from django.db import migrations

EVENT_PATH = "polylan-43"


def backfill_event(apps, schema_editor):
    Event = apps.get_model("events", "Event")
    SteamCollection = apps.get_model("opus_magnum", "SteamCollection")
    Submission = apps.get_model("opus_magnum", "Submission")
    event = Event.objects.get(path=EVENT_PATH)
    SteamCollection.objects.filter(event__isnull=True).update(event=event)
    Submission.objects.filter(event__isnull=True).update(event=event)


def noop(apps, schema_editor):
    pass


class Migration(migrations.Migration):
    dependencies = [
        ("opus_magnum", "0016_steamcollection_event_submission_event"),
        ("events", "0002_seed_polylan_43"),
    ]

    operations = [
        migrations.RunPython(backfill_event, noop),
    ]