gistfile1.py

class VoteHandler(webapp.RequestHandler):
            
    def get(self):
        #See if logged in
        self.Session = Session()
        if not 'userkey' in self.Session:
            doRender(
                self,
                'base/index.html',
                {'error' : 'Please login to vote'})
            return
              
        #If user hasn't voted - if user doesn't have a vote on that image object
        key = self.request.get('photo_id')
        vurl = models.Image.get_by_id(int(key))
        
        #pull current site vote total & add 1

        existing_vote = models.Vote.all().filter('user=', self.Session['userkey']).filter('photo=', vurl)
    
        if existing_vote != 0:
            self.redirect('/', { })
        else:    
            newvote = models.Vote(user=self.Session['userkey'], url=vurl)
            vurl.votes += 1
            vurl.put()
            logging.info('Adding a vote')
  
            #Create a new Vote object
            newvote = models.Vote(user=self.Session['userkey'], url=vurl)
            newvote.put()    
            self.redirect('/', { })