When you need to use additional validators with IS_IN_DB but still want the
dropbox, you can add the additional validators to the IS_IN_DB validator via
its '_and' argument -- see
http://web2py.com/book/default/chapter/07#Database-Validators. However, I'm
not sure if that works when IS_IN_DB is inside an IS_NULL_OR validator.
(Actually, IS_NULL_OR has been deprecated in favor of IS_EMPTY_OR.)
Anthony
On Tuesday, June 21, 2011 5:16:12 PM UTC-4, Richard wrote:
> Hello,
>
> I would like to know if the problem I face coming from the validator that I
> write or is a IS_IN_DB behavior in case of multiple validators??
>
> Here my validator :
>
> class ONLY_ONE_CAN_BE_FILLED(object):
> """Class representing a validator requiring at least one non-empty
> field in a set. """
> def __init__(
> self,
> others,
> error_message='Enter a value in at least one field'
> ):
> self.others = others
> self.error_message = error_message
>
> def __call__(self, value):
> okay = (value, None)
> error = (value, self.error_message)
> values = []
> values.append(value)
> values.extend(self.others)
> empties = []
> for v in values:
> unused_v, empty = is_empty(v)
> empties.append(empty)
> if empties.count(False) == 1:
> return okay
> else:
> return error
>
>
> But when i use it like this I lost my dropbox for the FK field1 :
>
> db.table.field1.requires =\
> [IS_NULL_OR(IS_IN_DB(db,'othertable.id
> ','%(fieldrepresent)s',orderby=('fieldrepresent'))),
> ONLY_ONE_CAN_BE_FILLED([request.vars.field2],error_message='Select a
> volume or an folder')]
>
> I remember I read something about IS_IN_DB and [IS_IN_DB]...
>
> Can I have the dropbox and the multiple validators at the same time??
>
> Thanks
>
> Richard
>
>
>
