title: How to get yesterday data from Rails ActiveRecord
body: <p>If I have a <code>meet</code> Model in Rails,now I want to get the record yesterday,how should I do?</p>
  
  <pre><code>Meet.where(:created_at=&gt; ) # what should I write here?
  </code></pre>
  
  <p>Or ActiveRecord comes with some method to filter the yesterday record?</p>