在South中添加列会出错

时间：2015-07-13 00:42:06

标签： django django-models django-south

我在Django模型中添加了几个列和字段，并能够运行South命令，例如：

$ python manage.py schemamigration [model_name] --auto
$ python manage.py migrate

在本地计算机上运行正常，没有任何错误。但是，当我切换到服务器时，将所有新的迁移+代码文件和内容都拉到那里并执行此操作：

$ python manage.py migrate

它在下面粘贴了以下错误。我使用版本MySQL 5.6（与InnoDB），如果这将是一个有用的信息。我已经尝试过在线查看和Stackoverflow找出如何解决这个问题（例如，this post非常接近帮助我理解这个问题，但并不完全是我面临的问题......），但我似乎无法找到解决方案。

我现在应该尝试成功进行迁移？

[root@server: t4s (develop)]$ python manage.py migrate
Running migrations for accounts:
 - Migrating forwards to 0012_auto__add_timelimit.
 > accounts:0005_auto__add_twilioaccount
 > accounts:0006_auto__add_field_twilioaccount_created_at__add_field_twilioaccount_crea
 > accounts:0007_auto__del_twilioaccount
 > accounts:0008_auto__add_twilioaccount
 > accounts:0009_auto__chg_field_twilioaccount_created_by__add_unique_twilioaccount_cre
 > accounts:0010_auto__del_twilioaccount
 > accounts:0011_auto__add_twilioaccount
 > accounts:0012_auto__add_timelimit
 - Loading initial data for accounts.
Installed 0 object(s) from 0 fixture(s)
Running migrations for smsmessages:
- Nothing to migrate.
 - Loading initial data for smsmessages.
Installed 0 object(s) from 0 fixture(s)
Running migrations for organizations:
- Nothing to migrate.
 - Loading initial data for organizations.
Installed 0 object(s) from 0 fixture(s)
Running migrations for campaigns:
 - Migrating forwards to 0003_auto__add_field_taskqueue_twilio.
 > campaigns:0003_auto__add_field_taskqueue_twilio
 ! 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:   - no dry run output for delete_foreign_key() due to dynamic DDL, sorry
   = ALTER TABLE `campaigns_taskqueue` DROP COLUMN `twilio_id` CASCADE; []

 ! The South developers regret this has happened, and would
 ! like to gently persuade you to consider a slightly
 ! easier-to-deal-with DBMS (one that supports DDL transactions)
 ! NOTE: The error which caused the migration to fail is further up.
Error in migration: campaigns:0003_auto__add_field_taskqueue_twilio
Traceback (most recent call last):
  File "manage.py", line 10, in <module>
    execute_from_command_line(sys.argv)
  File "/usr/lib/python2.6/site-packages/django/core/management/__init__.py", line 399, in execute_from_command_line
    utility.execute()
  File "/usr/lib/python2.6/site-packages/django/core/management/__init__.py", line 392, in execute
    self.fetch_command(subcommand).run_from_argv(self.argv)
  File "/usr/lib/python2.6/site-packages/django/core/management/base.py", line 242, in run_from_argv
    self.execute(*args, **options.__dict__)
  File "/usr/lib/python2.6/site-packages/django/core/management/base.py", line 285, in execute
    output = self.handle(*args, **options)
  File "/usr/lib64/python2.6/site-packages/south/management/commands/migrate.py", line 111, in handle
    ignore_ghosts = ignore_ghosts,
  File "/usr/lib64/python2.6/site-packages/south/migration/__init__.py", line 220, in migrate_app
    success = migrator.migrate_many(target, workplan, database)
  File "/usr/lib64/python2.6/site-packages/south/migration/migrators.py", line 254, in migrate_many
    result = migrator.__class__.migrate_many(migrator, target, migrations, database)
  File "/usr/lib64/python2.6/site-packages/south/migration/migrators.py", line 329, in migrate_many
    result = self.migrate(migration, database)
  File "/usr/lib64/python2.6/site-packages/south/migration/migrators.py", line 133, in migrate
    result = self.run(migration, database)
  File "/usr/lib64/python2.6/site-packages/south/migration/migrators.py", line 114, in run
    return self.run_migration(migration, database)
  File "/usr/lib64/python2.6/site-packages/south/migration/migrators.py", line 8
    migration_function()
  File "/usr/lib64/python2.6/site-packages/south/migration/migrators.py", line 6
    return (lambda: direction(orm))
  File "/opt/dev/t4sfeature/t4sdev/t4s/campaigns/migrations/0003_auto__add_field
    keep_default=False)
  File "/usr/lib64/python2.6/site-packages/south/db/generic.py", line 47, in _ca
    return func(self, table, *args, **opts)
  File "/usr/lib64/python2.6/site-packages/south/db/generic.py", line 418, in ad
    self.execute(sql)
  File "/usr/lib64/python2.6/site-packages/south/db/generic.py", line 282, in ex
    cursor.execute(sql, params)
  File "/usr/lib/python2.6/site-packages/django/db/backends/util.py", line 69, i
    return super(CursorDebugWrapper, self).execute(sql, params)
  File "/usr/lib/python2.6/site-packages/django/db/backends/util.py", line 53, i
    return self.cursor.execute(sql, params)
  File "/usr/lib/python2.6/site-packages/django/db/backends/mysql/base.py", line
    return self.cursor.execute(query, args)
  File "/usr/lib64/python2.6/site-packages/MySQLdb/cursors.py", line 175, in exe
    if not self._defer_warnings: self._warning_check()
  File "/usr/lib64/python2.6/site-packages/MySQLdb/cursors.py", line 89, in _war
    warn(w[-1], self.Warning, 3)
_mysql_exceptions.Warning: TIME/TIMESTAMP/DATETIME columns of old format have been upgraded

当我再次尝试运行python manage.py migrate时，我得到的错误略有不同，如下所示。

[root@server: t4s (develop)]$ python manage.py migrate
Running migrations for accounts:
- Nothing to migrate.
 - Loading initial data for accounts.
Installed 0 object(s) from 0 fixture(s)
Running migrations for smsmessages:
- Nothing to migrate.
 - Loading initial data for smsmessages.
Installed 0 object(s) from 0 fixture(s)
Running migrations for organizations:
- Nothing to migrate.
 - Loading initial data for organizations.
Installed 0 object(s) from 0 fixture(s)
Running migrations for campaigns:
 - Migrating forwards to 0003_auto__add_field_taskqueue_twilio.
 > campaigns:0003_auto__add_field_taskqueue_twilio
FATAL ERROR - The following SQL query failed: ALTER TABLE `campaigns_taskqueue` ADD COLUMN `twilio_id` integer NULL;
The error was: (1060, "Duplicate column name 'twilio_id'")
 ! 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:   - no dry run output for delete_foreign_key() due to dynamic DDL, sorry
   = ALTER TABLE `campaigns_taskqueue` DROP COLUMN `twilio_id` CASCADE; []

 ! The South developers regret this has happened, and would
 ! like to gently persuade you to consider a slightly
 ! easier-to-deal-with DBMS (one that supports DDL transactions)
 ! NOTE: The error which caused the migration to fail is further up.
Error in migration: campaigns:0003_auto__add_field_taskqueue_twilio
Traceback (most recent call last):
  File "manage.py", line 10, in <module>
    execute_from_command_line(sys.argv)
  File "/usr/lib/python2.6/site-packages/django/core/management/__init__.py", line 399, in execute_from_command_line
    utility.execute()
  File "/usr/lib/python2.6/site-packages/django/core/management/__init__.py", line 392, in execute
    self.fetch_command(subcommand).run_from_argv(self.argv)
  File "/usr/lib/python2.6/site-packages/django/core/management/base.py", line 242, in run_from_argv
    self.execute(*args, **options.__dict__)
  File "/usr/lib/python2.6/site-packages/django/core/management/base.py", line 285, in execute
    output = self.handle(*args, **options)
  File "/usr/lib64/python2.6/site-packages/south/management/commands/migrate.py", line 111, in handle
    ignore_ghosts = ignore_ghosts,
  File "/usr/lib64/python2.6/site-packages/south/migration/__init__.py", line 220, in migrate_app
    success = migrator.migrate_many(target, workplan, database)
  File "/usr/lib64/python2.6/site-packages/south/migration/migrators.py", line 254, in migrate_many
    result = migrator.__class__.migrate_many(migrator, target, migrations, database)
  File "/usr/lib64/python2.6/site-packages/south/migration/migrators.py", line 329, in migrate_many
    result = self.migrate(migration, database)
  File "/usr/lib64/python2.6/site-packages/south/migration/migrators.py", line 133, in migrate
    result = self.run(migration, database)
  File "/usr/lib64/python2.6/site-packages/south/migration/migrators.py", line 114, in run
    return self.run_migration(migration, database)
  File "/usr/lib64/python2.6/site-packages/south/migration/migrators.py", line 84, in run_migration
    migration_function()
  File "/usr/lib64/python2.6/site-packages/south/migration/migrators.py", line 60, in <lambda>
    return (lambda: direction(orm))
  File "/opt/dev/t4sfeature/t4sdev/t4s/campaigns/migrations/0003_auto__add_field
