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from django.core.management.base import BaseCommand, CommandError
class Command(BaseCommand):
help = "Useless command."
def add_arguments(self, parser):
parser.add_argument('args', metavar='app_label', nargs='*',
help='Specify the app label(s) to works on.')
parser.add_argument('--empty', action='store_true', dest='empty', default=False,
help="Do nothing.")
def handle(self, *app_labels, **options):
app_labels = set(app_labels)
if options['empty']:
self.stdout.write("Dave, I can't do that.")
return
if not app_labels:
raise CommandError("I'm sorry Dave, I'm afraid I can't do that.")
# raise an error if some --parameter is flowing from options to args
for app_label in app_labels:
if app_label.startswith('--'):
raise CommandError("Sorry, Dave, I can't let you do that.")
self.stdout.write("Dave, my mind is going. I can feel it. I can feel it.")
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