您好，我正在我的车间工具项目中工作。
现在，当我按下添加到购物车按钮（我的名字叫pinjam）时，我会有时执行一些奇怪的操作，它只是返回到登录页面，因为会话被破坏了。有人发生过这种奇怪的事情吗？还是可以帮我吗？
情况就是这样。
我按下了我可以借用的许多工具之一上的“添加到购物车”按钮，然后将其发布到控制器上的add_to_cart函数中，并使用jquery / ajax重新加载了该页面上的#cart_content div新数据
function index(){
$data['guru'] = $this->model_akun->getnamaguru();
$data['data']=$this->model_alat->getAll();
$this->load->view('siswa/dashboard',$data);
}
function add_to_cart(){
if($this->model_alat->validate_add_cart_item() == TRUE){
// Check if user has javascript enabled
if($this->input->post('ajax') != '1'){
redirect('siswa'); // If javascript is not enabled, reload the page with new data
}else{
echo 'true'; // If javascript is enabled, return true, so the cart gets updated
}
}
}function show_cart(){
$this->load->view('siswa/cart');
}
function validate_add_cart_item(){
$id = $this->input->post('id_alat'); // Assign posted id_alat to $id
$cty = $this->input->post('quantity'); // Assign posted quantity to $cty
//$this->db->where('id_alat', $id); // Select where id matches the posted id
$query = $this->db->query('select * from alat where id_alat="'.$id.'"')->result(); // Select the products where a match is found and limit the query by 1
//$ss = $this->input->post('ajax');
//echo $query['id_alat'];
//echo "<script>alert(".$cty.");
// </script>";
// Check if a row has been found
if($query > 0){
foreach ($query as $row){
$data = array(
'id' => $id,
'qty' => $cty,
'price' => '0',
'name' => $row->nama_alat
);
$this->cart->insert($data);
return TRUE;
}
// Nothing found! Return FALSE!
}else{
echo "<script>alert('FALSE no rows :(');</script>";
return FALSE;
}
}
<script>
$(document).ready(function() {
/*place jQuery actions here*/
var link = "/weteies/index.php/"; // Url to your application (including index.php/)
$("div.subalat form").submit(function() {
// Get the product ID and the quantity
var id = $(this).find('input[name=id_alat]').val();
var qty = $(this).find('input[name=quantity]').val();
$.post(link + "siswa/add_to_cart", { id_alat: id, quantity: qty, ajax: '1' },
function(data){
// Interact with returned data
if(data == 'true'){
$.get(link + "siswa/show_cart", function(cart){ // Get the contents of the url cart/show_cart
$("#cart_content").html(cart); // Replace the information in the div #cart_content with the retrieved data
});
}else{
alert("Product does not exist");
}
});
});
});
##siswa/cart view
<div class="table-responsive">
<?php echo form_open('siswa/update_cart'); ?>
<table class="table table-bordered">
<thead >
<tr>
<th>Alat</th>
<th>Jumlah</th>
<!--<th>Total</th>-->
<th>Actions</th>
</tr>
</thead>
<tbody>
<?php $a=0; $b=0;foreach($this->cart->contents() as $items): ?>
<tr>
<!--<input type="hidden" id="id_peminjam" name="id_peminjam" value="'.$this->session->userdata('ses_id').'"/>-->
<td><?php echo form_hidden('rowid['.$a.']', $items['rowid']);
echo $items['name']; ?></td>
<td><?php echo form_input(array('name' => 'qty['.$a.']', 'value' => $items['qty'], 'maxlength' => '2'), '', 'class="form-control form-control-sm"'); ?></td>
<!--<td><button type="button" id="'.$items['rowid'].'" class="romove_cart btn btn-danger btn-sm">Cancel</button></td>-->
<td><?php echo form_submit('', 'Update', 'class="btn btn-accept btn-sm"');
$b=$a+1;?>
</tr>
<?php $a++; endforeach; ?>
</tbody>
</table>
<?php echo form_hidden('jumlah_alat', $b);
echo form_close();?>
<?php echo form_open('siswa/sub_cart'); ?>
<table class="table">
<tr>
<td >
<select name="id_guru" class="form-control form-control-sm">
<option>Pilih Guru</option>
<?php foreach($guru as $gurus): echo '<option value='.$gurus->id_akun.'>'. $gurus->nama .'</option>'; endforeach;?>
</select>
</td>
<td>
<?php $hitung=0; $b=0; foreach($this->cart->contents() as $items): ?>
<?php echo form_hidden('id_alat'.$hitung.'', $items['id']);
echo form_hidden('jumlah_pinjam'.$hitung.'', $items['qty']);
echo form_hidden('id_siswa', $this->session->userdata('ses_id'));
$b=$hitung+1;
$hitung++;
endforeach;
echo form_hidden('jumlah_alat', $b);
echo anchor('siswa/empty_cart', 'Hapus Semua', 'class="btn btn-danger btn-sm col-sm-5"'); ?>
<?php echo form_submit('', 'Pinjam!', 'class="btn btn-primary btn-sm col-sm-5"');?>
</td>
</tr>
</table>
<?php echo form_close(); ?>
</div>
<!DOCTYPE html>
<head>
<?php $this->load->view("admin/_partials/head.php") ?>
</head>
<body id="page-top">
<!-- Navbar-->
<?php $this->load->view("siswa/_partials/navbar.php") ?>
<div id="wrapper">
<!-- Sidebar-->
<?php $this->load->view("siswa/_partials/sidebar.php") ?>
<div id="content-wrapper">
<div class="container-fluid">
<div class="row ">
<div class="col-md-6">
<div class="card mb-3">
<h4 class="card-header">Alat Tersedia</h4>
<br>
<div class="row card-body">
<?php foreach ($data as $row) : ?>
<div class="col-md-6">
<div class="card mb-3">
<div class="card-header text-center"><?php echo $row->nama_alat;?>
</div>
<div class="card-body">
<div class="row">
<div class="col-md-7">
Tersedia
</div>
<div class="col-md-5">
<input value="<?php echo $row->jumlah;?>" class="form-control form-control-sm" readonly>
</div>
</div>
<div class="subalat">
<?php echo form_open(''); ?>
<div class="row">
<div class="col-md-7">
Mau Brp?
