我真的需要你的帮助我已经工作了几个星期，我有一个动态字段是一个名为＆＃39; size＆＃39;并且有一个名为“＆＃39; category＆＃39;”的字段，每个类别都有一个或多个大小。现在我需要将数据保存到两个表中。类别和大小彼此相关，在这里：
（我的数据库表）
CREATE TABLE `category` (
`category_id` int(11) NOT NULL AUTO_INCREMENT,
`category_name` varchar(55) NOT NULL,
PRIMARY KEY (`category_id`)
)
CREATE TABLE `sizes` (
`size_id` int(11) NOT NULL AUTO_INCREMENT,
`size` varchar(45) NOT NULL,
`category_id` int(11) NOT NULL,
PRIMARY KEY (`size_id`),
KEY `cat_fk_idx` (`category_id`),
CONSTRAINT `cat_fk` FOREIGN KEY (`category_id`) REFERENCES `category` (`category_id`) ON DELETE NO ACTION ON UPDATE NO ACTION
)
这是我的观点（category.php）
<div class="col-sm-5">
<?php echo $this->session->flashdata('errorMessage');?>
<?php echo $this->session->flashdata('successMessage');?>
<?php echo form_open('category_con/add_category'); ?>
<?php echo form_fieldset('<h1 class="text-danger">Categories</h1>'); ?>
<div class="form-group">
<label for='Username'>Add New Category</label>
<input type="text" name="category_name" class="form-control" placeholder="Add new Category here">
</div>
<script src="assets/js/jquery.min.js"></script>
<div class="form-group">
<form name="add_name" id="add_name">
<div class="table-responsive">
<table class="table table-bordered" id="dynamic_field">
<tr>
<td><input type="text" name="size[]" placeholder="Add Size" class="form-control name_list" /></td>
<td><button type="button" name="add" id="add" class="btn btn-success">Add More</button></td>
</tr>
</table>
</div>
</form>
</div>
<div class="form-group">
<input type="submit" name="save_category" class="btn btn-success" value="Save Category">
</div>
</div>
<script>
$(document).ready(function(){
var i=1;
$('#add').click(function(){
i++;
$('#dynamic_field').append('<tr id="row'+i+'"><td><input type="text" name="size[]" placeholder="Add Size" class="form-control name_list" /></td><td><button type="button" name="remove" id="'+i+'" class="btn btn-danger btn_remove">X</button></td></tr>');
});
$(document).on('click', '.btn_remove', function(){
var button_id = $(this).attr("id");
$('#row'+button_id+'').remove();
});
});
</script>
<?php echo form_close(); ?>
我的控制器（category_con.php）
public function add_category( ) {
$this->form_validation->set_rules('category_name', 'Category', 'required|alpha');
if ($this->form_validation->run() == FALSE) {
$this->session->set_flashdata('errorMessage', '<div class="alert alert-danger"> '.validation_errors() . '</div>');
redirect(base_url('categories'));
}else {
$this->load->model('categories_model');
$exec = $this->categories_model->categorysize();
if ($exec) {
$this->session->set_flashdata('successMessage', '<div class="alert alert-success"> Category Added Successfully</div>');
redirect(base_url('categories'));
}else {
$this->session->set_flashdata('errorMessage', '<div class="alert alert-danger">Opps... Something Went Wrong Please Try Again.</div>' );
redirect(base_url('categories'));
}
}
}
我的模型（categories_model.php）
public function categorysize()
{
$this->load->database();
$category_name = $this->input->post('category_name');
$this->db->query("INSERT INTO category (category_name) VALUES (".$this->db->escape($category_name).")");
$last_row_id = $this->db->insert_id(); // Gets last row id ( category_id )
for($i = 0; $i < count ($_POST['size']); $i++){
$form_data[] = array(
'size' => $_POST['size'][$i] ,
'category_id' => "$last_row_id"
);
$this->db->insert_batch('sizes', $form_data);
}
}
单击保存按钮后，它会将类别保存在类别表中，大小将保存在sizes表和category_id上，但第一个输入将重复。并且它显示错误消息＆＃34; Opps ...有些错误请再试一次＆＃34;我把它放在我的控制器上，但是如果我删除了错误消息，即使我重定向页面，我也有一个blnk页面。
我希望你能帮助我。谢谢！！
答案 0 :(得分：0)
我相信以下内容会有所帮助。一，模型。它需要返回Controller可以使用的东西。
class Categories_model extends CI_Model
{
public function __construct()
{
parent::__construct();
$this->load->database(); //Or do this in autoload.php
}
public function categorysize()
{
$category_name = $this->input->post('category_name');
// using insert() like this will automatically escape $category_name
$this->db->insert("category", ['category_name' => $category_name]);
$last_row_id = $this->db->insert_id(); // Gets last row id ( category_id )
$form_data = []; //empty array, just in case
$sizes = $this->input->post('size'); //safer than using $_POST directly
foreach($sizes as $size)
{
$form_data[] = array('size' => $size, 'category_id' => "$last_row_id");
}
// insert_batch() returns number of rows inserted or FALSE on failure
// so the next line will return TRUE as long as insert_batch() doesn't return FALSE
return FALSE !== $this->db->insert_batch('sizes', $form_data);
}
}
在控制器中，您现在可以从模型返回以使用if语句进行测试
public function add_category()
{
$this->form_validation->set_rules('category_name', 'Category', 'required|alpha');
if($this->form_validation->run() === FALSE) //use the explicit comparison operator ===
{
$this->session->set_flashdata('errorMessage', '<div class="alert alert-danger"> '.validation_errors().'</div>');
redirect(base_url('categories'));
}
// You don't need an else block because the if block ends the script when it runs
// Script is ended by redirect() which does not return to this code
$this->load->model('categories_model');
if($this->categories_model->categorysize())
{
$this->session->set_flashdata('successMessage',
'<div class="alert alert-success"> Category Added Successfully</div>');
}
else
{
$this->session->set_flashdata('errorMessage',
'<div class="alert alert-danger">Opps... Something Went Wrong Please Try Again.</div>');
}
redirect(base_url('categories'));
}
以下内容不会影响输出，但会减少您必须执行的输入操作。任何时候你连续有几个php命令，你不需要用<?php ?>标签包围它们。然后，在您的视图中围绕所有行，就像这样
<?php
echo $this->session->flashdata('errorMessage');
echo $this->session->flashdata('successMessage');
echo form_open('category_con/add_category');
echo form_fieldset('<h1 class="text-danger">Categories</h1>');
?>