Filtering NSManagedObjects by boolean attribute using NSPredicate

Question

I am trying to filter an array of NSManagedObjects by deleted = NO this filtering does not work. The deleted field has a default value so nil should not be an issue.

possible duplicate of [Core Data NSPredicate predicateWithBlock and predicateWithFormat in Parent Child Context](http://stackoverflow.com/questions/16000242/core-data-nspredicate-predicatewithblock-and-predicatewithformat-in-parent-child) — Martin R, Mar 05 '14 at 05:40

score 2 · Accepted Answer · answered Mar 04 '14 at 22:46

The answer to this question is to change the field name. There are some secret reserved words used in CoreData that are not apparent. I have had issues with other fields called address1 and name too. This person has also had problems with readOnly: http://lists.apple.com/archives/cocoa-dev/2007/Nov/msg00412.html

score 0 · Answer 2 · answered Mar 04 '14 at 22:46

0

comparing your BOOL in an NSPredicate this way should work:

[NSPredicate predicateWithFormat:@"deleted == %@", [NSNumber numberWithBool: NO]];

answered Mar 04 '14 at 22:46

Sascha Manuel Hameister

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Using a plain old `BOOL` is fine in a predicate, as long as the format string uses `%d`. – Tom Harrington Mar 04 '14 at 23:50

Filtering NSManagedObjects by boolean attribute using NSPredicate

2 Answers2