I'm experimenting with Zend_Form right now, and am trying to integrate a custom validation routine on a form field.

I have created a file called TestVal.php and saved it in My/Validate/ to match this class name:

class My_Validate_TestVal extends Zend_Validate_Abstract
{
...

It has a single isValid method which does a silly test on its value and returns a boolean.

My difficulty is in calling this thing:

In the form controller, I have this code:
//add prefix to all elements
$this->addElementPrefixPath('My_Validate','My/Validate/','validate');


$testing = new Zend_Form_Element_Text('testing');
$testing->setLabel('Test Val')
->setRequired(true);

$testing->addValidator('TestVal');

$testing->setValidators($validators);

//etc...

Running this code generates this error:

Error: Plugin by name TestVal was not found in the registry.

Note that the My/ folder is underneath the application root and is in the include path.

Thanks for any assistance.

chinaski