Django - South - Is There a way to view the SQL it runs?

Question

Here\'s what I want to do.

Develop a Django project on a development server with a development database. Run the south migrations as necessary when I change the model.<

Answer 1

You could try logging the SQL queries in db.connection.queries, using a management command that calls the migrate with a dry-run option:

from django.core.management.base import BaseCommand
from django import db

class Command(BaseCommand):
    help = 'Output SQL for migration'

    def handle(self, *app_labels, **options):
        # assumes DEBUG is True in settings
        db.reset_queries()

        from django.core.management import call_command
        kw = {'db-dry-run': 1,  'verbosity': 0}
        call_command('migrate', **kw)

        for query in db.connection.queries:
            print query['sql']

Assuming that south puts everything through the usual db interface that should work. There will be a few extra selects in there when it queries the history table.

You'd put that in a management/commands/print_migration_sql.py inside your app and then run it:

python manage.py print_migration_sql

It could probably be easily extended to run this only for specific apps etc