#24725: Bug in Django 1.8 Migrations (ProgrammingError: relation does not exist)
---------------------------------+------------------------
Reporter: dbrgn | Owner: nobody
Type: Bug | Status: new
Component: Migrations | Version: 1.8
Severity: Release blocker | Keywords: migrations
Triage Stage: Unreviewed | Has patch: 0
Easy pickings: 0 | UI/UX: 0
---------------------------------+------------------------
To demonstrate this bug, I created a Github repository:
https://github.com/dbrgn/django18-migration-bug You can see each step in
the commit log.
When I run the migrations for that project in a clean Postgres database, I
get an exception. You can run "reproduce.sh" to reproduce (d'oh!).
{{{
$ dropdb dj18
$ createdb dj18
$ ./manage.py migrate
Operations to perform:
Synchronize unmigrated apps: staticfiles, messages
Apply all migrations: admin, debug, contenttypes, auth, sessions
Synchronizing apps without migrations:
Creating tables...
Running deferred SQL...
Installing custom SQL...
Running migrations:
Rendering model states... DONE
Applying contenttypes.0001_initial... OK
Applying auth.0001_initial... OK
Applying admin.0001_initial... OK
Applying contenttypes.0002_remove_content_type_name... OK
Applying auth.0002_alter_permission_name_max_length... OK
Applying auth.0003_alter_user_email_max_length... OK
Applying auth.0004_alter_user_username_opts... OK
Applying auth.0005_alter_user_last_login_null... OK
Applying auth.0006_require_contenttypes_0002... OK
Applying debug.0001_initial... OK
Applying debug.0002_auto_20150429_1317...Traceback (most recent call
last):
File "./manage.py", line 10, in <module>
execute_from_command_line(sys.argv)
File "/home/danilo/.virtualenvs/django18-migration-bug/lib/python2.7
/site-packages/django/core/management/__init__.py", line 338, in
execute_from_command_line
utility.execute()
File "/home/danilo/.virtualenvs/django18-migration-bug/lib/python2.7
/site-packages/django/core/management/__init__.py", line 330, in execute
self.fetch_command(subcommand).run_from_argv(self.argv)
File "/home/danilo/.virtualenvs/django18-migration-bug/lib/python2.7
/site-packages/django/core/management/base.py", line 390, in run_from_argv
self.execute(*args, **cmd_options)
File "/home/danilo/.virtualenvs/django18-migration-bug/lib/python2.7
/site-packages/django/core/management/base.py", line 441, in execute
output = self.handle(*args, **options)
File "/home/danilo/.virtualenvs/django18-migration-bug/lib/python2.7
/site-packages/django/core/management/commands/migrate.py", line 221, in
handle
executor.migrate(targets, plan, fake=fake, fake_initial=fake_initial)
File "/home/danilo/.virtualenvs/django18-migration-bug/lib/python2.7
/site-packages/django/db/migrations/executor.py", line 110, in migrate
self.apply_migration(states[migration], migration, fake=fake,
fake_initial=fake_initial)
File "/home/danilo/.virtualenvs/django18-migration-bug/lib/python2.7
/site-packages/django/db/migrations/executor.py", line 147, in
apply_migration
state = migration.apply(state, schema_editor)
File "/home/danilo/.virtualenvs/django18-migration-bug/lib/python2.7
/site-packages/django/db/migrations/migration.py", line 115, in apply
operation.database_forwards(self.app_label, schema_editor, old_state,
project_state)
File "/home/danilo/.virtualenvs/django18-migration-bug/lib/python2.7
/site-packages/django/db/migrations/operations/models.py", line 217, in
database_forwards
to_field,
File "/home/danilo/.virtualenvs/django18-migration-bug/lib/python2.7
/site-packages/django/db/backends/base/schema.py", line 469, in
alter_field
return self._alter_many_to_many(model, old_field, new_field, strict)
File "/home/danilo/.virtualenvs/django18-migration-bug/lib/python2.7
/site-packages/django/db/backends/base/schema.py", line 780, in
_alter_many_to_many
new_field.rel.through._meta.get_field(new_field.m2m_reverse_field_name()),
File "/home/danilo/.virtualenvs/django18-migration-bug/lib/python2.7
/site-packages/django/db/backends/base/schema.py", line 484, in
alter_field
old_db_params, new_db_params, strict)
File "/home/danilo/.virtualenvs/django18-migration-bug/lib/python2.7
/site-packages/django/db/backends/base/schema.py", line 715, in
_alter_field
self.execute(self._create_fk_sql(model, new_field,
"_fk_%(to_table)s_%(to_column)s"))
File "/home/danilo/.virtualenvs/django18-migration-bug/lib/python2.7
/site-packages/django/db/backends/base/schema.py", line 107, in execute
cursor.execute(sql, params)
File "/home/danilo/.virtualenvs/django18-migration-bug/lib/python2.7
/site-packages/django/db/backends/utils.py", line 79, in execute
return super(CursorDebugWrapper, self).execute(sql, params)
File "/home/danilo/.virtualenvs/django18-migration-bug/lib/python2.7
/site-packages/django/db/backends/utils.py", line 64, in execute
return self.cursor.execute(sql, params)
File "/home/danilo/.virtualenvs/django18-migration-bug/lib/python2.7
/site-packages/django/db/utils.py", line 97, in __exit__
six.reraise(dj_exc_type, dj_exc_value, traceback)
File "/home/danilo/.virtualenvs/django18-migration-bug/lib/python2.7
/site-packages/django/db/backends/utils.py", line 64, in execute
return self.cursor.execute(sql, params)
django.db.utils.ProgrammingError: relation "debug_spam" does not exist
}}}
This only happens in Django 1.8, with 1.7.7 the migrations run fine.
--
Ticket URL: <https://code.djangoproject.com/ticket/24725>
Django <https://code.djangoproject.com/>
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