[NSFetchedResultsController sections] returns nil?
- by Chris
Hi Everyone,
I am trying to resolve this for days at this stage and I'm hoping you can help.
I have two ViewControllers which query two different tables from the same database using Core Data. The first ViewController is opened with the app and displays fine. The second is called from within the first ViewController, using a pretty standard fetch setup:
- (NSFetchedResultsController *)fetchedClients {
// Set up the fetched results controller if needed.
if (fetchedClients == nil) {
// Create the fetch request for the entity.
NSFetchRequest *fetchRequest = [[NSFetchRequest alloc] init];
// Edit the entity name as appropriate.
NSEntityDescription *entity = [NSEntityDescription entityForName:@"Clients"
inManagedObjectContext:managedObjectContext];
[fetchRequest setEntity:entity];
// Edit the sort key as appropriate.
NSSortDescriptor *sortDescriptor = [[NSSortDescriptor alloc] initWithKey:@"clientsName" ascending:YES];
NSArray *sortDescriptors = [[NSArray alloc] initWithObjects:sortDescriptor, nil];
[fetchRequest setSortDescriptors:sortDescriptors];
// Edit the section name key path and cache name if appropriate.
// nil for section name key path means "no sections".
NSFetchedResultsController *aFetchedResultsController = [[NSFetchedResultsController alloc]
initWithFetchRequest:fetchRequest
managedObjectContext:managedObjectContext
sectionNameKeyPath:nil
cacheName:@"Root"];
aFetchedResultsController.delegate = self;
self.fetchedClients = aFetchedResultsController;
[aFetchedResultsController release];
[fetchRequest release];
[sortDescriptor release];
[sortDescriptors release];
}
return fetchedClients;
}
When I call [self.fetchedClients sections], I get a nil (0x0) return.
I have examined the database using an external application to ensure data exists in the "Clients" table.
Can anyone think of a reason why [self.fetchedClients sections] would return nil?
Many thanks for any help you can provide.
Regards,
Chris
