global name 'settings' is not defined

[s-ol]

Here: https://github.com/toxinu/leselys/blob/master/leselys/backends/storage/_mongodb.py#L31

leselys_1       | [2017-11-24 16:43:48,279] ERROR in app: Exception on /api/feed                                                                                        settings [POST]
leselys_1       | Traceback (most recent call last):
leselys_1       |   File "/usr/lib/python2.7/site-packages/flask/app.py", line 1                                                                                        982, in wsgi_app
leselys_1       |     response = self.full_dispatch_request()
leselys_1       |   File "/usr/lib/python2.7/site-packages/flask/app.py", line 1                                                                                        614, in full_dispatch_request
leselys_1       |     rv = self.handle_user_exception(e)
leselys_1       |   File "/usr/lib/python2.7/site-packages/flask/app.py", line 1                                                                                        517, in handle_user_exception
leselys_1       |     reraise(exc_type, exc_value, tb)
leselys_1       |   File "/usr/lib/python2.7/site-packages/flask/app.py", line 1                                                                                        612, in full_dispatch_request
leselys_1       |     rv = self.dispatch_request()
leselys_1       |   File "/usr/lib/python2.7/site-packages/flask/app.py", line 1                                                                                        598, in dispatch_request
leselys_1       |     return self.view_functions[rule.endpoint](**req.view_args)
leselys_1       |   File "/usr/lib/python2.7/site-packages/leselys/helpers.py",                                                                                         line 96, in decorated_function
leselys_1       |     return f(*args, **kwargs)
leselys_1       |   File "/usr/lib/python2.7/site-packages/leselys/api.py", line                                                                                         249, in change__feed_setting
leselys_1       |     storage.set_feed_setting(feed_id, key, value)
leselys_1       |   File "/usr/lib/python2.7/site-packages/leselys/backends/stor                                                                                        age/_mongodb.py", line 31, in set_feed_setting
leselys_1       |     '_id': settings['_id'],
leselys_1       | NameError: global name 'settings' is not defined