feat: add events app + "multi-tenants" aka multi-events

polylan_submitter/opus_magnum/migrations/0017_backfill_event.py

@@ -0,0 +1,27 @@
+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),
+    ]