oh thanks a lots. i didn't notice there is a IS_NULL_OR
-vince
On Dec 17, 4:10 pm, mdipierro <mdipie...@cs.depaul.edu> wrote:
> requires=IS_NULL_OR(IS_DATE('%Y-%m-%d',error_message='must be empty or
> iso date'))
>
> On Dec 17, 1:56 am, vince <lapcc...@gmail.com> wrote:
>
> > is that possible to define a SQLField as date so it is either empty or
> > a valid IS_DATE format?
>
> > -vince
>
>
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