";var_dump($export_arr);exit;
        return $export_arr;
    }

    //获取所有字段
    private function &all_columns()
    {
        //finder扩展字段
        $func_columns = $this->func_columns();

        //新方式扩展字段
        $extra_columns = array();
        if (is_array($this->extra_cols) && count($this->extra_cols) > 0) {
            $extra_columns = $this->extra_cols;
        }

        //额外导出扩展字段
        $export_extra_columns = array();
        if (is_array($this->export_extra_cols) && count($this->export_extra_cols) > 0) {
            $export_extra_columns = $this->export_extra_cols;
        }

        //表结构原声字段
        $columns = array();
        foreach ((array) $this->dbschema['in_list'] as $key) {
            $columns[$key] = &$this->dbschema['columns'][$key];
        }

        //合并所有字段
        $return = array_merge((array) $func_columns, (array) $extra_columns, (array) $export_extra_columns, (array) $columns);
        foreach ($return as $k => $r) {
            if (!$r['order']) {
                $return[$k]['order'] = 100;

            }
            $orders[] = $return[$k]['order'];
        }
        array_multisort($orders, SORT_ASC, $return);
        return $return;
    }

    //取finder里定义的扩展字段
    private function &func_columns()
    {
        if (!isset($this->func_list)) {
            $default_with    = app::get('desktop')->getConf('finder.thead.default.width');
            $return          = array();
            $this->func_list = &$return;

            foreach ($this->addon_columns as $k => $function) {
                $func['type']  = 'func';
                $func['width'] = $function[0]->{$function[1] . '_width'} ? $function[0]->{$function[1] . '_width'} : $default_with;
                $func['label'] = $function[0]->{$function[1]};
                if ($function[0]->{$function[1] . '_order'} == COLUMN_IN_TAIL) {
                    $func['order'] = 100;
                } elseif ($function[0]->{$function[1] . '_order'} == COLUMN_IN_HEAD) {
                    $func['order'] = 1;
                } else {
                    $func['order'] = $function[0]->{$function[1] . '_order'};
                }

                $func['ref']         = $function;
                $func['sql']         = '1';
                $func['order_field'] = '';
                if ($function[0]->{$function[1] . '_order_field'}) {
                    $func['order_field'] = $function[0]->{$function[1] . '_order_field'};
                }
                $func['alias_name'] = $function[1];
                if ($func['label']) {
                    //只有有名称，才能被显示
                    $return[$function[1]] = $func;
                }
            }
        }
        return $this->func_list;
    }
}