setupFetchedResultsControllerForEntity

-(BOOL) setupFetchedResultsControllerForEntity:(NSString *)argEntityName withSortKey:(NSString *)argSortKey
{
    // Uncomment the following line to display an Edit button in the navigation bar for this view controller.
    // self.navigationItem.rightBarButtonItem = self.editButtonItem;
    
    NSFetchRequest *fetchRequest = [[NSFetchRequest alloc] init];
    
    // Configure the request's entity, and optionally its predicate.
    NSEntityDescription *entityDescription = [NSEntityDescription entityForName:argEntityName inManagedObjectContext:self.managedObjectContext];
    [fetchRequest setEntity:entityDescription];
    
    NSSortDescriptor *sortDescriptor = [[NSSortDescriptor alloc] initWithKey:argSortKey ascending:NO];
    NSArray *sortDescriptors = [[NSArray alloc] initWithObjects:sortDescriptor, nil];
    [fetchRequest setSortDescriptors:sortDescriptors];
    [sortDescriptors release];
    [sortDescriptor release];
    
    self.fetchedResultsController = [[NSFetchedResultsController alloc]
                                     initWithFetchRequest:fetchRequest
                                     managedObjectContext:self.managedObjectContext
                                     sectionNameKeyPath:nil
                                     cacheName:nil];
    [self.fetchedResultsController setDelegate:self];
    
    [fetchRequest release];
    
    NSError *error;
    BOOL success = [self.fetchedResultsController performFetch:&error];
    
    if (success) {
        T_DBG(@"fetch succeeded.");
        return YES;
    }
    else {
        T_DBG(@"fetch failed");
        return NO;
    }
}