我确实尝试过 T Stone 概述的解决方案，虽然我认为它是一个极好的开端并解释了应该如何做的事情，但我遇到了一些问题。
我认为大多数情况下您不再需要为父类创建表条目，即您不需要
new_movie.videofile_ptr = orm['media.VideoFile'].objects.create()
了。Django 现在会自动为您执行此操作（如果您有非空字段，那么上面的内容对我不起作用并给了我一个数据库错误）。
我认为这可能是由于 django 和 south 的变化，这是一个适用于 ubuntu 10.10 和 django 1.2.3 和 south 0.7.1 的版本。模型有点不同，但你会明白要点：
初始设置
post1/models.py：
class Author(models.Model):
first = models.CharField(max_length=30)
last = models.CharField(max_length=30)
class Tag(models.Model):
name = models.CharField(max_length=30, primary_key=True)
class Post(models.Model):
created_on = models.DateTimeField()
author = models.ForeignKey(Author)
tags = models.ManyToManyField(Tag)
title = models.CharField(max_length=128, blank=True)
content = models.TextField(blank=True)
post2/models.py：
class Author(models.Model):
first = models.CharField(max_length=30)
middle = models.CharField(max_length=30)
last = models.CharField(max_length=30)
class Tag(models.Model):
name = models.CharField(max_length=30)
class Category(models.Model):
name = models.CharField(max_length=30)
class Post(models.Model):
created_on = models.DateTimeField()
author = models.ForeignKey(Author)
tags = models.ManyToManyField(Tag)
title = models.CharField(max_length=128, blank=True)
content = models.TextField(blank=True)
extra_content = models.TextField(blank=True)
category = models.ForeignKey(Category)
显然有很多重叠，所以我想将共性分解到一个通用的后期模型中，只保留其他模型类中的差异。
新设置：
genpost/models.py：
class Author(models.Model):
first = models.CharField(max_length=30)
middle = models.CharField(max_length=30, blank=True)
last = models.CharField(max_length=30)
class Tag(models.Model):
name = models.CharField(max_length=30, primary_key=True)
class Post(models.Model):
created_on = models.DateTimeField()
author = models.ForeignKey(Author)
tags = models.ManyToManyField(Tag)
title = models.CharField(max_length=128, blank=True)
content = models.TextField(blank=True)
post1/models.py：
import genpost.models as gp
class SimplePost(gp.Post):
class Meta:
proxy = True
post2/models.py：
import genpost.models as gp
class Category(models.Model):
name = models.CharField(max_length=30)
class ExtPost(gp.Post):
extra_content = models.TextField(blank=True)
category = models.ForeignKey(Category)
如果您想跟随，您首先需要将这些模型带到南方：
$./manage.py schemamigration post1 --initial
$./manage.py schemamigration post2 --initial
$./manage.py migrate
迁移数据
怎么办？首先编写新应用程序 genpost 并使用 south 进行初始迁移：
$./manage.py schemamigration genpost --initial
（我$用来表示 shell 提示，所以不要输入。）
接下来分别在 post1/models.py 和 post2/models.py 中创建新类SimplePost和ExtPost（不要删除其余类）。然后也为这两个创建模式迁移：
$./manage.py schemamigration post1 --auto
$./manage.py schemamigration post2 --auto
现在我们可以应用所有这些迁移：
$./manage.py migrate
让我们进入问题的核心，将数据从 post1 和 post2 迁移到 genpost：
$./manage.py datamigration genpost post1_and_post2_to_genpost --freeze post1 --freeze post2
然后编辑 genpost/migrations/0002_post1_and_post2_to_genpost.py：
class Migration(DataMigration):
def forwards(self, orm):
#
# Migrate common data into the new genpost models
#
for auth1 in orm['post1.author'].objects.all():
new_auth = orm.Author()
new_auth.first = auth1.first
new_auth.last = auth1.last
new_auth.save()
for auth2 in orm['post2.author'].objects.all():
new_auth = orm.Author()
new_auth.first = auth2.first
new_auth.middle = auth2.middle
new_auth.last = auth2.last
new_auth.save()
for tag in orm['post1.tag'].objects.all():
new_tag = orm.Tag()
new_tag.name = tag.name
new_tag.save()
for tag in orm['post2.tag'].objects.all():
new_tag = orm.Tag()
new_tag.name = tag.name
new_tag.save()
for post1 in orm['post1.post'].objects.all():
new_genpost = orm.Post()
# Content
new_genpost.created_on = post1.created_on
new_genpost.title = post1.title
new_genpost.content = post1.content
# Foreign keys
new_genpost.author = orm['genpost.author'].objects.filter(\
first=post1.author.first,last=post1.author.last)[0]
new_genpost.save() # Needed for M2M updates
for tag in post1.tags.all():
new_genpost.tags.add(\
orm['genpost.tag'].objects.get(name=tag.name))
new_genpost.save()
post1.delete()
for post2 in orm['post2.post'].objects.all():
new_extpost = p2.ExtPost()
new_extpost.created_on = post2.created_on
new_extpost.title = post2.title
new_extpost.content = post2.content
# Foreign keys
new_extpost.author_id = orm['genpost.author'].objects.filter(\
first=post2.author.first,\
middle=post2.author.middle,\
last=post2.author.last)[0].id
new_extpost.extra_content = post2.extra_content
new_extpost.category_id = post2.category_id
# M2M fields
new_extpost.save()
for tag in post2.tags.all():
new_extpost.tags.add(tag.name) # name is primary key
new_extpost.save()
post2.delete()
# Get rid of author and tags in post1 and post2
orm['post1.author'].objects.all().delete()
orm['post1.tag'].objects.all().delete()
orm['post2.author'].objects.all().delete()
orm['post2.tag'].objects.all().delete()
def backwards(self, orm):
raise RuntimeError("No backwards.")
现在应用这些迁移：
$./manage.py migrate
接下来，您可以从 post1/models.py 和 post2/models.py 中删除现在冗余的部分，然后创建 schemamigrations 以将表更新为新状态：
$./manage.py schemamigration post1 --auto
$./manage.py schemamigration post2 --auto
$./manage.py migrate
应该就是这样！希望一切正常，并且您已经重构了模型。