NSPredicate with ANY and "=nil" doesn't work

Question

This condition works

NSPredicate *predicate = [NSPredicate predicateWithFormat:
       @"ANY region.beacons.major = %d",rangedBeacon.major.intValue];

But this not

NSPredicate *predicate = [NSPredicate predicateWithFormat:
       @"ANY region.beacons.minor = nil"];

beacons is a list inside region object. Major and minor have type NSNumber

I don't understand why you keep reposting your question instead of modifying it, narrowing down your issue. Do you have a sample for regions & beacons? Also, are your filtering a array ? Doing a CoreData Request? — Larme, Sep 13 '16 at 08:07

score 0 · Answer 1 · answered Sep 13 '16 at 06:27

0

You may try this:

NSPredicate *predicate = [NSPredicate predicateWithFormat:@"ANY region.beacons.minor = $minor"];
predicate = [predicate predicateWithSubstitutionVariables:
[NSDictionary  dictionaryWithObject:[NSNull null] forKey: @"minor"]];

answered Sep 13 '16 at 06:27

ZetaPR

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7
32

No, unfortunately. – Konstantin.Efimenko Sep 13 '16 at 06:40
You may check this link as you said major and minor are NSNumber, for checking empty values: http://stackoverflow.com/questions/3716599/check-if-nsnumber-is-empty – ZetaPR Sep 13 '16 at 06:44

score 0 · Accepted Answer · edited May 23 '17 at 10:29

0

I found solution

Because of ANY and "=nil" can't be in the same condition (explanation is here Core Data, NSPredicate, ANY key.path == nil)? solution of this problem looks like:

NSPredicate *predicate = [NSPredicate predicateWithFormat:
      @"SUBQUERY(region.beacons, $x, $x.minor == nil)"];

edited May 23 '17 at 10:29

Community

1
1

answered Sep 13 '16 at 09:19

Konstantin.Efimenko

1,242
1
14
38

NSPredicate with ANY and "=nil" doesn't work

2 Answers2