Opened 2 years ago

Closed 2 years ago

Last modified 2 years ago

#34020 closed Uncategorized (invalid)

django core management error

Reported by: brian-methodical Owned by: nobody
Component: Uncategorized Version: 4.0
Severity: Normal Keywords:
Cc: Triage Stage: Unreviewed
Has patch: no Needs documentation: no
Needs tests: no Patch needs improvement: no
Easy pickings: no UI/UX: no

Description

When running custom admin management command getting unexpected error "

'NoneType' object has no attribute 'endswith'

Here is the stack-trace:

`

Traceback (most recent call last):
  File "/Users/brianray/GitHub/methodical-feature-space/fserve/./manage.py", line 21, in <module>
    main()
  File "/Users/brianray/GitHub/methodical-feature-space/fserve/./manage.py", line 17, in main
    execute_from_command_line(sys.argv)
  File "/opt/anaconda3/lib/python3.9/site-packages/django/core/management/__init__.py", line 446, in execute_from_command_line
    utility.execute()
  File "/opt/anaconda3/lib/python3.9/site-packages/django/core/management/__init__.py", line 440, in execute
    self.fetch_command(subcommand).run_from_argv(self.argv)
  File "/opt/anaconda3/lib/python3.9/site-packages/django/core/management/base.py", line 414, in run_from_argv
    self.execute(*args, **cmd_options)
  File "/opt/anaconda3/lib/python3.9/site-packages/django/core/management/base.py", line 460, in execute
    output = self.handle(*args, **options)
  File "/Users/brianray/GitHub/methodical-feature-space/fserve/ftasks/management/commands/dumpurls.py", line 15, in handle
    self.stdout.write(pprint.pprint(urls))
  File "/opt/anaconda3/lib/python3.9/site-packages/django/core/management/base.py", line 169, in write
    if ending and not msg.endswith(ending):
AttributeError: 'NoneType' object has no attribute 'endswith'

`

To reproduce take this code:

`

from django.core.management.base import BaseCommand
from django.urls import get_resolver
import pprint

class Command(BaseCommand):
    help = 'dumps all the endpoint urls'


    def handle(self, *args, **options):
        urls = {pat.name: str(pat.pattern._route) for pat in get_resolver().url_patterns 
                if getattr(pat, "name", None)}

        self.stdout.write(self.style.SUCCESS('Here are the urls: \n\n'))

        self.stdout.write(pprint.pprint(urls))
        self.stdout.write("\n")
        return True

`

put into {BASE}/{module}/management/commands ...

Django==4.0.5

Change History (1)

comment:1 by Simon Charette, 2 years ago

Resolution: invalid
Status: newclosed

Traceback clearly points at the self.stdout.write(pprint.pprint(urls)) call being the origin of the issue.

pprint.pprint returns None, self.stdout.write expects a string, and the error messages clears state 'NoneType' object has no attribute 'endswith'.

Please avoid using this ticket tracker unless you have confirmed this is an issue with Django through TicketClosingReasons/UseSupportChannels.

Last edited 2 years ago by Simon Charette (previous) (diff)
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