我收到“致命错误:无法访问第1540行中的/Applications/XAMPP/xamppfiles/htdocs/cityland/application/libraries/Grocery_CRUD.php中的空属性”错误在此代码Codeigniter和Grocery CRUD - 致命错误:无法访问空属性
public function projectAmenities()
{
$crud = new grocery_CRUD();
$crud->set_theme('datatables');
$crud->set_table('tbl_sys_project_amenity');
$crud->set_relation('amenity','tbl_sys_amenities','amenity');
$crud->set_relation('project_id','tbl_sys_projects','project_id');
$crud->set_subject('Amenities');
$output = $crud->render();
$this->projectAmenitiesOutput($output);
}
tbl_sys_project_amenity是tbl_sys_amenities和tbl_sys_projects的accociative实体。此错误仅在此特定表中显示。
我的表结构
tbl_sys_amenities
amenity
description
tbl_sys_projects
project_id
title
location
tbl_sys_project_amenity
project_id
amenity
quantity