Author.php

<?php
#/app/Model/Author.php
class Author extends AppModel {
     public $name = 'Author';
     public $displayField = 'name'  
     public  $hasMany = array('Book');
     public $validate = array(
         'name' => array(
            'rule' => array('notEmpty'),
            'required' => true,
            'allowEmpty' => false,
            'message' => 'Inserire il Nome'
         ),
         'surname' => array(
            'rule' => array('notEmpty'),
            'required' => true,
            'allowEmpty' => false,
            'message' => 'Inserire Cognome'
        ),
        'email' => array(
            'mail' => array(
                 'rule' => 'email',
                 'allowEmpty' => false,
                 'required' => true,
                 'message' => 'Inserire un indirizzo email valido'
            ),
            'vuoto' => array(
                'rule' => array('notEmpty'),
                'allowEmpty' => false,
                'required' => true,
                'message' => 'Inserire una mail.'
            )
        ),
    );
}