以下是我的辅助功能(在自动加载中定义为db)
<?php
function get_categories_h(){
$CI = get_instance();
$categories = $CI->Product_model->get_categories();
return $categories;
}
模型中的功能为
public function get_categories(){
$this->db->select('*');
$this->db->from('categories');
$query = $this->db->get();
return $query->result();
}
视图中的代码为
<?php foreach(get_categories_h() as $category) : ?>
<li class="list-group-item"><a href="#"><?php echo $category->name; ?></a></li>
<?php endforeach; ?>
我得到的错误是
消息:未定义的属性:products :: $ product_model
文件名:helpers/db_helper.php
致命错误:在C: Xampp htdocs gamingplace_done application helpers helpers db_helper.php 的c: xampp htdocs gamingplace_done_done gamingplace_done_done gamingplace_done_done_done_done gamingplace_done_done gamingplace_done gamingplace_done_php
上致电get_categories()
您需要将模型加载到助手中才能访问。类似:
<?php
function get_categories_h(){
$CI = get_instance();
$CI->load->model('Product_model');
$categories = $CI->Product_model->get_categories();
return $categories;
}
您可以阅读有关如何加载它的更多信息:http://www.codeigniter.com/userguide2/general/models.html#loading
或
http://www.codeigniter.com/user_guide/general/models.html#loading-a-model
取决于您使用的CI版本。