NSFetchedResultsController for new object - objective-c

Question

I have UITableViewController with static editable cells. In my UITableViewController I make CoreData object, like this:
- (User*)user {
if (_user == nil) {
_user = [NSEntityDescription insertNewObjectForEntityForName:TABLE_USER inManagedObjectContext:self.managedObjectContext];
NSError* error;
[self.managedObjectContext save:&error];
if (error != nil) {
abort();
}
}
return _user;
}
I want to get the object in NSFetchedResultsController that would display its fields in a table, and then save the object.
I'm trying to do:
- (NSFetchedResultsController *)fetchedResultsController
{
if (_fetchedResultsController != nil) {
return _fetchedResultsController;
}
NSFetchRequest *fetchRequest = [[NSFetchRequest alloc] init];
// Edit the entity name as appropriate.
NSEntityDescription *entity = [NSEntityDescription entityForName:TABLE_USER_PROFILE inManagedObjectContext:self.managedObjectContext];
[fetchRequest setEntity:entity];
// Set the batch size to a suitable number.
[fetchRequest setFetchBatchSize:20];
NSSortDescriptor *sortDescriptor = [[NSSortDescriptor alloc] initWithKey:#"lastName" ascending:NO];
NSArray *sortDescriptors = #[sortDescriptor];
NSPredicate* pred = [NSPredicate predicateWithFormat:#"%# = %#", TABLE_USER, self.user];
[fetchRequest setPredicate:pred];
[fetchRequest setSortDescriptors:sortDescriptors];
NSFetchedResultsController *aFetchedResultsController = [[NSFetchedResultsController alloc] initWithFetchRequest:fetchRequest managedObjectContext:self.managedObjectContext sectionNameKeyPath:nil cacheName:TABLE_USER];
aFetchedResultsController.delegate = self;
self.fetchedResultsController = aFetchedResultsController;
NSError *error = nil;
if (![self.fetchedResultsController performFetch:&error]) {
abort();
}
return _fetchedResultsController;
}
But it didn't work. I get empty fetchedResultsController.

Answer 1

If self.user is a NSManagedObject and you query against a User entity you could try to edit your predicate like the following:
NSPredicate* pred = [NSPredicate predicateWithFormat:#"self == %#", self.user];
Hope that helps.
P.S. If my answer doesn't work try to provide some other details (see my comment)