refactor(models): split models.py into submodules

home/models/event_occurrence.py

@@ -0,0 +1,38 @@
+from django.contrib.auth.models import User
+from django.db import models
+from django.utils import timezone
+from modelcluster.fields import ParentalKey
+
+from .pages import EventPage
+
+
+class EventOccurrence(models.Model):
+    event = ParentalKey(EventPage, related_name="occurrences", on_delete=models.CASCADE)
+    start = models.DateTimeField()
+    end = models.DateTimeField()
+    signed_up_users = models.ManyToManyField(
+        User,
+        related_name="event_occurrences_signed_up",
+        blank=True,
+        help_text="Users who have signed up for this occurrence.",
+    )
+
+    class Meta:
+        ordering = ["start"]
+
+    def __str__(self):
+        return f"{self.event.title} ({self.start} - {self.end})"
+
+    @property
+    def attendees_count(self):
+        return self.signed_up_users.count()
+
+    @property
+    def is_past(self):
+
+        return self.end < timezone.now()
+
+    def user_signed_up(self, user):
+        if not user.is_authenticated:
+            return False
+        return self.signed_up_users.filter(id=user.id).exists()