FileNotFoundError: No such file or directory (static)

[paulschreiber]

Same as #1123.

I installed django-debug-toolbar. When I start my app, I get this error:
FileNotFoundError: [Errno 2] No such file or directory: '/Users/paul/.dev/police-records/static'

Here's the backtrace:

Internal Server Error: /
Traceback (most recent call last):
  File "/Users/paul/.dev/police-records/.direnv/python-3.8.5/lib/python3.8/site-packages/django/core/handlers/exception.py", line 34, in inner
    response = get_response(request)
  File "/Users/paul/.dev/police-records/.direnv/python-3.8.5/lib/python3.8/site-packages/debug_toolbar/middleware.py", line 92, in __call__
    panel.generate_stats(request, response)
  File "/Users/paul/.dev/police-records/.direnv/python-3.8.5/lib/python3.8/site-packages/debug_toolbar/panels/staticfiles.py", line 128, in generate_stats
    "staticfiles_finders": self.get_staticfiles_finders(),
  File "/Users/paul/.dev/police-records/.direnv/python-3.8.5/lib/python3.8/site-packages/debug_toolbar/panels/staticfiles.py", line 140, in get_staticfiles_finders
    for path, finder_storage in finder.list([]):
  File "/Users/paul/.dev/police-records/.direnv/python-3.8.5/lib/python3.8/site-packages/django/contrib/staticfiles/finders.py", line 130, in list
    for path in utils.get_files(storage, ignore_patterns):
  File "/Users/paul/.dev/police-records/.direnv/python-3.8.5/lib/python3.8/site-packages/django/contrib/staticfiles/utils.py", line 23, in get_files
    directories, files = storage.listdir(location)
  File "/Users/paul/.dev/police-records/.direnv/python-3.8.5/lib/python3.8/site-packages/django/core/files/storage.py", line 316, in listdir
    for entry in os.scandir(path):
FileNotFoundError: [Errno 2] No such file or directory: '/Users/paul/.dev/police-records/static'

[tim-schilling]

Does that directory exist?

[paulschreiber]

It didn't. Creating it didn't change the error.

[tim-schilling]

Odd. Give collectstatic a go, but I doubt that'll fix it. Also please include your static files settings, version of django and version of the toolbar.

[paulschreiber]

Versions:

Django==3.0.5
django-debug-toolbar==2.2

Settings:

STATIC_URL = '/static/'

STATICFILES_DIRS = [
	os.path.join(BASE_DIR, "static"),
	os.path.join(BASE_DIR, "case-manager", "public"),
	os.path.join(BASE_DIR, "case-intake", "public")
]

collectstatic initially failed because the directory didn't exist:

FileNotFoundError: [Errno 2] No such file or directory: '/Users/paul/.dev/police-records/static'

After mkdir static, I got this error:

django.core.exceptions.ImproperlyConfigured: You're using the staticfiles app without having set the STATIC_ROOT setting to a filesystem path.

I added this to settings:

STATIC_ROOT = os.path.join(BASE_DIR, "static")

I ran collectstatic again:

Found another file with the destination path 'index.html'. It will be ignored since only the first encountered file is collected. If this is not what you want, make sure every static file has a unique path.
Found another file with the destination path 'bundle.css'. It will be ignored since only the first encountered file is collected. If this is not what you want, make sure every static file has a unique path.
Found another file with the destination path 'bundle.js.map'. It will be ignored since only the first encountered file is collected. If this is not what you want, make sure every static file has a unique path.
Found another file with the destination path 'bundle.css.map'. It will be ignored since only the first encountered file is collected. If this is not what you want, make sure every static file has a unique path.
Found another file with the destination path 'bundle.js'. It will be ignored since only the first encountered file is collected. If this is not what you want, make sure every static file has a unique path.
Found another file with the destination path 'favicon.png'. It will be ignored since only the first encountered file is collected. If this is not what you want, make sure every static file has a unique path.
Found another file with the destination path 'images/loader.svg'. It will be ignored since only the first encountered file is collected. If this is not what you want, make sure every static file has a unique path.

214 static files copied to '/Users/paul/.dev/police-records/static'.

runserver now fails:

Traceback (most recent call last):
  File "/usr/local/Cellar/python@3.8/3.8.5/Frameworks/Python.framework/Versions/3.8/lib/python3.8/threading.py", line 932, in _bootstrap_inner
    self.run()
  File "/usr/local/Cellar/python@3.8/3.8.5/Frameworks/Python.framework/Versions/3.8/lib/python3.8/threading.py", line 870, in run
    self._target(*self._args, **self._kwargs)
  File "/Users/paul/.dev/police-records/.direnv/python-3.8.5/lib/python3.8/site-packages/django/utils/autoreload.py", line 53, in wrapper
    fn(*args, **kwargs)
  File "/Users/paul/.dev/police-records/.direnv/python-3.8.5/lib/python3.8/site-packages/django/core/management/commands/runserver.py", line 117, in inner_run
    self.check(display_num_errors=True)
  File "/Users/paul/.dev/police-records/.direnv/python-3.8.5/lib/python3.8/site-packages/django/core/management/base.py", line 441, in check
    raise SystemCheckError(msg)
django.core.management.base.SystemCheckError: SystemCheckError: System check identified some issues:

ERRORS:
?: (staticfiles.E002) The STATICFILES_DIRS setting should not contain the STATIC_ROOT setting.

[matthiask]

You shouldn't put non-existing folders in STATICFILES_DIRS, that's not supported by Django.

Also, since Django collects files from apps and from STATICFILES_DIRS into STATIC_ROOT, STATIC_ROOT shouldn't be in STATICFILES_DIRS. A folder shouldn't be a source and a target of static files at the same time.

[paulschreiber]

Running mkdir static and setting STATIC_ROOT = os.path.join(BASE_DIR, "staticroot")fixed the problem.

Perhaps debug toolbar can do some sort of configuration sanity check and complain if:

• a folder specified by STATICFILES_DIRS doesn't exist
• STATIC_ROOT isn't defined
• STATIC_ROOT is inside STATICFILES_DIRS

…or other similar errors that prevent debug toolbar from starting.

[matthiask]

All of these checks make sense, but it seems to me they belong into Django itself. At first sight.

[paulschreiber]

I agree in principle. However (a) My Django app ran fine with these items in their incorrect state and (b) it might be hard to (or take a long time to) convince the Django team to include this in a release.

If you don't think it's worth make changes to debug toolbar, hopefully this GitHub issue will help the next person solve the problem.

[matthiask]

Well, there certainly is a django-debug-toolbar bug to be fixed – django-debug-toolbar should still work even if other applications are configured incorrectly (and mention that staticfiles couldn't be collected, in this case)

Maybe it's even worth it adding our own warnings in specific cases. This may be such a case. I'm torn.

So: Certainly +1 on fixing the crash, -0 on adding checks for other apps. +0 for adding a check if other apps would silently ignore their misconfiguration but django-debug-toolbar doesn't / cannot.

[tim-schilling]

@matthiask for this particular case are you suggesting that we log a warning that the path specified didn't exist? Looking for clarification so I can write up a PR.

I agree that I'm hesitant to have the toolbar start acting as a config/project debugger as there's a lot of functionality that would need to be built for that. However, it could be argued that it's within the toolbar's domain.

[matthiask]

@tim-schilling Thanks for the suggestion, that should work well!

I had in mind that we'd show a note about it in the toolbar itself, but that would probably be much more work without being more useful at all (resp. even less useful, in my case the probability is bigger that I see a warning in the runserver console than somewhere inside a panel)