</div>
<div class="col-md-5">
<?php echo form_hidden('id_alat', $row->id_alat);
echo form_input('quantity', '1', 'maxlength="2" class="form-control form-control-sm"'); ?>
</div>
</div>
<br>
<?php echo form_submit('add', 'Pinjam','class="btn btn-success btn-block col-md"'); ?>
<?php echo form_close(); ?>
</div>
</div>
</div>
</div>
<?php endforeach;?>
</div>
</div>
</div>
<div class="col-md-6">
<div class="card mb-3">
<h4 class="card-header">List Pinjam</h4>
<!--<div class="card-body">-->
<div id="cart_content">
<?php $this->load->view('siswa/cart'); ?>
</div>
<!--</div>-->
<div class="card-footer small text-muted">
Jika jumlah alat nya 0(nol), alat akan dihapus. Page rendered in <strong>{elapsed_time}</strong> seconds.
</div>
</div>
</div>
</div><!-- /.row -->
</div><!-- /.content-fluid -->
<!-- Sticky Footer -->
<?php $this->load->view("siswa/_partials/footer.php") ?>
</div>
<!-- /.content-wrapper -->
</div>
<!-- /#wrapper -->
<?php $this->load->view("siswa/_partials/scrolltop.php") ?>
<!-- Modal-->
<?php $this->load->view("siswa/_partials/modal.php") ?>
<!-- Js-->
<?php $this->load->view("siswa/_partials/js.php") ?>
</body>
<script>
$(document).ready(function() {
/*place jQuery actions here*/
var link = "/weteies/index.php/"; // Url to your application (including index.php/)
$("div.subalat form").submit(function() {
// Get the product ID and the quantity
var id = $(this).find('input[name=id_alat]').val();
var qty = $(this).find('input[name=quantity]').val();
$.post(link + "siswa/add_to_cart", { id_alat: id, quantity: qty, ajax: '1' },
function(data){
// Interact with returned data
if(data == 'true'){
$.get(link + "siswa/show_cart", function(cart){ // Get the contents of the url cart/show_cart
$("#cart_content").html(cart); // Replace the information in the div #cart_content with the retrieved data
});
}else{
alert("Product does not exist");
}
});
});
});
</script>
</html>
class Login extends CI_Controller{
function __construct(){
parent::__construct();
$this->load->model("model_login");
}
function index(){
$this->form_validation->set_rules('email', 'Email', 'required|trim|valid_email');
$this->form_validation->set_rules('password', 'Password', 'required|trim');
if($this->form_validation->run()==FALSE){
$session = $this->session->userdata('isLoggedin');
if($session == FALSE){
$this->load->view('login');
}
else{
redirect('');
}
}
else{
$email=$this->input->post('email');
$password=$this->input->post('password');
$cek_akun=$this->model_login->auth_akun($email,$password);
if($cek_akun->num_rows() > 0){
$user_data=$cek_akun->row_array();
$this->session->set_userdata('isLoggedin',TRUE);
$this->session->set_userdata('ses_id',$user_data['id_akun']);
$this->session->set_userdata('ses_nama',$user_data['nama']);
if($user_data['level']=='admin'){ //level admin
$this->session->set_userdata('level','admin');
redirect('admin');
}
else if($user_data['level']=='aspiran'){ //level aspiran
$this->session->set_userdata('level','aspiran');
redirect('aspiran');
}
else if($user_data['level']=='guru'){ //level guru
$this->session->set_userdata('level','guru');
redirect('guru');
}
else if($user_data['level']=='siswa'){ //level siswa
$this->session->set_userdata('level','siswa');
redirect('siswa');
}
}
else{
$this->load->view('login');
echo "<script>alert('Failed Login: Check your username and password!');
</script>";
}
}
}
function logout(){
$this->session->sess_destroy();
$url=base_url('');
redirect($url);}}