[Django] #26937: 'NoneType' object has no attribute '_meta' in manage.py dumpdata auth.user

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Django

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Jul 22, 2016, 6:21:37 PM7/22/16
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#26937: 'NoneType' object has no attribute '_meta' in manage.py dumpdata auth.user
-------------------------------+--------------------
Reporter: Adys | Owner: nobody
Type: Bug | Status: new
Component: Uncategorized | Version: 1.10
Severity: Normal | Keywords:
Triage Stage: Unreviewed | Has patch: 0
Easy pickings: 0 | UI/UX: 0
-------------------------------+--------------------
In 1.10rc1 I get the following when running `./manage.py dumpdata
auth.user --traceback`::

{{{
[Traceback (most recent call last):
File "./manage.py", line 11, in <module>
execute_from_command_line(sys.argv)
File "/home/adys/.local/share/virtualenvs/hs/lib/python3.5/site-
packages/django/core/management/__init__.py", line 367, in
execute_from_command_line
utility.execute()
File "/home/adys/.local/share/virtualenvs/hs/lib/python3.5/site-
packages/django/core/management/__init__.py", line 359, in execute
self.fetch_command(subcommand).run_from_argv(self.argv)
File "/home/adys/.local/share/virtualenvs/hs/lib/python3.5/site-
packages/django/core/management/base.py", line 305, in run_from_argv
self.execute(*args, **cmd_options)
File "/home/adys/.local/share/virtualenvs/hs/lib/python3.5/site-
packages/django/core/management/base.py", line 356, in execute
output = self.handle(*args, **options)
File "/home/adys/.local/share/virtualenvs/hs/lib/python3.5/site-
packages/django/core/management/commands/dumpdata.py", line 200, in handle
object_count=object_count,
File "/home/adys/.local/share/virtualenvs/hs/lib/python3.5/site-
packages/django/core/serializers/__init__.py", line 129, in serialize
s.serialize(queryset, **options)
File "/home/adys/.local/share/virtualenvs/hs/lib/python3.5/site-
packages/django/core/serializers/base.py", line 79, in serialize
for count, obj in enumerate(queryset, start=1):
File "/home/adys/.local/share/virtualenvs/hs/lib/python3.5/site-
packages/django/core/management/commands/dumpdata.py", line 161, in
get_objects
models = serializers.sort_dependencies(app_list.items())
File "/home/adys/.local/share/virtualenvs/hs/lib/python3.5/site-
packages/django/core/serializers/__init__.py", line 195, in
sort_dependencies
if field.remote_field.through._meta.auto_created:
AttributeError: 'NoneType' object has no attribute '_meta'
}}}

For reference, here is my user model:
https://github.com/HearthSim/HSReplay.net/blob/51c269f2cc329d859df70705e2181666d443434c/hsreplaynet/accounts/models.py#L26-L36

--
Ticket URL: <https://code.djangoproject.com/ticket/26937>
Django <https://code.djangoproject.com/>
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Django

unread,
Jul 25, 2016, 11:16:11 AM7/25/16
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#26937: 'NoneType' object has no attribute '_meta' in manage.py dumpdata auth.user
-------------------------------+--------------------------------------

Reporter: Adys | Owner: nobody
Type: Bug | Status: new
Component: Uncategorized | Version: 1.10
Severity: Normal | Resolution:
Keywords: | Triage Stage: Unreviewed
Has patch: 0 | Needs documentation: 0
Needs tests: 0 | Patch needs improvement: 0

Easy pickings: 0 | UI/UX: 0
-------------------------------+--------------------------------------
Changes (by timgraham):

* needs_better_patch: => 0
* needs_tests: => 0
* needs_docs: => 0


Comment:

Can you try to put together a minimal sample project to reproduce the
crash and [https://docs.djangoproject.com/en/dev//internals/contributing
/triaging-tickets/#bisecting-a-regression bisect] to determine where the
behavior changed?

--
Ticket URL: <https://code.djangoproject.com/ticket/26937#comment:1>

Django

unread,
Jul 27, 2016, 5:44:05 PM7/27/16
to django-...@googlegroups.com
#26937: 'NoneType' object has no attribute '_meta' in manage.py dumpdata auth.user
-------------------------------+--------------------------------------
Reporter: Adys | Owner: nobody
Type: Bug | Status: closed
Component: Uncategorized | Version: 1.10
Severity: Normal | Resolution: needsinfo
Keywords: | Triage Stage: Unreviewed

Has patch: 0 | Needs documentation: 0
Needs tests: 0 | Patch needs improvement: 0

Easy pickings: 0 | UI/UX: 0
-------------------------------+--------------------------------------
Changes (by timgraham):

* status: new => closed
* resolution: => needsinfo


Comment:

Sorry, but the project you provide is too complex and I'm spending too
much time trying to debug this. Reopen if you can put together a more
minimal project that reproduces the problem and hopefully also bisect to
find the commit where things changed. Thanks!

--
Ticket URL: <https://code.djangoproject.com/ticket/26937#comment:2>

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