It seems that I can't sort on a read-only synthesized property in my NSManagedObject subclass. I'd like to sort a bunch of stuff into some sections, but the definition of a section is somewhat complex, depending on multiple other properties. So, I defined a property "section" like this:
- (NSUInteger)
section
{
if (self.active.boolValue)
{
return 1;
}
else if (self.dateClosed != nil)
{
return 3;
}
else
{
return 2;
}
}
+ (NSSet*)
keyPathsForValuesAffectingSection
{
return [NSSet setWithObjects: @"active", @"dateClosed", nil];
}
I similarly define a "sectionName" property, but the NSFetchedResultsController
has no problem using that to section the table view.
Unfortunately, I get an exception when I attempt to execute the fetch while
sorting on "section". Is there any way to accomplish what I need?
--
Rick
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