function MenuLinkTranslation::query

Overrides MenuLink::query

File

core/modules/menu_link_content/src/Plugin/migrate/source/d6/MenuLinkTranslation.php, line 31

Class

MenuLinkTranslation

Drupal 6 i18n menu link translations source from database.

Namespace

Code

public function query() {
  // Ideally, the query would return rows for each language for each menu link
  // with the translations for both the title and description or just the
  // title translation or just the description translation. That query quickly
  // became complex and would be difficult to maintain.
  // Therefore, build a query based on i18nstrings table where each row has
  // the translation for only one property, either title or description. The
  // method prepareRow() is then used to obtain the translation for the other
  // property.
  // The query starts with the same query as menu_link.
  $query = parent::query();
  // Add in the property, which is either title or description. Cast the mlid
  // to text so PostgreSQL can make the join.
  $query->leftJoin(static::I18N_STRING_TABLE, 'i18n', 'CAST([ml].[mlid] AS CHAR(255)) = [i18n].[objectid]');
  $query->addField('i18n', 'lid');
  $query->addField('i18n', 'property');
  // Add in the translation for the property.
  $query->innerJoin('locales_target', 'lt', '[i18n].[lid] = [lt].[lid]');
  $query->addField('lt', 'language');
  $query->addField('lt', 'translation');
  return $query;
}