public function clearSelect()
{
$this->last_select_user_id = $this->select_user_id;
$select = new Select();
$select->day = $this->room->day;
$select->state = $this->state;
$select->selected_mate_id = $this->select_user_id;
$select->save();
$this->select_user_id = null;
$this->save();
}
