Django - Change a ForeignKey relation to OneToOne

Question

I am using South with my Django app. I have two models that I am changing from having a ForeignKey relation to having a OneToOneField relation. When I

Answer 1

First thing I would try would be to add a db.delete_unique(...) in various places to see if I could hack it.

Failing that, I'd split it up into 3 migrations:

1. a schema migration to add a new column for the OneToOne
2. a data migration to copy all FK values from old column over to new
3. a schema migration to remove the old column, which then I'd edit manually to include a command to rename the new column to the same as the old one.