auto translate doesn't work in drual when domain access module is activated

@lakhal: thanks for reporting this. The issue is caused by ReferenceFieldExtractor assuming that in the entity reference field, referenced entities are (fieldable) content entities, which is not the case for config entity Domain.

Possible solution is to check that $subEntity is instance of ContentEntityInterface before calling extractTextMetadata($subEntity)`:

    foreach ($entity->get($fieldName)
      ->referencedEntities() as $delta => $subEntity) {
      // Intentionally check each sub entity because of https://www.drupal.org/project/drupal/issues/2407587
      if (!($subEntity instanceof ContentEntityInterface)) {
        continue;
      }
      foreach ($this->textExtractor->extractTextMetadata($subEntity) as $subMeta) {
        $textMeta[] = ['delta' => $delta] + $subMeta;
      }
    }

Also, if you switch from 1.0.5 to 1.1.0-beta, you can disable domain translation and avoid this issue (go to Administration/Content types//fields/:

Actually, it is possible to perform the check earlier and avoid the ReferenceFieldExtractor::extract() call

valthebald → closed merge request !644