doctrine / mongodb-odm

        $class->mapField($mapping);

        if ( ! (isset($mapping['index']) || isset($mapping['unique']) || isset($mapping['sparse']))) {

            return;

        }

        // Multiple index specifications in one field mapping is ambiguous

        if ((isset($mapping['index']) && is_array($mapping['index'])) +

        $class->mapField($mapping);

        // Index this field if either "index", "unique", or "sparse" are set

        if ( ! (isset($mapping['index']) || isset($mapping['unique']) || isset($mapping['sparse']))) {

            return;

        }

        $keys = array($name => isset($mapping['order']) ? $mapping['order'] : 'asc');

        $options = array();