is_unique用于codeigniter表单验证 [英] is_unique for codeigniter form validation

问题描述

我想知道如何在下面情况下使用Codeigniter表单验证库中的 is_unique 规则。

I'm trying to figure out how I can use the is_unique rule from the Codeigniter form validation library in the following situation.

我试图提交编辑用户表单，并且具有以下规则：

I'm trying to submit a edit user form and have the rule:

$this->form_validation->set_rules('user_name', 'User Name', 'required|trim|xss_clean|is_unique[users.user_name]');

如果表单中的其他值正在更改，但此值保持不变，该怎么办？

What if other values in the form are being changed but this value stays the same. The form is going to see that this value already exists so how would I protect it from editing if this value isn't changed.

推荐答案

为了确保它只在用户提交新值时运行，可以检查发布值 $ this-> input-> post（'user_name'）与您从数据库中提取的值填充表单。如果它们相同，则不验证is_unique;

To make sure it runs only when the user submits a new value, you could check the posted value $this->input->post('user_name') against the value you pulled from the database to populate your form with. If they are the same, don't validate is_unique;

if($this->input->post('user_name') != $original_value) {
   $is_unique =  '|is_unique[users.user_name]'
} else {
   $is_unique =  ''
}

$this->form_validation->set_rules('user_name', 'User Name', 'required|trim|xss_clean'.$is_unique);

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