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PONSFetchRequest / Predicate Question
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copied!<p>I have two entities: Patient and Job. Patient has a to-many relationship to Job called 'jobs' and Job has a to-one relationship to Patient called 'patient'. Job has attributes called 'dueDate' (Date) and 'completed' (BOOL) and Patient has attributes 'firstName' and 'lastName' (both Strings).</p> <p>I am trying to create a fetch request / predicate for my NSFetchedResultsController that we grab all Jobs that have not been completed (i.e. completed == NO) and section them by Patient name. Here is my code:</p> <pre><code>NSFetchRequest *fetchRequest = [[NSFetchRequest alloc] init]; NSEntityDescription *entity = [NSEntityDescription entityForName:@"Job" inManagedObjectContext:moc]; [fetchRequest setEntity:entity]; NSPredicate *predicate = [NSPredicate predicateWithFormat:@"(completed == NO)"]; [fetchRequest setPredicate:predicate]; NSSortDescriptor *patientDescriptor = [[NSSortDescriptor alloc] initWithKey:@"patient" ascending:YES]; NSSortDescriptor *dueDateDescriptor = [[NSSortDescriptor alloc] initWithKey:@"dueDate" ascending:NO]; NSArray *sortDescriptors = [[NSArray alloc] initWithObjects:patientDescriptor, dueDateDescriptor, nil]; NSFetchedResultsController *aFetchedResultsController = [[NSFetchedResultsController alloc] initWithFetchRequest:fetchRequest managedObjectContext:moc sectionNameKeyPath:@"patient" cacheName:@"Jobs"]; </code></pre> <p>Here is my titleForHeaderInSection method:</p> <pre><code>NSIndexPath *indexPath = [NSIndexPath indexPathForRow:0 inSection:section]; NSString *firstName = [[(Job *)[fetchedResultsController objectAtIndexPath:indexPath] patient] firstName]; NSString *lastName = [[(Job *)[fetchedResultsController objectAtIndexPath:indexPath] patient] lastName]; return [NSString stringWithFormat:@"%@ %@", firstName, lastName]; </code></pre> <p>This doesn't seem to work. Am I going about this the wrong way?</p>

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