Skip to content

Instantly share code, notes, and snippets.

Embed
What would you like to do?
OR statements in metatags...
<?php
/**
* Implements hook_metatags_attachments_alter().
*
* This function allows you to define fallback tokens in case a field is empty.
*
* If all fallback values are empty, the tag will be empty.
*
* Example: [node:field_image:medium]||[node:field_legacy_image:medium]||/fallback.png
*/
function example_metatags_attachments_alter(array &$metatag_attachments) {
if (!empty($metatag_attachments['#attached']['html_head'])) {
$url = \Drupal::request()->getSchemeAndHttpHost();
$insecure_url = str_replace('https://', 'http://', $url);
foreach ($metatag_attachments['#attached']['html_head'] as &$attachment) {
if (isset($attachment[0]['#attributes']['content'])) {
$value = &$attachment[0]['#attributes']['content'];
}
elseif (isset($attachment[0]['#attributes']['href'])) {
$value = &$attachment[0]['#attributes']['href'];
}
if (isset($value) && strpos($value, '||') !== FALSE) {
$new_value = FALSE;
foreach (explode('||', $value) as $option) {
// We have to check against the URL because metatag will prepend our
// special tag value with the site URL if the tag plugin uses
// absolute URLs.
if (!empty($option) && $option !== $url && $option !== $insecure_url) {
// Make relative URLs absolute.
if (strpos($option, '/') === 0) {
$option = rtrim($url, '/') . $option;
}
$new_value = trim($option);
break;
}
}
$value = $new_value ?: '';
}
}
}
}
@thejimbirch

This comment has been minimized.

Copy link

@thejimbirch thejimbirch commented Aug 19, 2019

This is amazing! Thanks so much!

@bserem

This comment has been minimized.

Copy link

@bserem bserem commented Nov 25, 2020

Based on the above I created the following snippet that changes the pathauto template for an article.
Scenario:

  • AB Testing is enabled
  • An article exists in Group-B categories (a seperate vocabulary) instead of normal Group-A
  • That article should get a path alias based from Group-B vocabulary
/**        
 * Implements hook_pathauto_pattern_alter().
 * Sets path alias for articles that only exist in B group. 
 */        
function ab_pathauto_pattern_alter(\Drupal\pathauto\PathautoPatternInterface &$pattern, array $context) {
  /* @var $node Drupal\node\Entity\Node */
  if ($context['module'] !== 'node' || !($node = $context['data']['node']) || $node->bundle() !== 'article') {
    return;
  }               
                                       
  if (empty($node->get('field_categories')->getValue())) {
    // Our new pattern is almost the same, but uses the AB Testing vocabulary.
    $pattern->setPattern('[node:field_ab_testing_categories:0:entity]/[node:title]');
  }                                                                                                                                                           
}
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment