[GitHub] JustOnce opened a new issue #4810: Can't invoke function 'get_bind', as the proxy object has not yet been established for the Alembic 'Operations' class.

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

JustOnce opened a new issue #4810: Can't invoke function 'get_bind', as the proxy object has not yet been established for the Alembic 'Operations' class.
URL: https://github.com/apache/incubator-superset/issues/4810
 
 
   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 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
   
   
   ### Superset version
   0.24.0
   
   ### Alembic version
   0.9.9
   
   ### Expected results
   List migrations branches.
   
   ### Actual results
   Error 
   
   ```
   Traceback (most recent call last):
     File "superset.py", line 15, in <module>
       manager.run()
     File "/home/justonce/virtenv/superset/local/lib/python2.7/site-packages/flask_script/__init__.py", line 417, in run
       result = self.handle(argv[0], argv[1:])
     File "/home/justonce/virtenv/superset/local/lib/python2.7/site-packages/flask_script/__init__.py", line 386, in handle
       res = handle(*args, **config)
     File "/home/justonce/virtenv/superset/local/lib/python2.7/site-packages/flask_script/commands.py", line 216, in __call__
       return self.run(*args, **kwargs)
     File "/home/justonce/virtenv/superset/local/lib/python2.7/site-packages/flask_migrate/__init__.py", line 344, in branches
       command.branches(config, verbose=verbose)
     File "/home/justonce/virtenv/superset/local/lib/python2.7/site-packages/alembic/command.py", line 421, in branches
       for sc in script.walk_revisions():
     File "/home/justonce/virtenv/superset/local/lib/python2.7/site-packages/alembic/script/base.py", line 195, in walk_revisions
       head, base, inclusive=True, assert_relative_length=False):
     File "/home/justonce/virtenv/superset/local/lib/python2.7/site-packages/alembic/script/revision.py", line 645, in _iterate_revisions
       requested_lowers = self.get_revisions(lower)
     File "/home/justonce/virtenv/superset/local/lib/python2.7/site-packages/alembic/script/revision.py", line 301, in get_revisions
       resolved_id, branch_label = self._resolve_revision_number(id_)
     File "/home/justonce/virtenv/superset/local/lib/python2.7/site-packages/alembic/script/revision.py", line 437, in _resolve_revision_number
       self._revision_map
     File "/home/justonce/virtenv/superset/local/lib/python2.7/site-packages/alembic/util/langhelpers.py", line 239, in __get__
       obj.__dict__[self.__name__] = result = self.fget(obj)
     File "/home/justonce/virtenv/superset/local/lib/python2.7/site-packages/alembic/script/revision.py", line 122, in _revision_map
       for revision in self._generator():
     File "/home/justonce/virtenv/superset/local/lib/python2.7/site-packages/alembic/script/base.py", line 99, in _load_revisions
       script = Script._from_filename(self, vers, file_)
     File "/home/justonce/virtenv/superset/local/lib/python2.7/site-packages/alembic/script/base.py", line 812, in _from_filename
       module = util.load_python_file(dir_, filename)
     File "/home/justonce/virtenv/superset/local/lib/python2.7/site-packages/alembic/util/pyfiles.py", line 81, in load_python_file
       module = load_module_py(module_id, path)
     File "/home/justonce/virtenv/superset/local/lib/python2.7/site-packages/alembic/util/compat.py", line 141, in load_module_py
       mod = imp.load_source(module_id, path, fp)
     File "/home/justonce/pycharm_projects/superset/superset/migrations/versions/f231d82b9b26_.py", line 28, in <module>
       bind = op.get_bind()
     File "<string>", line 7, in get_bind
     File "/home/justonce/virtenv/superset/local/lib/python2.7/site-packages/alembic/util/langhelpers.py", line 99, in _name_error
       name, cls.__name__
   NameError: Can't invoke function 'get_bind', as the proxy object has not yet been established for the Alembic 'Operations' class.  Try placing this code inside a callable.
   ```
   
   ### Steps to reproduce
   Call command 
   
   `$ ~/virtenv/superset/bin/python superset.py db branches`
   
   P.S. 
   Looks like promleb in file superset/migrations/versions/f231d82b9b26_.py
   There was similar bug earlier in another file https://github.com/apache/incubator-superset/pull/3948
   
   

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