My suggestion is use the validators for the drop box only, define
def my_check(form):
if db( (db.shapecolormonth.shapename==form.vars.shapename) &
(db.shapecolormonth.shapecolor==form.vars.shapecolor) &
(db.shapecolormonth.month==form.vars.month) ).count():
form.errors.month='sorry, shape+color+month combo have to be
unique'
return
then in SQLFORM set
SQLFORM(....,onvalidation=my_check)
This is not the only solution. You could do everything with
validators, but this solution is simpler.
Massimo
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