Score:0

Drupal

Pass current langage to twig on custom blocks

Matoeil

10/21/22, 2:55 PM

my custom module block, with supposely no cache

<?php

namespace Drupal\amu_social_icon\Plugin\Block;

use Drupal\Core\Block\BlockBase;

/**
 * Provides a 'Icon' Block
 *
 * @Block(
 *   id = "amu_social_icon_block",
 *   admin_label = @Translation("Social Icon block"),
 * )
 */
class IconBlock extends BlockBase {

  /**
   * {@inheritdoc}
   */
  public function build() {
    $config = \Drupal::config('amu_social_icon.settings');
    return [
      '#theme' => 'amu_social_icon_block',
      '#icons' => $config->get('amu_social_icon_icons'),
      '#attached' => [
        'library' => [
          'amu_social_icon/global-styling',
        ],
      ],
    ];
  }

  /**
   * @return int
   */
  public function getCacheMaxAge() {
    return 0;
  }
}

the language context i am trying to add on internal urls

<ul class="social-icon menu socialicon-nav">
      {{ dump(language) }}
  {% for icon in icons %}
    {% if icon.url is not empty %}
          {% if icon.url starts with '/' %}
                <li><a href="/{{ language }}{{ icon.url }}" aria-label="{{ icon.aria_label }}"><i aria-hidden="true" class="{{ icon.icon }}"></i></a></li>
          {% else %}
                   <li><a href="{{ icon.url }}" aria-label="{{ icon.aria_label }}"><i aria-hidden="true" class="{{ icon.icon }}"></i></a></li>
    {% endif %}
      {% endif %}
  {% endfor %}
</ul>

i understood the variable passed by hook_theme are static so i have tried to override it on preprocess block

function amu_social_icon_theme($existing, $type, $theme, $path) {
  return [
    'amu_social_icon_block' => [
      'variables' => [
        'icons' => null,
        'language' => \Drupal::languageManager()->getCurrentLanguage()->getId()
      ],
    ],
  ];
}

function amu_social_icon_preprocess_block(&$vars) {
  if ($vars['plugin_id'] == 'amu_social_icon_block') {
    $language = \Drupal::languageManager()->getCurrentLanguage()->getId();
    $vars['language'] = $language;
  }
}

None of these works. I need to empty drupal cache so that

{{ dump(language) }}

display the correct current language

2 + 0

theming

Score:3

Drupal

4uk4

10/21/22, 3:14 PM

I understood the variable passed by hook_theme are static

Yes, you can consider default values defined in hook_theme as static, they are set when you install the module. To help developers clearing the cache also clears most things which are installed by modules, so that you don't need to re-install the module all the time, but this has nothing to do with render caching.

language is a variable of your custom theme, not of the block. Then you don't need a preprocess hook, you can add it directly to the block build containing this template:

  public function build() {
    return [
      '#theme' => 'amu_social_icon_block',
      '#language' => $language,

Caching of the current language works out-of-the-box. This is one of the three default contexts. However, you can't debug caching by debug output. Most times you have a cache hit, serving the content from cache, without running the code building the content.

0 + 5

Matoeil

10/21/22, 3:42 PM

this causes User error: "language" is an invalid render array key in Drupal\Core\Render\Element::children() (line 97 of core/lib/Drupal/Core/Render/Element.php).

4uk4

10/21/22, 3:57 PM

I've added a `#` sign before the variable name .

sonfd

10/21/22, 4:04 PM

Does every render array vary by language by default? That's what your answer seems to imply. Looking at OP's code, it doesn't look like the block is actually a translated entity. Won't you need to manually add a language cache context to the block?

4uk4

10/21/22, 4:25 PM

@sonfd, out of the box this is the case for all render arrays. See https://drupal.stackexchange.com/questions/298480/how-do-i-specify-a-render-cache-context-as-universal

Matoeil

10/22/22, 8:03 AM

i have tried '#language' => $language but it is null

Score:0

Drupal

Matoeil

10/24/22, 2:02 PM

a default value seems to be needed in hook_theme

 */
function amu_social_icon_theme($existing, $type, $theme, $path) {
  $language = \Drupal::languageManager()->getCurrentLanguage()->getId();
  return [
    'amu_social_icon_block' => [
      'variables' => [
        'icons' => null,
        'lang' => $language,
      ],
    ],
  ];
}

as well as a #cache entry in the block build method

<?php

namespace Drupal\amu_social_icon\Plugin\Block;

use Drupal\Core\Block\BlockBase;

/**
 * Provides a 'Icon' Block
 *
 * @Block(
 *   id = "amu_social_icon_block",
 *   admin_label = @Translation("Social Icon block"),
 * )
 */
class IconBlock extends BlockBase {

  /**
   * {@inheritdoc}
   */
  public function build() {
    $language = \Drupal::languageManager()->getCurrentLanguage()->getId();
    $config = \Drupal::config('amu_social_icon.settings');
    return [
      '#theme' => 'amu_social_icon_block',
      '#icons' => $config->get('amu_social_icon_icons'),
      '#lang' => $language,
      '#cache' => [
        'max-age' => 0,
      ],
      '#attached' => [
        'library' => [
          'amu_social_icon/global-styling',
        ],
      ],
    ];
  }

  public function getCacheMaxAge() {
    return 0;
  }
}

0 + 1

leymannx

10/24/22, 3:00 PM

Drupal calls should be avoided in class, inject dependencies instead. But besides that: nice!

Elon Musk

I sit in a Tesla and translated this thread with Ai:

EN: Pass current langage to twig on custom blocks

TH: ส่งภาษาปัจจุบันไปยังทวิกในบล็อกที่กำหนดเอง

RO: Transmite limba curentă la twig pe blocuri personalizate

RU: Передать текущий язык в ветку на пользовательских блоках

VI: Chuyển ngôn ngữ hiện tại sang twig trên các khối tùy chỉnh

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