app/django/core/management/commands/dbshell.py
author Sverre Rabbelier <srabbelier@gmail.com>
Wed, 02 Sep 2009 10:24:10 +0200
changeset 2854 003a84e774e2
parent 323 ff1a9aa48cfd
permissions -rw-r--r--
Add support for prefetching fields This makes it possible to specify the fields that should be prefetched as part of a getForFields query. Doing a prefetch on a ReferenceProperty when it is known that the property will be referenced in (almost all) entities is far more efficient than doing the invididual fetches sequentially.

from django.core.management.base import NoArgsCommand, CommandError

class Command(NoArgsCommand):
    help = "Runs the command-line client for the current DATABASE_ENGINE."

    requires_model_validation = False

    def handle_noargs(self, **options):
        from django.db import connection
        try:
            connection.client.runshell()
        except OSError:
            # Note that we're assuming OSError means that the client program
            # isn't installed. There's a possibility OSError would be raised
            # for some other reason, in which case this error message would be
            # inaccurate. Still, this message catches the common case.
            raise CommandError('You appear not to have the %r program installed or on your path.' % \
                connection.client.executable_name)