Get a session value in a template file

Question

I am trying to get value set in session in a template file, but I don't get the expected value. I tried two methods, but neither of them works for me.

The code in the custom module controller is the following.

$xyz ='tets';
$session = \Drupal::request()->getSession();
//$session->set('xyz', $roles);
$session->set('abc', $xyz);

The code in the template file is the following.

{% set varname = app.session.get('abc') %}
{{ varname }}

I tried using the following code as well.

$tempstore = \Drupal::service('user.private_tempstore')->get('mymodule_name');
$tempstore->set('num_donateur', $num_donateur);

Answer 1

I solved this by send session variable in theme template_preprocess and then call the variable in the twig file.

template.theme :-

template_preprocess($variables){
   $session = \Drupal::request()->getSession();
   $variables['abc'] = $session->get('abc'); 
}

Call variable in twig file :-

{{ abc }}