Using core validation within custom validation on CakePHP Forms/Models?

Question

Using CakePHP 1.3

I understand the example at http://book.cakephp.org/complete/1143/Data-Validation#Adding-your-own-Validation-Methods-1181 on how to add my own

Answer 1

Validation::numeric($this->data['field'])

Validation class (validation.php) is located in cake/cake/libs and you can see the available methods by inspecting the file (they're the same as the ones you pass to the validation array).

Validation methods return true if validation passes.