14438 add generic relation so delete will show event rule

netbox/extras/api/serializers.py

@@ -84,7 +84,10 @@ class EventRuleSerializer(NetBoxModelSerializer):
         if instance.action_type == EventRuleActionChoices.SCRIPT:
             script = instance.action_object
             script_name = script.name
-            return NestedScriptSerializer(script.python_class(), context=context).data
+            if script.python_class:
+                return NestedScriptSerializer(script.python_class(), context=context).data
+            else:
+                return NestedScriptSerializer(None, context=context).data
         else:
             serializer = get_serializer_for_model(
                 model=instance.action_object_type.model_class(),

netbox/extras/models/scripts.py

@@ -2,6 +2,7 @@ import inspect
 import logging
 from functools import cached_property
 
+from django.contrib.contenttypes.fields import GenericRelation
 from django.db import models
 from django.db.models import Q
 from django.urls import reverse
@@ -35,6 +36,11 @@ class Script(EventRulesMixin, JobsMixin, models.Model):
     is_valid = models.BooleanField(
         default=True
     )
+    events = GenericRelation(
+        'extras.EventRule',
+        content_type_field='action_object_type',
+        object_id_field='action_object_id'
+    )
 
     def __str__(self):
         return self.name