Most recent search results are merged into Core Data

This is the next question to the previous post, saving recent searches using master data.

To group the search results, I have an Entry object and a History element. Entry.history is a relation to History. History.entries is a to-many relationship to Entry (inverse to Entry.history). History has a date attribute createdAt. I'm trying to figure out how to get all the Entities belonging to the most recent History object in the NSFetchedResultsController.

I can get the most recent history object like this:

    NSFetchRequest *request = [[NSFetchRequest alloc] init];
    NSEntityDescription *entity = [NSEntityDescription entityForName:@"History" inManagedObjectContext:context];
    [request setEntity:entity];
    NSSortDescriptor *sortDescriptor = [[NSSortDescriptor alloc] initWithKey:@"createdAt" ascending:NO];
    NSArray *sortDescriptors = [[NSArray alloc] initWithObjects:sortDescriptor, nil];
    [request setSortDescriptors:sortDescriptors];
    [request setFetchLimit:1];
    NSArray *results = [context executeFetchRequest:request error:&error];
    History *history = (History *)[results objectAtIndex:0];

      

        
        
        
      

    

And then Entry objects in NSFetchedResultsController for example

    NSPredicate *predicate = [NSPredicate predicateWithFormat:@"history == %@", history];
    request = [[NSFetchRequest alloc] init];
    entity = [NSEntityDescription entityForName:@"Entry" inManagedObjectContext:context];
    [request setEntity:entity];
    [request setPredicate:predicate];
    fetchedResultsController = [[NSFetchedResultsController alloc] initWithFetchRequest:request managedObjectContext:context sectionNameKeyPath:nil cacheName:@"Root"];
      

        
        
        
      

    

But I want to do it in one request. Note that I don't care that fetchedResultsController stores the results of the input.