								imperativeDescriptor,
								single1Descriptor,
								single2Descriptor,
								single3Descriptor,
								plural1Descriptor,
								plural2Descriptor,
								plural3Descriptor,
						 
								nil];
	
	[fetchRequestVerb setSortDescriptors:sortDescriptors];
	
	// Create and initialize the fetch results controller.
	NSFetchedResultsController *aFetchedResultsController = [[NSFetchedResultsController alloc] 
		initWithFetchRequest:fetchRequestVerb managedObjectContext:managedObjectContext sectionNameKeyPath:@"name" cacheName:@"Root"];
	self.fetchedResultsController = aFetchedResultsController;
	fetchedResultsController.delegate = self;

and my data model is attached.

Of course, when I try to access the first item from the Persons table, I get an exception.. Should I make an additional viewController? Should I have another fetch routine in the vc that accesses the Persons table? Am I doing the whole thing wrong?

David