在 CodeIgniter 中插入重复数据
我只是在pastebin http://pastebin.com/KBtqrAkZ 的 codeigniter 控制器部分插入数据
public function add_product()
{
$this->lang->load('log_in', 'english');
log_in_check($this->lang->line('log_in_authentication_error'), 'admin/log_in');
$this->lang->load('common', 'english');
$data['title'] = $this->lang->line('admin_index_title');
$this->load->view('admin_template/header', $data);
$this->load->view('admin_template/left_menu');
$data['error_msg'] = '';
if ($this->form_validation->run('add_product') === TRUE)
{
$this->admin_model->add_product($this->input->post());
$this->session->set_flashdata('status_msg', $this->lang->line('add_product_success'));
redirect(uri_string(), 'refresh');
exit ;
$data['error_msg'] = $this->lang->line('add_product_invalid_data');
}
$this->load->view('admin/add_product');
//$this->load->view('admin_template/notification');
$this->load->view('admin_template/footer');
}
比我的模型部分是简单添加在pastebin http://pastebin.com/WiLHV2sr
public function add_product($data = array())
{
$this->db->insert('ishop_product', $data);
return $this->db->insert_id();
}
我的问题是重定向后,如果我按 ctrl + F5 或 F5 而不是插入数据。我是 codeigniter 的新手。请帮助我。任何帮助将不胜感激。
I am just inserting data in codeigniter controller part at pastebin http://pastebin.com/KBtqrAkZ
public function add_product()
{
$this->lang->load('log_in', 'english');
log_in_check($this->lang->line('log_in_authentication_error'), 'admin/log_in');
$this->lang->load('common', 'english');
$data['title'] = $this->lang->line('admin_index_title');
$this->load->view('admin_template/header', $data);
$this->load->view('admin_template/left_menu');
$data['error_msg'] = '';
if ($this->form_validation->run('add_product') === TRUE)
{
$this->admin_model->add_product($this->input->post());
$this->session->set_flashdata('status_msg', $this->lang->line('add_product_success'));
redirect(uri_string(), 'refresh');
exit ;
$data['error_msg'] = $this->lang->line('add_product_invalid_data');
}
$this->load->view('admin/add_product');
//$this->load->view('admin_template/notification');
$this->load->view('admin_template/footer');
}
Than my model part is simple add at pastebin http://pastebin.com/WiLHV2sr
public function add_product($data = array())
{
$this->db->insert('ishop_product', $data);
return $this->db->insert_id();
}
my problem is after redirecting if I press ctrl + F5 or F5 than the data is inserting. I am a new in codeigniter. Help me please. Any help will be greatly appreciated.
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这就是双重提交问题。
有几种处理方法:
帖子/重定向/获取模式:破坏后退按钮,并且它不会阻止您的用户返回足够远以再次提交。不处理多次点击。
禁用提交按钮:有时会处理多次点击,但不会修复用户返回并再次提交的问题。
在会话中存储令牌:如果如果您在浏览器中打开了多个选项卡,则存储在会话中的令牌可能会混淆。 (注意:可以创建特定于浏览器选项卡的cookies使用javascript,但我自己没有尝试过。)
更改数据库不允许重复:最好的解决方案,但也是最努力的。如果它检测到一组重复数据,则忽略第二个请求。
唯一交易 ID:在此 PHP 黑客页面,以及 此答案。
会话中存在多个令牌:选项 3 的变体。如果将所有生成的令牌存储在会话中,则不需要涉及数据库。鉴于令牌在会话内是唯一的,重复的概率要低得多。可能的问题包括代币数量增长失控。也许可以通过有限大小的堆栈来修复,在该堆栈中,您将添加到堆栈的顶部,而额外的令牌会从底部掉下来。未经测试。
--
我喜欢唯一交易ID方法。它的工作原理如下:
生成随机
transaction_id
并将其放入您的 Web 表单中。当用户点击submit
时,它就会发生。当您收到添加产品的请求时,请在交易表中检查
transaction_id
。如果表中不存在该id,则执行事务,并将transaction_id插入表中。
如果表中确实存在该id,则事务已完成。
您还应该搜索 [double-submit-prevention] 看看是否可以找到更好的解决方案。
This is the Double Submit Problem.
There are several ways of dealing with it:
The Post / Redirect / Get pattern: Breaks the back button, and it does not keep your user from going back far enough to submit again. Does not handle multiple clicks.
Disable the submit button: Handles multiple clicks some of the time, but does not fix the user going back and submitting again.
Store a token in the session: If you have multiple tabs open in the browser, the token stored in the session may get mixed up. (Note: It may be possible to create browser tab specific cookies using javascript, but I have not tried it myself.)
Change the database to not allow duplicates: The best solution, but also the most effort. If it detects a set of duplicate data, ignore the second request.
Unique transaction id: Described on this PHP hacks page, and on this answer.
Multiple tokens in the session: A variation on option 3. If you store all generated tokens in the session, you don't need to involve the database. The probability of a duplicate is much lower, given that tokens are unique inside a session. Possible problems include the set of tokens growing out of control. Maybe fixable with a limited size stack where you add to the top of the stack, and extra tokens fall off the bottom. Untested.
--
I like the unique transaction id method. It works like this:
Generate a random
transaction_id
and put it in your web form. It goes along when the user clickssubmit
.When you receive the request to add a product, check for the
transaction_id
in the transaction table.If the id does not exist in the table, do the transaction, and insert the transaction_id into the table.
If the id does exist in the table, the transaction is already done.
You should also search for [double-submit-prevention] in to see if you can find an even better solution.
有一个简单的解决方案,您可以在添加产品后重定向到其他页面,例如:
这样做将删除发布数据,并且数据不会重新添加到数据库中。
Theres a simple solution, you can redirect to some other page after adding product, like:
Doing this will remove the post data and data would not be re-added to database.