CODEWITHSUNDEEP
iphoneobjective-cipadcore-data
AMH
AMH

Reputation: 6451

the default of attribute in coredata

I did versioning and I added a new attribute of type string

it will be empty at first I want to create a predicate to check for the empty attribute I tried 

[fetchRequest setPredicate:[NSPredicate predicateWithFormat:
                            @"( SeriesStudyID == '""' )"  ]];

but it doesn't work

what's the default of this attribute and how to detect the empty

Upvotes: 0

Views: 90

Answers (1)

Vijay-Apple-Dev.blogspot.com
Vijay-Apple-Dev.blogspot.com

Reputation: 25692

SeriesStudyID is NSString

if ([SeriesStudyID length]<=0) {

    NSLog(@"empty");
}

else {
    NSLog(@"not empty");
}

Upvotes: 1

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