Can't acccess personnal library

Hi all ,

I've just created a library called Cms and i've follow those steps : http://www.codeigniter.com/user_guide/ge...aries.html

When i try to access function in my library i obtain error :  PHP FATAL ERROR : Call to a member function getTags() on a non-object

The controller code is :

PHP Code:

$this->load->library('Cms');
 $pageName = "index";
 $data['cms'] = $this->Cms->getTags($pageName);
 $this->load->view('accueil', $data); 


My class is :

PHP Code:

<?php defined('BASEPATH') OR exit('No direct script access allowed');

class Cms {

        public function getTags($pageName)
        {
         $query = $this->db->query("SELECT * FROM cms WHERE 'page_name' = $pageName");

 foreach ($query->result_array() as $row)
 {
        return $row;
 }
        }
} 


I've checked many times mispelled word, but everything seems to be ok !!
I'm lost !
Thank for your help !

$data['cms'] = $this->cms->getTags($pageName);
(lower C)

Thank you but it doesn't work !

You are using CI methods inside the library without instanciating the CI. Take a look here: https://codeigniter.com/user_guide/gener...ur-library

...I am reffering to the "$this->db..." part.

Website: http://avenir.ro

You are using CI methods inside the library without instanciating the CI. Take a look here: https://codeigniter.com/user_guide/gener...ur-library

...I am reffering to the "$this->db..." part.

Thank you very much it works !
Here is my new library :

PHP Code:

<?php defined('BASEPATH') OR exit('No direct script access allowed');

class Cms {

         public function __construct()
        {
                // Assign the CodeIgniter super-object
                $this->CI =& get_instance();
        }

        public function getTags($pageName)
        {
            
            $query = $this->CI->db->get_where('cms', array('page_name' => $pageName), 1);

            foreach ($query->result_array() as $row)
            {
                    return $row;
            }
        }
} 


Usually, collecting data from your database is done by a Model, not a Library.
In a model, you can use the $this->db object without instantiating the super-object.

One more tip about your method. You are looping through a result_array(), but it seems that you expect the result to be 1 record.
In that case you can return this record like this:

PHP Code:

$query = $this->CI->db->get_where('cms', array('page_name' => $pageName), 1);
return $query->row_array(); 


Usually, collecting data from your database is done by a Model, not a Library.
In a model, you can use the $this->db object without instantiating the super-object.

One more tip about your method. You are looping through a result_array(), but it seems that you expect the result to be 1 record.
In that case you can return this record like this:

PHP Code:

$query = $this->CI->db->get_where('cms', array('page_name' => $pageName), 1);
return $query->row_array(); 


Hello and thank you wouter for your help.
I don't really know how to use the personal librairies; but if i understand, i had to call a specific model in the library as we use to do in controllers ?

If i use load->model in the library i have to instanciate CI or not ?
It's not really clear for me as i develop for the first time my own library !
Thank you very much !

Hi,

In the library you extend CI as you have done.

The loader class is in the CI object, so you load the model via your CI instance:

PHP Code:

$this->CI->load->model('whatever_model'); 


The model though, as it is loaded into the CI instance, does not need to extend CI, just extends the CI_model as normal.

PHP Code:

<?php defined('BASEPATH') OR exit('No direct script access allowed');

class Example_model extends CI_Model {
 
 public function __construct()
 {
    parent::__construct();
 }
 
 public function get_user()
 {
    $this->db->from('whatever');
    // etc etc.
 }
} 


Hope that helps

Paul

Hi,

In the library you extend CI as you have done.

The loader class is in the CI object, so you load the model via your CI instance:

PHP Code:

$this->CI->load->model('whatever_model'); 


The model though, as it is loaded into the CI instance, does not need to extend CI, just extends the CI_model as normal.

PHP Code:

<?php defined('BASEPATH') OR exit('No direct script access allowed');

class Example_model extends CI_Model {
 
 public function __construct()
 {
    parent::__construct();
 }
 
 public function get_user()
 {
    $this->db->from('whatever');
    // etc etc.
 }
} 


Hope that helps

Paul

Thank you Paul for your help too. I knew i was not using an optimized way to code but it was a first shot .
Thank you veryyyy muchhhh !!