Fran, the code above was just an example.
You have to adapt the validator parameters to your own model, i.e. you
don't have a 'gis' table.

On Dec 3, 2:50 am, Fran <[EMAIL PROTECTED]> wrote:
> > Fran, the following validator seems to work as per your needs:
>
> This looks really nice - many thanks!
> Also looks generic enough to be worth including in Web2Py core
> (Massimo?)
> [Although I'm wondering whether it could still be worth adding the
> ability to package custom validators within an application to keep
> them portable. I guess the modules directory could be used for this so
> having a 'validators_custom.py' in that folder which gets hooked in
> sounds useful to me...]
>
> However if I put this into my db.py it fails:
>
> Traceback (most recent call last):
>   File "C:\Bin\web2py\gluon\restricted.py", line 62, in restricted
>     exec ccode in environment
>   File "C:\Bin\web2py\applications\sahana/models/db.py", line 107, in
> <module>
>     db.gis.key.requires=THIS_NOT_IN_DB(db
> (db.gis.service==request.vars.service),'gis.service',request.vars.service,'service
> already in use')
>   File "C:\Bin\web2py\gluon\validators.py", line 763, in __init__
>     field=self.dbset._db[tablename][fieldname]
> NameError: global name 'tablename' is not defined
>
> I've looked into the code & the only reason that I can think this
> would be the case is that request.vars.service is blank.
> I've tried to test this by appending a '?service=google' to the end of
> the URL but it still fails.
> I also tried moving this advanced validation to the controller or even
> view without luck...
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