MY Validation Callbacks into Models

Category:Libraries::Validation | Category:Libraries::Community

Setting Up: [code] $this->validation->set_rules(array( 'username' => 'trim|required|callback_users_model->is_unique[username]', 'password' => 'trim|required|matches[confirm]', ));

[/code]

The callback function in users_model [code] /** * Validation callback **/ function is_unique($value, $field) { $this->validation->set_message('users_model->is_unique', "The %s {$value} is not available. Try a different username"); return (bool)(!$this->findBy("{$field} = '{$value}'")); }

[/code]

This is a more advanced version of the previous callbacks into models extension. You may pass the calling object to the Validation class. ie: $this->validation->run($this); If not it wil use the CI super object by default.

application/libraries/MY_Validation.php [code] <?php if (!defined('BASEPATH')) exit('No direct script access allowed');

/**

• MY_Validation extension
• Allows callback functions into Models
• Usage:
• Pass the caller to the validation class
• $this->validation->run($this);
• Version 0.3 (c) Wiredesignz 2008-04-24 */

class MY_Validation extends CI_Validation { function get_fields() { return $this->_fields; }

/**
 * Run the Validator
 *
 * This function does all the work.
 *
 * @access    public
 * @return    bool
 */        
function run(&$parent = NULL)
{        
    // Do we even have any data to process?  Hmm?
    if (count($_POST) == 0 OR count($this->_rules) == 0)
    {
        return FALSE;
    }
    
    isset($parent) OR $parent = $this->CI;