Codeigniter Vote Candidate System

Hai, i'm new in codeigniter and i want to create a vote candidate system as my thesis. I want to create function each user can vote 1 candidate only, and after user vote the candidate the user status will be change from '1' to '0'.
1= its mean user can vote
0= its mean user can't vote.

i already try to create it, but doesnt work.

Can someone help me ?
Big thanks from me.

Here is my code.

PHP Code:

<?php
defined('BASEPATH') OR exit('No direct script access allowed');
 

class Admin_calon extends CI_Controller
{
 
    function __construct() {
        parent::__construct();
 
       
        
        $this->load->model('Admin_dcalon');
        $this->load->model('Admin_dvoter');
        $this->load->model('Voter_model');
        $this->load->helper('url');
        $this->load->database();
       
    }
 
    public function index() {
        $data['calon'] = $this->Admin_dcalon->tampil_data()->result();
        $this->load->view('Admin_calon',$data);
        
    }
    
    function tambah_calon(){
        $nama = $this->input->post('nama');
        
                $config['upload_path'] = base_url(). './uploads/';
                $config['allowed_types'] = 'jpg|png|jpeg';
                $config['max_size'] = '0';
                
                $this->load->library('upload', $config);
                $this->upload->initialize($config);
                $this->upload->do_upload();
                
        $img = $this->input->post('img');
        
 
        $data = array(
            'nama' => $nama,
            'img' => $img,
            'voted' => 0
            );
        $this->session->set_flashdata('msg','<div class="alert alert-success text-center">Data Tersimpan</div>');
        $this->Admin_dcalon->tambah_data($data,'calon');
        redirect('Admin_calon');
    }
    
    
    public function delete_calon($id_calon){
        $where = array('id_calon' => $id_calon);
        $this->Admin_dcalon->hapus_data($where,'calon');
         $this->session->set_flashdata('msg','<div class="alert alert-danger text-center">Data Terhapus</div>');
        redirect('Admin_calon');
    }
 
     function edit_calon($id_calon){
        $where = array('id_calon' => $id_calon);
        $data['calon'] = $this->Admin_dcalon->edit_data($where,'calon')->result();
        $this->load->view('Admin_ecalon',$data);
    }
    
    function update_calon(){
    $id_calon = $this->input->post('id_calon');
    $nama = $this->input->post('nama');
    $img = $this->input->post('img');

    $data = array(
        'nama' => $nama,
        'img' => $img,        
    );

    $where = array(
        'id_calon' => $id_calon
    );
    $this->session->set_flashdata('msg','<div class="alert alert-info text-center">Perubahan Tersimpan</div>');
    $this->Admin_dcalon->update_data($where,$data,'calon');
    redirect('Admin_calon');
}

function vote_calon(){
   $id_calon = $this->input->post('id_calon');
    $voted = $this->input->post('voted');
    

    $data = array(
                'id_calon' => $id_calon,
                'voted' => +1
    );

    $where = array(
        'id_calon' => $id_calon,
    );
    
    $this->Admin_dcalon->vote_calon($where,$data,'calon');
    redirect('voter/voter_sukses');
    
}

    
    public function logout() {
        $data = ['id_admin', 'username'];
        $this->session->unset_userdata($data);
 
        redirect ('Admin_login');
    }
}
?>

Model

PHP Code:

<?php

class Admin_dcalon extends CI_Model{
    
    function tampil_data(){
        $this->db->select('*');
        $this->db->from('calon');
        return $this->db->get();
    }
    
    function tambah_data($data,$table){
        $this->db->insert($table,$data);
    }
    
    function hapus_data($where,$table){
    $this->db->where($where);
    $this->db->delete($table);
    }
    
    function edit_data($where,$table){        
    return $this->db->get_where($table,$where);
    }
    
    function update_data($where,$data,$table){
        $this->db->where($where);
        $this->db->update($table,$data);
    }
    
     function vote_calon($where,$data,$table)
    {
       $this->db->where($where);
        $this->db->update($table,$data);    
    }
    
    

}

?>

and here is my view, from user page.

PHP Code:

<!doctype html>
<html>


<head>
        <title>Vote Kepala Desa</title>
        <link href="<?php echo base_url('asset/bootstrap/css/style.css');?>" rel="stylesheet"> 
        <link href="<?php echo base_url('asset/bootstrap/css/bootstrap.min.css');?>" rel="stylesheet">
         <link href="<?php echo base_url('asset/bootstrap/css/sb-admin.css');?>" rel="stylesheet">
         <link href="../../../asset/bootstrap/css/bootstrap.css" rel="stylesheet" type="text/css">
         
    
    </head>


<body style="font-family:'Segoe UI Light'">

        <!-- Navigation -->
        <nav class="navbar navbar-inverse navbar-fixed-top" role="navigation">
            <!-- Brand and toggle get grouped for better mobile display -->
            <div class="navbar-header">
            </div>
            <!-- Top Menu Items -->
            <ul class="nav navbar-left top-nav">
                
                <li class="active">
                        <a href="<?= site_url('voter/voter_home') ?>"><i class="fa fa-fw fa-dashboard"></i>Home</a>
                    </li>
                    <li>
                        <a href="<?= site_url('voter/voter_vote') ?>" ><i class="fa fa-fw fa-bar-chart-o"></i>Vote</a>
                    </li>
                    <li>
                        <a href="<?= site_url('voter/voter_hasil') ?>" ><i class="fa fa-fw fa-bar-chart-o"></i>Hasil Voting</a>
                    </li>
            </ul>
            
            <ul class="nav navbar-right top-nav">
                
                
                        <li>
                    <a style="float:right" href="<?= site_url('voter/voter_home/logout') ?>">Logout</a>
                    
                        </li>
            </ul>
      
        </nav>
        
        
        
        
           
        
     
         <center>
                    <div class="col-lg-10" style="float:inherit">
                    
                      <div class="panel panel-default panel-profile m-b-0">
                        <div class="panel-heading" ></div>
                                
                                <div class="panel-body text-center" >
                                      <img src="<?php echo base_url('asset/img/certificate.png');?>" height="200" width="200">
                        

                        <h1><strong>Vote Calon Kepala Desa</strong></h1>
                        <p><strong>Sistem E-voting Desa Pakraman Cucukan</strong></p>
                        <img src="<?php echo base_url('asset/img/bookmark.png');?>" height="50" width="50">
                            
                            <br> 
                            <br>
                            <center>
                            <h5 class="alert alert-danger">
                            <strong>PERHATIAN ! VOTE HANYA DAPAT DILAKUKAN 1X ( SATU KALI )</strong></h5>
                            </center>        
                                              
                                 
                               <form class="" action="<?= site_url('admin_calon/vote_calon') ?>" method="post"> 
         <center><table style="float:inherit" class="table table-bordered table-hover table-striped" >
        <?php 
        $no = 1;
        foreach($calon as $calon){ 
        ?>
       
        <div class="col-lg-4" action=""  method="post">
        
             <div class="panel panel-default panel-profile m-b-0">
             <div class="panel-heading" ></div>
                        <br>
                        <img class="img-circle" style="width:200px;height:200px" src="<?php echo  base_url('upload/'.$calon->img) ?>">
                        <h4><strong>Calon <?php echo $calon->id_calon ?></strong></h4>
                        <h5><?php echo $calon->nama ?></h5>
                        <br>
                        
                        <button class="btn btn-md btn-success" type="submit" >Vote</button>
                         </img>    
                          <br>
                          <br>
             </div> 
        </div>
        <?php } ?>
        
        </table></center>
        </form>
                                      
                                 
                                
                                
                        </div>
                      </div>
                  
                  </div>
       </center>
                
         
 
</body>

</html> 


Thanks for any help.

Gus bala