static function update_comments($type, $id, $date_, $memo_)
{
if ($date_ == null) {
Mt::delete_comments($type, $id);
Mt::add_comments($type, $id, Yii::app()->dateFormatter->format('yyyy-MM-dd', time()), $memo_);
} else {
$criteria = new CDbCriteria();
$criteria->addCondition("type=" . $type);
$criteria->addCondition("id=" . $type_no);
$criteria->addCondition("date_=" . $date);
$comment = MtComments::model()->find($criteria);
$comment->memo_ = $memo_;
$comment->save();
}
}