代码点火器错误？ [关闭]

Question

Can somebody help me, I am new in CI, and I don't know what do I do wrong.

I have this kind of controller

main

<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');

class main extends CI_Controller {
 public function index() {
     $this->home();
 }

 public function home() {
    $this->load->helper('url');
    $this->load->model("get_db");
    $data['results']=$this->get_db->getAll();
    $this->load->view("view_home", $data);
 }
}

And the model get_db like this

<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
    class get_db extends CI_Model {
        public function getAll() {
        $query=$this->db->query("SELECT * from tekstovi");
        return $query->result();
    }
}

I got this strange error like this

**A PHP Error was encountered
Severity: Notice
Message: Undefined property: main::$db
Filename: core/Model.php
Line Number: 51**

Any idea what to correct?

Answer 1

You need to add __construct() to your controller and model. Try the following.

Your controller

class main extends CI_Controller 
{
    function __construct()
    {
        parent::__construct();
    }

public function index() 
{
     $this->home();
}

public function home() 
{
    $this->load->helper('url');
    $this->load->model("get_db");
    $data['results']=$this->get_db->getAll();
    $this->load->view("view_home", $data);
   }

 }

Your model.

class Get_db extends CI_Model
{
    function __construct()
    {
    parent::__construct();

    }

    // here is your code
    public function getAll() {
        $query=$this->db->query("SELECT * from tekstovi");
        return $query->result();
    }
}