opencart首頁最新產品(Latest Products)隨機顯示方法

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opencart首頁Latest Products產品是不可控的，如果一直不上傳新產品， Latest Products顯示固定不變，不像zen-cart每次刷新都有變化。我幫牠動一下小手術。

文件位置：catalog\model\catalog\product.php.

方法一

把getLatestProducts修改成以下代碼：

1. public function getLatestProducts($limit) {
   
2. 
   
3. $query = $this->db->query("SELECT *, pd.name AS name, p.image, m.name AS manufacturer, ss.name AS stock, (SELECT AVG(r.rating) FROM " . DB_PREFIX . "review r WHERE p.product_id = r.product_id GROUP BY r.product_id) AS rating FROM " . DB_PREFIX . "product p LEFT JOIN " . DB_PREFIX . "product_description pd ON (p.p​​roduct_id = pd.product_id) LEFT JOIN " . DB_PREFIX . "product_to_store p2s ON (p.p​​roduct_id = p2s.product_id) LEFT JOIN " . DB_PREFIX . "manufacturer m ON (p.manufacturer_id = m.manufacturer_id) LEFT JOIN " . DB_PREFIX . "stock_status ss ON (p.stock_status_id = ss.stock_status_id) WHERE p.status = '1' AND p.date_available <= NOW() AND pd.language_id = '" . (int)$this->config->get('config_language_id') . "' AND p2s .store_id = '" . (int)$this->config->get('config_store_id') . "' AND ss.language_id = '" . (int)$this->config->get('config_language_id') . "' ORDER BY rand() DESC LIMIT " . (int)$limit);
   
4. 
   
5. $product_data = $query->rows;
   
6. 
   
7. return $product_data;
   
8. }

複製代碼

方法二

把getLatestProducts修改成以下代碼：

1. public function getLatestProducts($limit) {
   
2.         $product_data = $this->cache->get('product.latest.' . $this->config->get('config_language_id') . '. ' . (int)$this->config->get('config_store_id') . '.' . $limit);
   
3. 
   
4.         if (!$product_data) {
   
5. 
   
6.             $query = $this->db->query("SELECT *, pd.name AS name, p.image, m.name AS manufacturer, ss.name AS stock, (SELECT AVG(r.rating) FROM " . DB_PREFIX . "review r WHERE p.product_id = r.product_id GROUP BY r.product_id) AS rating FROM " . DB_PREFIX . "product p LEFT JOIN " . DB_PREFIX . "product_description pd ON (p.p​​roduct_id = pd.product_id) LEFT JOIN " . DB_PREFIX . "product_to_store p2s ON (p.p​​roduct_id = p2s.product_id) LEFT JOIN " . DB_PREFIX . "manufacturer m ON (p.manufacturer_id = m.manufacturer_id) LEFT JOIN " . DB_PREFIX . "stock_status ss ON (p.stock_status_id = ss.stock_status_id) WHERE p.status = '1' AND p.date_available <= NOW() AND pd.language_id = '" . (int)$this->config->get('config_language_id') . "' AND p2s .store_id = '" . (int)$this->config->get('config_store_id') . "' AND ss.language_id = '" . (int)$this->config->get('config_language_id') . "' ORDER BY rand() DESC LIMIT " . (int)$limit);
   
7. 
   
8. 
   
9.             $product_data = $query->rows;
   
10. 
    
11.             $this->cache->set('product.latest.' . $this->config->get('config_language_id') . '.' . (int)$this->config->get('config_store_id') . '.' . $limit, $product_data);
    
12.         }         return $product_data;     }

複製代碼

去前台刷新一下，看一下效果

方法一和方法二區別，方法二執行速度比方法一快。但是每次都要刪除system\cache\cache.product.latest.*這個文件才有更新。如果產品很多最好選用方法二