db.define_table ('t', Field ('a'), Field ('b',requires=IS_EXPR('value!=
%s'% repr(request.vars.a)))
On Mar 28, 10:37 am, luifran <lbernalhernan...@yahoo.es> wrote:
> I have the following table, for example:
> db.define_table ('t', Field ('a '), Field ('b'))
> I want to impose the following restriction, to avoid insertion of
> duplicate records
> not allow insertion of a pair of identical values (a y b).
> How I can do this?, I know how to restrict a single field, but not
> both at once.
