title: How the url should be stored in records?
body: <p>I have a question.  </p>
  
  <p>I have comment model, in which it has body column that users can type anything in there.<br>
  obviously user might type the url link to other website.<br>
  In my guess, I think it should be replaced with <strong>&lt; a href ></strong> tag when it is being saved.<br>
  Is there any good gem or something to handle this kind of thing?</p>