fix(services_frontend): wrong error displayed during deletion

CHANGELOG

@@ -14,6 +14,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - [SYSTEM] [NODE] Uniformize editable fields on API and GUI
 - [HTML] [NODE] Show better field errors while editing Node parameters
 - [NETWORK] Avoid defining NATing routes using loopback interfaces
+- [SERVICES] [FRONTEND] Wrong error displayed on frontend deletion
 
 
 ## [2.18.0] - 2024-12-18

vulture_os/services/frontend/views.py

@@ -141,6 +141,8 @@
         # that is, if the frontend is associated with a policy with at least one filter with buffering configured
         was_darwin_buffered = DarwinBuffering.objects.filter(destination_filter__policy__frontend_set=frontend).exists()
 
+        used_by = set(frontend.userauthentication_set.all()).union(set(frontend.workflow_set.all()))
+
         try:
             # If POST request and no error: delete frontend
             frontend.delete()
@@ -182,7 +184,7 @@
         except ProtectedError as e:
             logger.error("Error trying to delete Frontend '{}': Object is currently used :".format(frontend.name))
             logger.exception(e)
-            error = "Object is currently used by a Workflow, cannot be deleted"
+            error = f"Object is currently used by {used_by}, cannot be deleted"
 
             if api:
                 return JsonResponse({
@@ -207,6 +209,7 @@
     return render(request, 'generic_delete.html', {
         'obj_inst': frontend,
         'related_objs': listeners,
+        'used_by': used_by,
         'error': error,
         'redirect_url': '/services/frontend/',
         'menu_name': 'Services -> Listeners -> Delete'
@@ -540,13 +543,13 @@
             logger.debug("Frontend '{}' (id={}) saved in MongoDB.".format(frontend.name, frontend.id))
 
             """ And all the listeners early created """
             for l in listener_objs:
                 l.frontend = frontend
                 logger.debug("Saving listener {}".format(str(l)))
                 l.save()
 
             """ Delete listeners deleted in form """
             for l in frontend.listener_set.exclude(pk__in=[l.id for l in listener_objs]):
                 l.delete()
                 logger.info("Deleting listener {}".format(l))