从 MySQL 获取项目数组

Question

我正在尝试从 MySQL 数据库中获取一组项目，以根据购物车 (prestashop) 中的制造商 ID 显示特定产品。我做了这个查询

 $cart_items = $cartObj->getProducts();
            if (is_array($cart_items) && count($cart_items) > 0) {
                $cart_ids = array();
                foreach ($cart_items as $cart_item) {
                    $cart_ids[] = $cart_item['id_product'];
                }

                $arrayKeys = array_keys($cart_ids);
                $cart_ids[$arrayKeys[0]];


                $id_manufacturers = Db::getInstance(_PS_USE_SQL_SLAVE_)->executeS('
                                SELECT id_manufacturer
                                FROM `'._DB_PREFIX_.'product`
                                WHERE id_product IN (' . implode(',', array_map('intval', $cart_ids)) . ')
                            ');

                $items = Db::getInstance(_PS_USE_SQL_SLAVE_)->executeS('
                select id_product
                from `'._DB_PREFIX_.'product` p
                where p.id_manufacturer IN (' . implode(',', array_map('intval', $id_manufacturers)) . ')
                '.(count($excluded_ids) ? ' AND p.id_product NOT IN (' . implode(', ', $excluded_ids) . ')' : '').'
                group by p.id_product
                limit '.(int)$limit.'
                ');

            }

什么也没有出现。我知道，当我在尝试仅从 1 个制造商处检索产品时使用 Db::getInstance->getValue in $id_category_default 时，一切正常。当我为 $items 添加测试数组时，例如 (1, 2, 3, 4, 5)，产品也会从这个制造商 ID 中显示出来。但是，当我尝试获取 id_manufacturer 的数组并显示基于该数组的产品时，什么也没有显示。有没有其他方法可以为 id_manufacturers 创建数组？

数据库结构是这样的

+------+-------+--------------------------------------------+
| id_product   | id_manufacturer   | content         |
+------+-------+--------------------------------------------+
| 1            | 1                 | ...             |
| 2            | 1                 | ...             |
| 3            | 2                 | ...             |
| 4            | 3                 | ...             |
+------+-------+--------------------------------------------+

我需要一组 id_manufacturer 个 ID，比如 (1, 2, 3)

Answer 1

试试这个代码：

$manufacturers = [];
foreach ($cart->getProducts() as $product) {
    $manufacturers[] = $product['id_manufacturer'];
}

$items = Db::getInstance(_PS_USE_SQL_SLAVE_)->executeS('
    SELECT p.`id_product`
    FROM `'._DB_PREFIX_.'product` p
    WHERE p.`id_manufacturer` IN (' . implode(',', $manufacturers) . ')
    '.(count($excluded_ids) ? ' AND p.`id_product` NOT IN (' . implode(', ', $excluded_ids) . ')' : '').'
    GROUP BY p.`id_product`
    LIMIT '.(int) $limit
);

确保使用正确的别名，有时在您的查询中检查 `` 是值得的。让我知道这是否适合你。

从 MySQL 获取项目数组

Get array of items from MySQL

php

mysql

prestashop