Codeigniter form validation callback not working

I’m trying to extend the validation class with my own function but it seems to skip the check.

My code

public function login_validation(){
 $this->load->library('form_validation');
 $this->form_validation->set_rules('email', 'Email', 'trim|required|valid_email|xss_clean|callback_validate_credentails');
 $this->form_validation->set_rules('password', 'Password', 'trim|required|md5');
    if($this->form_validation->run()){
        #redirect('home');
        //Just to check 
        echo "login success";
    }
    else{
        $this->load->view('view_login');
    }
}

My validate credentails function goes like this;

public function validate_credentials(){
   //loads model_user
   $this->load->model('model_users');
   //checks if login_validate function in model_users return true
    if($this->model_users->login_validate()){
        return true;
    }
    else{
        //set validation message
        $this->form_validation->set_message('validate_credentails','Incorrect Username/Password');
        return false;
    }

}

My login_validate function in model_users if needed;

public function login_validate(){
    $this->db->where('email', $this->input->post('email'));
    $this->db->where('password', md5($this->input->post('password')));
    $query = $this->db->get('users');
    if($query->num_rows() == 1){
        return true;
    }
    else {
        return false; 
        }

}

This is the first time i’ve had this problem, am i doing something wrong? I’ve spent too much time on this ๐Ÿ™

Answer

I just found the solution. I needed to change the name of the form_validation class as Nish suggested and add this function.

class MY_Form_validation extends CI_Form_validation {
    function run($module = '', $group = ''){
        is_object($module) AND $this->CI = &$module;
        return parent::run($group);
    }
} 

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