[GitHub] [incubator-superset] LucaPrete opened a new issue #7825: Superset cannot start, reporting "AttributeError: 'NoneType' object has no attribute 'session' at startup"

[GitBox <gi...@apache.org>]

LucaPrete opened a new issue #7825: Superset cannot start, reporting "AttributeError: 'NoneType' object has no attribute 'session' at startup"
URL: https://github.com/apache/incubator-superset/issues/7825
 
 
   I'm trying both Superset 0.20.6 and 0.28.1 (need to run them as containers, downloaded from dockerhub from `https://hub.docker.com/r/amancevice/superset`). At startup, both versions throw at some point an exception with the following error: `AttributeError: 'NoneType' object has no attribute 'session'`
   
   ### Expected results
   
   Superset start with no issues.
   
   ### Actual results
   
   Superset throws the following exception. Following is what I see using the 0.20.6 version.
   
   ```
   superset    | Loaded your LOCAL configuration at [/etc/superset/superset_config.py]
   superset    | Traceback (most recent call last):
   superset    |   File "/usr/local/bin/superset", line 12, in <module>
   superset    |     from superset.cli import manager
   superset    |   File "/usr/local/lib/python3.5/dist-packages/superset/__init__.py", line 153, in <module>
   superset    |     security_manager_class=app.config.get("CUSTOM_SECURITY_MANAGER"))
   superset    |   File "/usr/local/lib/python3.5/dist-packages/flask_appbuilder/base.py", line 131, in __init__
   superset    |     self.init_app(app, session)
   superset    |   File "/usr/local/lib/python3.5/dist-packages/flask_appbuilder/base.py", line 157, in init_app
   superset    |     self._add_admin_views()
   superset    |   File "/usr/local/lib/python3.5/dist-packages/flask_appbuilder/base.py", line 254, in _add_admin_views
   superset    |     self.sm.register_views()
   superset    |   File "/usr/local/lib/python3.5/dist-packages/flask_appbuilder/security/sqla/manager.py", line 67, in register_views
   superset    |     super(SecurityManager, self).register_views()
   superset    |   File "/usr/local/lib/python3.5/dist-packages/flask_appbuilder/security/manager.py", line 443, in register_views
   superset    |     category_label=_('Security'))
   superset    |   File "/usr/local/lib/python3.5/dist-packages/flask_appbuilder/base.py", line 345, in add_view
   superset    |     baseview = self._check_and_init(baseview)
   superset    |   File "/usr/local/lib/python3.5/dist-packages/flask_appbuilder/base.py", line 294, in _check_and_init
   superset    |     if baseview.datamodel.session is None:
   superset    | AttributeError: 'NoneType' object has no attribute 'session'
   ```
   
   #### How to reproduce the bug
   
   
   
   ### Environment
   
   - superset version: `0.20.6 or 0.28.1`
   - python version: `3` (coming with docker container)
   
   ### Checklist
   
   Make sure these boxes are checked before submitting your issue - thank you!
   
   - [X] I have checked the superset logs for python stacktraces and included it here as text if there are any.
   - [X] I have reproduced the issue with at least the latest released version of superset.
   - [X] I have checked the issue tracker for the same issue and I haven't found one similar.

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