如何在codeigniter中获取验证错误

Question

你好，我正在数据库中插入数据。当我在插入时同时插入类别和描述，然后插入数据，但当我不插入类别和说明输入并单击"创建然后无错误"显示空白页面admin/category/register_category时，我想显示类别和描述字段不应为空。

category.php视图页面如下：

<?php if(isset($_SESSION['success'])){ ?>
<div class="alert alert-success"><?php echo $_SESSION['success']; ?> 
</div>
<?php } ?>
<?php echo validation_errors('<div class="alert alert-danger">','</div>'); ?>
<form class="form" action="<?php echo site_url('admin/category/register_category') ?>" method="POST">
<label for="contactinput5">Category Name</label>
<input class="form-control border-primary" type="text" placeholder="category" name="category" id="contactinput5">
<label for="contactinput5">Discription</label>
<textarea class="form-control border-primary" type="text" placeholder="discription" name="discription" id="contactemail5"></textarea>
<button type="submit" name="create" class="btn btn-primary">

我的控制器Category.php页面是：

<?php
class Category extends CI_Controller {
function index() {
$this->load->view('admin/category');
}
function register_category() {      
$this->form_validation->set_rules('category', 'Category', 'required');
$this->form_validation->set_rules('discription', 'Discription', 'required');
if($this->form_validation->run() == TRUE){
echo "form validate";
$this->load->model('categories');
$insert_category = $this->categories->validate();
if($insert_category){
$this->session->set_flashdata("success","Your data has been added");
redirect("admin/category","refresh");
}
else{
redirect('admin/category');
}
}
}
}
?>  

型号类别页面：

<?php
class Categories extends CI_Model
{
function validate()
{
$arr['categoryname'] =  $this->input->post('category');
$arr['discription'] =   $this->input->post('discription');
return $this->db->insert('category',$arr);      
}
}
?>

Answer 1

如果验证结果不为true，则可以从$this->form_validation->error_array()中获取错误，循环返回数组并将错误显示给用户。

希望得到帮助。

Answer 2

嘿，伙计们，谢谢，我把这个代码放在上就得到了答案

if($this->form_validation->run() == FALSE)
{
$this->index();
}

Answer 3

你好，请更新控制器中的函数。验证条件中存在问题将TURE更改为FALSE。检查以下代码。

function register_category()
{       
$this->form_validation->set_rules('category', 'Category', 'required');
$this->form_validation->set_rules('discription', 'Discription', 'required');
if ($this->form_validation->run() == FALSE)
{
$this->load->view('category');
}
else
{
$this->load->model('categories');
$insert_category = $this->categories->validate();
if($insert_category)
{
$this->session->set_flashdata("success","Your data has been added");
redirect("admin/category","refresh");
}
else
{
redirect('admin/category');
}
}
}

Answer 4

Get all post validation errors in controller :
echo validation_errors();
If you want to show at the end of textbox use this following method :
<label for="contactinput5">Category Name</label>
<input class="form-control border-primary" type="text" placeholder="category" name="category" id="contactinput5">
<?php echo form_error('category', '<div class="error">', '</div>'); ?>

Answer 5

FYI您的解决方案之所以有效，是因为validation_errors()仅适用于当前实例。当你重定向时，信息就会丢失。您必须将其存储在会话变量中，否则这很常见(将表单操作更改为self或留空(：

function index() {
if ($_POST) {
$this->form_validation->set_rules('category', 'Category', 'required');
$this->form_validation->set_rules('discription', 'Discription', 'required');
if($this->form_validation->run() == TRUE){
$this->load->model('categories');
$insert_category = $this->categories->validate();
if($insert_category){
$this->session->set_flashdata("success","Your data has been added");
}
}
}
$this->load->view('admin/category');
}

当然，如果你对url的更改感到满意，你的方法也会起作用。