old_contents: from datetime import datetime, timedelta
  
  from django.conf import settings
  
  from db.models.activitylogs import ActivityLog
  from db.models.notification import Notification
  from polyaxon.celery_api import app as celery_app
  from polyaxon.settings import CronsCeleryTasks
  
  
  @celery_app.task(name=CronsCeleryTasks.CLEAN_ACTIVITY_LOGS, ignore_result=True)
  def clean_activity_logs():
      last_date = datetime.today() - timedelta(days=settings.CleaningIntervals.ACTIVITY_LOGS)
      ActivityLog.objects.filter(created_at__lte=last_date).delete()
  
  
  @celery_app.task(name=CronsCeleryTasks.CLEAN_NOTIFICATIONS, ignore_result=True)
  def clean_notifications():
      last_date = datetime.today() - timedelta(days=settings.CleaningIntervals.NOTIFICATIONS)
      Notification.objects.filter(created_at__lte=last_date).delete()
  
new_contents: from datetime import datetime, timedelta
  
  
  from db.models.activitylogs import ActivityLog
  from db.models.notification import Notification
  from polyaxon.celery_api import app as celery_app
  from polyaxon.settings import CronsCeleryTasks, CleaningIntervals
  
  
  @celery_app.task(name=CronsCeleryTasks.CLEAN_ACTIVITY_LOGS, ignore_result=True)
  def clean_activity_logs():
      last_date = datetime.today() - timedelta(days=CleaningIntervals.ACTIVITY_LOGS)
      ActivityLog.objects.filter(created_at__lte=last_date).delete()
  
  
  @celery_app.task(name=CronsCeleryTasks.CLEAN_NOTIFICATIONS, ignore_result=True)
  def clean_notifications():
      last_date = datetime.today() - timedelta(days=CleaningIntervals.NOTIFICATIONS)
      Notification.objects.filter(created_at__lte=last_date).delete()
  
subject: Fix cleaning intervals import