    keep_default=False)
  File "/usr/lib64/python2.6/site-packages/south/db/generic.py", line 47, in _ca
    return func(self, table, *args, **opts)
  File "/usr/lib64/python2.6/site-packages/south/db/generic.py", line 418, in ad
    self.execute(sql)
  File "/usr/lib64/python2.6/site-packages/south/db/generic.py", line 282, in ex
    cursor.execute(sql, params)
  File "/usr/lib/python2.6/site-packages/django/db/backends/util.py", line 69, i
    return super(CursorDebugWrapper, self).execute(sql, params)
  File "/usr/lib/python2.6/site-packages/django/db/backends/util.py", line 53, i
    return self.cursor.execute(sql, params)
  File "/usr/lib/python2.6/site-packages/django/db/utils.py", line 99, in __exit
    six.reraise(dj_exc_type, dj_exc_value, traceback)
  File "/usr/lib/python2.6/site-packages/django/db/backends/util.py", line 53, i
    return self.cursor.execute(sql, params)
  File "/usr/lib/python2.6/site-packages/django/db/backends/mysql/base.py", line
    return self.cursor.execute(query, args)
  File "/usr/lib64/python2.6/site-packages/MySQLdb/cursors.py", line 173, in exe
    self.errorhandler(self, exc, value)
  File "/usr/lib64/python2.6/site-packages/MySQLdb/connections.py", line 36, in
    raise errorclass, errorvalue
django.db.utils.OperationalError: (1060, "Duplicate column name 'twilio_id'")

关于0003_auto__add_field_taskqueue_twilio.py模型的最新南迁移文件（名为campaigns）有：

u'campaigns.taskqueue': {
    'Meta': {'object_name': 'TaskQueue'},
    'campaign': ('django.db.models.fields.related.ForeignKey', [], {'to': u"orm['campaigns.Campaign']"}),
    'created_at': ('django.db.models.fields.DateTimeField', [], {'auto_now_add': 'True', 'blank': 'True'}),
    'created_by': ('django.db.models.fields.related.ForeignKey', [], {'to': u"orm['auth.User']"}),
    'groups': ('django.db.models.fields.related.ManyToManyField', [], {'to': u"orm['organizations.Group']", 'symmetrical': 'False'}),
    u'id': ('django.db.models.fields.AutoField', [], {'primary_key': 'True'}),
    'launch_time': ('django.db.models.fields.DateTimeField', [], {}),
    'status': ('django.db.models.fields.CharField', [], {'default': "'pending'", 'max_length': '30'}),
    'twilio': ('django.db.models.fields.related.ForeignKey', [], {'to': u"orm['accounts.TwilioAccount']", 'null': 'True'})
},

据我记得，我刚刚将此行添加到campaigns/models.py文件中：

class TaskQueue(models.Model):
    campaign = models.ForeignKey(Campaign)
    launch_time = models.DateTimeField()
    twilio = models.ForeignKey(TwilioAccount, null=True) # new line recently added

    created_at = models.DateTimeField(auto_now_add=True)
    created_by = models.ForeignKey(User)

和TwilioAccount模型是这样的：

class TwilioAccount(models.Model):
    name = models.CharField(max_length=50, blank=True)
    number = models.CharField(max_length=16, blank=True)
    sid = models.CharField(max_length=100, blank=True)
    token = models.CharField(max_length=100, blank=True)
    created_at = models.DateTimeField(auto_now_add=True)

非常感谢您的回答。

1 个答案:

答案 0 :(得分：0)

我找到了解决方法。我阅读了南方的迁移文件和git提交日志，并检查了我的数据库表，并意识到已经创建了一个名为twilio的列（不确定何时以及如何）。在确保一切看起来都很好之后，我使用了very useful post的建议（在上面的问题中提供）：

$ python manage.py migrate 0003 --fake

这让我跳过了迁移＃3（我不需要它，因为我已经在我的数据库中创建了twilio列）并继续编写下一步。我希望面对同样错误的人会觉得这很有用。

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