process_bundle_changes: Avoid crash when the user has no

subscriptions.
Select active users only.
Signed-off-by: Birin Sanchez <birin.sanchez@puri.sm>

limitmonitor/task_resources/subscription.py

@@ -130,7 +130,7 @@ def process_bundle_changes():
     # We get all pending BundleChanges in reverse order ("-id") so we
     # process the most recent ones earlier.
     pending_changes = BundleChange.objects.filter(
-        is_pending=True).order_by('-id')
+        is_pending=True).filter(user__is_active=True).order_by('-id')
 
     for pending_change in pending_changes:
         is_active = False
@@ -138,6 +138,11 @@ def process_bundle_changes():
 
         # Check if the subscription is active
         subs = get_user_subscriptions(pending_change.user)
+        if subs is None:
+            logger.info('User {} has no subscriptions. BundleChange cannot be '
+                        'processed'.format(pending_change.user))
+            continue
+
         for sub in subs:
             order_id = sub.get('parent_id', -1)
             sub_status = sub.get('status', '')