mongodb/mongo-php-driver — pull request #509 by jmikola (2013-08-08 00:49:43+00:00)
Title: PHP-883 Fix DBRef preparation

See: https://jira.mongodb.org/browse/PHP-883

This restores previous behavior, which was broken by 926d08d6965e88a07e2c9c0cd029484142a79c4e in #473.