title: Rails4 FIND_IN_SET with PG not working
body: <p>Query </p>
  
  <pre><code>select * 
  from inboxes 
  where find_in_set ('6',inboxes.to);
  </code></pre>
  
  <p>Above query i am using for accessing record from my table 'inboxes' having one of the column 'to' values like (2,4,6,7) string separated by commas. I am using find_in_set function in pg but it shows me error with below hint.</p>
  
  <blockquote>
    <p>Hint: No function matches the given name and argument types. You might need to add explicit type casts. </p>
  </blockquote>