我“继承”了 OpenCart 1.5.2.1 的现有和工作安装。
为了测试目的，我想在我的本地服务器上建立一个开发站点。所以我在本地安装并复制了数据库。
我可以毫无问题地登录后端 - 商店已设置，所有产品和类别也都在那里。
在前端，我可以访问商店的主页，并且类别列表正确显示，包括每个类别的产品数量。
但是，当我尝试查看类别列表或单个产品时，我得到一个空白页面。
我没有收到 PHP 错误 - 我附加了
display_errors = 1;
error_reporting = E_ALL;
log_errors = 1;
到购物车根文件夹中的 php.ini。
在 OpenCart 错误日志中，我收到以下错误消息：
2013-03-13 18:51:15 - PHP Notice: Error: Column 'product_id' cannot be null<br />Error No: 1048<br />SELECT DISTINCT *, p [...] AND p2s.store_id = '5' in /path/to/root/system/database/mysql.php on line 49
知道如何解决这个问题吗？
** 更新： **
完整的查询是：
SELECT DISTINCT *, pd.name, pd.creator, pd.keyword, pd.circa, pd.year, pd.century, pd.decade, pd.scenelocation, pd.fm_quicksearch AS fm_quicksearch, p.image, m.name AS manufacturer, (SELECT price FROM product_discount pd2 WHERE pd2.product_id = p.product_id AND pd2.customer_group_id = '8' AND pd2.quantity = '1' AND ((pd2.date_start = '0000-00-00' OR pd2.date_start < NOW()) AND (pd2.date_end = '0000-00-00' OR pd2.date_end > NOW())) ORDER BY pd2.priority ASC, pd2.price ASC LIMIT 1) AS discount, (SELECT price FROM product_special ps WHERE ps.product_id = p.product_id AND ps.customer_group_id = '8' AND ((ps.date_start = '0000-00-00' OR ps.date_start < NOW()) AND (ps.date_end = '0000-00-00' OR ps.date_end > NOW())) ORDER BY ps.priority ASC, ps.price ASC LIMIT 1) AS special, (SELECT points FROM product_reward pr WHERE pr.product_id = p.product_id AND customer_group_id = '8') AS reward, (SELECT ss.name FROM stock_status ss WHERE ss.stock_status_id = p.stock_status_id AND ss.language_id = '1') AS stock_status, (SELECT wcd.unit FROM weight_class_description wcd WHERE p.weight_class_id = wcd.weight_class_id AND wcd.language_id = '1') AS weight_class, (SELECT lcd.unit FROM length_class_description lcd WHERE p.length_class_id = lcd.length_class_id AND lcd.language_id = '1') AS length_class, (select (r.sum + p.rat)/(r.tot + p.tot) from (select COALESCE(j.sum,0) as sum , COALESCE(j.tot,0) as tot from (select SUM(rating) as sum , COUNT(rating) as tot, product_id from rating where product_id = '9206' group by product_id) j right join product on product.product_id = j.product_id where product.product_id = '9206') r, (select product_id, COALESCE(rating,0) as rat, count(rating) as tot from product where product_id = '9206' and rating > 0) p ) AS rating, p.sort_order FROM product p LEFT JOIN product_description pd ON (p.product_id = pd.product_id) LEFT JOIN product_to_store p2s ON (p.product_id = p2s.product_id) LEFT JOIN manufacturer m ON (p.manufacturer_id = m.manufacturer_id) WHERE p.product_id = '9206' AND pd.language_id = '1' AND p.status = '1' AND p.date_available <= NOW() AND p2s.store_id = '5'
更新
我怀疑它与 MySQL 或 PHP 配置有关。因为当我在实时站点上运行相同的查询时，它可以正常工作。
更新
该问题与我的本地 MySQL 安装有关。使用在线数据库时一切正常。OpenCart 论坛中的某个人 - Link to Post指出以下内容：
此错误源于对特定贡献的插入查询，作者 > 未经测试尝试添加自动递增字段将拒绝的空语句 > 特别是从 mySQL 5.1+ 开始。来自 mySQL 开发人员的这种方法已在 > 多年前被阻止。
联系作者通过说明自动递增字段不需要在查询中解决此问题，因为它已经与执行的查询一起自动创建递增值。
可能是沿着这些路线。查询本身不是插入，但很可能与此有关。我会进一步调查此事。