Sith/club/migrations/0012_club_board_group_club_members_group.py

# Generated by Django 4.2.16 on 2024-11-20 17:08

import django.db.models.deletion
from django.conf import settings
from django.db import migrations, models
from django.db.migrations.state import StateApps


def migrate_meta_groups(apps: StateApps, schema_editor):
    Group = apps.get_model("core", "Group")
    Club = apps.get_model("club", "Club")

    meta_groups = Group.objects.filter(is_meta=True)
    clubs = list(Club.objects.all())
    for club in clubs:
        club.board_group = meta_groups.get_or_create(
            name=club.unix_name + settings.SITH_BOARD_SUFFIX
        )[0]
        club.members_group = meta_groups.get_or_create(
            name=club.unix_name + settings.SITH_MEMBER_SUFFIX
        )[0]
    Club.objects.bulk_update(clubs, fields=["board_group", "members_group"])


# steps of the migration :
# - Create a nullable field for the board group and the member group
# - Edit those new fields to make them point to currently existing meta groups
# - When this data migration is done, make the fields non-nullable
class Migration(migrations.Migration):
    dependencies = [
        ("core", "0040_alter_user_options_user_user_permissions_and_more"),
        ("club", "0011_auto_20180426_2013"),
    ]

    operations = [
        migrations.AddField(
            model_name="club",
            name="board_group",
            field=models.OneToOneField(
                blank=True,
                null=True,
                on_delete=django.db.models.deletion.CASCADE,
                related_name="club_board",
                to="core.group",
            ),
        ),
        migrations.AddField(
            model_name="club",
            name="members_group",
            field=models.OneToOneField(
                blank=True,
                null=True,
                on_delete=django.db.models.deletion.CASCADE,
                related_name="club",
                to="core.group",
            ),
        ),
        migrations.RunPython(
            migrate_meta_groups, reverse_code=migrations.RunPython.noop, elidable=True
        ),
        migrations.AlterField(
            model_name="club",
            name="board_group",
            field=models.OneToOneField(
                on_delete=django.db.models.deletion.CASCADE,
                related_name="club_board",
                to="core.group",
            ),
        ),
        migrations.AlterField(
            model_name="club",
            name="members_group",
            field=models.OneToOneField(
                on_delete=django.db.models.deletion.CASCADE,
                related_name="club",
                to="core.group",
            ),
        ),
    ]