Kohana ORM configuration

class Model_Translation extends ORM{
	protected $_primary_key = 'text_id'; // this mark for checking the object has been loaded yet.
	protected $_table_name = 'text_language';
	protected $_belongs_to = array(
		'text' => array(
			'model' => 'text',
			'foreign_key' => 'text_id',
		)
	);
 
	public function  __construct($id = NULL) {
		parent::__construct($id);
	}
}