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from optparse import make_option
from django.conf import settings
from django.db import connections, transaction, models, DEFAULT_DB_ALIAS
from django.core.management import call_command
from django.core.management.base import NoArgsCommand, CommandError
from django.core.management.color import no_style
from django.core.management.sql import sql_flush, emit_post_sync_signal
from django.utils.importlib import import_module
class Command(NoArgsCommand):
option_list = NoArgsCommand.option_list + (
make_option('--noinput', action='store_false', dest='interactive', default=True,
help='Tells Django to NOT prompt the user for input of any kind.'),
make_option('--database', action='store', dest='database',
default=DEFAULT_DB_ALIAS, help='Nominates a database to flush. '
'Defaults to the "default" database.'),
)
help = "Executes ``sqlflush`` on the current database."
def handle_noargs(self, **options):
if not options['database']:
dbs = connections
else:
dbs = [options['database']]
verbosity = int(options.get('verbosity', 1))
interactive = options.get('interactive')
self.style = no_style()
for app_name in settings.INSTALLED_APPS:
try:
import_module('.management', app_name)
except ImportError:
pass
for db in dbs:
connection = connections[db]
# Import the 'management' module within each installed app, to register
# dispatcher events.
sql_list = sql_flush(self.style, connection, only_django=True)
if interactive:
confirm = raw_input("""You have requested a flush of the database.
This will IRREVERSIBLY DESTROY all data currently in the %r database,
and return each table to the state it was in after syncdb.
Are you sure you want to do this?
Type 'yes' to continue, or 'no' to cancel: """ % connection.settings_dict['NAME'])
else:
confirm = 'yes'
if confirm == 'yes':
try:
cursor = connection.cursor()
for sql in sql_list:
cursor.execute(sql)
except Exception, e:
transaction.rollback_unless_managed(using=db)
raise CommandError("""Database %s couldn't be flushed. Possible reasons:
* The database isn't running or isn't configured correctly.
* At least one of the expected database tables doesn't exist.
* The SQL was invalid.
Hint: Look at the output of 'django-admin.py sqlflush'. That's the SQL this command wasn't able to run.
The full error: %s""" % (connection.settings_dict['NAME'], e))
transaction.commit_unless_managed(using=db)
# Emit the post sync signal. This allows individual
# applications to respond as if the database had been
# sync'd from scratch.
emit_post_sync_signal(models.get_models(), verbosity, interactive, db)
# Reinstall the initial_data fixture.
kwargs = options.copy()
kwargs['database'] = db
call_command('loaddata', 'initial_data', **kwargs)
else:
print "Flush cancelled."
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