When I use abort(status_code=404, detail='No such user', passthrough='json')
This exception is raised:
TypeError: 'NoneType' object is not iterable
This is the traceback:
File "/home/jugger/.virtualenvs/ave/lib/python3.5/site-packages/tg/appwrappers/identity.py", line 47, in __call__
return self.next_handler(controller, environ, context)
File "/home/jugger/.virtualenvs/ave/lib/python3.5/site-packages/tg/appwrappers/i18n.py", line 71, in __call__
return self.next_handler(controller, environ, context)
File "/home/jugger/.virtualenvs/ave/lib/python3.5/site-packages/tg/wsgiapp.py", line 285, in _dispatch
return controller(environ, context)
File "/home/jugger/workspace/web/ave/ave/lib/base.py", line 27, in __call__
return TGController.__call__(self, environ, context)
File "/home/jugger/.virtualenvs/ave/lib/python3.5/site-packages/tg/controllers/dispatcher.py", line 119, in __call__
response = self._perform_call(context)
File "/home/jugger/.virtualenvs/ave/lib/python3.5/site-packages/tg/controllers/dispatcher.py", line 108, in _perform_call
r = self._call(action, params, remainder=remainder, context=context)
File "/home/jugger/.virtualenvs/ave/lib/python3.5/site-packages/tg/controllers/decoratedcontroller.py", line 125, in _call
response = self._render_response(context, controller, output)
File "/home/jugger/.virtualenvs/ave/lib/python3.5/site-packages/tg/controllers/decoratedcontroller.py", line 220, in _render_response
for name in exclude_names:
TypeError: 'NoneType' object is not iterable
--------------------- >> end captured logging << ---------------------
This is my code:
I try to get an account that doesn't exist, so NoResultFound
is caught and as the result abort
must be done. but it raises the exception I mentioned above.
@expose('json')
def get_one(self, account_id):
"""
Get an account
:param account_id :type: str
:return Account :type: dict
"""
try:
_id = int(account_id)
except ValueError:
abort(status_code=400, detail='account_id must be int', passthrough='json')
try:
account = DBSession.query(Account).filter(Account.id == _id).one()
except NoResultFound:
abort(status_code=404, detail='No such user', passthrough='json')
return dict(
id=account.id,
username=account.username,
reputation=account.reputation,
badges=account.badges,
created=account.created,
bio=account.bio
)
That's something the authentication layer does, whenever is signaled back to the user that authentication is needed the challenger will intervene and force the user to login ( http://turbogears.readthedocs.io/en/latest/turbogears/authentication.html?highlight=challenger#how-it-works-in-turbogears )
If you want to avoid that behaviour the easiest way is to use tg.abort(401, passthrough=True)
which will skip such step, as you are talking about an API you probably want to use passthrough='json'
which will provide a JSON response. See http://turbogears.readthedocs.io/en/latest/reference/classes.html#tg.controllers.util.abort
Your response might then get caught by the ErrorPageApplicationWrapper
depending on TurboGears version in such case make sure ErrorController.document
has @expose('json')
or you will face the crash you mentioned.