title: Django South schemamigration error AttributeError: 'Options' object has no attribute 'index_together'
body: <p>I am working on a Django web app with south for db migration. I am quite new to south, and django as well. I tried using south with the official tutorials, however it failed with an exception: <strong>AttributeError: 'Options' object has no attribute 'index_together'</strong>.
  I run the south command like this:</p>
  
  <pre><code>python manage.py schemamigration southtut --initial  
  </code></pre>
  
  <p>The southtut models is this:  </p>
  
  <pre><code>class Knight(models.Model):
      name = models.CharField(max_length=100)
      of_the_round_table = models.BooleanField()
  </code></pre>
  
  <p>My project models is this:  </p>
  
  <pre><code>class Author(models.Model):
      name = models.CharField(max_length=64)
      authorId = models.CharField(max_length=32)
  
      def __unicode__(self):
          return self.name
  
      class Meta:
          db_table="Author"   
  
  class Video(models.Model):
      videoId = models.CharField(max_length=32)
      videoUrl = models.URLField(max_length=200)
      author = models.ForeignKey(Author, null=True, related_name="videos", on_delete=models.SET_NULL)
  
      class Meta:
          db_table="Video"
  
  class User(models.Model):
      token = models.CharField(max_length=50, null=True)
      favs = models.ManyToManyField(Video, related_name="fans", db_table="VideoUserR")
  
      class Meta:
          db_table = "User"
  </code></pre>
  
  <p>The whole error message I got is as below:  </p>
  
  <pre><code>    Traceback (most recent call last):
    File "manage.py", line 10, in &lt;module&gt;
      execute_from_command_line(sys.argv)
    File "/Library/Python/2.7/site-packages/django/core/management/__init__.py", line 443, in execute_from_command_line
      utility.execute()
    File "/Library/Python/2.7/site-packages/django/core/management/__init__.py", line 382, in execute
      self.fetch_command(subcommand).run_from_argv(self.argv)
    File "/Library/Python/2.7/site-packages/django/core/management/base.py", line 196, in run_from_argv
      self.execute(*args, **options.__dict__)
    File "/Library/Python/2.7/site-packages/django/core/management/base.py", line 232, in execute
      output = self.handle(*args, **options)
    File "/Library/Python/2.7/site-packages/South-0.7.6-py2.7.egg/south/management/commands/schemamigration.py", line 151, in handle
      for action_name, params in change_source.get_changes():
    File "/Library/Python/2.7/site-packages/South-0.7.6-py2.7.egg/south/creator/changes.py", line 460, in get_changes
      model_defs = freeze_apps([self.migrations.app_label()])
    File "/Library/Python/2.7/site-packages/South-0.7.6-py2.7.egg/south/creator/freezer.py", line 37, in freeze_apps
      model_defs[model_key(model)] = prep_for_freeze(model)
    File "/Library/Python/2.7/site-packages/South-0.7.6-py2.7.egg/south/creator/freezer.py", line 78, in prep_for_freeze
      fields['Meta'] = remove_useless_meta(modelsinspector.get_model_meta(model))
    File "/Library/Python/2.7/site-packages/South-0.7.6-py2.7.egg/south/modelsinspector.py", line 441, in get_model_meta
      meta_def[kwd] = get_value(model._meta, defn)
    File "/Library/Python/2.7/site-packages/South-0.7.6-py2.7.egg/south/modelsinspector.py", line 258, in get_value
      value = get_attribute(field, attrname)
    File "/Library/Python/2.7/site-packages/South-0.7.6-py2.7.egg/south/utils/__init__.py", line 38, in get_attribute
      value = getattr(value, part)
  AttributeError: 'Options' object has no attribute 'index_together'  
  </code></pre>
  
  <p>Thanks</p>