app/django/core/management/commands/reset.py
author Pawel Solyga <Pawel.Solyga@gmail.com>
Mon, 01 Jun 2009 22:23:46 +0200
changeset 2376 feec28b50f1b
parent 54 03e267d67478
permissions -rw-r--r--
Extend taggable-mixin to support different Tag models. Usage is pretty simple. Tag model is default in Taggable constructor but you can call it with different model like GHOPTaskType that inherits from Tag model. Both Taggable and Tag models have been updated and they don't use hardcoded Tag model anymore and instead use cls of class methods or self.__class__. In case of Taggable it's self.__tag_model.

from django.core.management.base import AppCommand, CommandError
from django.core.management.color import no_style
from optparse import make_option

class Command(AppCommand):
    option_list = AppCommand.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.'),
    )
    help = "Executes ``sqlreset`` for the given app(s) in the current database."
    args = '[appname ...]'

    output_transaction = True

    def handle_app(self, app, **options):
        from django.db import connection, transaction
        from django.conf import settings
        from django.core.management.sql import sql_reset

        app_name = app.__name__.split('.')[-2]

        self.style = no_style()

        sql_list = sql_reset(app, self.style)

        if options.get('interactive'):
            confirm = raw_input("""
You have requested a database reset.
This will IRREVERSIBLY DESTROY any data for
the "%s" application in the database "%s".
Are you sure you want to do this?

Type 'yes' to continue, or 'no' to cancel: """ % (app_name, settings.DATABASE_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()
                raise CommandError("""Error: %s couldn't be reset. Possible reasons:
  * The database isn't running or isn't configured correctly.
  * At least one of the database tables doesn't exist.
  * The SQL was invalid.
Hint: Look at the output of 'django-admin.py sqlreset %s'. That's the SQL this command wasn't able to run.
The full error: %s""" % (app_name, app_name, e))
            transaction.commit_unless_managed()
        else:
            print "Reset cancelled."