title: Laravel 5.1, Eloquent where zero value
body: <pre><code>$sqLines = SqLines::whereDocumentId($id)-&gt;get();
  $sqLines-&gt;where('item_id','=',0)-&gt;count();
  </code></pre>
  
  <p>item_id is an unsigned integer field</p>
  
  <p>In my development server, it shows result but in my production server with the record exists.
  Any reason it happen?</p>