我的问题更多是使用mysql而不是使用Opencart。我想从数据库中检索属于category_id1和category_id2的所有产品。只有属于这两个类别的人。从一个category_id获取产品的模型就是这个。
public function getProducts($data = array()) {
$sql = "SELECT p.product_id, (SELECT AVG(rating) AS total FROM " . DB_PREFIX . "review r1 WHERE r1.product_id = p.product_id AND r1.status = '1' GROUP BY r1.product_id) AS rating, (SELECT price FROM " . DB_PREFIX . "product_discount pd2 WHERE pd2.product_id = p.product_id AND pd2.customer_group_id = '" . (int)$this->config->get('config_customer_group_id') . "' 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 " . DB_PREFIX . "product_special ps WHERE ps.product_id = p.product_id AND ps.customer_group_id = '" . (int)$this->config->get('config_customer_group_id') . "' AND ((ps.date_start = '0000-00-00' OR ps.date_start < NOW()) AND (ps.date_end = '0000-00-00' OR ps.date_end > NOW())) ORDER BY ps.priority ASC, ps.price ASC LIMIT 1) AS special";
if (!empty($data['filter_category_id'])) {
if (!empty($data['filter_sub_category'])) {
$sql .= " FROM " . DB_PREFIX . "category_path cp LEFT JOIN " . DB_PREFIX . "product_to_category p2c ON (cp.category_id = p2c.category_id)";
} else {
$sql .= " FROM " . DB_PREFIX . "product_to_category p2c";
}
if (!empty($data['filter_filter'])) {
$sql .= " LEFT JOIN " . DB_PREFIX . "product_filter pf ON (p2c.product_id = pf.product_id) LEFT JOIN " . DB_PREFIX . "product p ON (pf.product_id = p.product_id)";
} else {
$sql .= " LEFT JOIN " . DB_PREFIX . "product p ON (p2c.product_id = p.product_id)";
}
} else {
$sql .= " FROM " . DB_PREFIX . "product p";
}
$sql .= " LEFT JOIN " . DB_PREFIX . "product_description pd ON (p.product_id = pd.product_id) LEFT JOIN " . DB_PREFIX . "product_to_store p2s ON (p.product_id = p2s.product_id) WHERE pd.language_id = '" . (int)$this->config->get('config_language_id') . "' AND p.status = '1' AND p.date_available <= NOW() AND p2s.store_id = '" . (int)$this->config->get('config_store_id') . "'";
if (!empty($data['filter_category_id'])) {
if (!empty($data['filter_sub_category'])) {
$sql .= " AND cp.path_id = '" . (int)$data['filter_category_id'] . "'";
} else {
$sql .= " AND p2c.category_id = '" . (int)$data['filter_category_id'] . "'";
}
if (!empty($data['filter_filter'])) {
$implode = array();
$filters = explode(',', $data['filter_filter']);
foreach ($filters as $filter_id) {
$implode[] = (int)$filter_id;
}
$sql .= " AND pf.filter_id IN (" . implode(',', $implode) . ")";
}
}
if (!empty($data['filter_name']) || !empty($data['filter_tag'])) {
$sql .= " AND (";
if (!empty($data['filter_name'])) {
$implode = array();
$words = explode(' ', trim(preg_replace('/\s+/', ' ', $data['filter_name'])));
foreach ($words as $word) {
$implode[] = "pd.name LIKE '%" . $this->db->escape($word) . "%'";
}
if ($implode) {
$sql .= " " . implode(" AND ", $implode) . "";
}
if (!empty($data['filter_description'])) {
$sql .= " OR pd.description LIKE '%" . $this->db->escape($data['filter_name']) . "%'";
}
}
if (!empty($data['filter_name']) && !empty($data['filter_tag'])) {
$sql .= " OR ";
}
if (!empty($data['filter_tag'])) {
$sql .= "pd.tag LIKE '%" . $this->db->escape($data['filter_tag']) . "%'";
}
if (!empty($data['filter_name'])) {
$sql .= " OR LCASE(p.model) = '" . $this->db->escape(utf8_strtolower($data['filter_name'])) . "'";
$sql .= " OR LCASE(p.sku) = '" . $this->db->escape(utf8_strtolower($data['filter_name'])) . "'";
$sql .= " OR LCASE(p.upc) = '" . $this->db->escape(utf8_strtolower($data['filter_name'])) . "'";
$sql .= " OR LCASE(p.ean) = '" . $this->db->escape(utf8_strtolower($data['filter_name'])) . "'";
$sql .= " OR LCASE(p.jan) = '" . $this->db->escape(utf8_strtolower($data['filter_name'])) . "'";
$sql .= " OR LCASE(p.isbn) = '" . $this->db->escape(utf8_strtolower($data['filter_name'])) . "'";
$sql .= " OR LCASE(p.mpn) = '" . $this->db->escape(utf8_strtolower($data['filter_name'])) . "'";
}
$sql .= ")";
}
if (!empty($data['filter_manufacturer_id'])) {
$sql .= " AND p.manufacturer_id = '" . (int)$data['filter_manufacturer_id'] . "'";
}
$sql .= " GROUP BY p.product_id";
$sort_data = array(
'pd.name',
'p.model',
'p.quantity',
'p.price',
'rating',
'p.sort_order',
'p.date_added'
);
if (isset($data['sort']) && in_array($data['sort'], $sort_data)) {
if ($data['sort'] == 'pd.name' || $data['sort'] == 'p.model') {
$sql .= " ORDER BY LCASE(" . $data['sort'] . ")";
} elseif ($data['sort'] == 'p.price') {
$sql .= " ORDER BY (CASE WHEN special IS NOT NULL THEN special WHEN discount IS NOT NULL THEN discount ELSE p.price END)";
} else {
$sql .= " ORDER BY " . $data['sort'];
}
} else {
$sql .= " ORDER BY p.sort_order";
}
if (isset($data['order']) && ($data['order'] == 'DESC')) {
$sql .= " DESC, LCASE(pd.name) DESC";
} else {
$sql .= " ASC, LCASE(pd.name) ASC";
}
if (isset($data['start']) || isset($data['limit'])) {
if ($data['start'] < 0) {
$data['start'] = 0;
}
if ($data['limit'] < 1) {
$data['limit'] = 20;
}
$sql .= " LIMIT " . (int)$data['start'] . "," . (int)$data['limit'];
}
$product_data = array();
$query = $this->db->query($sql);
foreach ($query->rows as $result) {
$product_data[$result['product_id']] = $this->getProduct($result['product_id']);
}
return $product_data;
}
我在数据数组中传递了第二个filter_category_id但是如何使用它？ ：d 我在phpmyadmin中尝试了这个简单的代码，并得到了我想要的结果，但我不知道必须在这个模型中使用它。
SELECT `product_id` FROM `oc_product_to_category` WHERE `category_id` = x UNION SELECT `product_id` FROM `oc_product_to_category` WHERE `category_id` = y
我的另一个想法是对getProducts方法进行两次调用，每个类别对应一个category_id，并保留常用产品。这可行，但我认为在性能方面不好。
对不起，我很抱歉。提前感谢您的帮助。
乔治