Hi! Reading the validators section, it says: IS_NULL_OR Deprecated, an alias for IS_EMPTY_OR described below.
IS_EMPTY_OR
Sometimes you need to allow empty values on a field along with other
requirements. For example a field may be a date but it can also be
empty. The IS_EMPTY_OR validator allows this:
requires = IS_NULL_OR(IS_DATE())
I think the last sentence must be:
requires = IS_EMPTY_OR(IS_DATE())
Or please tell me if I'm wrong.
Bye.
PS: Sorry for my bad english
