NSPredicate that is the equivalent of SQL's LIKE

IphoneCocoaCocoa TouchCore DataNspredicate

Iphone Problem Overview

I'm looking for a way to use NSPredicate to set a LIKE condition to fetch objects. In addition to that, an OR would be useful as well. I'm trying to do something where if a user searches "James" I can write an NSPredicate that will do the equivalent of:

select * from users where firstname LIKE '%James%' OR lastname LIKE '%James%';

Iphone Solutions

Solution 1 - Iphone

NSString *_mySearchKey = @"James";
NSPredicate *_myPredicate = [NSPredicate predicateWithFormat:@"(firstname CONTAINS[cd] %@) OR (lastname CONTAINS[cd] %@)", _mySearchKey, _mySearchKey];

Solution 2 - Iphone

The CONTAINS operator will certainly work just fine. If you're looking for a more direct correlation, then you can also use the LIKE operator (* = 0 or more characters, ? = 1 character):

NSString *_mySearchKey = @"James";
NSPredicate *_myPredicate = [NSPredicate predicateWithFormat:@"firstname LIKE '*%1$@*' OR lastname LIKE '*%1$@*'", _mySearchKey];

For reference:

Solution 3 - Iphone

Another possibility

@"firstname beginswith[c] James"

As a nice alternative to contains

Sometimes contains isn't always the right answer


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Content TypeOriginal AuthorOriginal Content on Stackoverflow
QuestionrandombitsView Question on Stackoverflow
Solution 1 - IphoneAlex ReynoldsView Answer on Stackoverflow
Solution 2 - IphoneDave DeLongView Answer on Stackoverflow
Solution 3 - IphoneM. RyanView Answer on Stackoverflow