Create signal jobs reliably

inference/signals.py

@@ -7,34 +7,52 @@ def create_periodic_tasks(sender, **kwargs):
     if sender.name == "inference":
         from django_celery_beat.models import CrontabSchedule, PeriodicTask
 
-        # Create schedule for every 5 minutes between 6pm-7am
-        crontab, _ = CrontabSchedule.objects.get_or_create(
+        # Weekday evening schedule (6pm-7am)
+        weekday_crontab, _ = CrontabSchedule.objects.get_or_create(
             minute="*/5",
             hour="18-23,0-6",
-            day_of_week="*",
+            day_of_week="1-5",  # Monday-Friday
             day_of_month="*",
             month_of_year="*",
         )
 
-        # Create the periodic task if it doesn't exist
-        PeriodicTask.objects.get_or_create(
-            crontab=crontab,
-            name="Process inference queue (6pm-7am)",
-            task="inference.tasks.process_inference_job_queue",
-        )
-
-        # Create schedule the weekend
+        # Weekend schedule (all day)
         weekend_crontab, _ = CrontabSchedule.objects.get_or_create(
             minute="*/5",
             hour="*",
-            day_of_week="0,6",
+            day_of_week="0,6",  # Saturday-Sunday
             day_of_month="*",
             month_of_year="*",
         )
 
-        # Create the periodic task if it doesn't exist
-        PeriodicTask.objects.get_or_create(
-            crontab=weekend_crontab,
-            name="Process inference queue (Weekends)",
-            task="inference.tasks.process_inference_job_queue",
-        )
+        # Check if weekday task exists
+        weekday_task_name = "Process inference queue (6pm-7am)"
+        weekday_task_exists = PeriodicTask.objects.filter(name=weekday_task_name).exists()
+
+        if not weekday_task_exists:
+            PeriodicTask.objects.create(
+                crontab=weekday_crontab,
+                name=weekday_task_name,
+                task="inference.tasks.process_inference_job_queue",
+            )
+        else:
+            weekday_task = PeriodicTask.objects.get(name=weekday_task_name)
+            weekday_task.crontab = weekday_crontab
+            weekday_task.task = "inference.tasks.process_inference_job_queue"
+            weekday_task.save()
+
+        # Check if weekend task exists
+        weekend_task_name = "Process inference queue (Weekends)"
+        weekend_task_exists = PeriodicTask.objects.filter(name=weekend_task_name).exists()
+
+        if not weekend_task_exists:
+            PeriodicTask.objects.create(
+                crontab=weekend_crontab,
+                name=weekend_task_name,
+                task="inference.tasks.process_inference_job_queue",
+            )
+        else:
+            weekend_task = PeriodicTask.objects.get(name=weekend_task_name)
+            weekend_task.crontab = weekend_crontab
+            weekend_task.task = "inference.tasks.process_inference_job_queue"
+            weekend_task.save()