title: ActiveRecord: How to look for records where boolean field is not true?
body: <p>How would I do a combination of the 2 queries below?</p>
  
  <pre><code>    1.9.3-p484 :003 &gt; u = User.where(guest: false).count
         (2.4ms)  SELECT COUNT(*) FROM `users` WHERE `users`.`guest` = 0
       =&gt; 0 
      1.9.3-p484 :004 &gt; u = User.where(guest: nil).count
         (2.5ms)  SELECT COUNT(*) FROM `users` WHERE `users`.`guest` IS NULL
       =&gt; 4150
  </code></pre>
  
  <p>I want to grab users that either have a nil or false value for the guest column (in one statement).</p>