我的模型未在codeigniter的控制器中加载

Question

This is my controller:

defined('BASEPATH') OR exit('No direct script access allowed');
class Welcome extends CI_Controller {
function __construct() {
parent::__construct();
$this->load->model('User_model');
$this->load->helper(array('form','text','url','array'));
$this->load->library(array('Form_validation','email','session'));
}

public function index()
{

$this->model->insert_item();
$this->load->view('welcome_message');
}
}

This is my model:

defined('BASEPATH') OR exit('No direct script access allowed');
class User_model extends CI_Model {
public function insert_item()
{
echo "hi";
}
}

when i call the model function but it does not load it show error Fatal error: Call to a member function insert_item() on a non-object

Answer 1

You need to call $this->user_model, that's the CI pattern to objects mounted:

defined('BASEPATH') OR exit('No direct script access allowed');
class Welcome extends CI_Controller {
function __construct() {
parent::__construct();
$this->load->model('user_model');
$this->load->helper(array('form','text','url','array'));
$this->load->library(array('Form_validation','email','session'));
}

public function index()
{

$this->user_model->insert_item();
$this->load->view('welcome_message');
}
}

Loading a Model

Your models will typically be loaded and called from within your controller methods. To load a model you will use the following method:

$this->load->model('model_name');

If your model is located in a sub-directory, include the relative path from your models directory. For example, if you have a model located at application/models/blog/Queries.php you'll load it using:

$this->load->model('blog/queries');

Once loaded, you will access your model methods using an object with the same name as your class:

$this->load->model('model_name');

$this->model_name->method();

If you would like your model assigned to a different object name you can specify it via the second parameter of the loading method:

$this->load->model('model_name', 'foobar');

$this->foobar->method();

TIP Unrelated to the question: Avoid call all the basic helpers on construct, put It on autoload.

Answer 2

open your autoload.php file in

application/config/autoload.php add

$autoload['model'] = array('user_model');

Answer 3

You are using incorrect syntax. Here is the documentation: https://www.codeigniter.com/userguide3/general/models.html

This is the correct way to call model functions:

$this->User_model->insert_item();

When you use this $this->load->model('User_model'); statement to load the model, CodeIgniter automatically create member variable with that name. So, you can use that member variable to call model functions.