Thanks, I'll try that way
On Mar 28, 8:59 am, Massimo Di Pierro <massimo.dipie...@gmail.com>
wrote:
> 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:
>
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> > 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.
