Hi Jason,
On 15/03/2006, at 3:41, Jason Chu wrote:
> One such form contains something that extends SelectionField. This
> widget
> needs its list of options when it's instantiated (it's possible to
> do it
> later, but you'd have to pass it its own validator...). The list of
> options for the widget is taken from the current user, so we have to
> generate the form at request time, not before. To use this form for
> validation, we pass it to the validate decorator as a class, not an
> instance.
>
You can initialize the form just once and pass the SelectionField a
callable as options which will return fresh options in each display.
This is how I implement something similar in an app Im working on.
def get_options():
return options_for_current_user
TableForm(fields=[
SingleSelectField("lalala", options=get_options),
...
])
Generally, all forms should be instantiated just once so a schema can
be auto-generated for it's fields for later validation (talking SVN
here). That is, the same form instance should handle it's display AND
it's validation.
Alberto
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