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

polylan_submitter/events/admin.py

@@ -0,0 +1,11 @@
+from django.contrib import admin
+
+from .models import Event
+
+
+@admin.register(Event)
+class EventAdmin(admin.ModelAdmin):
+    list_display = ["name", "path", "created_at"]
+    search_fields = ["name", "path"]
+    prepopulated_fields = {"path": ("name",)}
+    readonly_fields = ["created_at", "updated_at"]

polylan_submitter/events/apps.py

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+from django.apps import AppConfig
+
+
+class EventsConfig(AppConfig):
+    name = "events"

polylan_submitter/events/middleware.py

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+from django.shortcuts import get_object_or_404
+
+from .models import Event
+from .scoping import current_event
+
+
+class EventContextMiddleware:
+    def __init__(self, get_response):
+        self.get_response = get_response
+
+    def __call__(self, request):
+        try:
+            return self.get_response(request)
+        finally:
+            # Not current_event.reset(token): under ASGI, process_view and this
+            # finally block can run in different contextvars.Context copies
+            # (sync_to_async(thread_sensitive=True) copies the context), and
+            # Token.reset() requires the exact Context it was created in.
+            # set(None) has no such constraint.
+            current_event.set(None)
+
+    def process_view(self, request, view_func, view_args, view_kwargs):
+        event_path = view_kwargs.get("event_path")
+        if event_path:
+            request.event = get_object_or_404(Event, path=event_path)
+            current_event.set(request.event)
+        return None

polylan_submitter/events/migrations/0001_initial.py

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+# Generated by Django 6.0.5 on 2026-09-15 21:08
+
+import uuid
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+    initial = True
+
+    dependencies = []
+
+    operations = [
+        migrations.CreateModel(
+            name="Event",
+            fields=[
+                (
+                    "id",
+                    models.UUIDField(
+                        default=uuid.uuid4,
+                        editable=False,
+                        primary_key=True,
+                        serialize=False,
+                    ),
+                ),
+                ("created_at", models.DateTimeField(auto_now_add=True)),
+                ("updated_at", models.DateTimeField(auto_now=True)),
+                ("name", models.CharField(max_length=255)),
+                ("path", models.SlugField(max_length=100, unique=True)),
+            ],
+            options={
+                "abstract": False,
+            },
+        ),
+    ]

polylan_submitter/events/migrations/0002_seed_polylan_43.py

@@ -0,0 +1,24 @@
+from django.db import migrations
+
+EVENT_NAME = "PolyLAN 43"
+EVENT_PATH = "polylan-43"
+
+
+def seed_event(apps, schema_editor):
+    Event = apps.get_model("events", "Event")
+    Event.objects.get_or_create(path=EVENT_PATH, defaults={"name": EVENT_NAME})
+
+
+def unseed_event(apps, schema_editor):
+    Event = apps.get_model("events", "Event")
+    Event.objects.filter(path=EVENT_PATH).delete()
+
+
+class Migration(migrations.Migration):
+    dependencies = [
+        ("events", "0001_initial"),
+    ]
+
+    operations = [
+        migrations.RunPython(seed_event, unseed_event),
+    ]

polylan_submitter/events/models.py

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+from django.db import models
+
+import uuid
+
+
+class BaseModel(models.Model):
+    id = models.UUIDField(primary_key=True, default=uuid.uuid4, editable=False)
+
+    # Timestamps
+    created_at = models.DateTimeField(auto_now_add=True)
+    updated_at = models.DateTimeField(auto_now=True)
+
+    class Meta:
+        abstract = True
+
+
+class Event(BaseModel):
+    name = models.CharField(max_length=255)
+    path = models.SlugField(max_length=100, unique=True)
+
+    def __str__(self) -> str:
+        return self.name

polylan_submitter/events/scoping.py

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+import contextvars
+
+from django.core.exceptions import ImproperlyConfigured
+from django.db import models
+
+current_event = contextvars.ContextVar("current_event", default=None)
+
+
+class EventScopedQuerySet(models.QuerySet):
+    def for_current_event(self):
+        event = current_event.get()
+        if event is None:
+            raise ImproperlyConfigured(
+                f"{self.model.__name__}.for_event was used outside an event-scoped request"
+            )
+        return self.filter(event=event)
+
+
+class EventScopedManager(models.Manager.from_queryset(EventScopedQuerySet)):
+    def get_queryset(self):
+        return super().get_queryset().for_current_event()

polylan_submitter/events/tests.py

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+from django.core.exceptions import ImproperlyConfigured
+from django.test import TestCase
+
+from games.models import Game
+from submissions.models import Submission
+
+from .models import Event
+from .scoping import current_event
+
+
+class EventScopedManagerTests(TestCase):
+    def setUp(self):
+        self.event_a = Event.objects.create(name="Event A", path="event-a")
+        self.event_b = Event.objects.create(name="Event B", path="event-b")
+        self.game = Game.objects.create(name="Test Game", path="test-game")
+        self.submission_a = Submission.objects.create(
+            event=self.event_a, game=self.game
+        )
+        self.submission_b = Submission.objects.create(
+            event=self.event_b, game=self.game
+        )
+
+    def test_for_event_raises_outside_event_context(self):
+        with self.assertRaises(ImproperlyConfigured):
+            list(Submission.for_event.all())
+
+    def test_for_event_filters_to_current_event(self):
+        token = current_event.set(self.event_a)
+        try:
+            results = list(Submission.for_event.all())
+        finally:
+            current_event.reset(token)
+
+        self.assertEqual(results, [self.submission_a])

polylan_submitter/events/views.py

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+# Create your views here.