fix: resolve a path import bug in row-change triggers. (baserow#5018)

Author: picklepete

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

@@ -2373,11 +2373,13 @@ def import_path(self, path, id_mapping):
         Import Local Baserow signal service types paths.
         """
 
-        # All Local Baserow signal service types have a length of 3:
-        # {previousNodeId}.{rowIndex}.{fieldName}. By this point, we should
-        # only have two parts: {rowIndex}.{fieldName}.
-        if len(path) == 2:
-            index, field_dbname = path
+        # If we receive:
+        # {previousNodeId}.{rowIndex}.{fieldName}, or
+        # {previousNodeId}.{rowIndex}.{fieldName}.{fieldValueIndex}.{value}
+        #   (e.g. a `link_row`)
+        # then pluck out the row index / field name and use it.
+        if len(path) >= 2:
+            index, field_dbname, *rest = path
         else:
             # In any other scenario, we have a formula that is not a format we
             # can currently import properly, so we return the path as is.
@@ -2392,7 +2394,7 @@ def import_path(self, path, id_mapping):
             self.import_property_name(field_dbname, id_mapping) or field_dbname
         )
 
-        return [index, imported_field_dbname]
+        return [index, imported_field_dbname, *rest]
 
 
 class LocalBaserowRowsCreatedServiceType(LocalBaserowRowsSignalServiceType):

backend/tests/baserow/contrib/integrations/local_baserow/service_types/test_rows_signal_service_type.py

@@ -0,0 +1,34 @@
+import pytest
+
+from baserow.contrib.integrations.local_baserow.service_types import (
+    LocalBaserowRowsCreatedServiceType,
+)
+
+
+@pytest.mark.parametrize(
+    "path,id_mapping,expected",
+    [
+        # When path has fewer than 2 elements, return as is
+        ([], {}, []),
+        (["0"], {}, ["0"]),
+        # When field_dbname doesn't start with "field_", return path as is
+        (["0", "id"], {}, ["0", "id"]),
+        (["0", "foo"], {}, ["0", "foo"]),
+        # {rowIndex}.{fieldName} and field not in mapping
+        (["0", "field_1"], {}, ["0", "field_1"]),
+        # {rowIndex}.{fieldName} and field in mapping
+        (["0", "field_1"], {"database_fields": {1: 2}}, ["0", "field_2"]),
+        # {rowIndex}.{fieldName}.{fieldValueIndex}.{value} and field not in mapping
+        (["0", "field_1", "0", "value"], {}, ["0", "field_1", "0", "value"]),
+        # {rowIndex}.{fieldName}.{fieldValueIndex}.{value} and field in mapping
+        (
+            ["0", "field_1", "0", "value"],
+            {"database_fields": {1: 2}},
+            ["0", "field_2", "0", "value"],
+        ),
+    ],
+)
+def test_local_baserow_rows_signal_service_type_import_path(path, id_mapping, expected):
+    assert (
+        LocalBaserowRowsCreatedServiceType().import_path(path, id_mapping) == expected
+    )

changelog/entries/unreleased/bug/resolved_a_bug_which_prevented_certain_baserow_field_types_f.json

@@ -0,0 +1,9 @@
+{
+    "type": "bug",
+    "message": "Resolved a bug which prevented certain Baserow field types from being used after a row-change trigger.",
+    "issue_origin": "github",
+    "issue_number": null,
+    "domain": "automation",
+    "bullet_points": [],
+    "created_at": "2026-03-20"
+}