append v get param to bypass local cache

likes/views.py

@@ -1,4 +1,5 @@
 from secretballot import views
+from secretballot.models import Vote
 
 def can_vote(request, content_type, object_id, vote):
     return content_type.model_class().objects.get(id=object_id).can_vote(request)[0]
@@ -9,5 +10,6 @@ def like(request, content_type, id, vote):
     if request.is_ajax():
         return views.vote(request, content_type=content_type, object_id=id, vote=vote, template_name='likes/inclusion_tags/likes.html', can_vote_test=can_vote, extra_context={'can_vote': False, 'vote_status': 'voted', "content_type": url_friendly_content_type})
     else:
-        redirect_url = request.META['HTTP_REFERER']
+        # Redirect to referer but append unique number(determined from global vote count) to end of URL to bypass local cache.
+        redirect_url = '%s?v=%s' % (request.META['HTTP_REFERER'], Vote.objects.count() + 1)
         return views.vote(request, content_type=content_type, object_id=id, vote=vote, redirect_url=redirect_url, can_vote_test=can_vote)