public function createLog($user_id)
{
$model = new SysLog();
$time = time();
$model->user_id = $user_id;
$model->user_name = User::getNameById($user_id);
$model->log_time = $time;
$model->message = "登陆成功！";
$model->log_ip = Yii::app()->request->userHostAddress;
if (SysLog::model()->count("user_id=:user_id and log_time=:log_time", array(":user_id" => $user_id, ":lig_time" => $time)) == 0) {
$model->save();
}
}
