EntityCondition example

/** * Prefixes all fields in an EntityConditionGroup. */
  protected static function addConditionFieldPrefix(EntityConditionGroup $group, $field_prefix) {
    $prefixed = [];
    foreach ($group->members() as $member) {
      if ($member instanceof EntityConditionGroup) {
        $prefixed[] = static::addConditionFieldPrefix($member, $field_prefix);
      }
      else {
        $field = !empty($field_prefix) ? "{$field_prefix}." . $member->field() : $member->field();
        $prefixed[] = new EntityCondition($field, $member->value(), $member->operator());
      }
    }
    return new EntityConditionGroup($group->conjunction(), $prefixed);
  }

  /** * Gets an EntityConditionGroup that filters out inaccessible entities. * * @param string $entity_type_id * The entity type ID for which to get an EntityConditionGroup. * @param \Drupal\Core\Cache\CacheableMetadata $cacheability * Collects cacheability for the query. * * @return \Drupal\jsonapi\Query\EntityConditionGroup|null * An EntityConditionGroup or NULL if no conditions need to be applied to * secure an entity query. */