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POiOS Complex sectionNameKeyPath issue
 

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  1. POiOS Complex sectionNameKeyPath issue
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    <p>I am trying to create a NSFetchedResultsController using date and type.</p> <p>My Data looks like this :</p> <pre><code>{ @"date", NSDate, @"type", NSString } </code></pre> <p>This is what my NSManagedObject</p> <pre><code>- (NSString*)dayTypeStringOnly { NSCalendar *cal = [NSCalendar currentCalendar]; return [NSString stringWithFormat:@"%i%i%i%@", (int)[[cal components:NSYearCalendarUnit fromDate:self.startTime] year],(int)[[cal components:NSMonthCalendarUnit fromDate:self.startTime] month],(int)[[cal components:NSDayCalendarUnit fromDate:self.date] day], [self.type lowercaseString]]; } </code></pre> <p>Here is my NSFetchedResultsController:</p> <pre><code>NSFetchRequest *dataRequest = [NSFetchRequest fetchRequestWithEntityName:entityName]; [dataRequest setPredicate:kHiddenPredicate]; [dataRequest setFetchBatchSize:kMagicalRecordDefaultBatchSize]; NSSortDescriptor *sortDescriptor = [[NSSortDescriptor alloc] initWithKey:@"type" ascending:NO selector:@selector(caseInsensitiveCompare:)]; [dataRequest setSortDescriptors:@[[NSSortDescriptor sortDescriptorWithKey:@"date" ascending:YES], sortDescriptor]]; NSFetchedResultsController *dataFetchedResultsController = [[NSFetchedResultsController alloc] initWithFetchRequest:dataRequest managedObjectContext:[NSManagedObjectContext MR_defaultContext] sectionNameKeyPath:@"dayTypeStringOnly" cacheName:nil]; </code></pre> <p>I am getting this error:</p> <pre><code>Unresolved error Error Domain=NSCocoaErrorDomain Code=134060 "The operation couldn’t be completed. (Cocoa error 134060.)" UserInfo=0x10e847230 {reason=The fetched object at index 8 has an out of order section name '20131011pump. Objects must be sorted by section name'}, { reason = "The fetched object at index 8 has an out of order section name '20131011pump. Objects must be sorted by section name'"; </code></pre> <p>Can anyone see what I am doing wrong here?</p>
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    1. USTim Walsh
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    1. COHint: the `dayTypeStringOnly` needs to go first in the sort descriptors, then add your other sort descriptors after.
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      1. POiOS Complex sectionNameKeyPath issue
      1. USiwasrobbed
    2. COI think the problem is that `dayTypeStringOnly`, his only attributes are `@"date"` and `@"type"`
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      1. POiOS Complex sectionNameKeyPath issue
      1. USKevin
    3. CO@Kevin He has a custom getter called `dayTypeStringOnly` in the `NSManagedObject` subclass. This is standard for creating derived properties from actual model properties like he is doing.
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      1. POiOS Complex sectionNameKeyPath issue
      1. USiwasrobbed
 

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