Returns some statistics when rating an object using ajax request

ratings/models.py

@@ -207,6 +207,10 @@ def unrate(self, user):
             def perform_aggregation(self, aggregator):
                 score = self.all().aggregate(agg=aggregator('score'))
                 return score['agg']
+
+            def count(self):
+                # the number of votes
+                return self.perform_aggregation(models.Count)
 
             def cumulative_score(self):
                 # simply the sum of all scores, useful for +1/-1

ratings/views.py

@@ -5,6 +5,7 @@
     HttpResponseNotAllowed, Http404
 from django.shortcuts import get_object_or_404
 
+import json
 
 # allow GET requests to create ratings -- this goes against the "GET" requests
 # should be idempotent but avoids the necessity of using <form> elements or
@@ -35,7 +36,14 @@ def rate_object(request, ct, pk, score=1, add=True):
         ratings_descriptor.unrate(request.user)
 
     if request.is_ajax():
-        return HttpResponse('{"success": true}', mimetype='application/json')
+        data = {"success": True,
+                "score": score,
+                "count": ratings_descriptor.count(),
+                "cumulative_score": ratings_descriptor.cumulative_score(),
+                "average_score": ratings_descriptor.average_score(),
+                }
+
+        return HttpResponse(json.dumps(data), content_type='application/json')
     try:
         return HttpResponseRedirect(request.REQUEST.get('next') or
                                     request.META.get('HTTP_REFERER'))