add: markdown deletion

api/markdown.py

@@ -317,15 +317,21 @@ def delete_markdown(markdown_id):
 
                     session.delete(markdown_setting)
 
+            # Send webhook event before committing the transaction
+            # This ensures webhook handlers can still access related data
+            markdown_deleted.send(None, payload=md)
+            
             session.delete(markdown)
             session.commit()
             
-            markdown_deleted.send(None, payload=md)
             logger.info(f"Successfully deleted markdown {markdown_id} with cascade deletion")
             return jsonify(md), 200
             
         except Exception as e:
+            import traceback
             logger.error(f"Failed to delete markdown {markdown_id}: {e}")
+            logger.error(f"Exception type: {type(e).__name__}")
+            logger.error(f"Full traceback:\n{traceback.format_exc()}")
             errno = RequestContext.get_error_id()
             session.rollback()
             return jsonify({"error": f"delete failed - {errno}"}), 500

events/WebhookEventHandlers/__init__.py

@@ -59,6 +59,10 @@ class WebhookEventHandler(abc.ABC):
 
         if webhook_setting is None and p["parent_id"] != 1:
             return self.get_setting(session, p["parent_id"])
+        
+        # Check if webhook_setting is still None (e.g., when parent_id == 1 or no parent found)
+        if webhook_setting is None:
+            return None
 
         setting = webhook_setting.to_dict()
         if not setting["enabled"] or setting["on_events"] & self.event_type == 0: