ajax复选框没有将我的数据传递给codeigniter中的控制器

I'm trying to update my database data using checked box with ajax. the checkbox is running when I clicked it alert the success msg. but not passing the data to my controller. I don't know where to find my mistake here. I'm trying to figure out how to check if the data is pass to my controller.

Anyone can help me?

view

$checked = FALSE;
if($result->consignment == 1) { $checked = TRUE; }
    $data = array(
        'value'   => $result->id, 
        'onClick' => 'incoming_CheckboxState();',
        'class'   => 'incoming',
        'checked' => $checked
    );
echo form_checkbox($data);?> Incoming

ajax

function incoming_CheckboxState() {
  if ($('.incoming').is(':checked')) {

    var id = $('.incoming').val();
    var yes = 1;                
    $.ajax({
        type: "POST",
        url: "<?=based_url(); ?>user_accounts/update_permission",
        data: { user_id : id, status : yes },
        success: function(msg) {
            alert("Activated");
        }
    });
  } 
}

controller

public function update_permission(){
    $data = array(
       'id' => $this->input->post('user_id'),
        'status' => $this->input->post('status')
    );
    $this->user_accounts_model->incoming($data);
}

model

public function incoming($data){
    $this->db->set('consignment', $data['status'])
             ->where('id', $data['id'])
             ->update('users');
}