weird header stuff

parks/signals.py

@@ -0,0 +1,35 @@
+from django.db.models.signals import post_save, post_delete
+from django.dispatch import receiver
+from django.db.models import Count, Q
+
+from rides.models import Ride
+from .models import Park
+
+def update_park_ride_counts(park):
+    """Update total_rides and total_roller_coasters for a park"""
+    operating_rides = Q(status='OPERATING')
+    
+    # Count total operating rides
+    total_rides = park.rides.filter(operating_rides).count()
+    
+    # Count total operating roller coasters
+    total_coasters = park.rides.filter(
+        operating_rides,
+        category='RC'
+    ).count()
+    
+    # Update park counts
+    Park.objects.filter(id=park.id).update(
+        total_rides=total_rides,
+        total_roller_coasters=total_coasters
+    )
+
+@receiver(post_save, sender=Ride)
+def ride_saved(sender, instance, **kwargs):
+    """Update park counts when a ride is saved"""
+    update_park_ride_counts(instance.park)
+
+@receiver(post_delete, sender=Ride)
+def ride_deleted(sender, instance, **kwargs):
+    """Update park counts when a ride is deleted"""
+    update_park_ride_counts(instance.park)