On 7 Feb 2012, at 2:48 PM, Laurent Daudelin wrote:
> I have a very simple model with a table and some attributes in it. For some
> reason, I have an NSDate attribute that I want to use for a sort descriptor.
> The problem I'm having is that when I have my NSFetchedResultsController
> fetches the database, the NSDate attribute of all my fetched objects is
> always the current date, or now. When I look at the table in the database
> directly, I see there are different values for this attribute. There isn't
> any trick or manipulation behind the scene, my subclass of NSManagedObject
> just declares the properties that are in the table, nothing more, nothing
> less. I then added an NSString and basically the same thing is happening:
> when I look at the attribute in the table in the database, there are values
> for this string but when I fetch with my NSFetchedResultsController, all the
> strings are nil.
iOS or Mac? What project template did you start with?
Are you building the Core Data stack yourself? If Mac, are you using a
persistent document?
How are you initializing the fetched-results controller?
Have you verified that all the objects coming back from your fetches have
different objectIDs?
You say your managed-object subclass declares properties for all the entity's
(I think you mean "entity" when you say "table") attributes, but did you also
specify @dynamic for the properties?
Try instantiating a new project (for whatever your platform is) that you'll
throw away, so you can see how the various setups are done. An iOS
master-detail application that uses Core Data will demonstrate both the
Core-Data stack initialization and how to set up the fetched-results controller.
— F
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