Internal server error con votazione non esistente

[rspisser]

se si incolla da browser un id votazione non esistente, ad esempio
https://scegli.copernicani.it/vote/0

viene visualizzato un Internal Server Error.

Traceback (most recent call last):
File "/usr/local/lib/python3.6/site-packages/flask/app.py", line 2073, in wsgi_app
response = self.full_dispatch_request()
File "/usr/local/lib/python3.6/site-packages/flask/app.py", line 1518, in full_dispatch_request
rv = self.handle_user_exception(e)
File "/usr/local/lib/python3.6/site-packages/flask_cors/extension.py", line 165, in wrapped_function
return cors_after_request(app.make_response(f(*args, **kwargs)))
File "/usr/local/lib/python3.6/site-packages/flask/app.py", line 1516, in full_dispatch_request
rv = self.dispatch_request()
File "/usr/local/lib/python3.6/site-packages/flask/app.py", line 1502, in dispatch_request
return self.ensure_sync(self.view_functions[rule.endpoint])(**req.view_args)
File "/usr/local/lib/python3.6/site-packages/flask_login/utils.py", line 272, in decorated_view
return func(*args, **kwargs)
File "/app/main.py", line 348, in vote_
if votation_dao.votation_timing(v) != 0:
File "./votation_dao.py", line 179, in votation_timing
if now < vdto.begin_date:
AttributeError: 'NoneType' object has no attribute 'begin_date'