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

polylan_submitter/submissions/migrations/0003_submission_event.py

@@ -0,0 +1,24 @@
+# Generated by Django 6.0.5 on 2026-09-15 21:08
+
+import django.db.models.deletion
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+    dependencies = [
+        ("events", "0002_seed_polylan_43"),
+        ("submissions", "0002_submission_game_alter_submission_user"),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name="submission",
+            name="event",
+            field=models.ForeignKey(
+                null=True,
+                on_delete=django.db.models.deletion.CASCADE,
+                related_name="submissions",
+                to="events.event",
+            ),
+        ),
+    ]

polylan_submitter/submissions/migrations/0004_backfill_submission_event.py

@@ -0,0 +1,25 @@
+from django.db import migrations
+
+EVENT_PATH = "polylan-43"
+
+
+def backfill_event(apps, schema_editor):
+    Event = apps.get_model("events", "Event")
+    Submission = apps.get_model("submissions", "Submission")
+    event = Event.objects.get(path=EVENT_PATH)
+    Submission.objects.filter(event__isnull=True).update(event=event)
+
+
+def noop(apps, schema_editor):
+    pass
+
+
+class Migration(migrations.Migration):
+    dependencies = [
+        ("submissions", "0003_submission_event"),
+        ("events", "0002_seed_polylan_43"),
+    ]
+
+    operations = [
+        migrations.RunPython(backfill_event, noop),
+    ]

polylan_submitter/submissions/migrations/0005_submission_event_required.py

@@ -0,0 +1,20 @@
+import django.db.models.deletion
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+    dependencies = [
+        ("submissions", "0004_backfill_submission_event"),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name="submission",
+            name="event",
+            field=models.ForeignKey(
+                on_delete=django.db.models.deletion.CASCADE,
+                related_name="submissions",
+                to="events.event",
+            ),
+        ),
+    ]