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 BaseCommand
from optparse import make_option
class Command(BaseCommand):
option_list = BaseCommand.option_list + (
make_option('--addrport', action='store', dest='addrport',
type='string', default='',
help='port number or ipaddr:port to run the server on'),
)
help = 'Runs a development server with data from the given fixture(s).'
args = '[fixture ...]'
requires_model_validation = False
def handle(self, *fixture_labels, **options):
from django.core.management import call_command
from django.db import connection
verbosity = int(options.get('verbosity', 1))
addrport = options.get('addrport')
# Create a test database.
db_name = connection.creation.create_test_db(verbosity=verbosity)
# Import the fixture data into the test database.
call_command('loaddata', *fixture_labels, **{'verbosity': verbosity})
# Run the development server. Turn off auto-reloading because it causes
# a strange error -- it causes this handle() method to be called
# multiple times.
shutdown_message = '\nServer stopped.\nNote that the test database, %r, has not been deleted. You can explore it on your own.' % db_name
call_command('runserver', addrport=addrport, shutdown_message=shutdown_message, use_reloader=False)