title: OR operator in Django model queries
body: <p>I'm trying to use an <code>OR</code> operator in the Django <code>filter()</code> function. Right now I have</p>
  
  <pre><code>contactlist = Contact.objects.filter(last_name__icontains=request.POST['query'])
  </code></pre>
  
  <p>but I also want to search by first name as well. For example:</p>
  
  <pre><code>contactlist = Contact.objects.filter(last_name__icontains=request.POST['query'] OR first_name__icontains=request.POST['query'])
  </code></pre>
  
  <p>Does anyone know how to do this? </p>