Rails - Aug 2006 - how to use SELECT....RAND() the rails way?

How can I use this query the rails way?

 $query = "SELECT * FROM images ORDER BY RAND() LIMIT 16";

-- 
Jochen

> How can I use this query the rails way?
>
> $query = "SELECT * FROM images ORDER BY RAND() LIMIT 16";
Image.find(:all, :order => ''RAND()'', :limit => 16)

Just keep in mind that if there are a million rows in that table mysql is 
going to look at them all, add a RAND() column, sort it, then return the 
first 16.

Which could get expensive db-wise...

-philip