#23226: Migrations generated by python2 break when using python3 to migrate
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Reporter: morshed.nader@… | Owner: nobody
Type: Bug | Status: new
Component: Migrations | Version: 1.7-rc-2
Severity: Release blocker | Resolution:
Keywords: | Triage Stage: Accepted
Has patch: 0 | Needs documentation: 0
Needs tests: 0 | Patch needs improvement: 0
Easy pickings: 0 | UI/UX: 0
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Changes (by charettes):
* stage: Unreviewed => Accepted
Comment:
I'm getting the following traceback on Python 3.3.1 with 1.7r2 and master.
{{{
Operations to perform:
Apply all migrations: migratemodule, admin, auth, contenttypes, sessions
Running migrations:
Applying contenttypes.0001_initial... OK
Applying auth.0001_initial... OK
Applying admin.0001_initial... OK
Applying migratemodule.0001_initial...Traceback (most recent call last):
File "/home/simon/workspace/django/django/db/models/options.py", line
414, in get_field_by_name
return self._name_map[name]
AttributeError: 'Options' object has no attribute '_name_map'
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "/home/simon/workspace/django/django/db/models/options.py", line
417, in get_field_by_name
return cache[name]
KeyError: b'season'
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "./manage.py", line 11, in <module>
execute_from_command_line(sys.argv)
File "/home/simon/workspace/django/django/core/management/__init__.py",
line 385, in execute_from_command_line
utility.execute()
File "/home/simon/workspace/django/django/core/management/__init__.py",
line 377, in execute
self.fetch_command(subcommand).run_from_argv(self.argv)
File "/home/simon/workspace/django/django/core/management/base.py", line
288, in run_from_argv
self.execute(*args, **options.__dict__)
File "/home/simon/workspace/django/django/core/management/base.py", line
337, in execute
output = self.handle(*args, **options)
File
"/home/simon/workspace/django/django/core/management/commands/migrate.py",
line 160, in handle
executor.migrate(targets, plan, fake=options.get("fake", False))
File "/home/simon/workspace/django/django/db/migrations/executor.py",
line 63, in migrate
self.apply_migration(migration, fake=fake)
File "/home/simon/workspace/django/django/db/migrations/executor.py",
line 97, in apply_migration
migration.apply(project_state, schema_editor)
File "/home/simon/workspace/django/django/db/migrations/migration.py",
line 107, in apply
operation.database_forwards(self.app_label, schema_editor,
project_state, new_state)
File
"/home/simon/workspace/django/django/db/migrations/operations/models.py",
line 241, in database_forwards
getattr(new_model._meta, self.option_name, set()),
File
"/home/simon/workspace/django/django/db/backends/sqlite3/schema.py", line
188, in alter_unique_together
self._remake_table(model, override_uniques=new_unique_together)
File
"/home/simon/workspace/django/django/db/backends/sqlite3/schema.py", line
121, in _remake_table
self.create_model(temp_model)
File "/home/simon/workspace/django/django/db/backends/schema.py", line
261, in create_model
columns = [model._meta.get_field_by_name(field)[0].column for field in
fields]
File "/home/simon/workspace/django/django/db/backends/schema.py", line
261, in <listcomp>
columns = [model._meta.get_field_by_name(field)[0].column for field in
fields]
File "/home/simon/workspace/django/django/db/models/options.py", line
420, in get_field_by_name
% (self.object_name, name))
django.db.models.fields.FieldDoesNotExist: ModelTest has no field named
b'season'
}}}
Thanks to PEP3134 it looks like it might be related to something else.
--
Ticket URL: <https://code.djangoproject.com/ticket/23226#comment:2>
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