Question

我正在使用mysql。在我的本地机器上我有3次迁移，在服务器上我有近9次。我将我的代码+迁移推送到github。把它拉到服务器上。

使用./manage.py migrate appname

它不起作用。然后我尝试了--merge旗帜。它也没用！我是dbms的新手。需要帮忙。此处00008_merge_models是使用文档中提供的./manage.py schemamigration appname --empty merge_models的空迁移。

- Soft matched migration 0008 to 0008_merge_models.
Running migrations for appname:
 - Migrating forwards to 0008_merge_models.
 > appname:0002_auto__add_field_student_cv__add_field_student_status__chg_field_studen
FATAL ERROR - The following SQL query failed: ALTER TABLE `appname_student` ADD COLUMN `cv` varchar(100) NOT NULL DEFAULT '';
The error was: (1060, "Duplicate column name 'cv'")
 ! 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 `appname_student` DROP COLUMN `cv` CASCADE; []
   - no dry run output for delete_foreign_key() due to dynamic DDL, sorry
   = ALTER TABLE `appname_student` DROP COLUMN `status` CASCADE; []
   = DROP TABLE `appname_student_companyapplications` CASCADE; []
   = DROP TABLE `appname_student_placedat` CASCADE; []
   - no dry run output for alter_column() due to dynamic DDL, sorry
   - no dry run output for delete_foreign_key() due to dynamic DDL, sorry
   = ALTER TABLE `appname_job` DROP COLUMN `createdon` CASCADE; []
   - no dry run output for alter_column() due to dynamic DDL, sorry
   - no dry run output for alter_column() due to dynamic DDL, sorry
   - no dry run output for alter_column() due to dynamic DDL, sorry

 ! 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: appname:0002_auto__add_field_student_cv__add_field_student_status__chg_field_studen
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/core/management/__init__.py", line 399, in execute_from_command_line
    utility.execute()
  File "/usr/local/lib/python2.7/dist-packages/django/core/management/__init__.py", line 392, in execute
    self.fetch_command(subcommand).run_from_argv(self.argv)
  File "/usr/local/lib/python2.7/dist-packages/django/core/management/base.py", line 242, in run_from_argv
    self.execute(*args, **options.__dict__)
  File "/usr/local/lib/python2.7/dist-packages/django/core/management/base.py", line 285, in execute
    output = self.handle(*args, **options)
  File "/usr/local/lib/python2.7/dist-packages/south/management/commands/migrate.py", line 111, in handle
    ignore_ghosts = ignore_ghosts,
  File "/usr/local/lib/python2.7/dist-packages/south/migration/__init__.py", line 220, in migrate_app
    success = migrator.migrate_many(target, workplan, database)
  File "/usr/local/lib/python2.7/dist-packages/south/migration/migrators.py", line 254, in migrate_many
    result = migrator.__class__.migrate_many(migrator, target, migrations, database)
  File "/usr/local/lib/python2.7/dist-packages/south/migration/migrators.py", line 329, in migrate_many
    result = self.migrate(migration, database)
  File "/usr/local/lib/python2.7/dist-packages/south/migration/migrators.py", line 133, in migrate
    result = self.run(migration, database)
  File "/usr/local/lib/python2.7/dist-packages/south/migration/migrators.py", line 114, in run
    return self.run_migration(migration, database)
  File "/usr/local/lib/python2.7/dist-packages/south/migration/migrators.py", line 84, in run_migration
    migration_function()
  File "/usr/local/lib/python2.7/dist-packages/south/migration/migrators.py", line 60, in <lambda>
    return (lambda: direction(orm))
  File "/home/byld/placement/placement/appname/migrations/0002_auto__add_field_student_cv__add_field_student_status__chg_field_studen.py", line 14, in forwards
    keep_default=False)
  File "/usr/local/lib/python2.7/dist-packages/south/db/generic.py", line 47, in _cache_clear
    return func(self, table, *args, **opts)
  File "/usr/local/lib/python2.7/dist-packages/south/db/generic.py", line 418, in add_column
    self.execute(sql)
  File "/usr/local/lib/python2.7/dist-packages/south/db/generic.py", line 282, in execute
    cursor.execute(sql, params)
  File "/usr/local/lib/python2.7/dist-packages/django/db/backends/util.py", line 69, in execute
    return super(CursorDebugWrapper, self).execute(sql, params)
  File "/usr/local/lib/python2.7/dist-packages/django/db/backends/util.py", line 53, in execute
    return self.cursor.execute(sql, params)
  File "/usr/local/lib/python2.7/dist-packages/django/db/utils.py", line 99, in __exit__
    six.reraise(dj_exc_type, dj_exc_value, traceback)
  File "/usr/local/lib/python2.7/dist-packages/django/db/backends/util.py", line 53, in execute
    return self.cursor.execute(sql, params)
  File "/usr/local/lib/python2.7/dist-packages/django/db/backends/mysql/base.py", line 124, in execute
    return self.cursor.execute(query, args)
  File "/usr/local/lib/python2.7/dist-packages/MySQLdb/cursors.py", line 205, in execute
    self.errorhandler(self, exc, value)
  File "/usr/local/lib/python2.7/dist-packages/MySQLdb/connections.py", line 36, in defaulterrorhandler
    raise errorclass, errorvalue
django.db.utils.OperationalError: (1060, "Duplicate column name 'cv'")

Answer 1

它在您的服务器上运行的原因是，您的本地计算机上可能有不同的数据库......

我建议检查您的服务器数据库中的内容以及models.py中的内容。当models.py中的代码与您的数据库相同时，您可以从服务器中删除所有迁移。而不仅仅是再次使用南方。

python manage.py schemamigration app --initial python manage.py migrate app

在南方迁移有问题

1 个答案: