Core Data: Non Duplicate Records

[mediatagging]

I'm running Core Data and would like to have my data set return distinct values

Below is my code:

 // Create the fetch request for the entity.
    NSFetchRequest *fetchRequest = [[NSFetchRequest alloc] init];
    // Edit the entity name as appropriate.
    NSEntityDescription *entity = [NSEntityDescription entityForName:@"Playlist" inManagedObjectContext:self.managedObjectContext];
	NSDictionary *entityProperties = [entity propertiesByName];

	[fetchRequest setEntity:entity];
	[fetchRequest setReturnsDistinctResults:YES];
	[fetchRequest setPropertiesToFetch:[NSArray arrayWithObject:[entityProperties objectForKey:@"name"]]];

It still returns duplicates. Any suggestions?

Thanks

[mediatagging]

Originally Posted by mediatagging

I'm running Core Data and would like to have my data set return distinct values

Below is my code:

 // Create the fetch request for the entity.
    NSFetchRequest *fetchRequest = [[NSFetchRequest alloc] init];
    // Edit the entity name as appropriate.
    NSEntityDescription *entity = [NSEntityDescription entityForName:@"Playlist" inManagedObjectContext:self.managedObjectContext];
	NSDictionary *entityProperties = [entity propertiesByName];

	[fetchRequest setEntity:entity];
	[fetchRequest setReturnsDistinctResults:YES];
	[fetchRequest setPropertiesToFetch:[NSArray arrayWithObject:[entityProperties objectForKey:@"name"]]];

It still returns duplicates. Any suggestions?

Thanks

We need to make two changes:

1. [fetchRequest setResultType:NSDictionaryResultType];

This will return an array of dictionaries instead of a FetchedResultsController

Store the fetch into an NSArray.