Python Django south迁移工具与现有应用程序错误

我有一个名为

auth

的现有应用程序，带有模型，并将数据库与表同步。 我在项目设置中安装

south

，运行

/manage.py convert\u to_south auth

。它成功创建并应用了假迁移。 然后我在这个应用程序中添加新的模型并运行

/manage.py schemamigration auth--auto

。当我试图通过运行

/manage.py migrate auto

迁移它时，它给了我一个巨大的错误：

 + Added model auth.RegisterTicket
Created 0002_auto__add_registerticket.py. You can now apply this migration with: ./manage.py migrate auth
nukl-MacBook:website nukl$ django migrate auth
Running migrations for auth:
 - Migrating forwards to 0002_auto__add_registerticket.
 > auth:0002_auto__add_registerticket
 ! Error found during real run of migration! Aborting.

 ! Since you have a database that does not support running
 ! schema-altering statements in transactions, we have had 
 ! to leave it in an interim state between migrations.

! You *might* be able to recover with:   = DROP TABLE `auth_registerticket` CASCADE; []

 ! The South developers regret this has happened, and would
 ! like to gently persuade you to consider a slightly
 ! easier-to-deal-with DBMS.
 ! NOTE: The error which caused the migration to fail is further up.
Traceback (most recent call last):
  File "manage.py", line 11, in <module>
    execute_manager(settings)
  File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/django/core/management/__init__.py", line 438, in execute_manager
    utility.execute()
  File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/django/core/management/__init__.py", line 379, in execute
    self.fetch_command(subcommand).run_from_argv(self.argv)
  File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/django/core/management/base.py", line 191, in run_from_argv
    self.execute(*args, **options.__dict__)
  File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/django/core/management/base.py", line 220, in execute
    output = self.handle(*args, **options)
  File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/South-0.7.3-py2.7.egg/south/management/commands/migrate.py", line 105, in handle
    ignore_ghosts = ignore_ghosts,
  File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/South-0.7.3-py2.7.egg/south/migration/__init__.py", line 191, in migrate_app
    success = migrator.migrate_many(target, workplan, database)
  File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/South-0.7.3-py2.7.egg/south/migration/migrators.py", line 221, in migrate_many
    result = migrator.__class__.migrate_many(migrator, target, migrations, database)
  File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/South-0.7.3-py2.7.egg/south/migration/migrators.py", line 292, in migrate_many
    result = self.migrate(migration, database)
  File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/South-0.7.3-py2.7.egg/south/migration/migrators.py", line 125, in migrate
    result = self.run(migration)
  File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/South-0.7.3-py2.7.egg/south/migration/migrators.py", line 99, in run
    return self.run_migration(migration)
  File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/South-0.7.3-py2.7.egg/south/migration/migrators.py", line 81, in run_migration
    migration_function()
  File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/South-0.7.3-py2.7.egg/south/migration/migrators.py", line 57, in <lambda>
    return (lambda: direction(orm))
  File "/migrations/0002_auto__add_registerticket.py", line 16, in forwards
    ('user', self.gf('django.db.models.fields.related.ForeignKey')(to=orm['auth.User'])),
  File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/South-0.7.3-py2.7.egg/south/db/generic.py", line 226, in create_table
    ', '.join([col for col in columns if col]),
  File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/South-0.7.3-py2.7.egg/south/db/generic.py", line 150, in execute
    cursor.execute(sql, params)
  File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/django/db/backends/util.py", line 15, in execute
    return self.cursor.execute(sql, params)
  File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/django/db/backends/mysql/base.py", line 86, in execute
    return self.cursor.execute(query, args)
  File "build/bdist.macosx-10.6-intel/egg/MySQLdb/cursors.py", line 174, in execute
  File "build/bdist.macosx-10.6-intel/egg/MySQLdb/connections.py", line 36, in defaulterrorhandler
_mysql_exceptions.OperationalError: (1050, "Table 'auth_registerticket' already exists")

