fix #451

CHANGELOG.md

@@ -8,6 +8,11 @@ Links "DE#nnn" prior to version 2.0 point to the Dash Enterprise closed-source D
 ### Added
 - [#453](https://github.com/plotly/dash-ag-grid/pull/453) Test for changelog entry
 
+### Changed
+- [#452](https://github.com/plotly/dash-ag-grid/pull/452) 
+  - Added test for `OBJ_MAYBE_FUNCTION_OR_MAP_MAYBE_FUNCTIONS` to test that the value is an object before parsing, 
+  - this allows for reused keys to not comply with being an object
+
 
 ## [35.2.0] - 2026-04-03
 ### Added 

src/lib/fragments/AgGrid.react.js

@@ -529,24 +529,26 @@ export function DashAgGrid(props) {
                     });
                 }
                 if (OBJ_MAYBE_FUNCTION_OR_MAP_MAYBE_FUNCTIONS[target]) {
-                    if ('function' in value) {
-                        if (typeof value.function === 'string') {
-                            return convertMaybeFunctionNoParams(value);
-                        }
-                    }
-                    return map((v) => {
-                        if (
-                            typeof v === 'object' &&
-                            v !== null &&
-                            !Array.isArray(v)
-                        ) {
-                            if (typeof v.function === 'string') {
-                                return convertMaybeFunctionNoParams(v);
+                    if (typeof value === 'object') {
+                        if ('function' in value) {
+                            if (typeof value.function === 'string') {
+                                return convertMaybeFunctionNoParams(value);
                             }
-                            return convertCol(v);
                         }
-                        return v;
-                    }, value);
+                        return map((v) => {
+                            if (
+                                typeof v === 'object' &&
+                                v !== null &&
+                                !Array.isArray(v)
+                            ) {
+                                if (typeof v.function === 'string') {
+                                    return convertMaybeFunctionNoParams(v);
+                                }
+                                return convertCol(v);
+                            }
+                            return v;
+                        }, value);
+                    }
                 }
                 if (
                     COLUMN_NESTED_FUNCTIONS[target] &&

tests/test_cell_data_type_override.py

@@ -2,6 +2,7 @@
 
 import dash_ag_grid as dag
 from dash import Dash, html
+import plotly.express as px
 from . import utils
 
 def test_cd001_cell_data_types_override(enforced_locale, dash_duo):
@@ -146,4 +147,29 @@ def test_cd002_column_types_formatting(dash_duo):
     input_el = dash_duo.find_element("#grid-column-types .ag-input-field-input")
     input_el.send_keys("0.2" + Keys.ENTER)
 
-    grid.wait_for_cell_text(0, 1, "0.200")
+    grid.wait_for_cell_text(0, 1, "0.200")
+
+def test_cd003_column_types_overriding(dash_duo):
+    df = px.data.iris()
+
+    app = Dash(__name__)
+
+    app.layout = html.Div(
+        [
+            dag.AgGrid(
+                rowData=df.to_dict("records"),
+                columnDefs=[{"field": c} for c in df.columns],
+                dashGridOptions={
+                    "dataTypeDefinitions": {
+                        "number": {
+                            "columnTypes": "rightAligned",
+                        }
+                    }
+                },
+                id='grid'
+            )
+        ]
+    )
+
+    dash_duo.start_server(app)
+    grid = utils.Grid(dash_duo, "grid")