Save HABTM relationships CakePHP 2

AppModel.php

<?php
 
App::uses('Model', 'Model');
 
class AppModel extends Model {
 
 public function beforeSave($options = array()) {
 
        // save our HABTM relationships
        foreach (array_keys($this->hasAndBelongsToMany) as $model){
                if(isset($this->data[$this->name][$model])){
                        $this->data[$model][$model] = $this->data[$this->name][$model];
                        unset($this->data[$this->name][$model]);
                }
        }
    }
}
?>