PrestaShop 中的表ps_category_product
具有以下结构
# Obtained using SHOW CREATE TABLE `ps_category_product`
CREATE TABLE `ps_category_product` (
`id_category` int(10) unsigned NOT NULL,
`id_product` int(10) unsigned NOT NULL,
`position` int(10) unsigned NOT NULL DEFAULT '0',
KEY `category_product_index` (`id_category`,`id_product`),
KEY `id_product` (`id_product`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;
对我来说不是很清楚,但似乎字段id_category
和id_product
表之间应该是唯一的,但由于某种原因 MySQL 允许我插入重复项:
mysql> select * from ps_category_product limit 10;
+-------------+------------+----------+
| id_category | id_product | position |
+-------------+------------+----------+
| 11 | 1 | 1 |
| 11 | 2 | 1 |
| 11 | 3 | 1 |
| 11 | 4 | 1 |
| 11 | 5 | 1 |
| 11 | 6 | 1 |
| 11 | 7 | 1 |
| 11 | 8 | 1 |
| 11 | 9 | 1 |
| 11 | 10 | 1 |
+-------------+------------+----------+
10 rows in set (0.00 sec)
mysql> INSERT INTO `ps_category_product` VALUES(11, 1, 1);
Query OK, 1 row affected (0.05 sec)
我怎样才能防止这种情况发生?
稍后编辑
这是prestashop中的一个错误。看看http://forge.prestashop.com/browse/PSCFI-4397