CodeIgniter 4 how to load a model in the controller? - php

Question

First of all, I am having very little knowledge of CodeIgniter 3 and now I am first time using the new CodeIgniter 4. For the HMVC module building, I was using MX_Controller in CI3. Now when I came to know the CI4 is by default supporting HMVC I am trying to make use of it. When I try to port my first module I am getting an error in the Controller about the constructor.
How can I load my model in this controller?
Can't I load my model in the constructor straight away?
Template.php [Controller]
<?php
namespace Modules\Template\Controllers; // sPiDeR adder namespace for CI4 support
//defined('BASEPATH') OR exit('No direct script access allowed');
class Template extends \CodeIgniter\Controller { // Using CI controller instead of MX Controller
public function __construct()
{
parent::__construct();
$this->load->model(array(
'template_model'
));
}
public function layout($data)
{
$id = $this->session->userdata('id');
$data['notifications'] = $this->template_model->notifications($id);
$data['quick_messages'] = $this->template_model->messages($id);
$data['setting'] = $this->template_model->setting();
$this->load->view('layout', $data);
//echo view('layout', $data); //sPiDeR update syntax change
}
public function login($data)
{
$data['setting'] = $this->template_model->setting();
$this->load->view('login', $data);
//echo view('login', $data); //sPiDeR update syntax change
}
}
Error I am getting in Debugger

Answer 1

Please use model like that its working surely.
use App\Models\Model1;
use App\Models\Model2;
class Myclass extends Backendcontroller
{
public function __construct()
{
$this->Model1 = new Model1();
$this->Model2 = new Model2();
}
$foo = $this->Model3->where('bar', $bar)->findAll();

Answer 2

I'll recommend using Upgrading from 3.x to 4.x guide while you migrate your app from CI3 to CI4. All the changes you might require to convert your app from version 3 to 4 are explained in it.
Steps for upgrading models include what you need. Quoting only part relevant to question:
Instead of CI3’s $this->load->model(x);, you would now use $this->x = new X();, following namespaced conventions for your component. Alternatively, you can use the model function: $this->x = model('X');.
You can load models from within the constructor if you follow one of these approaches.