title: How do I modify the output of a Mongoose query?
body: <p>I have a field in my MongoDB collection <code>products</code> called <code>date_expired</code>.</p>
  
  <p>It's of <code>type: date</code> and stores the a date string.</p>
  
  <p>I want to retrieve all the products and change the <code>date_expired</code> property in the result to number of hours left from now. How do I do this?</p>
  
  <p>It's similar to <code>getter()</code> in Laravel...?</p>