Django South migration error

Question

I am getting an error trying to apply a first South migration. I have tried various suggestions (like removing .pyc files in the migrations folder, converting the app as well as trying to start it afresh, other fiddles). Can anyone here suggest what I might do? Thanks

(env)~/code/django/ssc/dev/ssc/ssc> python manage.py migrate
Traceback (most recent call last):
  File "manage.py", line 10, in <module>
    execute_from_command_line(sys.argv)
  File "/usr/local/lib/python2.7/dist-packages/django/core/management/__init__.py", line 443, in execute_from_command_line
    utility.execute()
  File "/usr/local/lib/python2.7/dist-packages/django/core/management/__init__.py", line 382, in execute
    self.fetch_command(subcommand).run_from_argv(self.argv)
  File "/usr/local/lib/python2.7/dist-packages/django/core/management/base.py", line 196, in run_from_argv
    self.execute(*args, **options.__dict__)
  File "/usr/local/lib/python2.7/dist-packages/django/core/management/base.py", line 232, in execute
    output = self.handle(*args, **options)
  File "/usr/local/lib/python2.7/dist-packages/south/management/commands/migrate.py", line 108, in handle
    ignore_ghosts = ignore_ghosts,
  File "/usr/local/lib/python2.7/dist-packages/south/migration/__init__.py", line 166, in migrate_app
    Migrations.calculate_dependencies()
  File "/usr/local/lib/python2.7/dist-packages/south/migration/base.py", line 228, in calculate_dependencies
    migration.calculate_dependencies()
  File "/usr/local/lib/python2.7/dist-packages/south/migration/base.py", line 362, in calculate_dependencies
    for migration in self._get_dependency_objects("depends_on"):
  File "/usr/local/lib/python2.7/dist-packages/south/migration/base.py", line 342, in _get_dependency_objects
    for app, name in getattr(self.migration_class(), attrname, []):
  File "/usr/local/lib/python2.7/dist-packages/south/migration/base.py", line 314, in migration_class
    return self.migration().Migration
AttributeError: 'module' object has no attribute 'Migration'
(env)~/code/django/ssc/dev/ssc/ssc> python manage.py convert_to_south crewcal
This application is already managed by South.
(env)~/code/django/ssc/dev/ssc/ssc> python manage.py migrateTraceback (most recent call last):
  File "manage.py", line 10, in <module>
    execute_from_command_line(sys.argv)
  File "/usr/local/lib/python2.7/dist-packages/django/core/management/__init__.py", line 443, in execute_from_command_line
    utility.execute()
  File "/usr/local/lib/python2.7/dist-packages/django/core/management/__init__.py", line 382, in execute
    self.fetch_command(subcommand).run_from_argv(self.argv)
  File "/usr/local/lib/python2.7/dist-packages/django/core/management/base.py", line 196, in run_from_argv
    self.execute(*args, **options.__dict__)
  File "/usr/local/lib/python2.7/dist-packages/django/core/management/base.py", line 232, in execute
    output = self.handle(*args, **options)
  File "/usr/local/lib/python2.7/dist-packages/south/management/commands/migrate.py", line 108, in handle
    ignore_ghosts = ignore_ghosts,
  File "/usr/local/lib/python2.7/dist-packages/south/migration/__init__.py", line 166, in migrate_app
    Migrations.calculate_dependencies()
  File "/usr/local/lib/python2.7/dist-packages/south/migration/base.py", line 228, in calculate_dependencies
    migration.calculate_dependencies()
  File "/usr/local/lib/python2.7/dist-packages/south/migration/base.py", line 362, in calculate_dependencies
    for migration in self._get_dependency_objects("depends_on"):
  File "/usr/local/lib/python2.7/dist-packages/south/migration/base.py", line 342, in _get_dependency_objects
    for app, name in getattr(self.migration_class(), attrname, []):
  File "/usr/local/lib/python2.7/dist-packages/south/migration/base.py", line 314, in migration_class
    return self.migration().Migration
AttributeError: 'module' object has no attribute 'Migration'

Answer 1

In my case the AttributeError: 'module' object has no attribute 'Migration' error was simply a matter of having an extra .py file in my migrations folder.

I had an extra utilities module in my migrations directory which caused South to choke. Moving the module into a different directory (above my apps migrations directory) solved the problem for me.

Answer 2

Maybe a bit late, but still... Is it possible you have any other package (folder with __init__.py) in your migration package and it interferes with the structure?