Opened 10 years ago

Last modified 10 years ago

#23160 closed Bug

KeyError when performing a RenameModel migration operation for a model with self-referential FK field — at Version 1

Reported by: whitews@… Owned by: Simon Charette
Component: Migrations Version: 1.7-rc-2
Severity: Release blocker Keywords:
Cc: Triage Stage: Ready for checkin
Has patch: yes Needs documentation: no
Needs tests: no Patch needs improvement: no
Easy pickings: no UI/UX: no

Description (last modified by Simon Charette)

I'm simply trying to rename a model which has a relationship to itself. Running the RenameModel operation yields the following traceback:

$ python manage.py migrate myapp
Operations to perform:
  Apply all migrations: myapp
Running migrations:
  Applying myapp.0002_rename_Foo_to_Bar...Traceback (most recent call last):
  File "manage.py", line 10, in <module>
    execute_from_command_line(sys.argv)
  File "/usr/local/lib/python2.7/dist-packages/Django-1.7c2-py2.7.egg/django/core/management/__init__.py", line 385, in execute_from_command_line
    utility.execute()
  File "/usr/local/lib/python2.7/dist-packages/Django-1.7c2-py2.7.egg/django/core/management/__init__.py", line 377, in execute
    self.fetch_command(subcommand).run_from_argv(self.argv)
  File "/usr/local/lib/python2.7/dist-packages/Django-1.7c2-py2.7.egg/django/core/management/base.py", line 288, in run_from_argv
    self.execute(*args, **options.__dict__)
  File "/usr/local/lib/python2.7/dist-packages/Django-1.7c2-py2.7.egg/django/core/management/base.py", line 338, in execute
    output = self.handle(*args, **options)
  File "/usr/local/lib/python2.7/dist-packages/Django-1.7c2-py2.7.egg/django/core/management/commands/migrate.py", line 160, in handle
    executor.migrate(targets, plan, fake=options.get("fake", False))
  File "/usr/local/lib/python2.7/dist-packages/Django-1.7c2-py2.7.egg/django/db/migrations/executor.py", line 63, in migrate
    self.apply_migration(migration, fake=fake)
  File "/usr/local/lib/python2.7/dist-packages/Django-1.7c2-py2.7.egg/django/db/migrations/executor.py", line 91, in apply_migration
    if self.detect_soft_applied(migration):
  File "/usr/local/lib/python2.7/dist-packages/Django-1.7c2-py2.7.egg/django/db/migrations/executor.py", line 134, in detect_soft_applied
    project_state = self.loader.project_state((migration.app_label, migration.name), at_end=True)
  File "/usr/local/lib/python2.7/dist-packages/Django-1.7c2-py2.7.egg/django/db/migrations/loader.py", line 268, in project_state
    return self.graph.make_state(nodes=nodes, at_end=at_end, real_apps=list(self.unmigrated_apps))
  File "/usr/local/lib/python2.7/dist-packages/Django-1.7c2-py2.7.egg/django/db/migrations/graph.py", line 147, in make_state
    project_state = self.nodes[node].mutate_state(project_state)
  File "/usr/local/lib/python2.7/dist-packages/Django-1.7c2-py2.7.egg/django/db/migrations/migration.py", line 76, in mutate_state
    operation.state_forwards(self.app_label, new_state)
  File "/usr/local/lib/python2.7/dist-packages/Django-1.7c2-py2.7.egg/django/db/migrations/operations/models.py", line 132, in state_forwards
    for name, field in state.models[related_key].fields:
KeyError: ('myapp', 'foo')

Change History (4)

by whitews@…, 10 years ago

Attachment: models_before.py​ added

initial models before renaming

by whitews@…, 10 years ago

Attachment: models_after.py​ added

models.py after renaming model

by whitews@…, 10 years ago

Attachment: 0002_rename_Foo_to_Bar.py​ added

migration file to rename model

comment:1 by Simon Charette, 10 years ago

Description: modified (diff)
Owner: changed from nobody to Simon Charette
Severity: Normal → Release blocker
Status: new → assigned

Reproduced against master.

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