Error creating new content types. Please make sure contenttypes is migrated before trying to migrate apps individually

Question

I am trying to migrate from Django 1.6 to Django 1.8. I was using South for managing migrations in Django 1.6. I have successfully created new migration files by python manage.py makemigrations. while running python manage.py migrate --fake-initial, I am getting this error

 Traceback (most recent call last):
  File "manage.py", line 39, in <module>
    execute_from_command_line(sys.argv)
  File "/home/jonty/.virtualenvs/squadrun/local/lib/python2.7/site-    packages/django/core/management/__init__.py", line 338, in   execute_from_command_line
    utility.execute()
  File "/home/jonty/.virtualenvs/squadrun/local/lib/python2.7/site-  packages/django/core/management/__init__.py", line 330, in execute
    self.fetch_command(subcommand).run_from_argv(self.argv)
  File "/home/jonty/.virtualenvs/squadrun/local/lib/python2.7/site-packages/django/core/management/base.py", line 390, in run_from_argv
    self.execute(*args, **cmd_options)
  File "/home/jonty/.virtualenvs/squadrun/local/lib/python2.7/site-packages/django/core/management/base.py", line 441, in execute
    output = self.handle(*args, **options)
  File "/home/jonty/.virtualenvs/squadrun/local/lib/python2.7/site-packages/django/core/management/commands/migrate.py", line 225, in handle
    emit_post_migrate_signal(created_models, self.verbosity, self.interactive, connection.alias)
  File "/home/jonty/.virtualenvs/squadrun/local/lib/python2.7/site-packages/django/core/management/sql.py", line 280, in emit_post_migrate_signal
using=db)
  File "/home/jonty/.virtualenvs/squadrun/local/lib/python2.7/site-packages/django/dispatch/dispatcher.py", line 201, in send
response = receiver(signal=self, sender=sender, **named)
  File "/home/jonty/.virtualenvs/squadrun/local/lib/python2.7/site-packages/django/contrib/auth/management/__init__.py", line 82, in create_permissions
    ctype = ContentType.objects.db_manager(using).get_for_model(klass)
  File "/home/jonty/.virtualenvs/squadrun/local/lib/python2.7/site-packages/django/contrib/contenttypes/models.py", line 78, in get_for_model
    "Error creating new content types. Please make sure contenttypes "

One of the migration file 0001_initial.py says:

dependencies = [
    ('auth', '0006_require_contenttypes_0002'),
    ('clients', '0002_auto_20150428_1551'),
    ('players', '0001_initial'),
]

which I guess is particularly the problem. What could be the workaround this problem. Any help will be appreciated.

Storekeeper

The dependency on auth 0006 should ensure that contenttypes is migrated before the post migration signal is run. What's the error if you manually run ContentType.objects.get(app_label=<app label>, model_name=<model name>)? – Deus

ContentType matching query does not exist – Storekeeper

And with get_or_create()? – Deus

Answer 1

I think this has something to do with "The removal of ContentType.name", according to this. But somehow it doesnt work.

By manually removing the column name from 'django_content_type' table. Eg.

'ALTER TABLE django_content_type DROP COLUMN name'

I was able to apply the migrations. Maybe this can get you a little bit further at least.

Zweig

I was able to make this work by completly deleting the table django_content_type and running the migration. Yeah and it's because the name has been removed in Django 1.8. – Storekeeper

Another option, create a temporary database, do a syncdb etc., then copy the django_content_type table into the problem database. – Rickettsia

There is django/contrib/contenttypes/migrations/0002_remove_content_type_name.py in Django 1.8. Didn't check when it was added. – Froe

@Storekeeper Interestingly, I dropped the table as well and yet the error persists. :/ – Mythos

Answer 2

Try to migrate auth application first, and then others:

manage.py migrate auth
manage.py migrate <app_name>

Kavita

@Stryker I'm so glad to hear that :) – Kavita

Answer 3

In my case, what i did to fix this was updating to a newer version of django. If you work with mac just do:

1. pip install django --upgrade
2. python manage.py makemigrations
3. python manage.py migrate

Vanpelt

Answer 4

May look strange but I fixed this by upgrading to Django version 1.8. Initially i was using ver 1.7

Pleven

Upgrading to a newer version did solve my problem. Thanks! – Hoax

Answer 5

To add to comment by @int_ua Add this as a dependency to the migration that is failing:

dependencies = [
    ('contenttypes', '0002_remove_content_type_name'),
]

Then run migration again.

Heavyarmed

Answer 6

I had to merge two systems in Django 1.9.1 and I just could not get past this error:

 "Error creating new content types. Please make sure contenttypes "

Extensive googling and stackoverflowing was fruitless. Finally, I added the the debug line to

~/.virtualenvs/(venv_name)/lib/python2.7/site-packages/django/contrib/contenttypes/models.py

 except (OperationalError, ProgrammingError, IntegrityError):
        # It's possible to migrate a single app before contenttypes,
        # as it's not a required initial dependency (it's contrib!)
        # Have a nice error for this.
        print "\n\nError for Content type model "+opts.model_name+"\n\n"
        raise RuntimeError(
            "Error creating new content types. Please make sure contenttypes "
            "is migrated before trying to migrate apps individually."
        )

This told me the model names that were causing the error and ultimately led to the fix.

I am using Postgres and the sequence numbers for tables django_content_type and auth_permission were not pointing to the end of the table, causing inserts to fail.

These 2 lines fixed that (based on this SO post)

SELECT pg_catalog.setval(pg_get_serial_sequence('django_content_type', 'id'), (SELECT MAX(id) FROM django_content_type)+1);
SELECT pg_catalog.setval(pg_get_serial_sequence('auth_permission', 'id'), (SELECT MAX(id) FROM auth_permission)+1);

Ganoid