> In a data model, if you create an entity with a Date attribute, is
> there a way to specify it to default to the current date and time
> without subclassing NSManagedObject? Is there a system variable or
> something you can put in the default field that will do this? The
> documentation is mum on this point, but it seems like there's little
> reason to have a default value field on Date entities if you can't do
> that.
I can't answer your question, but I can tell you that there is some value to
having a default date. It turns out that Core Data can't handle a nil date
properly - it treats nil as a time interval, and so a nil date winds up
looking like 1970. If a date in 1970 is valid from your application's
perspective, then nil dates become a serious problem, which you can solve by
making a default date be an invalid one, something like December 30th, 1899.
JT
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