Hi,
I am trying to prevent duplicates being created in a core data app
and am using a fetch to search for duplicates but excluding the
managedObject itself. I am using the following predicate;
NSPredicate *predicate = [NSPredicate predicateWithFormat:@"(descript
= %@) AND (self != %@)", *ioValue, [self objectID]];
This works fine if I use the same context that I loaded the data with
but if I use a new context associated with the same model and
persistent store it does not. It always returns the originating object
as well. The self filter does not seem to work in a new context. I
am using a different context since mainly as a look-up context to
avoid polluting the main context with look-up data.
What am I missing?
Regards
Des Cullen.
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