Closes #3451: Add pre-/post-change snapshots to webhooks

netbox/extras/webhooks.py

@@ -6,6 +6,7 @@ from django.utils import timezone
 from django_rq import get_queue
 
 from utilities.api import get_serializer_for_model
+from utilities.utils import serialize_object
 from .choices import *
 from .models import Webhook
 from .registry import registry
@@ -44,6 +45,7 @@ def enqueue_webhooks(instance, user, request_id, action):
     webhooks = Webhook.objects.filter(content_types=content_type, enabled=True, **{action_flag: True})
 
     if webhooks.exists():
+
         # Get the Model's API serializer class and serialize the object
         serializer_class = get_serializer_for_model(instance.__class__)
         serializer_context = {
@@ -51,16 +53,23 @@ def enqueue_webhooks(instance, user, request_id, action):
         }
         serializer = serializer_class(instance, context=serializer_context)
 
+        # Gather pre- and post-change snapshots
+        snapshots = {
+            'prechange': getattr(instance, '_prechange_snapshot', None),
+            'postchange': serialize_object(instance) if action != ObjectChangeActionChoices.ACTION_DELETE else None,
+        }
+
         # Enqueue the webhooks
         webhook_queue = get_queue('default')
         for webhook in webhooks:
             webhook_queue.enqueue(
                 "extras.webhooks_worker.process_webhook",
-                webhook,
-                serializer.data,
-                instance._meta.model_name,
-                action,
-                str(timezone.now()),
-                user.username,
-                request_id
+                webhook=webhook,
+                model_name=instance._meta.model_name,
+                event=action,
+                data=serializer.data,
+                snapshots=snapshots,
+                timestamp=str(timezone.now()),
+                username=user.username,
+                request_id=request_id
             )