-- Joe Czhlobatnik <yogl...@hotmail.com> wrote
(on Monday, 17 August 2009, 10:05 AM -0400):
> > > It seems that it's not possible to alias validators in the manner one can
> alias
> > > decorators. Is there any way to use multiple validators of the same type
> > > on
> a
> > > single field without extending the class to rename it?
> >
> > Can you present a use case?
> >
> > Validators (and filters) are usually very, very specific in what they
> > do, and running the same validator multiple times would be redundant.
> > For this reason, there's been no functionality to do aliased validators
> > or filters.
>
> I can see how this makes no sense for all validators, save one
> -- Db_NoRecordExists. I simply want to check a field against more than one
> table.
>
> Let's say I have one table that contains existing users and one that contains
> banned usernames. I don't want to have to populate a complete user record and
> then set it to be invalid just for the sake of banning a particular username.
>
> Or (my actual case) I have one table that contains info for validated and
> active users, and one that contains info for not yet validated new user
> requests. They're in two separate tables because the request table contains
> much more information than the user table, but once the account is approved,
> that information is no longer needed. So rather than keep that useless info
> around in the user table, there are two separate tables, and the associated
> request record gets deleted when the new user gets approved. What I'd like to
> do is have the "request a new username" form abort if there is an existing
> username or a pending request for that username.
In this particular case, I'd create a Zend_Validate object and attach
several Db_(No)RecordExists validators to it -- then attach the master
object to your form. This gives you the benefit of multiple validators
and eliminates the need for Aliases.
$chain = new Zend_Validate();
$foo = new Zend_Validate_Db_NoRecordExists(...);
$bar = new Zend_Validate_Db_NoRecordExists(...);
$chain->addValidator($foo)
->addValidator($bar);
$element->addValidator($chain);
--
Matthew Weier O'Phinney
Project Lead | matt...@zend.com
Zend Framework | http://framework.zend.com/
