Merge pull request #7828 from marmelab/7814-datagrid-expand

Fix Datagrid with expand element expands ALL rows when used as a child of ArrayField

Author: fzaninotto

packages/ra-ui-materialui/src/list/datagrid/DatagridBody.tsx

@@ -44,7 +44,7 @@ const DatagridBody: FC<DatagridBodyProps> = React.forwardRef(
                         expand,
                         hasBulkActions: hasBulkActions && !!selectedIds,
                         hover,
-                        id: record.id,
+                        id: record.id ?? `row${rowIndex}`,
                         key: record.id ?? `row${rowIndex}`,
                         onToggleItem,
                         record,