/**
     * @\app\admin\service\annotation\NodeAnotation(title="导出")
     */
    public function export()
    {
        list($page, $limit, $where) = $this->buildTableParames();


        $this->model = $this->model{{relationIndexMethod}};

        $fields = $this->request->param('fields', '{}', null);
        $image_fields = $this->request->param('image_fields', '{}', null);
        $select_fields = $this->request->param('select_fields', '{}', null);
        $date_fields = $this->request->param('date_fields', '{}', null);

        $fields = json_decode($fields, true);
        $image_fields = json_decode($image_fields, true);
        $select_fields = json_decode($select_fields, true);
        $date_fields = json_decode($date_fields, true);

        $content = \app\common\tools\ExportTools::excel($this->model, $where, $fields, $image_fields, $select_fields, $date_fields);

        return download($content, $this->model->getName() . date('YmdHis') . '.xlsx', true);
    }