If you are going to use a callable as the first argument to IS_EXPR, then
that callable should either return None (if no error) or an error message
(not sure why it was done that way -- and it's not documented).
Anthony
On Wednesday, January 18, 2017 at 12:13:36 PM UTC-5, Jorrit wrote:
>
> I have this model, where I want to validate that the end_timeslot is not
> below the start_timeslot:
>
> db.define_table('staffingexception',
> Field('employee_id', 'reference auth_user'),
> Field('from_date', 'date', required=True),
> Field('to_date', 'date', required=True),
> Field('from_location', 'reference location', required=True),
> Field('to_location', 'reference location', required=True),
> Field('start_timeslot', 'text', required=True),
> Field('end_timeslot', 'text', required=True),
> )
>
> db.staffingexception.to_location.requires = IS_IN_DB(db, 'location.id',
> '%(name)s')
> db.staffingexception.end_timeslot.requires = IS_EXPR(lambda value: int(value)
> > int(request.post_vars.start_timeslot),
> error_message='Eindtijd
> moet na de starttijd liggen.')
>
>
> This raises either True of False as an error, instead of passing it when
> the expression evaluates to True. What am I doing wrong?
>
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