Adding a “through” table to django field and migrating with South?

Question

Seems like this should be \"easy\" or at least documented somewhere, I just cant find it.

Lets say I have a model:

class A(models.Model):
    users =         


        

Answer 1

As mentioned in a comment, the first step may be simplified using db.rename_table as described here, which gives this through model:

class AUsers(models.Model):
user = models.ForeignKey('auth.User')
a = models.ForeignKey('A')

class Meta:
    unique_together = (('user', 'a'),)

Then, create a migration with --auto (this way you'll have the names of the DB tables visible), and replace the content with:

class Migration(SchemaMigration):

    def forwards(self, orm):
        db.rename_table('appname_a_user', 'appname_auser')

    def backwards(self, orm):
        db.rename_table('appname_auser','appname_a_user') 

I just applied it in my project without issues.