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from django.core.management.base import NoArgsCommand
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from django.db import connection, models
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from south.models import MigrationHistory
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from django.core.management.commands.syncdb import Command as DjangoSyncdbCommand
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from south.management.commands.syncdb import Command as SouthSyncdbCommand
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from south.management.commands.migrate import Command as SouthMigrateCommand
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class Command(NoArgsCommand):
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option_list = DjangoSyncdbCommand.option_list
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help = "syncdb and migrate the project, migrate '--fake app 0001' each app that has a new initial migration"
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def handle_noargs(self, *args, **options):
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verbosity = int(options['verbosity'])
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# step 1 : syncdb, create all apps without migrations
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SouthSyncdbCommand().execute(migrate_all=False, migrate=False, **options)
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# step 2 : detect and "fake 0001" all installed apps that had never
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# migrated (applications in database but not in south history)
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if verbosity > 0:
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print
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self.fake_if_needed(verbosity)
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# step 3 : migrate
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if verbosity > 0:
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print
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SouthMigrateCommand().execute(**options)
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def fake_if_needed(self, verbosity=1):
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# detect installed models
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# (code borrowed from django syncdb command)
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tables = connection.introspection.table_names()
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def model_in_database(model):
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opts = model._meta
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converter = connection.introspection.table_name_converter
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return (converter(opts.db_table) in tables) or \
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(opts.auto_created and converter(opts.auto_created._meta.db_table) in tables)
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# list all applications with south migration
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# (code borrowed from south migrate command)
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from south import migration
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apps = list(migration.all_migrations())
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applied_migrations = MigrationHistory.objects.filter(app_name__in=[app.app_label() for app in apps])
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applied_migrations_lookup = dict(('%s.%s' % (mi.app_name, mi.migration), mi) for mi in applied_migrations)
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if verbosity > 0:
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print 'Status after syncdb:'
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for app in apps:
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# for each app with migrations, list already applied migrations
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applied_migrations = []
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for migration in app:
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full_name = migration.app_label() + "." + migration.name()
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if full_name in applied_migrations_lookup:
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applied_migration = applied_migrations_lookup[full_name]
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if applied_migration.applied:
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applied_migrations.append(migration.name())
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# try all models in database, if there none, the application is new
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# (because south syncdb does not create any tables)
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new = True
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for m in models.get_models(app.get_application().models):
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if model_in_database(m):
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new = False
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break
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if new:
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status = 'application-is-new'
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elif not applied_migrations:
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status = 'migration-is-new'
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else:
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status = 'normal'
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if verbosity > 0:
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print ' - %s: %s' % (app.app_label(), status)
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if status == 'migration-is-new':
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if verbosity > 0:
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print ' need fake migration to 0001_initial'
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# migrate --fake gdc 0001
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SouthMigrateCommand().execute(app=app.app_label(), target='0001', fake=True, verbosity=verbosity)
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