CodeIgniter：我在提交注册表时出现此数据库错误 1048。

Posted 2023-02-18

【中文标题】CodeIgniter：我在提交注册表时出现此数据库错误 1048。

【英文标题】：CodeIgniter: I am occurring this database error 1048 on submitting registration form.

【发布时间】：2017-03-08 00:48:44

【问题描述】：

我在提交注册表时在本地主机上发出此数据库错误，同时将用户值插入数据库。

发生数据库错误 错误号：1048 列“first_name”不能为空 插入用户（名字，姓氏，用户名，电子邮件，密码）值（NULL，NULL，NULL，''，'d41d8cd98f00b204e9800998ecf8427e'）

这是我的代码（应用程序/模型/模型用户）

<?php

class Model_users extends CI_Model

    public function can_log_in()

        $this->db->where('email', $this->input->post('email'));
        $this->db->where('password', md5($this->input->post('password')));
        $query = $this->db->get('users');

        if($query->num_rows() == 1)
            return TRUE;
        
        else 
            return FALSE;
          
    

    public function add_user()

        $first_name = $this->input->post('first_name');
        $last_name = $this->input->post('last_name');
        $username = $this->input->post('username');
        $email = $this->input->post('email');
        $password = md5($this->input->post('password'));

        $sql = "INSERT INTO users(first_name, last_name, username, email, password) 
        VALUES( " .$this->db->escape($first_name). ",
                " .$this->db->escape($last_name). ",
                " .$this->db->escape($username). ",
                '".$email."',
                '".$password."')";

        $query = $this->db->query($sql);
        if($query)
            return TRUE;
        
        else
            return FALSE;
        
    


?>

我也尝试过这个插入查询，但同样的数据库错误

 $new_members = array(    
            'first_name' => $this->input->post('first_name'),
            'last_name' => $this->input->post('last_name'),
            'username' => $this->input->post('username'),
            'email' => $this->input->post('email'),
            'password' => md5($this->input->post('password'))
        );

        $insert = $this->db->insert('users', $new_members);
        if($insert)
            return TRUE;
         else 
            return FALSE;

这是控制器文件（应用程序/控制器/主）。此文件中没有此类错误，表单验证也可以正常工作。

<?php

class Main extends CI_Controller

    public function index() 
        $this->login();
    

    public function login()
        $this->load->view('login');   
    

    public function signup()
        $this->load->view('signup');   
    



    public function members()
    if($this->session->userdata('is_logged_in'))
        $this->load->view('members');
    
    else 
        redirect('main/restricted');
      
    

    public function restricted()
        $this->load->view('restricted');
    

    public function login_validation()
        $this->load->helper('security');
        $this->load->library('form_validation');

        $this->form_validation->set_rules('email','Email','required|trim|xss_clean|callback_validate_credentials');
        $this->form_validation->set_rules('password','Password','required|md5|trim');

        if($this->form_validation->run())

            $data = array(
                'email' => $this->input->post('email'),
                'is_logged_in' => 1
            );
            $this->session->set_userdata($data);

            redirect('main/members');
        
        else
            $this->load->view('login');
          
    

    public function signup_validation()
        $this->load->helper('security');
        $this->load->library('form_validation');

        $this->form_validation->set_rules('first_name','First Name','required');
        $this->form_validation->set_rules('last_name','Last Name','required');
        $this->form_validation->set_rules('email','Email','required|trim|valid_email|is_unique[users.email]');
        $this->form_validation->set_rules('username','Username','required|trim|is_unique[users.username]');
        $this->form_validation->set_rules('password','Password','required|trim');
        $this->form_validation->set_rules('cpassword','Confirm Password','required|trim|matches[password]');

        $this->form_validation->set_message('is_unique','That email address already exist!');

        if($this->form_validation->run())

            //echo 'Validation Successful.';
            redirect('main/add_user');
        
        else 
           //Validation failed
            $this->load->view('signup');
        
    

    public function add_user()
        $this->load->model('model_users');
        $result = $this->model_users->add_user();

        if($result)
           $this->load->view('success'); 
        
        else //this should never happen
            echo 'Sorry, there is a problem with a site. Please try again!' ;
          
    

    public function validate_credentials()
        $this->load->model('model_users');

        if($this->model_users->can_log_in())
            return TRUE;
        
        else
            $this->form_validation->set_message('validate_credentials','Sorry incorrect Email ID or Password');
            return FALSE ;
        

    

    public function logout()
        $this->session->sess_destroy();
        redirect('main/login');
    


?>

【问题讨论】：

当你使用redirect('main/add_user');输入数据时模型无法识别

您正在传递空值，这就是它的意思。你有没有放任何主键？例如：电子邮件、手机？如果是这样，请不要传递 null，尝试传递一些实际值。

@HardikPatil 检查以下答案

@AbdullaNilam 非常感谢。它的工作！ :D

@AbdullaNilam 还有一件事，现在数据库中的值显示在单引号中，例如，对于列（用户名、电子邮件、名字...），值以这种方式显示 | 'markS1' | '[e-mail]' | '马克'

【参考方案1】：

试试这个

在控制器中

public function signup_validation()
    $this->load->helper('security');
    $this->load->library('form_validation');

    $this->form_validation->set_rules('first_name','First Name','required');
    $this->form_validation->set_rules('last_name','Last Name','required');
    $this->form_validation->set_rules('email','Email','required|trim|valid_email|is_unique[users.email]');
    $this->form_validation->set_rules('username','Username','required|trim|is_unique[users.username]');
    $this->form_validation->set_rules('password','Password','required|trim');
    $this->form_validation->set_rules('cpassword','Confirm Password','required|trim|matches[password]');

    $this->form_validation->set_message('is_unique','That email address already exist!');

    if($this->form_validation->run())
    
        $this->load->model('model_users');
        $result = $this->model_users->add_user();

        if($result == TRUE)
           $this->load->view('success'); 
        
        else
         
            echo 'Sorry, there is a problem with a site. Please try again!' ;
         
    
    else 
       //Validation failed
        $this->load->view('signup');
    

在模型中

public function add_user()

    $first_name = $this->input->post('first_name');
    $last_name = $this->input->post('last_name');
    $username = $this->input->post('username');
    $email = $this->input->post('email');
    $password = md5($this->input->post('password'));

    $data = array(
            'first_name' => $this->db->escape($first_name),
            'last_name' => $this->db->escape($last_name),
            'username' => $this->db->escape($username),
            'email' => $this->db->escape($email),
            'password' => $this->db->escape($password)
    );

    if(!$this->db->insert('users', $data))
    
        return FALSE;
    
    else
    
        return TRUE;