title: Django Filtering by FK more than x value count
body: <p>I hope you can see what I'm trying to do with the following line...</p>
  
  <pre><code>Group.objects.filter(contacts.count&gt;1)
  </code></pre>
  
  <p>I want to filter and only get groups that have more than 1 related contact.</p>
  
  <p>Above will not work so how should it be done?</p>
  
  <p>Thanks</p>
  
  <p><strong>models.py</strong></p>
  
  <pre><code>class Contact(models.Model):
      first_name = models.CharField(max_length=60)
      group = models.ForeignKey(Group, related_name='contacts')
  
  
  class Group(models.Model):
      name = models.CharField(max_length=60)
  </code></pre>