【发布时间】:2015-03-04 19:55:22
【问题描述】:
我希望你一切都好。有人可以帮我解决我的问题吗?我有 2 张桌子。另一个是针对客户的,它具有customer_id 的自动增量值。另一个表用于订单,它的orders_id 和另一个表(customers)的外键也有一个自动增量。
当我插入新客户时,如果成功,我希望页面重定向到添加新订单页面。在插入新订单时,我的orders 表中的customer_id 字段应该与新添加的客户具有相同的值。添加客户和添加新订单在我的控制器中具有不同的功能。我在插入新订单时遇到错误 1452,这意味着为 orders 表中的外键 customers_id 插入的值与另一个表(客户)中的值不同。
现在,我已经使用 session.我的问题是获取最后一个 id 的另一个会话覆盖了登录会话。
这是来自我的控制器的一些代码 sn-ps:
Class MyController extends CI_Controller
{
function __construct()
{
parent::__construct();
$this->c_id = 0;
if($this->session->userdata('logged_in'))
{
$session_data = $this->session->userdata('logged_in');
$data['username'] = $session_data['username'];
if($session_data['username'] == 'administrator'){
$this->load->database('sample');
$this->load->model('samplemodel_model');
$this->load->library('form_validation');
} else {
redirect('home', 'refresh');
}
} else {
redirect('login', 'refresh');
}
}
public function index() {
if($this->session->userdata('logged_in'))
{
$session_data = $this->session->userdata('logged_in');
$data['username'] = $session_data['username'];
//code for validation here
$customers = $this->samplemodel_model->get_entries('customers');
if($this->form_validation->run() == FALSE) {
//Field validation failed.
} else {
//Insert $data
//$data = array('xxxxxx');
//data is something like that
$this->create($data);
}
}
else
{
//If there's no session it will redirect to login page
}
}
//add new orders
public function addOrders() {
if($this->session->userdata('last_inserted_id')) //if I use this session, I can get the last inserted ID but the session data for the login will not be retrieved.
{
$session_data = $this->session->userdata('last_inserted_id');
$orders = $this->samplemodel_model->get_entries('orders');
if($this->form_validation->run() == FALSE) {
//Field validation failed.
} else {
//Insert data
$data = array('customer_id' => $session_data['customer_id'],
'order_type' => $this->input->post('order_type'));
$this->createItem($data);
}
}
else
{
//If no session, redirect to login page
redirect('login', 'refresh');
}
}
//create customer
public function create($data) {
//Insert data
$customers = $this->samplemodel_model->get_entries('customers');
//$data = array(xxxxx);
//somethin' like that for data array
$this->load->samplemodel_model->create('customers', $data);
//***********************************************************//
// get and save last id inserted //
//***********************************************************//
//query the database
$result = $this->samplemodel_model->get_last_inserted($this->db->insert_id());
if($result)
{
$sess_array = array();
foreach($result as $row)
{
$sess_array = array('customer_id' => $row->customer_id);
$this->session->set_userdata('last_inserted_id', $sess_array);
}
return TRUE;
}
else
{
echo "<script type='text/javascript'>alert('error');</script>";
return false;
}
session_start('last_inserted_id');
//********************************************************//
// end //
//********************************************************//
redirect('myController/addOrders', 'refresh');
}
public function createItem($data) {
//Insert data
$orders = $this->samplemodel_model->get_entries('orders');
$data = array('customer_id' => $session_data['customer_id'],
'order_type' => $this->input->post('order_type'));
$this->load->samplemodel_model->create('orders', $data);
//I'm not so sure if it is in this function that I should place the unset for the session 'last_inserted_id'
redirect('home', 'refresh');
}
}
在我的模型中,我插入了另一个函数来帮助我保存最后插入的 id。就是这样:
public function get_last_inserted($id)
{
$this -> db -> select('customer_id');
$this -> db -> from('customers');
$this -> db -> where('customer_id', $id);
$this -> db -> limit(1);
$query = $this -> db -> get();
if($query -> num_rows() == 1)
{
return $query->result();
}
else
{
return false;
}
}
请!帮助:'(如果您有任何其他想法,我将不胜感激。非常感谢您!
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标签: php mysql database codeigniter