如何添加新模型并使用 South 0.7.2 生成迁移？

Question

我创建了一个新模型：

class RssFeed(models.Model):  
  url = mdels.CharField(max_length=300)  

$ python manage.py schemamigration forum --add-model RssFeed

  Traceback (most recent call last):
    File "manage.py", line 13, in <module>
      execute_manager(settings)
    File "/usr/local/lib/python2.7/site-packages/Django-1.2.3-py2.7.egg/django/core/management/__init__.py", line 438, in execute_manager
      utility.execute()
    File "/usr/local/lib/python2.7/site-packages/Django-1.2.3-py2.7.egg/django/core/management/__init__.py", line 379, in execute
      self.fetch_command(subcommand).run_from_argv(self.argv)
    File "/usr/local/lib/python2.7/site-packages/Django-1.2.3-py2.7.egg/django/core/management/base.py", line 191, in run_from_argv
      self.execute(*args, **options.__dict__)
    File "/usr/local/lib/python2.7/site-packages/Django-1.2.3-py2.7.egg/django/core/management/base.py", line 220, in execute
      output = self.handle(*args, **options)
    File "/usr/local/lib/python2.7/site-packages/South-0.7.2-py2.7.egg/south/management/commands/schemamigration.py", line 134, in handle
      for action_name, params in change_source.get_changes():
    File "/usr/local/lib/python2.7/site-packages/South-0.7.2-py2.7.egg/south/creator/changes.py", line 397, in get_changes
      real_fields, meta, m2m_fields = self.split_model_def(model, model_defs[model_key(model)])
    File "/usr/local/lib/python2.7/site-packages/South-0.7.2-py2.7.egg/south/creator/freezer.py", line 58, in model_key
      return "%s.%s" % (model._meta.app_label, model._meta.object_name.lower())
  AttributeError: 'NoneType' object has no attribute '_meta'

Answer 1

我的语法是正确的，但我创建模型的方式却不正确。

我已将所有模型放入目录 /models

如果执行此操作，则必须将 Meta 添加到模型定义中：

class Meta:  
   app_label = 'APP_NAME'

如果不执行此操作，Django 将无法发现新模型。