Use data from two (or three) entities in tableview - xcode

Question

I have an app that stores information for golf rounds. I have three Entities that I am persisting data to: Rounds, Courses, and Tees. I structured the schema in this way because there is a two-many relationship between Rounds and Courses, and a Course can have multiple Tees (blue, white, gold, etc.)
I have a UITableview that I would like to display the results of each round in. However, I would like to display data from the Rounds Entity as well as the Courses Entity. Ideally I would also like to display the Tee for that round as well,but it's not a priority.
My question is, how do I use a FetchResultsController to get data from the three entities and display it in a single cell of a UITableview?
Here is how I am saving the data to the Entities:
HandicapAppDelegate *appDelegate = [[UIApplication sharedApplication] delegate];
NSManagedObjectContext* context = [appDelegate managedObjectContext];
NSEntityDescription *roundsEntity = [NSEntityDescription entityForName:#"Rounds" inManagedObjectContext:context];
NSFetchRequest *request =[[NSFetchRequest alloc]init];
[request setEntity:roundsEntity];
Rounds * rounds = [NSEntityDescription insertNewObjectForEntityForName:#"Rounds" inManagedObjectContext:context];
[rounds setValue:score forKey:#"roundScore"];
[rounds setValue:date forKey:#"roundDate"];
[rounds setValue:differential forKey:#"roundDifferential"];
Courses * courses = [NSEntityDescription insertNewObjectForEntityForName:#"Courses" inManagedObjectContext:context];
[courses setValue:rating forKey:#"courseRating"];
[courses setValue:slope forKey:#"courseSlope"];
[courses setValue:courseName forKey:#"courseName"];
rounds.courses = courses;
Tee * tee = [NSEntityDescription insertNewObjectForEntityForName:#"Tee" inManagedObjectContext:context];
[tee setValue:teeColor forKey:#"teeColor"];
courses.tees = tee;
NSError *error;
[context save:&error];
And then this is my FetchedResultsController
if (_fetchedResultsController != nil)
{
return _fetchedResultsController;
}
// Create the fetch request for the entity.
NSFetchRequest *fetchRequest = [[NSFetchRequest alloc] init];
fetchRequest.entity = [NSEntityDescription entityForName:#"Rounds" inManagedObjectContext:self.managedObjectContext];
// Set the batch size
[fetchRequest setFetchBatchSize:20];
// Set the sort descriptor
NSSortDescriptor * date = [[NSSortDescriptor alloc] initWithKey: #"roundDate"
ascending: NO];
NSArray * sortDescriptors = [NSArray arrayWithObjects: date, nil];
fetchRequest.sortDescriptors = sortDescriptors;
// Initialize fetched results controller - creates cache
NSFetchedResultsController *aFetchedResultsController = [[NSFetchedResultsController alloc]
initWithFetchRequest: fetchRequest
managedObjectContext: self.managedObjectContext
sectionNameKeyPath: nil
cacheName: #"Master"];
aFetchedResultsController.delegate = self;
self.fetchedResultsController = aFetchedResultsController;
// handle errors
NSError *error = nil;
if (![self.fetchedResultsController performFetch:&error]) {
/*
Replace this implementation with code to handle the error appropriately.
abort() causes the application to generate a crash log and terminate. You should not use this function in a shipping application, although it may be useful during development.
*/
NSLog(#"Unresolved error %#, %#", error, [error userInfo]);
abort();
}
return _fetchedResultsController;
How do I fetch the course name and tee (this will be the tee color) for the round in the tableview cell?
Thanks!!

Answer 1

Just follow the relationships. If you've got a one-to-many relationship between rounds and courses, you'd need to have a relationship on courses like rounds and the inverse relationship on rounds like course. So, if you've generated subclasses for your entities, you'd access the course name like this:
NSString *courseName = round.course.name;