将codeigniter从3.0.6升级到3.1.0

Question

Hy, I have a site based on codeigniter 3.0.6 which I am going to upgrade to 3.1.0, I downloaded the codeigniter 3.1.0 and copy my files (view, model. controller). I changed my routes.php, database.php and config.php.

I am facing an error:

A PHP Error was encountered

Severity: Notice

Message: Undefined property: Travels::$db

Filename: core/Model.php

Line Number: 77

Backtrace:

File: D:\xamp\htdocs\update\application\models\Travel.php
Line: 95
Function: __get

File: D:\xamp\htdocs\update\application\controllers\Travels.php
Line: 29
Function: all_des

File: D:\xamp\htdocs\update\application\controllers\Travels.php
Line: 41
Function: main_header

File: D:\xamp\htdocs\update\index.php
Line: 315
Function: require_once

what should I do ??

Answer 1

Try just replace the system folder with the new one.

Please refer to: Upgrading from 3.0.6 to 3.1.0