On Monday 24 November 2008 12:58:31 Eloi [entfe001] wrote:
> Another TG newbie.
>
> I have a problem with a SingleSelectField. I have a first form where
> the user selects from a SingleSelectField called Familia and then a
> second form exposes the user another SSF, called Cicle, with all the
> options related to the option selected on the first form. The second
> form constructs the SSF querying a database and filtering by the
> option on the first form.
>
> The problem comes when, on the second form, a validation error raises.
> That second form reappears displaying the errors as usual and
> refilling the form as sent but the SSF which resets to the "Pick one"
> option.
>
> I've checked that the value is passed correctly to the form, but it is
> lost when the form is displayed again.
>
> Here is the code involved:
>
> @expose(template="solconvenis.templates.solicitud")
> @error_handler(index)
> @validate(form=formFamilia)
> def solicitud(self, tg_errors=None, familia=None, cicle=None):
> if familia == None:
> raise redirect("/")
> if (tg_errors):
> flash(u"Si us plau, completeu correctament el formulari")
> # Construcció dinàmica dels desplegables de família i cicles
> cicles = getCiclesByFamilia(familia)
> opcions = dict(cicle=cicles)
> valors = dict(familia=familia,cicle=cicle)
> return dict(form=formEmpresa,opcions=opcions,valors=valors)
>
> [...]
>
> def getCiclesByFamilia(familia):
> """Opcions del desplegable de cicles filtrats per família
> professional."""
> cicles = Cicle.selectBy(familia=familia)
> opcions = [("", u"Tria un cicle")]
> for cicle in cicles:
> if cicle != None: # Descarta cicles ocults (tg_id IS NULL)
> opcions.append((cicle.codi, cicle.nom))
> return opcions
It is difficult to judge from your code-example as it does not display the
whole two-stage-process, but are you aware that you need to pass around *all*
form-fields of the first form, using hidden input fields in the second one?
Alternatively, you can use the session of course.
Diez
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