+添加了模型验证注册表项
已创建0002\u auto\u add\u registerticket.py。现在，您可以使用：./manage.py migrate auth应用此迁移
nukl MacBook：网站nukl$django migrate auth
正在运行身份验证迁移：
-正向迁移到0002\u自动添加\u注册表项。
>认证：0002\u自动\u添加\u注册表项
! 在迁移的实际运行期间发现错误！流产。
! 因为您的数据库不支持运行
! 在事务中改变模式的语句，我们有
! 使其在迁移之间处于过渡状态。
! 您*可能*能够通过：=删除表'auth\u registerticket'级联进行恢复；[]
! 南方开发商对此感到遗憾，并将
! 喜欢温柔地劝你稍微考虑一下。
! 更容易处理DBMS。
! 注意：导致迁移失败的错误还在后面。
回溯（最近一次呼叫最后一次）：
文件“manage.py”，第11行，在
执行\u管理器（设置）
文件“/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site packages/django/core/management/__init__.py”，第438行，在execute_manager中
utility.execute（）
文件“/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site packages/django/core/management/_init___;.py”，第379行，在execute中
self.fetch_命令（子命令）。从_argv（self.argv）运行_
文件“/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/django/core/management/base.py”，第191行，运行时从_argv开始
self.execute（*args，**选项._dict__;
文件“/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site packages/django/core/management/base.py”，第220行，在execute中
输出=self.handle（*args，**选项）
文件“/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site packages/South-0.7.3-py2.7.egg/South/management/commands/migrate.py”，句柄中的第105行
忽略重影=忽略重影，
文件“/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site packages/South-0.7.3-py2.7.egg/South/migration/________.py”，第191行，在migrate_应用程序中
success=migrator.migrate\u many（目标、工作计划、数据库）
文件“/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site packages/South-0.7.3-py2.7.egg/South/migration/migrators.py”，第221行，在migrate\u中
结果=迁移器。\类\迁移\多个（迁移器、目标、迁移、数据库）
文件“/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site packages/South-0.7.3-py2.7.egg/South/migration/migrators.py”，第292行，在migrate\u中
结果=self.migrate（迁移，数据库）
文件“/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site packages/South-0.7.3-py2.7.egg/South/migration/migrators.py”，migrate中的第125行
结果=self.run（迁移）
文件“/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site packages/South-0.7.3-py2.7.egg/South/migration/migrators.py”，第99行，运行中
返回self.run\u迁移（迁移）
文件“/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site packages/South-0.7.3-py2.7.egg/South/migration/migrators.py”，第81行，运行时迁移
迁移函数（）
文件“/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site packages/South-0.7.3-py2.7.egg/South/migration/migrators.py”，第57行
返回（λ：方向（orm））
文件“/migrations/0002\u auto\u add\u registerticket.py”，第16行，向前
（'user'，self.gf（'django.db.models.fields.related.ForeignKey'）（to=orm['auth.user']），
文件“/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site packages/South-0.7.3-py2.7.egg/South/db/generic.py”，第226行，在create_表格中
“，”。联接（[col for columns in columns if col]），
文件“/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site packages/South-0.7.3-py2.7.egg/South/db/generic.py”，执行中第150行
cursor.execute（sql，params）
文件“/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site packages/django/db/backends/util.py”，执行中的第15行
返回self.cursor.execute（sql，params）
文件“/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site packages/django/db/backends/mysql/base.py”，执行中的第86行
返回self.cursor.execute（查询，参数）
文件“build/bdist.macosx-10.6-intel/egg/MySQLdb/cursors.py”，执行中第174行
文件“build/bdist.macosx-10.6-intel/egg/MySQLdb/connections.py”，第36行，在defaulterrorhandler中
_mysql_exceptions.OperationalError:（1050，“表'auth_registerticket'已存在”）

---

有什么想法吗？

看起来表

auth\u registerticket

已经存在。您是否尝试过删除它并重新应用迁移？

前几天我遇到了类似的错误。这是因为我使用的是MySQL，迁移的forwards（）部分没有在MySQL上的事务中运行。这导致我出现了一个问题，我无法通过先向下再向上迁移来修复它，因为south_migrationhistory表没有注册我最近的迁移

---

为了解决这个问题，我运行了migrate with--fake以更新迁移历史记录。然后，我不得不将try/except与我最新迁移中处理索引的内容打包，并能够前后运行。

以上是说明。你试过了吗？什么说明？如何删除已创建的表？