[DataGrid] Fix incorrect computation of lastPage in GridPagination (

mui#11958)

packages/x-data-grid/src/components/GridPagination.tsx

@@ -42,10 +42,10 @@ export const GridPagination = React.forwardRef<unknown, Partial<TablePaginationP
       [rootProps.rowCount, visibleTopLevelRowCount],
     );
 
-    const lastPage = React.useMemo(
-      () => Math.floor(rowCount / (paginationModel.pageSize || 1)),
-      [rowCount, paginationModel.pageSize],
-    );
+    const lastPage = React.useMemo(() => {
+      const calculatedValue = Math.ceil(rowCount / (paginationModel.pageSize || 1)) - 1;
+      return Math.max(0, calculatedValue);
+    }, [rowCount, paginationModel.pageSize]);
 
     const handlePageSizeChange = React.useCallback(
       (event: React.ChangeEvent<HTMLTextAreaElement | HTMLInputElement>) => {

packages/x-data-grid/src/tests/pagination.DataGrid.test.tsx

@@ -685,4 +685,26 @@ describe('<DataGrid /> - Pagination', () => {
       expect(getColumnValues(0)).to.deep.equal(['0', '1', '2', '3', '4']);
     });
   });
+
+  // See https://github.com/mui/mui-x/issues/11247
+  it('should not throw on deleting the last row of a page > 0', () => {
+    const columns = [{ field: 'name' }];
+    const rows = [
+      { id: 0, name: 'a' },
+      { id: 1, name: 'b' },
+      { id: 2, name: 'c' },
+      { id: 3, name: 'd' },
+    ];
+    expect(() => {
+      const { setProps } = render(
+        <DataGrid
+          columns={columns}
+          rows={rows}
+          initialState={{ pagination: { paginationModel: { pageSize: 2, page: 1 } } }}
+          pageSizeOptions={[2]}
+        />,
+      );
+      setProps({ rows: rows.slice(0, 2) });
+    }).not.to.throw();
+  });
 });