Simple field setters for CakePHP 2.X.X

AppModel.php

<?php

class AppModel extends Model {

    public function beforeValidate($options = array()) {
        $this->_setupSetters();

        return true;
    }

    protected function _setupSetters() {
        foreach ($this->data[$this->alias] as $key => $value) {
            $methodName = '_set' . Inflector::camelize($key);

            if (method_exists($this, $methodName)) {
                $this->data[$this->alias][$key] = call_user_func([$this, $methodName], $value);
            }
        }
    }

User.php

<?php

class User extends AppModel {

    public $displayField = 'name';
    
    protected function _setName($value) {
        return str_rot13($value);
    }