Dont prepare serialized rows if there is no trigger associated with the table (baserow#4284)

Author: jrmi

backend/src/baserow/contrib/automation/nodes/node_types.py

@@ -1,4 +1,4 @@
-from typing import Any, Dict, List, Optional
+from typing import Any, Callable, Dict, List, Optional
 
 from django.contrib.auth.models import AbstractUser
 from django.db import router
@@ -341,14 +341,14 @@ def before_move(
     def on_event(
         self,
         services: QuerySet[Service],
-        event_payload: Optional[List[Dict]] = None,
+        event_payload: List[Dict] | None | Callable = None,
         user: Optional[AbstractUser] = None,
     ):
         from baserow.contrib.automation.workflows.handler import (
             AutomationWorkflowHandler,
         )
 
-        triggers = (
+        triggers = list(
             self.model_class.objects.filter(
                 service__in=services,
             )
@@ -363,6 +363,9 @@ def on_event(
             .select_related("workflow__automation__workspace")
         )
 
+        if triggers and callable(event_payload):
+            event_payload = event_payload()
+
         for trigger in triggers:
             workflow = trigger.workflow
 

backend/src/baserow/contrib/integrations/local_baserow/service_types.py

@@ -2283,18 +2283,22 @@ def _handle_signal(
         model: "GeneratedTableModel",
         **kwargs,
     ):
-        serializer = get_row_serializer_class(
-            model, RowSerializer, is_response=True, user_field_names=True
-        )
+        def get_data():
+            # Make sure we have an up to date model
+            local_model = model.baserow_table.get_model()
 
-        data_to_process = {
-            "results": serializer(rows, many=True).data,
-            "has_next_page": False,
-        }
+            serializer = get_row_serializer_class(
+                local_model, RowSerializer, is_response=True, user_field_names=True
+            )
+
+            return {
+                "results": serializer(rows, many=True).data,
+                "has_next_page": False,
+            }
 
         self._process_event(
             self.model_class.objects.filter(table=table),
-            data_to_process,
+            get_data,
             user=user,
         )
 

changelog/entries/unreleased/bug/save_data_preparation_for_table_that_dont_have_trigger_assoc.json

@@ -0,0 +1,9 @@
+{
+    "type": "bug",
+    "message": "Save data preparation for table that don't have trigger associated to it",
+    "issue_origin": "github",
+    "issue_number": null,
+    "domain": "automation",
+    "bullet_points": [],
+    "created_at": "2025-11-18"
+}