iOS NSManagedObject Data <fault> while deleting - ios

Question

I am having some difficulties in deleting an entry from Core Data.
It works but the NSManagedObject data has no values (fault), and so sometimes the wrong entry will be deleted.
In my deleteWholeDatabase method the objects are filled with values.
And in the deleteEntryFromDatabase method are no values. But why?
Here are my methods:
-(NSArray*)databaseRequest{
NSFetchRequest *fetchRequest = [[NSFetchRequest alloc] init];
NSEntityDescription *entity = [NSEntityDescription entityForName:currentEntity inManagedObjectContext:managedObjectContext];
[fetchRequest setEntity:entity];
[fetchRequest setReturnsObjectsAsFaults:NO];
NSError *error;
NSArray *items = [managedObjectContext executeFetchRequest:fetchRequest error:&error];
return items;
}
-(void)deleteWholeDatabase{
for (NSManagedObject *objectToDelete in [self databaseRequest]) {
[managedObjectContext deleteObject:objectToDelete];
NSLog(#"%# object deleted",objectToDelete);
}
[self saveContext];
NSLog(#"All entries deleted!");
}
-(void)deleteEntryFromDatabase:(NSManagedObjectContext*)context forEntry:(NSIndexPath*)indexPath{
NSManagedObject *objectToDelete=[[self databaseRequest] objectAtIndex:indexPath.row];
[managedObjectContext deleteObject:[managedObjectContext objectWithID:[objectToDelete objectID]]];
[self saveContext];
NSLog(#"%# deleted!",[managedObjectContext objectWithID:[objectToDelete objectID]]);
}

Answer 1

The wrong entry is being deleted because each request return the itens in a different order. Try deleting the intens by comparing their memory adress

Answer 2

Instead of keeping a calling [self databaseRequest] everywhere, I would keep a local copy of NSManagedObjectID's as an array.
- (void)init {
self.entities = [self databaseRequest];
}
-(NSArray*)databaseRequest{
NSFetchRequest *fetchRequest = [[NSFetchRequest alloc] init];
NSEntityDescription *entity = [NSEntityDescription entityForName:currentEntity inManagedObjectContext:managedObjectContext];
[fetchRequest setEntity:entity];
[fetchRequest setReturnsObjectsAsFaults:NO];
NSError *error;
NSArray *items = [managedObjectContext executeFetchRequest:fetchRequest error:&error];
NSMutableArray *itemIDs = [[NSMutableArray alloc] initWithCapacity:[items count]];
for (NSManangedObject *item in items) {
[itemIDs addObject:[item objectID]];
}
return items;
}
Then everywhere where you call [self databaseRequest], you will get an have the correct NSManagedObjectID. Then you just need to get the correct entity from the ID.