title: How do I search for a date field after or before a certain date in Active Record
body: <p>I know I can use a range to search where a date lies between 2 dates. For example:</p>
  
  <pre><code>User.where(:created_at =&gt; start_date..end_date )
  </code></pre>
  
  <p>But how would I do an open ended search for all dates before or after a date?</p>
  
  <p>Thanks for any help</p>