title: Why does declaring a manager to a Django model, void "objects"
body: <p>I have declared a manager to the following model, but after doing so, I can no longer use <code>List.objects.get()</code>. Anybody know why?</p>
  
  <pre><code>class List(models.Model):
    title = models.CharField(max_length=20, unique=True)
    archived = models.BooleanField()
  
    archived_lists = ArchivedListManager()
    active_lists = ActiveListManager()
  </code></pre>
  
  <p>And the managers:</p>
  
  <pre><code>class ArchivedListManager(models.Manager):
    def get_query_set(self):
      return super(ArchivedListManager, self).get_query_set().filter(archived=True)
  
  class ActiveListManager(models.Manager):
    def get_query_set(self):
      return super(ActiveListManager, self).get_query_set().filter(archived=False)
  </code></pre>
  
  <p>The error is <code>type object 'List' has no attribute 'objects'</code></p>