Question

在Django（1.4）中迁移South（0.7.5）时，我遇到了这个错误。我最近将时区设置更改为false，即USE_TZ = False以修复另一个问题。有任何想法吗？感谢

~/code/django/ssc/dev/ssc/ssc: python manage.py migrate crewcal
Traceback (most recent call last):
  File "manage.py", line 10, in <module>
    execute_from_command_line(sys.argv)
  File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/django/core/management/__init__.py", line 443, in execute_from_command_line
    utility.execute()
  File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/django/core/management/__init__.py", line 382, 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 196, 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 232, in execute
    output = self.handle(*args, **options)
  File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/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/migration/__init__.py", line 158, in migrate_app
    Migrations.calculate_dependencies()
  File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/south/migration/base.py", line 227, in calculate_dependencies
    migration.calculate_dependencies()
  File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/south/migration/base.py", line 355, in calculate_dependencies
    for migration in self._get_dependency_objects("depends_on"):
  File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/south/migration/base.py", line 335, in _get_dependency_objects
    for app, name in getattr(self.migration_class(), attrname, []):
  File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/south/migration/base.py", line 307, in migration_class
    return self.migration().Migration
AttributeError: 'module' object has no attribute 'Migration'
~/code/django/ssc/dev/ssc/ssc:

Answer 1

可能为时已晚，但我不认为它与TZ有任何关系。

每个迁移文件都有一个声明：

class Migration(SchemaMigration):
    ...

AttributeError来自未发现此Migration类的声明。

检查您的所有迁移是否都有这样的迁移。否则请提供更多详细信息。

Answer 2

要获得第二个Augusto Men的答案，错误实际上是南方无法在迁移模块中找到Migration的实施。它是一般Python错误消息：

AttributeError: 'module' object has no attribute 'Migration'

错误在south.migration.base中抛出，现在在第315行（版本0.8.4）

调试打印输出

不幸的是，python manage.py migrate并未告诉您哪个文件受到影响。您可以通过在<your-virtualenv>/local/lib/python*/site-packages/south/migration/base.py中的第315行上方添加以下代码来帮助自己。这将告诉您必须处理哪个文件。

print('## MODULE: %s' % str(self.migration()))

特殊情况

我有一个特殊情况，AttributeError显示migrations/<some_app>/__init__.py，通常应该只是一个空文件。我将空模型文件model.py添加到我的应用程序后，空文件停止工作，以欺骗Django查看我的应用程序的fixtures文件夹（请参阅{{3 }}）。我相信这实际上是一个南方的bug。

解决方案

如上所述，找出受影响的迁移模块，只需在该文件中添加Migration类的空实现，例如：

from south.v2 import SchemaMigration


class Migration(SchemaMigration):
    def forwards(self, orm):
        pass

    def backwards(self, orm):
        pass

Django South migration AttributeError

2 个答案:

调试打印输出

特殊情况

解决方案