DataGrid - AI Column: Column reordering does not work if allowColumnReordering and columnFixing.enabled turned on (#31836)

Author: dmlvr

e2e/testcafe-devextreme/tests/dataGrid/common/aiColumn/columnReordering.functional.ts

@@ -115,3 +115,42 @@ test('Column reordering should not work when it has allowReordering set to false
     { dataField: 'value', caption: 'Value' },
   ],
 }));
+
+test('Column reordering should work when allowColumnReordering is true and columnFixing.enabled is true', async (t) => {
+  // arrange
+  const dataGrid = new DataGrid(DATA_GRID_SELECTOR);
+  const headerRow = dataGrid.getHeaders().getHeaderRow(0);
+
+  await t.expect(dataGrid.isReady()).ok();
+
+  // assert
+  await t.expect(await headerRow.getHeaderTexts()).eql(['AI Column', 'ID', 'Name', 'Value']);
+
+  // act
+  await t.drag(headerRow.getHeaderCell(0).element, 150, 0);
+
+  // assert
+  await t.expect(await headerRow.getHeaderTexts()).eql(['ID', 'AI Column', 'Name', 'Value']);
+}).before(async () => createWidget('dxDataGrid', {
+  dataSource: [
+    { id: 1, name: 'Name 1', value: 10 },
+    { id: 2, name: 'Name 2', value: 20 },
+    { id: 3, name: 'Name 3', value: 30 },
+  ],
+  keyExpr: 'id',
+  allowColumnReordering: true,
+  columnFixing: {
+    enabled: true,
+  },
+  columnWidth: 100,
+  columns: [
+    {
+      type: 'ai',
+      caption: 'AI Column',
+      name: 'myAiColumn',
+    },
+    { dataField: 'id', caption: 'ID' },
+    { dataField: 'name', caption: 'Name' },
+    { dataField: 'value', caption: 'Value' },
+  ],
+}));

packages/devextreme/js/__internal/grids/grid_core/columns_controller/m_columns_controller_utils.ts

@@ -915,7 +915,15 @@ export const mergeColumns = (that: ColumnsController, columns, commandColumns, n
   return result;
 };
 
-export const isColumnFixed = (that: ColumnsController, column) => (isDefined(column.fixed) || !column.type ? column.fixed && column.fixedPosition !== StickyPosition.Sticky : that._isColumnFixing());
+export const isColumnFixed = (that: ColumnsController, column) => {
+  const isFixedCommandColumn = column.type && column.type !== AI_COLUMN_NAME;
+
+  if (!isFixedCommandColumn) {
+    return column.fixed && column.fixedPosition !== StickyPosition.Sticky;
+  }
+
+  return that._isColumnFixing();
+};
 
 export const convertOwnerBandToColumnReference = (columns) => {
   columns.forEach((column) => {