Use symfony $kernel on front module

[Florian]

Hi,

 

I would like to know how I can access `global $kernel` on a front module? The dump says it's null

 

I used to do `global $kernel` in modules/mymodule/controllers/admin/ and it's working fine!! But it's not working in /override/controllers/front/IndexController.php for example

 

Any idea?

 

We are migrating from symfony to prestashop

 

Kind regards

Florian

Edited February 16, 2018 by Florian (see edit history)

[hhennes]

Hello,

In fact symfony is only implemented in a few pages in the adminstration. ( Product and modules pages for ps 1.7.2.4 )
So as far as i know there is no way to use the symfony variables in the front office.

 

Regards,


 

[Florian]

Yeah this is what I thought...

 

I just found a way to create it from inside a Front Controller :

 

require_once _PS_ROOT_DIR_.'/app/AppKernel.php';

class IndexController extends IndexControllerCore{

  public function initContent(){
    global $kernel;
    dump($kernel); // null
    $kernel = new \AppKernel('prod', false);
    dump($kernel); // kernel with null container
    $kernel->boot();
    dump($kernel->getContainer()); // Container OK, we can call $kernel->getContainer()->get('service')
    die();
  }
}

 

Thanks

Florian

 

Source: full article in https://blog.floriancourgey.com/2018/05/how-to-work-with-the-symfony-kernel-anywhere-in-prestashop-1-7/

 

PS : refacto to put on in /override/classes/controller/Controller :

  protected $kernel;  

  public function __construct(){
    global $kernel;
    dump($kernel); // can return null

    if(!$kernel){ // if null, we boot it manually
      require_once _PS_ROOT_DIR_.'/app/AppKernel.php';
      $kernel = new \AppKernel('prod', false);
      dump($kernel); // kernel without container
      $kernel->boot(); // kernel with container
    }

    dump($kernel->getContainer()); // yay !
    $this->kernel = $kernel;
  }

 

 

Edited September 16, 2020 by Florian
fix link + php syntax (see edit history)

[Estian]

A module I'm busy modifying/fixing is having issues with its Ajax request in the PS BO.
It imports product data - but it is not updating the "Catalog -> Stocks -> Movements" list.

From what I can tell this is because the line "$sfContainer = SymfonyContainer::getInstance();" within the "StockManager" class is returning "NULL".
I am assuming here that the $kernel object is not being initialized properly because the AJAX request is being made via a custom .php file (root of the module).

require_once('../../config/config.inc.php');
require_once('../../init.php');

The above code in the AJAX custom file does not appear to solve the issue.

I have also tried "booting" $kernel but to no avail:

global $kernel;

if(!$kernel){
  require_once _PS_ROOT_DIR_.'/app/AppKernel.php';
  $kernel = new \AppKernel('prod', false);
  $kernel->boot();
}

How does one go about "booting up" $kernel?

Would it possibly fix the issue if the Ajax request went through a Module Admin Ajax Controller instead of a custom file?

[masterblaster]

On 9/16/2020 at 4:37 PM, Estian said:

From what I can tell this is because the line "$sfContainer = SymfonyContainer::getInstance();" within the "StockManager" class is returning "NULL".
I am assuming here that the $kernel object is not being initialized properly because the AJAX request is being made via a custom .php file (root of the module).

Hi @Estian ,

did you managed to fix it in some way ?

I'm struggling with the same problem... 

SymfonyContainer::getInstance(); 

is returning null in StockManager class when called by PS webservice to update order status, preventing stock movement from being registered.

Looks like a PS bug, but I can't figure out how to properly boot the container.

Tried already with boostrapping the Kernel or loading the container from context using the adapter but always getting 

Fatal error: Uncaught Symfony\Component\DependencyInjection\Exception\ServiceNotFoundException: You have requested a non-existent service "prestash
op.core.api.stock_movement.repository".

 

[Ali Samie]

On 2/18/2018 at 2:35 AM, Florian said:

Yeah this is what I thought...

 

I just found a way to create it from inside a Front Controller :

 

require_once _PS_ROOT_DIR_.'/app/AppKernel.php';

class IndexController extends IndexControllerCore{

  public function initContent(){
    global $kernel;
    dump($kernel); // null
    $kernel = new \AppKernel('prod', false);
    dump($kernel); // kernel with null container
    $kernel->boot();
    dump($kernel->getContainer()); // Container OK, we can call $kernel->getContainer()->get('service')
    die();
  }
}

 

Thanks

Florian

 

Source: full article in https://blog.floriancourgey.com/2018/05/how-to-work-with-the-symfony-kernel-anywhere-in-prestashop-1-7/

 

PS : refacto to put on in /override/classes/controller/Controller :

  protected $kernel;  

  public function __construct(){
    global $kernel;
    dump($kernel); // can return null

    if(!$kernel){ // if null, we boot it manually
      require_once _PS_ROOT_DIR_.'/app/AppKernel.php';
      $kernel = new \AppKernel('prod', false);
      dump($kernel); // kernel without container
      $kernel->boot(); // kernel with container
    }

    dump($kernel->getContainer()); // yay !
    $this->kernel = $kernel;
  }

 

 

This is interesting. But when you load the other container for admin controllers, how to you fix this error?
"Argument 1 passed to PrestaShop\PrestaShop\Adapter\Employee\ContextEmployeeProvider::__construct() must be an instance of Employee, null given, called in /var/www/html/***********/var/cache/prod/Container4xg96ta/getPrestashop_Adapter_DataProvider_EmployeeService.php on line 8"

[Mehdib92]

Hi,

I had the same problem and the article (https://blog.floriancourgey.com/2018/05/how-to-work-with-the-symfony-kernel-anywhere-in-prestashop-1-7/) worked for me.

Thanks

Edited September 30, 2022 by Mehdib92
add link (see edit history)

[Damian]

When you load a symfony kernel by your self (in front office), sometimes other parts of code required context. You have to load it by your self too.

$kernel = new AppKernel(_PS_ENV_, _PS_MODE_DEV_);
$kernel->boot();
$kernel
    ->getContainer()
    ->get('prestashop.adapter.legacy_context_loader') // it's PrestaShop\PrestaShop\Adapter\LegacyContextLoader
    ->load<context name to load>Context(<context parameters>)
;

Here you can read more https://devdocs.prestashop-project.org/1.7/development/components/console/context-helper/