title: sum of two variables in django
body: <p>I am trying to get the sum of 'a' and 'b' and display it with each post. But I am getting the error - 'Count' object has no attribute 'split'. Can someone please help. Thanks</p>
  
  <pre><code>def get_queryset(self):
      a = Count('blogger__posts__title')
      b = Count('blogger__posts__likes')
  
     return (Blog.objects.filter(date__lte=timezone.now())
                                      .order_by('-date')
                                      .annotate(score=Sum(F(a)+F(b),output_field=FloatField()))
              )
  </code></pre>