I'm migrating James Bennett's 'Cotrane' blog app (adding a 'modified' date field) using South on the existing app (with data already present). These are the steps, and the traceback. Posting here because the exact same error (in this post's title) also appears in Django and Dmigrations bug reports e.g.:
Django - Trying to filter an instance of EmptyQuerySet? (apparently fixed Jan 2010): http://code.djangoproject.com/ticket/7235 Dmigrations: http://code.google.com/p/dmigrations/issues/detail?id=17 Version: Django (1, 2, 1, 'final', 0) --- 1. Add 'south' to installed apps 2. ./manage.py syncdb Syncing... Creating table south_migrationhistory Synced: > django.contrib.auth [...] > cms.search > coltrane > tagging > south [...] 3. ./manage.py convert_to_south coltrane Creating migrations directory at '/Users/[myuser]/django-apps/ coltrane/ migrations'... Creating __init__.py in '/Users/[myuser]/django-apps/coltrane/ migrations'... + Added model coltrane.Category + Added model coltrane.Entry + Added M2M table for categories on coltrane.Entry Created 0001_initial.py. You can now apply this migration with: ./ manage.py migrate coltrane - Soft matched migration 0001 to 0001_initial. Running migrations for coltrane: - Migrating forwards to 0001_initial. > coltrane:0001_initial (faked) Traceback (most recent call last): File "./manage.py", line 11, in <module> execute_manager(settings) File "[...]django-trunk/django/core/management/__init__.py", line 438, in execute_manager utility.execute() File "[...]django-trunk/django/core/management/__init__.py", line 379, in execute self.fetch_command(subcommand).run_from_argv(self.argv) File "[...]django-trunk/django/core/management/base.py", line 191, in run_from_argv self.execute(*args, **options.__dict__) File "[...]django-trunk/django/core/management/base.py", line 220, in execute output = self.handle(*args, **options) File "/Library/Frameworks/Python.framework/Versions/2.6/lib/ python2.6/site-packages/South-0.7.1-py2.6.egg/south/management/ commands/convert_to_south.py", line 74, in handle management.call_command("migrate", app, "0001", fake=True, verbosity=verbosity) File "[...]django-trunk/django/core/management/__init__.py", line 166, in call_command return klass.execute(*args, **defaults) File "[...]django-trunk/django/core/management/base.py", line 220, in execute output = self.handle(*args, **options) File "/Library/Frameworks/Python.framework/Versions/2.6/lib/ python2.6/site-packages/South-0.7.1-py2.6.egg/south/management/ commands/migrate.py", line 109, in handle ignore_ghosts = ignore_ghosts, File "/Library/Frameworks/Python.framework/Versions/2.6/lib/ python2.6/site-packages/South-0.7.1-py2.6.egg/south/migration/ __init__.py", line 205, in migrate_app post_migrate.send(None, app=app_label) File "[...]django-trunk/django/dispatch/dispatcher.py", line 162, in send response = receiver(signal=self, sender=sender, **named) File "/Library/Frameworks/Python.framework/Versions/2.6/lib/ python2.6/site-packages/South-0.7.1-py2.6.egg/south/signals.py", line 22, in create_permissions_compat create_permissions(get_app(app), (), 0) File "[...]django-trunk/django/contrib/auth/management/__init__.py", line 25, in create_permissions ctype = ContentType.objects.get_for_model(klass) File "[...]django-trunk/django/contrib/contenttypes/models.py", line 40, in get_for_model self._add_to_cache(self.db, ct) File "[...]django-trunk/django/contrib/contenttypes/models.py", line 70, in _add_to_cache key = (model._meta.app_label, model._meta.object_name.lower()) AttributeError: 'NoneType' object has no attribute '_meta' --- -- You received this message because you are subscribed to the Google Groups "Django users" group. To post to this group, send email to django-us...@googlegroups.com. To unsubscribe from this group, send email to django-users+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/django-users?hl=en.
