从南方迁移到 django 1.8 引发 table 已经存在

Question

我在 django 1.6 上有一个项目运行，正在努力将其升级到 1.8，其中包括从南迁移到 django 的迁移。

我尝试按照 django 文档中提到的步骤，了解如何在此处更新从南方到 django 的迁移 https://docs.djangoproject.com/en/1.8/topics/migrations/#upgrading-from-south

& 在尝试迁移时遇到问题 --initial-fake，似乎即使存在一些表，django 迁移也在尝试创建它们

./manage.py migrate --fake-initial 


Running migrations:
  Rendering model states... DONE
  Applying retail.0001_initial... FAKED
  Applying contenttypes.0001_initial... FAKED
  Applying contenttypes.0002_remove_content_type_name... OK
  Applying auth.0001_initial... FAKED
  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 account.0001_initial... FAKED
  Applying default.0001_initial...Traceback (most recent call last):
  File "./manage.py", line 11, in <module>
    execute_from_command_line(sys.argv)
  File "/project-path/lib/python2.7/site-packages/django/core/management/__init__.py", line 338, in execute_from_command_line
    utility.execute()
  File "/project-path/lib/python2.7/site-packages/django/core/management/__init__.py", line 330, in execute
    self.fetch_command(subcommand).run_from_argv(self.argv)
  File "/project-path/lib/python2.7/site-packages/django/core/management/base.py", line 393, in run_from_argv
    self.execute(*args, **cmd_options)
  File "/project-path/lib/python2.7/site-packages/django/core/management/base.py", line 444, in execute
    output = self.handle(*args, **options)
  File "/project-path/lib/python2.7/site-packages/django/core/management/commands/migrate.py", line 222, in handle
    executor.migrate(targets, plan, fake=fake, fake_initial=fake_initial)
  File "/project-path/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 "/project-path/lib/python2.7/site-packages/django/db/migrations/executor.py", line 148, in apply_migration
    state = migration.apply(state, schema_editor)
  File "/project-path/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 "/project-path/lib/python2.7/site-packages/django/db/migrations/operations/models.py", line 59, in database_forwards
    schema_editor.create_model(model)
  File "/project-path/lib/python2.7/site-packages/django/db/backends/base/schema.py", line 286, in create_model
    self.execute(sql, params or None)
  File "/project-path/lib/python2.7/site-packages/django/db/backends/base/schema.py", line 111, in execute
    cursor.execute(sql, params)
  File "/project-path/lib/python2.7/site-packages/django/db/backends/utils.py", line 79, in execute
    return super(CursorDebugWrapper, self).execute(sql, params)
  File "/project-path/lib/python2.7/site-packages/django/db/backends/utils.py", line 64, in execute
    return self.cursor.execute(sql, params)
  File "/project-path/lib/python2.7/site-packages/django/db/utils.py", line 97, in __exit__
    six.reraise(dj_exc_type, dj_exc_value, traceback)
  File "/project-path/lib/python2.7/site-packages/django/db/backends/utils.py", line 62, in execute
    return self.cursor.execute(sql)
django.db.utils.ProgrammingError: relation "social_auth_association" already exists

有什么建议吗？

问候，

Answer 1

来自文档：

唯一的麻烦是如果你有一个外键的循环依赖循环；在这种情况下，makemigrations 可能会进行多个初始迁移，您需要将它们全部标记为已应用：

python manage.py migrate --fake yourappnamehere

所以尝试运行

python manage.py migrate --fake default

它应该可以解决问题。

Answer 2

输入python manage.py migrate --help

--fake         Mark migrations as run without actually running them.

--fake-initial Detect if tables already exist and fake-apply initial
               migrations if so. Make sure that the current database
               schema matches your initial migration before using
               this flag. Django will only check for an existing
               table name.

从南方迁移到 django 1.8 引发 table 已经存在

Migrating from south to django 1.8 raises table already exists

django

django-migrations