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

polylan_submitter/events/scoping.py

@@ -0,0 +1,21 @@
+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()