#23494: Makemigrations fails with python3
----------------------------+---------------------
Reporter: rumpelsepp | Owner: nobody
Type: Bug | Status: new
Component: Migrations | Version: 1.7
Severity: Normal | Keywords: python3
Triage Stage: Unreviewed | Has patch: 0
Easy pickings: 0 | UI/UX: 0
----------------------------+---------------------
Hi,
makemigrations very often fails under python3 with the following
traceback:
{{{
$ python manage.py makemigrations
Traceback (most recent call last):
File "manage.py", line 10, in <module>
execute_from_command_line(sys.argv)
File "/home/stefan/.virtualenvs/python3/lib/python3.4/site-
packages/django/core/management/__init__.py", line 385, in
execute_from_command_line
utility.execute()
File "/home/stefan/.virtualenvs/python3/lib/python3.4/site-
packages/django/core/management/__init__.py", line 377, in execute
self.fetch_command(subcommand).run_from_argv(self.argv)
File "/home/stefan/.virtualenvs/python3/lib/python3.4/site-
packages/django/core/management/base.py", line 288, in run_from_argv
self.execute(*args, **options.__dict__)
File "/home/stefan/.virtualenvs/python3/lib/python3.4/site-
packages/django/core/management/base.py", line 338, in execute
output = self.handle(*args, **options)
File "/home/stefan/.virtualenvs/python3/lib/python3.4/site-
packages/django/core/management/commands/makemigrations.py", line 111, in
handle
convert_apps=app_labels or None,
File "/home/stefan/.virtualenvs/python3/lib/python3.4/site-
packages/django/db/migrations/autodetector.py", line 40, in changes
changes = self._detect_changes(convert_apps, graph)
File "/home/stefan/.virtualenvs/python3/lib/python3.4/site-
packages/django/db/migrations/autodetector.py", line 107, in
_detect_changes
self.old_apps = self.from_state.render(ignore_swappable=True)
File "/home/stefan/.virtualenvs/python3/lib/python3.4/site-
packages/django/db/migrations/state.py", line 67, in render
model.render(self.apps)
File "/home/stefan/.virtualenvs/python3/lib/python3.4/site-
packages/django/db/migrations/state.py", line 311, in render
body,
File "/home/stefan/.virtualenvs/python3/lib/python3.4/site-
packages/django/db/models/base.py", line 171, in __new__
new_class.add_to_class(obj_name, obj)
File "/home/stefan/.virtualenvs/python3/lib/python3.4/site-
packages/django/db/models/base.py", line 300, in add_to_class
value.contribute_to_class(cls, name)
File "/home/stefan/.virtualenvs/python3/lib/python3.4/site-
packages/django/db/models/fields/related.py", line 1572, in
contribute_to_class
super(ForeignObject, self).contribute_to_class(cls, name,
virtual_only=virtual_only)
File "/home/stefan/.virtualenvs/python3/lib/python3.4/site-
packages/django/db/models/fields/related.py", line 264, in
contribute_to_class
'app_label': cls._meta.app_label.lower()
TypeError: unsupported operand type(s) for %: 'bytes' and 'dict'
}}}
Using python2 instead fixes the problem. I use Django 1.7 from pip.
--
Ticket URL: <https://code.djangoproject.com/ticket/23494>
Django <https://code.djangoproject.com/>
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