On 03/06/2006, at 19:45, Joseph Wenninger wrote:
> Hi
>
> I've a form with nested compund widgets and I'm a littlebit lost
> about how to
> write a "complex" validation schema.
>
> Simplyfied the form result looks like the following dictionary.
>
> { 'basics': {'defaultgateway': {'ip_part_4': 111, 'ip_part_1': 111,
> 'ip_part_3': 111, 'ip_part_2': 111}, 'enabledisable': True}}
>
>
> I'd like to write a validation schema, which returns valid if:
> *) enabledisable in 'basics' is True and all the ip_part fields in the
> 'defaultgateway' are not empty
> *) enabledisable is False the ip_part fields should not be
> validated (they
> should be ignored) and the result should be true in any case
>
> My problem is I couldn't find a documentation how to write a nested
> validation
> schema. I can write a schema for single fields, or for one compound
> widget,
> but I can't figure out how to validate the widgets of two levels at
> the same
> time.
>
> Thanks in advance for any help
You could implement this with help of the 'state' parameter FE
validator methods accept. Basically it's an instance that will get
passed through all child validators where you can store... state :)
Unfortunately the 'validate' decorator where the form's validator
gets called doesn't pass any 'state' parameter when validating ATM as
it is very application specific.
Since you've got a use case here I think I might be able to commit a
patch for this on Monday (no promises though). Im thinking of
something like a config option (tg.validation_state_factory?) which
points to a callable (a là identity.user_class) which returns an app-
specific object where state can be passed.
Alberto
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