thinkphp中增加一条记录，这样写对吗？

Question

$userinfo = M('home_user');
$userAdd=array(

'id'=>'',

'ip'=>'tom',

'openid'=>'123',

'hotid'=>'[e-mail]',

'firsttime'=>time()
);

$userinfo->add($userAdd);

echo var_dump($userinfo);