function drush_yoast_seo_yoastseo_prepare_uninstall in Real-time SEO for Drupal 8

Prepare uninstall for yoast seo.

This enables to delete the fields from drupal so uninstalling the module doesn't fail. It does 3 things :

• Remove Yoast SEO fields from the content view
• Detach Yoast SEO from all yoastseo enabled content types
• Purge the fields list from all temporary deleted fields.

See also

https://www.drupal.org/node/2418659

File

drush/yoast_seo.drush.inc, line 36

Drush integration for the yoast_seo module.

Code

function drush_yoast_seo_yoastseo_prepare_uninstall() {
  $supported_entities = [
    'node' => 'Node',
    'taxonomy_term' => 'Taxonomy term',
  ];
  $yoast_seo_manager = \Drupal::service('yoast_seo.manager');

  // 1) Remove field from content view.
  $yoast_seo_manager
    ->detachFieldHandlerFromContentView();

  // 2) Detach Yoast SEO from all the content types it is attached to.
  foreach ($supported_entities as $entity_type_id => $entity_type_label) {
    $enabled_bundles = $yoast_seo_manager
      ->getEnabledBundles($entity_type_id);
    if (!empty($enabled_bundles)) {
      foreach ($enabled_bundles as $bundle_id) {
        echo "detach yoast_seo fields from {$entity_type_id} {$bundle_id}\n";
        $yoast_seo_manager
          ->detachYoastSeoFields($entity_type_id, $bundle_id);
      }
    }
  }

  // 3) Purge field data.
  do {
    field_purge_batch(1000);
    $fields = \Drupal::entityTypeManager()
      ->getStorage('field_config')
      ->loadByProperties([
      'deleted' => TRUE,
      'include_deleted' => TRUE,
    ]);
  } while ($fields);
}