South supporting multiple databases

[cmkmrr]

On Django's 1.2 Roadmap (​http://code.djangoproject.com/wiki/Version1.2Features) there is a proposed feature of the multi-db work that Alex Gaynor did for the GSoC.

Making south work with multiple databases (with the branch mentioned above), will probably be worthwhile.

I have a partial patch right now (not complete) that I am attaching for feedback.

[cmkmrr]

This patch should apply cleanly to rev 377.

[anonymous]

MultiDB has now been committed, and South currently fails on it:

(venv)computer:build user$ ./manage.py syncdb
Traceback (most recent call last):

File "./manage.py", line 11, in <module>

execute_manager(settings)

File "*/venv/src/django/django/core/management/init.py", line 439, in execute_manager

utility.execute()

File "*/venv/src/django/django/core/management/init.py", line 380, in execute

self.fetch_command(subcommand).run_from_argv(self.argv)

File "*/venv/src/django/django/core/management/init.py", line 257, in fetch_command

klass = load_command_class(app_name, subcommand)

File "*/venv/src/django/django/core/management/init.py", line 67, in load_command_class

module = import_module('%s.management.commands.%s' % (app_name, name))

File "*/venv/src/django/django/utils/importlib.py", line 35, in import_module

import(name)

File "*/venv/lib/python2.6/site-packages/south/management/commands/syncdb.py", line 5, in <module>

from south import migration

File "*/venv/lib/python2.6/site-packages/south/migration.py", line 17, in <module>

from south.db import db

File "*/venv/lib/python2.6/site-packages/south/db/init.py", line 17, in <module>

db = module.DatabaseOperations?()

AttributeError?: 'module' object has no attribute 'DatabaseOperations?'

[andrew]

MultiDB isn't the only 1.2 feature which South doesn't work with; after the feature freeze, I'll be fixing that.

[Linas]

Replying to anonymous:

MultiDB has now been committed, and South currently fails on it:

(venv)computer:build user$ ./manage.py syncdb
Traceback (most recent call last):

File "*/venv/lib/python2.6/site-packages/south/db/init.py", line 17, in <module>

db = module.DatabaseOperations?()

AttributeError?: 'module' object has no attribute 'DatabaseOperations?'

This can be fixed by explicitly providing a custom
SOUTH_DATABASE_ADAPTER = 'south.db....'
in settings.py.

The worse problem is that since rev 11889 contenttypes/management:update_contenttypes expects 'db' as a keyword argument and throws http://south.aeracode.org/ticket/310 without it.

Anyway, Andrew, thank you for the great work!

Linas

[andrew]

South now works fine with the new multidb support. [a29e90b115df] adds a --database option to migrate to choose your database.