#24524: Automatic migrations prevent creation of initial database table layout
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Reporter: SimonSteinberger | Owner: nobody
Type: | Status: closed
Cleanup/optimization |
Component: Migrations | Version: 1.8rc1
Severity: Normal | Resolution:
| worksforme
Keywords: migrations, fail, | Triage Stage:
collision | Unreviewed
Has patch: 0 | Needs documentation: 1
Needs tests: 0 | Patch needs improvement: 0
Easy pickings: 0 | UI/UX: 0
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Comment (by jbrendel):
Hello charettes,
I tried to find you on the Django IRC channel, but it looks like we keep
missing each other there.
I use version 0.7.28 of `social_auth`. And, yes, it does come with
migrations. I confirmed that they were installed by pip. However, those
seems to be migrations of the wrong kind (south?), so they are not
recognized.
Your comments, however, allows me to narrow my search, so I was finally
able to find a solution that someone had posted on StackOverflow:
[http://stackoverflow.com/a/33562236]
In short: Find the original migrations that django-social-auth came with.
Delete them. Then run `python manage.py makemigrations social_auth`. This
will replace the original migrations with 'the right kind' of migrations.
When you then run `python manage.py migrate` everything works as
advertised.
So, I guess the real problem is that django-social-auth does not yet come
by default with the correct kind of migrations, which could be used by
Django 1.8 and up.
A secondary problem, however, is that Django (when you run migrate) does
not provide any illuminating warnings. I'm wondering whether it could
include a check for old-style migrations, so that it can print a helpful
error message?
Interestingly, you can do `python manage.py makemigrations social_auth`
right after the `pip install...` and it will create a `0001_initial`
migration, effectively overwriting the old `0001_initial` migration that
`django-social-auth` came with. Unfortunately, there is a second migration
(`0002_...`), which is also an old-style south migration. It remains in
place and untouched by `makemigrations`. So, when I then do `python
manage.py migrate` Django still complains with
`django.db.migrations.loader.BadMigrationError: Migrated app 'social_auth'
contains South migrations. Make sure all numbered South migrations are
deleted prior to creating Django migrations.`
That's why the contents of the migration directory that comes with
`django-social-auth` needs to be deleted at first.
I'm lucky, because I don't need to actually migrate old databases, I can
start from scratch, but I could imagine that this could cause some issues
for people that do need to migrate actual databases.
--
Ticket URL: <https://code.djangoproject.com/ticket/24524#comment:20>
Django <https://code.djangoproject.com/>
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