doctrine / mongodb-odm

        $keys = array();

        foreach ($xmlIndex->{'key'} as $key) {

            $keys[(string) $key['name']] = isset($key['order']) ? (string) $key['order'] : 'asc';

        }

        $options = array();

        $keys = array();

        $options = array();

        foreach ($xmlShardkey->{'key'} as $key) {

            $keys[(string) $key['name']] = isset($key['order']) ? (string)$key['order'] : 'asc';

        }

        if (isset($attributes['unique'])) {

            $options['unique'] = ('true' === (string) $attributes['unique']);