Soft delete in cakephp

AppModel.php

    /**
     * Override Model::delete() to implement a soft-delete feature for this model
     * requires the model to have a 'deleted' boolean column
     *
     * @return boolean
     **/
    public function delete($id = null, $cascade = true) {
        if ($id === null) {
            $id = $this->id;
        }
        $this->id = $id;
        $event = new CakeEvent('Model.beforeDelete', $this, array($cascade));
        list($event->break, $event->breakOn) = array(true, array(false, null));
        $this->getEventManager()->dispatch($event);
        if (!$event->isStopped()) {
            if (!$this->exists()) {
                return false;
            } 

            $this->_deleteDependent($id, $cascade);
            $this->_deleteLinks($id);
            $this->id = $id;
            $data = array(
                $this->primaryKey => $id,
                'deleted' => true
            );
            if ($this->save($data, array('validate' => false, 'callbacks' => false))) {
                $this->getEventManager()->dispatch(new CakeEvent('Model.afterDelete', $this));
                $this->_clearCache();
                $this->id = false;
                return true;
            }
        }