title: What is the modern way to filter QuerySet inside custom QuerySet class in Django?
body: <p>I have a custom <code>QuerySet</code> class which is later used to create an objects manager in actual model somewhat like this:</p>
  
  <pre><code>class FooQuerySet(models.QuerySet):
      # some stuff in here ...
  
  class Foo(models.Model):
      objects = FooQuerySet.as_manager()
  </code></pre>
  
  <p>Now, I'd like to apply some <code>filter</code> like <code>filter(active=True)</code> to all <code>QuerySet</code> results from <code>FooQuerySet</code> without creating a Manager class, however it's not described in Django docs and I've not been able to find what I need in resources I've found on Internet.</p>