[eluser]momen[/eluser]
when used Nested sets
show this error
A PHP Error was encountered
Severity: Notice
Message: Undefined property: Categories_demo_model::$db
Filename: models/Nested_sets_model.php
Line Number: 291
Fatal error: Call to a member function query() on a non-object in H:\xampp\htdocs\codeigniter\system\application\models\Nested_sets_model.php on line 291