Form Validation Showing 2 Callback Messages - codeigniter

Question

I am trying to set my own callback message for codeigniter. But when I try to make my own it will show both messages codeigniter one and my custom one. Here is a link to my errors are showing up the top error is one that I would like to use http://postimg.org/image/v9ilejmnt/
How am I able to make it only show my custom error message?
I also use hmvc so I have had to add run($this) in the form validation to make callback work.
Controller:
<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
class Login extends Controller {
private $error = array();
public function __construct() {
parent::__construct();
$this->load->library('user');
$this->load->library('form_validation');
$this->lang->load('common/login', 'english');
if($this->session->userdata('user_id')) {
redirect('dashboard');
} else {
return false;
redirect('login');
}
}
public function index() {
$this->form_validation->set_rules('username', 'Username', 'required|min_length[4]|max_length[12]|xss_clean|callback_validate');
$this->form_validation->set_rules('password', 'Password', 'required|xss_clean');
if($this->form_validation->run($this) == false) {
if (array_key_exists('warning', $this->error)) {
$data['error_warning'] = $this->error['warning'];
} else {
$data['error_warning'] = '';
}
$data['action'] = site_url('login');
$this->load->view('common/login', $data);
} else {
redirect('dashboard');
}
}
function validate() {
$username = $this->input->post('username');
$password = $this->input->post('password');
if ($this->user->login($username, $password)) {
return true;
} else {
$this->error['warning'] = $this->lang->line('error_login');
return !$this->error;
}
}
}
View
<?php echo modules::run('common/header/index');?>
<div class="container">
<div class="row">
<div class="col-lg-6 col-lg-offset-3 col-md-4 col-md-offset-4 col-sm-offset-4 col-sm-4">
<div class="panel panel-default">
<div class="panel-heading"><h2 class="panel-title">Administration Login</h2></div>
<div class="panel-body">
<?php if ($error_warning) { ?>
<div class="alert alert-danger"><i class="fa fa-exclamation-circle"></i> <?php echo $error_warning; ?>
<button type="button" class="close" data-dismiss="alert">×</button>
</div>
<?php } ?>
<form action="<?php echo $action;?>" method="post" enctype="multipart/form-data">
<div class="form-group">
<div class="input-group"><span class="input-group-addon"><i class="fa fa-user"></i> </span>
<input type="text" name="username" value="" placeholder="Username" class="form-control" size="50" />
</div>
<?php echo form_error('username', '<div class="text-danger">', '</div>'); ?>
</div>
<div class="form-group">
<div class="input-group"><span class="input-group-addon"><i class="fa fa-lock"></i></span>
<input type="password" name="password" value="" placeholder="Password" class="form-control"/>
</div>
<?php echo form_error('password', '<div class="text-danger">', '</div>'); ?>
</div>
<div class="form-group">
<div class="text-right">
<button type="submit" class="btn btn-primary"><i class="fa fa-key"></i> Login</button>
</div>
</div>
</form>
</div><!--/. Panel Body -->
</div><!--/. Panel Panel Default -->
</div>
</div>
</div>
<?php echo modules::run('common/footer/index');?>

Answer 1

you forgot to set error message for your your callback.
$this->form_validation->set_message('validate', 'invalid username or password');
return FALSE;
or you can do
$this->form_validation->set_message('validate', $this->lang->line('error_login'));
return FALSE;
in your view file you are showing errors for each fields (CI form validation messages) as well as your own <?php echo $error_warning; ?>
you should use following code
function validate() {
$username = $this->input->post('username');
$password = $this->input->post('password');
if ($this->user->login($username, $password)) {
return true;
} else {
$this->form_validation->set_message('validate', $this->lang->line('error_login'));
return FALSE;
}
and remove this block from view
<?php if ($error_warning) { ?>
<div class="alert alert-danger"><i class="fa fa-exclamation-circle"></i> <?php echo $error_warning; ?>
<button type="button" class="close" data-dismiss="alert">×</button>
</div>
<?php } ?>
}
and remove this too
if (array_key_exists('warning', $this->error)) {
$data['error_warning'] = $this->error['warning'];
} else {
$data['error_warning'] = '';
}

Answer 2

I worked it out today. When want to use both validation methods custom and form validation can not use callbacks.
public function index() {
$this->form_validation->set_rules('username', 'Username', 'required|min_length[4]|max_length[12]');
$this->form_validation->set_rules('password', 'Password', 'required|xss_clean');
if($this->form_validation->run($this) == false) {
$data['title'] = $this->lang->line('heading_title');
$data['text_heading'] = $this->lang->line('text_heading');
if (array_key_exists('warning', $this->error)) {
$data['error_warning'] = $this->error['warning'];
} else {
$data['error_warning'] = '';
}
$data['action'] = site_url('login');
$this->load->view('common/login', $data);
} else {
if($this->validate()) {
redirect('dashboard');
} else {
$data['title'] = $this->lang->line('heading_title');
$data['text_heading'] = $this->lang->line('text_heading');
if (array_key_exists('warning', $this->error)) {
$data['error_warning'] = $this->error['warning'];
} else {
$data['error_warning'] = '';
}
$data['action'] = site_url('login');
$this->load->view('common/login', $data);
}
}
}