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+--- Thread: [solved] Loading model from hook - Fatal error: Call to a member function _assign_libraries() on a non-object... (/showthread.php?tid=8448)
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[solved] Loading model from hook - Fatal error: Call to a member function _assign_libraries() on a non-object... - El Forum - 05-18-2008
[eluser]differ[/eluser]
Hi,
I encountered problem in loading model/library from hook. Hook is specified on pre_controller. Is there any way to load model?
Tricks connected with:
Code:
$ci =& get_instance();
$ci->load->model('model');... does not work. When trying to load:
Code:
$this->load->model('model_name');PHP throws error:
Quote:A PHP Error was encountered
Severity: Notice
Message: Undefined property: Welcome::$model_name
Filename: libraries/Loader.php
Line Number: 980
I forgot about fatal error:
Quote:Fatal error: Call to a member function _assign_libraries() on a non-object in /system/libraries/Loader.php on line 980
My example hook controller:
Code:
class Example extends Controller
{
public function __construct()
{
parent::Controller();
}
public function hookFunc()
{
$this->load->model('model_name');
}
}... and hooks config:
Code:
$hook['pre_controller'] = array(
'class' => 'Example',
'function' => 'hookFunc',
'filename' => 'Example.php',
'filepath' => 'hooks'
);Where is the problem? Any advice will be appreciated.
[solved] Loading model from hook - Fatal error: Call to a member function _assign_libraries() on a non-object... - El Forum - 05-19-2008
[eluser]differ[/eluser]
Is it possible to do that? Maybe someone from CI Team can say something about problem?
It is very important.
[solved] Loading model from hook - Fatal error: Call to a member function _assign_libraries() on a non-object... - El Forum - 05-19-2008
[eluser]zdknudsen[/eluser]
I don't think you should extend your hooks from the Controller class. This might also be what is causing the fatal error about _assign_libraries().
Try just boiling it down to
Code:
class Example
{
public function hookFunc()
{
$ci = &get;_instance();
$ci->load->model('model_name');
}
}Note: Please notice that there is a misplaced ; in the get_instance function, that you need to remove if you copy+paste it. The forums wont let me remove it.
[solved] Loading model from hook - Fatal error: Call to a member function _assign_libraries() on a non-object... - El Forum - 05-19-2008
[eluser]wiredesignz[/eluser]
The CI core (controller) does not exist yet so using get_instance() in a pre_controller hook is not possible.
@Zach, you can use this layout in your code block.
Code:
$ci =& get_instance();[solved] Loading model from hook - Fatal error: Call to a member function _assign_libraries() on a non-object... - El Forum - 05-19-2008
[eluser]zdknudsen[/eluser]
He is quite right. You might want to try the post_controller_constructor hook instead.
@wired: Neat, it have been annoying me numerous times.
[solved] Loading model from hook - Fatal error: Call to a member function _assign_libraries() on a non-object... - El Forum - 05-20-2008
[eluser]differ[/eluser]
Nope post_controller is not right because I must load some code before controller will execute its __construct() function.
If it is not possible I must "hack" hook class and insert clear php code without diving them into models, libraries etc...
Thanks for help.
[solved] Loading model from hook - Fatal error: Call to a member function _assign_libraries() on a non-object... - El Forum - 05-20-2008
[eluser]mironcho[/eluser]
What about autoloading some library or model (config/autoload.php)? Prior to CI version 1.6, I've used this approach - I had simple DummySetNames library (libraries/dummysetnames.php) with the only task to set db connection charset:
Code:
<?php if (!defined('BASEPATH')) exit('No direct script access allowed');
class DummySetNames
{
function DummySetNames()
{
$this->ci = & get_instance();
$this->ci->db->query("SET NAMES ?", $this->ci->config->item('mysql_charset'));
}
}
?>[solved] Loading model from hook - Fatal error: Call to a member function _assign_libraries() on a non-object... - El Forum - 05-20-2008
[eluser]differ[/eluser]
Hi mironcho,
Okay but tell me when autoload is executed, after initializing hooks or before?
I need to find some workaround. It is an acl system, so I need to check user privileges before controller execute its constructor.
In hookFunc I have declared code which should verify whether user is valid and has privileges to execute specified controller or not. So I need to load libraries and models in hookFunc.
Thanks for answers.
[solved] Loading model from hook - Fatal error: Call to a member function _assign_libraries() on a non-object... - El Forum - 05-20-2008
[eluser]mironcho[/eluser]
Autoloading is done in main controller's constructor (parent::Controller()). It's executed after pre_controller hook, but before yours constructor code (if invoking parrent::Controller() is the first thing in your constructor).
Take a look at system/codeigniter/CodeIgniter.php for complete application flow...
[solved] Loading model from hook - Fatal error: Call to a member function _assign_libraries() on a non-object... - El Forum - 05-20-2008
[eluser]differ[/eluser]
I "hacked" system/libraries/Controller.php:
Code:
function Controller()
{
parent::CI_Base();
$this->_ci_initialize();
log_message('debug', "Controller Class Initialized");
// A little hack
require_once(constant('APPPATH').'/AuthClass.php');
$acl = new AuthClass;
$acl->is_authorized();
}And now when parent::Controller is executed in each controller I have simple pre_controller hook. Works great for me.
Thanks for responses.