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09-03-2010, 12:40 PM

[eluser]Frank V[/eluser]
I'm attempting to follow a tutorial to learn how to use CodeIgniter. (http://www.devshed.com/c/a/PHP/Building-...Framework/) For my reasons, I've decided to learn from 2.0.0-Dev (which I realize the tutorials are written for ~1.7.x). (Note: I'm using Changeset: 476bf5866ee4)

Nevertheless, I figure I'll learn the product better if I use the newest and have to figure out the differences between 1.7.x and 2.0.0-Dev.

Ok, that said -- I've run in to a problem that I do not understand. Quick info about me, I'm not an extremely experienced PHP coder. I'm coming from Django and Python. That said, I do know most of the basics about PHP (I think).

I'm utilizing the latest version of WAMP (PHP 5.3, MySQL 5.1) & I'm developing on Windows 7. (I added xdebug to php)

The exact error I'm getting is as follows:

Code:
(!) Fatal error: Cannot redeclare class tOSU_Users in C:\wamp\www\codeigniter\application\models\tosu_users.php on line 32

Call Stack

#    Time    Memory    Function    Location

1    0.0004    380320    {main}( )    ..\index.php:0

2    0.0012    439216    require_once( 'C:\wamp\www\codeigniter\system\core\CodeIgniter.php' )    ..\index.php:163

3    0.0109    1121592    tOSU_Users->tOSU_Users( )    ..\CodeIgniter.php:281

4    0.0154    1366104    CI_Loader->model( )    ..\tosu_users.php:9

The crux of the error is: "Cannot re-declare class tOSU_Users in C:\wamp\www\codeigniter\application\models\tosu_users.php on line 32". (line 32 is the last line and is blank) The tutorial had me naming the model class as 'users' and I changed it to tosu_users to ensure there isn't a new class (in 2.0.0-dev that is called users.)

Here is my full source code for the model (tosu_users.php):

Code:
&lt;?php

    class tOSU_Users extends CI_Model {

        function tOSU_Users() {

            //call constructor

            parent::CI_Model();

            //load the DB class and connect.

            $this->load->database();

        }

        function getAllUsers() {

            $query = $this->db->get('Users');

            if( $query->num_rows() > 0 ) {

                //return result set as associative array

                return $query->result_array();

            }

            return null;

        }

        function getUsersWhere( $field, $param ) {

            $this->db->where($field, $param);

            $query = $this->db->get('Users');

            //return result set as an associtive array

            return $query->result_array();

        }

        // get total number of users

        function getNumUsers() {

            return $this->db->count_all('Users');

        }

    }

?&gt;

Controller (tosu_users.php):

Code:
&lt;?php

    class tOSU_Users extends Controller {

        function tOSU_Users() {

            // call parent...

            parent::Controller();

            //load the 'Users' model.

            $this->load->model('tOSU_Users');

        }

        function index() {

            //Store data for being displayed on view file

            $data['users'] = $this->Users->getUsers();

            $data['numusers'] = $this->Users->getNumUsers();

            $data['title'] = "Displaying user data";

            $data['header'] = "User List";

            // load the view

            $this->load->view('users_view', $data);

        }

    }

?&gt;

View (users_view.php):

Code:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

&lt;html &gt;

&lt;head&gt;

    &lt;meta http-equiv="Content-Type" content="text/html; charset=utf-8" /&gt;

    &lt;title&gt;&lt;?php echo $title;?&gt;&lt;/title&gt;

&lt;/head&gt;

&lt;body&gt;

    <h1>&lt;?php echo $header; ?&gt;</h1>

    <ul>

        &lt;?php foreach($users as $user): ?&gt;

        <li>

            <p>

                &lt;?php echo 'Full name: ' . $user['firstname'].' '.$user['lastname'] . ' Email: '.$user['email'];?&gt;</p></li>

        &lt;?php endforeach; ?&gt;

    </ul>

    <p>&lt;?php echo 'Total number of users: $numusers'; ?&gt;</p>

&lt;/body&gt;

&lt;/html&gt;

Any help or thoughts would be appreciated, thank you.

09-03-2010, 01:04 PM

[eluser]mi6crazyheart[/eluser]
Make a small change in u'r controller file. Try it & tell me...

Code:
&lt;?php

    class tOSU_Users extends Controller {

        function tOSU_Users() {

            // call parent...

            parent::Controller();

            //load the 'Users' model.

            $this->load->model('tOSU_Users');

        }

        function index() {

            //Store data for being displayed on view file

            $data['users'] = $this->tOSU_Users->getUsers(); // doubt at this place as no model function by "getUsers" present in side of u'r model. So change it accordingly 

            $data['numusers'] = $this->tOSU_Users->getNumUsers();

            $data['title'] = "Displaying user data";

            $data['header'] = "User List";

            // load the view

            $this->load->view('users_view', $data);

        }

    }

?&gt;

09-03-2010, 01:09 PM

[eluser]Frank V[/eluser]
Thank you for your response.

I made the adjustment as you suggested but I'm still getting the same error. Here is the revised controller...

Code:
&lt;?php

    class tOSU_Users extends Controller {

        function tOSU_Users() {

            // call parent...

            parent::Controller();

            //load the 'Users' model.

            $this->load->model('tOSU_Users');

        }

        function index() {

            //Store data for being displayed on view file

            $data['users'] = $this->Users->getAllUsers(); //Updated

            $data['numusers'] = $this->Users->getNumUsers();

            $data['title'] = "Displaying user data";

            $data['header'] = "User List";

            // load the view

            $this->load->view('users_view', $data);

        }

    }

?&gt;

09-03-2010, 01:19 PM

[eluser]mi6crazyheart[/eluser]
Hey, u might've forget to mark one more thing in my suggested controller & that is...
When u r accessing any model function u'r doing this

Code:
$this->Users->getAllUsers();

But, as u'r model file name is "tOSU_Users.php", the above code piece will be like this:

Code:
$this->tOSU_Users->getAllUsers();

So, change this thing also inside of u'r controller & execute u'r script...

09-03-2010, 01:23 PM

[eluser]Frank V[/eluser]
Good call -- I missed that. I made the change but it didn't change anything with regards to my error. Nevertheless, thanks for pointing that out.

09-03-2010, 01:42 PM

[eluser]kaejiavo[/eluser]
Hi,
your model class and controller class have the same name. i think this is not working. try renaming one of them.

Marco

09-03-2010, 01:46 PM

[eluser]Frank V[/eluser]
Mawi27, thanks. That did it.

All the tutorials seemed to use the same name for the model and controller. I had been working under the assumption that that was a requirement of the framework.

Anyway, thanks again!