Re: python manage.py commonds: AttributeError: 'PosixPath' object has no attribute 'startswith'

This error is being triggered by an outdated and badly behaved module that contains the run_cmdb_worker management command.

Anything that relies on the presence of BASE_DIR in settings is bad behaviour. This is an entirely arbitrary variable name that might not even be present in a non-default configuration, and it effectively a "private" variable.

There are better ways to determine the Django base directory (although reliance on same is also questionable as it probably assumes a specific Django layout, which is also poor behaviour).

If you insist on using it, then simply wrap BASE_DIR def with a str() cast, or use .as_posix() member, i.e.

BASE_DIR = str(Path(__file__).resolve().parent.parent)

This may invalidate other uses in your settings module though, for example:

BASE_DIR / 'someothervalue'

If your change does not trigger an error otherwise, then you are probably fine.

Regards,

David

On Mon, Apr 24, 2023 at 2:21 AM DL <clouddebuger@gmail.com> wrote:

Django 4.2
Python 3.10.10

# python manage.py run_cmdb_worker
Traceback (most recent call last):
  File "/usr/local/python/lib/python3.10/pkgutil.py", line 417, in get_importer
    importer = sys.path_importer_cache[path_item]
KeyError: PosixPath('/www/cloudadmin')

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/www/cloudadmin/manage.py", line 22, in <module>
    main()
  File "/www/cloudadmin/manage.py", line 18, in main
    execute_from_command_line(sys.argv)
  File "/opt/.pyvenv/lib/python3.10/site-packages/django/core/management/__init__.py", line 442, in execute_from_command_line
    utility.execute()
  File "/opt/.pyvenv/lib/python3.10/site-packages/django/core/management/__init__.py", line 436, in execute
    self.fetch_command(subcommand).run_from_argv(self.argv)
  File "/opt/.pyvenv/lib/python3.10/site-packages/django/core/management/__init__.py", line 275, in fetch_command
    klass = load_command_class(app_name, subcommand)
  File "/opt/.pyvenv/lib/python3.10/site-packages/django/core/management/__init__.py", line 48, in load_command_class
    module = import_module("%s.management.commands.%s" % (app_name, name))
  File "/usr/local/python/lib/python3.10/importlib/__init__.py", line 126, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
  File "<frozen importlib._bootstrap>", line 1050, in _gcd_import
  File "<frozen importlib._bootstrap>", line 1027, in _find_and_load
  File "<frozen importlib._bootstrap>", line 1006, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 688, in _load_unlocked
  File "<frozen importlib._bootstrap_external>", line 883, in exec_module
  File "<frozen importlib._bootstrap>", line 241, in _call_with_frames_removed
  File "/www/cloudadmin/apps/cmdb/management/commands/run_cmdb_worker.py", line 2, in <module>
    from cmdb.scheduler import Scheduler
  File "/www/cloudadmin/apps/cmdb/scheduler.py", line 3, in <module>
    from apscheduler.schedulers.background import BackgroundScheduler
  File "/opt/.pyvenv/lib/python3.10/site-packages/apscheduler/__init__.py", line 1, in <module>
    from pkg_resources import get_distribution, DistributionNotFound
  File "/opt/.pyvenv/lib/python3.10/site-packages/pkg_resources/__init__.py", line 3260, in <module>
    def _initialize_master_working_set():
  File "/opt/.pyvenv/lib/python3.10/site-packages/pkg_resources/__init__.py", line 3234, in _call_aside
    f(*args, **kwargs)
  File "/opt/.pyvenv/lib/python3.10/site-packages/pkg_resources/__init__.py", line 3272, in _initialize_master_working_set
    working_set = WorkingSet._build_master()
  File "/opt/.pyvenv/lib/python3.10/site-packages/pkg_resources/__init__.py", line 572, in _build_master
    ws = cls()
  File "/opt/.pyvenv/lib/python3.10/site-packages/pkg_resources/__init__.py", line 565, in __init__
    self.add_entry(entry)
  File "/opt/.pyvenv/lib/python3.10/site-packages/pkg_resources/__init__.py", line 621, in add_entry
    for dist in find_distributions(entry, True):
  File "/opt/.pyvenv/lib/python3.10/site-packages/pkg_resources/__init__.py", line 1988, in find_distributions
    importer = get_importer(path_item)
  File "/usr/local/python/lib/python3.10/pkgutil.py", line 421, in get_importer
    importer = path_hook(path_item)
  File "<frozen importlib._bootstrap_external>", line 1632, in path_hook_for_FileFinder
  File "<frozen importlib._bootstrap_external>", line 1504, in __init__
  File "<frozen importlib._bootstrap_external>", line 182, in _path_isabs
AttributeError: 'PosixPath' object has no attribute 'startswith'

I must midify settings.py, change BASE_DIR, it can run
# BASE_DIR = Path(__file__).resolve().parent.parent 
BASE_DIR = os.path.dirname(os.path.dirname(os.path.abspath(__file__))

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