Can't log in to admin dashboard - codeigniter

Question

My password and username are correct, but I can't login to admin. Is there anything wrong with my controller?
This is my model:
class login_model extends CI_Model{
function cek($username, $password){
$this->db->where("username", $username);
$this->db->where("password", $password);
return $this->db->get("user_admin");
}
function getLoginData($usr, $psw){
$u = $usr;
$p = md5($psw);
$q_cek_login = $this->db->get_where('user_admin', array('username' => $u, 'password' => $p));
if(count($q_cek_login->result()) > 0){
foreach($q_cek_login->result() as $qck){
foreach($q_cek_login->result() as $qad){
$sess_data['logged_in'] = TRUE;
$sess_data['id'] = $qad->id;
$sess_data['username'] = $qad->username;
$sess_data['password'] = $qad->password;
$sess_data['email'] = $qad->email;
$sess_data['level'] = $qad->level;
$this->session->set_userdata($sess_data);
}
redirect('welcome_message');
}
}else{
$this->session->set_flashdata('result_login'. 'username dan password salah');
header('location: '. base_url(). 'login');
}
}
}
This is my controller:
class login extends CI_Controller {
function _construct(){
parent::_construct();
if($this->session->userdata('username')){
redirect(base_url('welcome_message'));
}
$this->load->model(array('login_model'));
}
function index(){
$this->load->view('login');
}
function proses(){
$this->form_validation->set_rules('username', 'username', 'required|trim|xss_clean');
$this->form_validation->set_rules('password', 'password', 'required|trim|xss_clean');
if($this->form_validation->run() == FALSE){
$this->load->view('login');
}else{
$usr = $this->input->post('username');
$psw = $this->input->post('password');
$u = $usr;
$p = md5($psw);
$cek = $this->login_model->cek($u, $p);
if($cek->num_rows() > 0 ){
foreach($cek->result() as $qad){
$sess_data['id'] = $qad->id;
$sess_data['email'] = $qad->email;
$sess_data['username'] = $qad->username;
$sess_data['level']=$qad->level;
$this->session->set_userdata($sess_data);
}
$this->session->set_flashdata('success', 'login berhasil');
redirect(base_url('/'));
}else{
$this->session->set_flashdata('result_login', 'username dan password yang anda masukkan salah');
redirect(base_url('login'));
}
}
}
My view:
<div class="login-box-body">
<p class="login-box-msg">Sign in to start your session</p>
<form action="<?php echo base_url('login/proses'); ?>" method="post">
<?php if (validation_errors() || $this->session->flashdata('result_login')) { ?>
<div class="alert alert-danger animated fadeInDown" role="alert">
<button type="button" class="close" data-dismiss="alert">×</button>
<strong>Peringatan!</strong>
<?php echo validation_errors(); ?>
<?php echo $this->session->flashdata('result_login'); ?>
</div>
<?php } ?>
<div class="form-group has-feedback">
<input type="text" class="form-control" placeholder="Username" id="username" name="username">
<span class="glyphicon glyphicon-user form-control-feedback"></span>
</div>
<div class="form-group has-feedback">
<input type="password" class="form-control" placeholder="Password" id="password" name="password">
<span class="glyphicon glyphicon-lock form-control-feedback"></span>
</div>
<div class="row">
<div class="col-xs-8">
Register a new admin
</div>
When I try to log in, I always get this error:

Answer 1

I don't see anything strikingly wrong with your code.
Well you are obviously hitting your last nested else which means for some reason this statement $cek->num_rows() > 0 is evaluating to false.
I assume that you are entering a proper and existing username + password combination. But to troubleshoot you can after $p = md5($psw); do:
echo 'hashed password: ' . $p . '<br>username: ' . $u; exit;
and see if the username and hashed password match something in the database, if not, you have your answer. My best guess is that you perhaps didn't store a hashed password and only plain-text one.
As a side note you should move all of your redirects and flashdata out of your model. Models should only return or throw Exceptions.