Question

我是PHP和CodeIgniter的新手。我一直在尝试在stud表中添加新数据，或者编辑一些数据但没有成功。问题是我可以删除数据就好了。所以我真的不知道这是什么问题。

Stud_controller

<?php
class Stud_controller extends CI_Controller {
    function __construct(){
        parent::__construct();

        $this->load->helper('url');
        $this->load->database();
    }

    public function index(){
        $query = $this->db->get('stud');
        $data['records'] = $query->result();
        $this->load->helper('url');
        $this->load->view('Stud_view', $data);
    }

    public function add_student_view(){
        $this->load->helper('form');
        $this->load->view('Stud_add');
    }

    public function add_student(){
        $this->load->model('Stud_Model');
        $data = array(
            'roll_no' => $this->input->post('roll_no'),
            'name' => $this->input->post('name')
        );
        $this->Stud_Model->insert($data);
        $query = $this->db->get('stud');
        $data['records'] = $query->result();
        $this->load->view('Stud_view', $data);
    }

    public function update_student_view(){
        $this->load->helper('form');
        $roll_no = $this->uri->segment('3');
        $query = $this->db->get_where('stud', array('roll_no' => $roll_no));
        $data['records'] = $query->result();
        $data['old_roll_no'] = $roll_no;
        $this->load->view('Stud_edit', $data);
    }

    public function update_student(){
        $this->load->model('Stud_Model');
        $data = array(
                'roll_no' => $this->input->post('roll_no'),
                'name' => $this->input->post('name')
        );
        $old_roll_no = $this->input->post('old_roll_no');
        $this->Stud_Model->update($data, $old_roll_no);
        $query = $this->db->get('stud');
        $data['records'] = $query->result();
        $this->load->view('Stud_view', $data);
    }

    public function delete_student(){
        $this->load->model('Stud_Model');
        $roll_no = $this->uri->segment('3');
        $this->Stud_Model->delete($roll_no);
        $query = $this->db->get('stud');
        $data['records'] = $query->result();
        $this->load->view('Stud_view', $data);
    }
}
?>

Stud_Model

<?php
class Stud_Model extends CI_Model {
    function __construct(){
        parent::__construct();
    }

    public function insert($data){
        if ($this->db->insert('stud', $data)){
            return true;
        }
    }

    public function delete($roll_no){
        if ($this->db->delete('stud', 'roll_no =' . $roll_no )){
            return true;
        }
    }

    public function update($data, $old_roll_no){
        $this->db->set($data);
        $this->db->where('roll_no', $old_roll_no);
        $this->db->update('stud', $data);
    }
}
?>

Stud_add

<!DOCTYPE HTML>
<html lang="en">
<head>
    <meta charset="utf-8">
    <title>Students Example</title>
</head>
<body>
    <form method = "" action = "">
        <?php
        echo form_open('Stud_controller/add_student');
            echo form_label('Roll No.');
            echo form_input(array('id' => 'roll_no', 'name' => 'roll_no'));
            echo "<br />";
            echo form_label('Name');
            echo form_input(array('id' => 'name', 'name' => 'name'));
            echo "<br />";
            echo form_submit(array('id' => 'submit', 'value' => 'Submit'));
        echo form_close();
        echo "<br />";
        echo "<a href='".base_url()."index.php'>Home</a></td>";
        ?>
    </form>
</body>
</html>

Stud_edit

<!DOCTYPE html>
<html lang="eng">
<head>
    <meta charset="utf-8">
    <title>Students Example</title>
</head>
<body>
    <form action="" method="">
        <?php
        echo form_open('Stud_controller/update_student');
        echo form_hidden('old_roll_no', $old_roll_no);
        echo form_label('Roll No.');
        echo form_input(array('id'=>'roll_no', 'name'=>'roll_no', 'value'=>$records[0]->roll_no));
        echo "<br />";
        echo form_label('Name');
        echo form_input(array('id'=>'name', 'name'=>'name', 'value'=>$records[0]->name));
        echo "<br />";
        echo form_submit(array('id'=>'submit', 'value'=>'Submit'));
        echo form_close();
        echo "<a href='".base_url()."index.php'>Home</a></td>";
        ?>
</body>
</html>

Answer 1

尝试这样的事情（controller update_student）

$query = $this->Stud_Model->update($data, $old_roll_no);
if ($query->result() {
$data['records'] = $query->result();
}
$this->load->view('Stud_view', $data);

你不需要$ query = $ this-＆gt; db-＆gt; get（＆＃39; stud＆＃39;）;,因为你的模型应该返回。但你的模型不会返回任何东西您必须使用if语句启动该方法。在您的其他功能中尝试，并确保您没有在控制器和模型中更新。此外，在引用类中的控制器和模型时，请使用小写名称。以下是不使用模型的插入示例。确保并验证并转义您的数据

function enterPosts()
{
$this->is_logged_in();
$data = [
  'title'   => html_escape(trim($this->input->post('title'))),
  'content' => trim($this->input->post('content')),
  'date'    => html_escape(trim($this->input->post('date'))),
  'parent'  => html_escape(trim($this->input->post('parent'))),
  'status'  => html_escape(trim($this->input->post('status'))),
  'slug'    => trim($this->input->post('slug'))
];

$this->form_validation->set_rules('title', 'Title', required|max_length[50]',));
$this->form_validation->set_rules('content', 'content',  'required|min_length[50]'));
$this->form_validation->set_rules('date', 'Date', 'required');
$this->form_validation->set_rules('parent', 'Parent', 'required');
$this->form_validation->set_rules('status', 'Status', 'required');
$this->form_validation->set_rules('slug', 'Slug', required|trim|min_length[30]'));
if( $this->form_validation->run() == FALSE) {
        echo validation_errors(); //or just load your form view
    }else
    {
        $this->db->insert('posts', $data);

    }
 } //end of enterposts

Answer 2

正如你已经说过你是新手所以

看看这个页面，你肯定会得到一些关闭

Link

CodeIgniter Add＆amp;更新数据库没有成功，没有错误，没有，只是不会工作

2 个答案: