def get_user_by_url(r, u):
user = User.objects(url=u).first()
raise gen.Return(user)
user = yield cache.get(r, u)
if user:
logging.debug('cache hit for {}'.format(u))
raise gen.Return(user)
else:
logging.debug('cache miss for {}'.format(u))
user = User.objects(url=u).first()
cache.send(r, user)
raise gen.Return(user)
def save(self, r=None):
if r:
cache.invalidate(r, self)
cache.send(r, self)
return super(User, self).save()
