我试图在OpenCart v3的产品页面中显示每种产品的销售单位,但我一直收到以下错误
致命错误:未捕获错误:调用成员函数getUnitsSold() 在null中 /Applications/XAMPP/xamppfiles/htdocs/store/catalog/controller/product/product.php:157 堆栈跟踪:#0 /Applications/XAMPP/xamppfiles/htdocs/store/system/engine/action.php(79): ControllerProductProduct-> index()#1 /Applications/XAMPP/xamppfiles/htdocs/store/catalog/controller/startup/router.php(25): 动作 - >执行(对象(注册表))#2 /Applications/XAMPP/xamppfiles/htdocs/store/system/engine/action.php(79): ControllerStartupRouter-> index()#3 /Applications/XAMPP/xamppfiles/htdocs/store/system/engine/router.php(67): 动作 - >执行(对象(注册表))#4 /Applications/XAMPP/xamppfiles/htdocs/store/system/engine/router.php(56): Router-> execute(Object(Action))#5 /Applications/XAMPP/xamppfiles/htdocs/store/system/framework.php(168): Router-> dispatch(Object(Action),Object(Action))#6 /Applications/XAMPP/xamppfiles/htdocs/store/system/startup.php(104): require_once(' / Applications / X ...')#7 /Applications/XAMPP/xamppfiles/htdocs/store/index.php(19):in /Applications/XAMPP/xamppfiles/htdocs/store/catalog/controller/product/product.php 在第157行
到目前为止我所拥有的是
目录/模型/目录/ product.php
public function getUnitsSold($product_id) {
$query = $this->db->query("SELECT SUM(op.quantity) AS total FROM `" . DB_PREFIX . "order_product` op LEFT JOIN `" . DB_PREFIX . "order` o ON (op.order_id = o.order_id) WHERE o.order_status_id > '0' AND op.product_id = '" . (int)$product_id . "'");
if ($query->row) {
return $query->row['total'];
} else {
return FALSE;
}
}
和目录/ controller / product / product.php
$data['text_units_sold'] = $this->language->get('text_units_sold');
$this->data['units_sold'] = $this->model_catalog_product->getUnitsSold($product_id);
任何人都可以发现问题和解决方案。
感谢。
答案 0 :(得分:0)
我怀疑在你调用getUnitsSold的函数中,你没有做过
$this->load->model('catalog/product');