ecshop设置一个子类对应多个父类并指定跳转url的修改方法

　　这是一篇记录在日记里面的技术文档，其实是对ecshop的二次开发。主要作用是将一个子类对应多个父类，并指定条跳转url的功能。ecshop是一款在线购物网站，感兴趣的可以下载源码看看。我们看看具体是怎么修改的。

　　1、数据库表“表前缀_category”添加如下字段

alter  TABLE `ga_category` add `assign_child` varchar(255) default NULL;
alter  TABLE `ga_category` add `jump_url` varchar(255) default NULL;

　　2、includes/lib_goods.php

　　get_categories_tree、get_child_tree函数中的

$cat_arr[$row['cat_id']]['url'] = build_uri('category', array('cid' => $row['cat_id']), $row['cat_name']);

　　改为

if(isset($row['jump_url']) != NULL && trim($row['jump_url']) != ''){$cat_arr[$row['cat_id']]['url'] = $row['jump_url'];}else{$cat_arr[$row['cat_id']]['url'] = build_uri('category', array('cid' => $row['cat_id']), $row['cat_name']);}

　　将

$three_arr[$row['cat_id']]['cat_id'] = get_child_tree($row['cat_id']);

　　改为

if(isset($row['assign_child']) != NULL && trim($row['assign_child']) != ''){$three_arr[$row['cat_id']]['cat_id'] = get_assign_child_tree($row['assign_child']);}else{$three_arr[$row['cat_id']]['cat_id'] = get_child_tree($row['cat_id']);}

　　将将获取子类的sql

        $sql = 'SELECT cat_id,cat_name ,parent_id,is_show ' .'FROM ' . $GLOBALS['ecs']->table('category') ."WHERE parent_id = '$parent_id' AND is_show = 1 ORDER BY sort_order ASC, cat_id ASC";

　　改为（添加assign_child, jump_url两个字段用于查询用）

        $sql = 'SELECT cat_id,cat_name ,parent_id,is_show, template_file, assign_child, jump_url ' .'FROM ' . $GLOBALS['ecs']->table('category') ."WHERE parent_id = '$parent_id' AND is_show = 1 ORDER BY sort_order ASC, cat_id ASC";

　　并添加函数

function get_assign_child_tree($tree_id = ''){$three_arr = array();if($tree_id == '') return $three_arr;$child_sql = 'SELECT cat_id, cat_name, parent_id, is_show, assign_child, jump_url ' .'FROM ' . $GLOBALS['ecs']->table('category') ."WHERE cat_id in( $tree_id ) AND is_show = 1 ORDER BY sort_order ASC, cat_id ASC";$res = $GLOBALS['db']->getAll($child_sql);foreach ($res AS $row){if ($row['is_show'])$three_arr[$row['cat_id']]['id']   = $row['cat_id'];$three_arr[$row['cat_id']]['name'] = $row['cat_name'];if(isset($row['jump_url']) != NULL && trim($row['jump_url']) != ''){$three_arr[$row['cat_id']]['url'] = $row['jump_url'];}else{$three_arr[$row['cat_id']]['url']  = build_uri('category', array('cid' => $row['cat_id']), $row['cat_name']);}if (isset($row['cat_id']) != NULL){if(isset($row['assign_child']) != NULL && trim($row['assign_child']) != ''){$three_arr[$row['cat_id']]['cat_id'] = get_assign_child_tree($row['assign_child']);}else{$three_arr[$row['cat_id']]['cat_id'] = get_child_tree($row['cat_id']);}}}return $three_arr;}

　　3、admin/category.php中作如下修改

　　在($_REQUEST['act'] == 'insert')、if ($_REQUEST['act'] == 'update')的条件中的

$cat['grade'] = !empty($_POST['grade']) ? intval($_POST['grade']) : 0;
$cat['filter_attr'] = !empty($_POST['filter_attr']) ? implode(',', array_unique(array_diff($_POST['filter_attr'],array(0)))) : 0;

　　后面添加

    $cat['jump_url']     = !empty($_POST['jump_url'])     ? trim($_POST['jump_url'])      : '';$cat['assign_child'] = !empty($_POST['assign_child']) ? trim($_POST['assign_child']) : '';

　　4、在admin/templates/category_info.htm的

      <tr id="assign_child"><td class="label">{$lang.assign_child}:</td><td><input type="text" name='assign_child' value='{$cat_info.assign_child}' size="32" /></td></tr>

　　中添加

      <tr id="jump_url"><td class="label">{$lang.jump_url}:</td><td><input type="text" name='jump_url' value='{$cat_info.jump_url}' size="32" /></td></tr>

　　5、languages/zh-cn/admin/category.php中添加如下语言描述

　　$_LANG['jump_url']='跳转url（指定跳转至的url）';

　　$_LANG['assign_child']='指定子类（将其id填写在输入框中即可，多个是用应为的“,”号隔开）';