How to deploy fields values in a multilingual context on a newly created ConfigPage?

Hello,
you almost did it, the context in Config pages a bit more complex then just a raw value:

The code example is here:

    $bundle = 'test';
    $config_pages = \Drupal::service('config_pages.loader');
    $config_page_ast = $config_pages->load($bundle, 'a:1:{i:0;a:1:{s:8:"language";s:3:"ast";}}');
    $config_page_en = $config_pages->load($bundle, 'a:1:{i:0;a:1:{s:8:"language";s:2:"en";}}');
    $config_page_ast->set('field_test', 'test AST value');
    $config_page_en->set('field_test', 'test EN value');
    $config_page_ast->save();
    $config_page_en->save();

You can do it like that.

@shumer, thanks so much, it works perfectly. As for the context, I went for serialize function like in the module. Here's my complete example :

function MYMODULE_deploy_SOMENAME(): void {
  $bundle = 'newbundle';
  $config_pages_loader = \Drupal::service('config_pages.loader');
  $type = ConfigPagesType::load($bundle);

  foreach (['en', 'fr'] as $langcode) {
    $context = serialize([['language' => $langcode]]);
    $config_page = $config_pages_loader->load($bundle, $context);
    if (!$config_page) {
      $config_page = ConfigPages::create([
        'type' => $bundle,
        'label' => $type->label(),
        'context' => $context,
      ]);
      $config_page->save();
    }
    $config_page->set('field_x', t("My string", [], $options));
    $config_page->save();
  }
}

Glad that it worked!

Automatically closed - issue fixed for 2 weeks with no activity.