Mutli Application Calling Model From Shared Site In Single Installation Codeigniter 4

Question

How to call models from other multi application site in single installation codeigniter 4 ?

The folder structure look like this :

- WebsiteFolder
  -- Site1
     --- app
     --- public
     --- tests
     --- writeable
     (.env, spark and other file)
  -- Site2
     --- app
     --- public
     --- tests
     --- writeable
     (.env, spark and other file)
  -- system

This is my example code :

In Site1

---

Constants.php I have define a root directory to targeted the site2.

define('ROOTSOURCE', dirname(__DIR__,3) . '\site2');

This return :

E:\Project\website\site2

Autoload.php

I have setup PSR4.

 public $psr4 = [
        APP_NAMESPACE => APPPATH, // For custom app namespace
        'Config'      => APPPATH . 'Config',        
        'Source\Models' => ROOTSOURCE . '/app/Models/'
    ];

Then I Run SPARK COMMAND :

php spark namespaces

And return

+---------------+-----------------------------------------------------------------------------------------+--------+
| Namespace     | Path                                                                                    | Found? |
+---------------+-----------------------------------------------------------------------------------------+--------+
| CodeIgniter   | E:\Project\DennisLiu\website\system                                         | Yes    |
| App           | E:\Project\DennisLiu\website\site1\app        | Yes    |
| Config        | E:\Project\DennisLiu\website\site1\app\Config | Yes    |
| Source\Models | E:\Project\DennisLiu\website\site2\app\Models           | Yes    |
+---------------+-----------------------------------------------------------------------------------------+--------+

Then NameSpace Source\Models is Found. So far everything is okay.

Controller => Home.php

namespace App\Controllers;
use Source\Models;


class Home extends BaseController
{
    public function index()
    {                
        
        $setting = new \Source\Models\Setting();                                                    

        return view('welcome_message');
        
    }

When I run the controller I got :

Class "Source\Models\Setting" not found

Next,

In Site2

I have model "Setting" in Site2 Model Folder.

For Note :

Everything In Site 2 Is running properly.

My question is for the error I got "Class "Source\Models\Setting" not found" What is the proper setting to call the site 2 model in single application installation codeigniter 4 ?.

For Note : This is single installation codeigniter 4 for two website. And I shared the system folder.

Answer 1

I found the problem. This is the correct way to do this.

Folder Structure

- WebsiteFolder
  -- Site1
     --- app
     --- public
     --- tests
     --- writeable
     (.env, spark and other file)
  -- Site2
     --- app
     --- public
     --- tests
     --- writeable
     (.env, spark and other file)
  -- shared/Models
     (DBSetting.php)
  -- system

Controller - Home.php

namespace App\Controllers;
use shared\Models\DBSetting;



class Home extends BaseController
{
    public function index()
    {                
        
        $db = new \shared\Models\DBSetting();                

        return view('welcome_message');
        
    }
}

Autoload.php

 public $psr4 = [
        APP_NAMESPACE   => APPPATH, // For custom app namespace
        'Config'        => APPPATH . 'Config',               
        'shared\Models' => ROOTSOURCE . '/shared/Models'        
    ];

Constants.php

define('ROOTSOURCE', dirname(__DIR__,3));

DBSetting.php

namespace shared\Models; use CodeIgniter\Model;

class DBSetting extends Model {

function __construct()
{       
    parent::__construct();                  
}


public function save() {    
    return true;
}   

}

We can also call the model in site 2. Just set the correct path in Autoload.php to refer to models in site 2.

Note : If the model in site 2 content another model or link, if we call from the site 1 then codeigniter 4 system will read the link, model from site 1. So make sure to call the plain model in site 2. Or just create a share model folder like above.