问题
I've been having lots of problems with South, I just can't add new fields.
So this is what I did:
- dropped the south_migrationhistory table from the database, deleted all the migration folders and uninstalled south "pip uninstall south".
- then, installed south again.
- ran syncdb to create the south table on the db.
- converted_to_south the app where I want to add the fields. (everything working fine till this point)
- ran schemamigration app --auto. And it gave me the regular message "+added field ... you can now apply this migration with .manage.py migrate app"
- did "python manage.py migrate app".
Get this error:
ProgrammingError: column "profile_image" of relation "profiles_profiles" already exists. (the new fields I want to add are called "nickname" and "profile_image", the app name is called "profiles" and the model is called "profiles" as well).
I think I'm doing exactly what the docs write.
What I have tried:
deleting everything and starting again a couple of times.
faking a migration and then running "migrate" again. (I get "nothing to migrate", and then the same error "relation already exists")
来源：https://stackoverflow.com/questions/25020732/django-south-cant-migrate-field-relation-already-exists