แนะนำ Agile Toolkit Framework (ATK4) ซึ่งอาจทำให้ชีวิตง่ายขึ้น

class Model_Users extends Model_Table{
    public $table = 'user';
    function init() {
        parent::init();
        $this->addField('display_name')->caption('Display name');
        $this->addField('email');//->type('email'); 
        $this->addField('password')->type('password')->mandatory('Enter the password.');
        $this->addField('birth_date')->type('date');
        $this->addField('created')->type('datetime')->defaultValue(date('Y-m-d H:i:s'));
        $this->addField('status')->enum(array('active','ban','disable'))->mandatory('Please select user status.')->defaultValue('active');
        $this->addField('is_admin')->type('boolean')->caption('Admin');
        $this->addField('is_editor')->type('boolean')->caption('Editor');
        $this->addField('is_blogger')->type('boolean')->caption('Blogger');
        $this->addField('is_member')->type('boolean')->defaultValue(1)->caption('Member');
        
        $this->addHook('beforeSave',function($m){
            $m['email'] = trim(strtolower($m['email']));
        });
    }
}

class page_test extends Page {
    public function init() {
        parent::init();
        //--------- CRUD ---------
        $crud = $this->add('CRUD');
        $crud->setModel('Users');
        if ($crud->grid) {
            $crud->grid->getColumn('display_name')->makeSortable();
            $crud->grid->getColumn('email')->makeSortable();
            $crud->grid->getColumn('created')->makeSortable();
            $crud->grid->addQuickSearch(array('display_name', 'email'));
            $crud->grid->addPaginator(5);
        }
        //--------- Form ---------
        
        $this->add('HTML')->set('<h2>Test user form</h2>');
        $form = $this->add('Form');
        $form->setModel('Users');
        $form->addSubmit();
    }

}

$this->add('CRUD');

$this->hasOne('User', 'user_id', 'display_name');

$this->addField('blog_category_id')->refModel('Blog_Category')->mandatory(true); // อ้างอิงไปยังโมเดล Blog_Category