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nk20/apps/wei/management/commands/wei_algorithm.py

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# Copyright (C) 2018-2021 by BDE ENS Paris-Saclay
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# SPDX-License-Identifier: GPL-3.0-or-later
from argparse import ArgumentParser, FileType
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from django.core.management import BaseCommand
from django.db import transaction
from ...forms import CurrentSurvey
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class Command(BaseCommand):
help = "Attribute to each first year member a bus for the WEI"
def add_arguments(self, parser: ArgumentParser):
parser.add_argument('--doit', '-d', action='store_true', help='Finally run the algorithm in non-dry mode.')
parser.add_argument('--output', '-o', nargs='?', type=FileType('w'), default=self.stdout,
help='Output file for the algorithm result. Default is standard output.')
@transaction.atomic
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def handle(self, *args, **options):
"""
Run the WEI algorithm to attribute a bus to each first year member.
"""
sid = transaction.savepoint()
algorithm = CurrentSurvey.get_algorithm_class()()
algorithm.run_algorithm()
output = options['output']
registrations = algorithm.get_registrations()
per_bus = {bus: [r for r in registrations if 'selected_bus_pk' in r.information
and r.information['selected_bus_pk'] == bus.pk]
for bus in algorithm.get_buses()}
for bus, members in per_bus.items():
output.write(bus.name + "\n")
output.write("=" * len(bus.name) + "\n")
for r in members:
output.write(r.user.username + "\n")
output.write("\n")
if not options['doit']:
self.stderr.write(self.style.WARNING("Running in dry mode. "
"Use --doit option to really execute the algorithm."))
transaction.savepoint_rollback(sid)
return