Easiest way to rename a model using Django/South?

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I"ve been hunting for an answer to this on South"s site, Google, and SO, but couldn"t find a simple way to do this.

I want to rename a Django model using South. Say you have the following:

class Foo(models.Model):
    name = models.CharField()

class FooTwo(models.Model):
    name = models.CharField()
    foo = models.ForeignKey(Foo)

and you want to convert Foo to Bar, namely

class Bar(models.Model):
    name = models.CharField()

class FooTwo(models.Model):
    name = models.CharField()
    foo = models.ForeignKey(Bar)

To keep it simple, I"m just trying to change the name from Foo to Bar, but ignore the foo member in FooTwo for now.

What"s the easiest way to do this using South?

1. I could probably do a data migration, but that seems pretty involved.
2. Write a custom migration, e.g. db.rename_table("city_citystate", "geo_citystate"), but I"m not sure how to fix the foreign key in this case.
3. An easier way that you know?

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Easiest way to rename a model using Django/South? __del__: Questions

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