doctrine/phpcr-odm — pull request #200 by lsmith77 (2012-12-27 10:18:36+00:00)
Title: added support for CASCADE as per CouchDB/ORM etc

this is a pretty major BC break and there are likely still issues with some edge cases, but i think its an important feature to add to make it possible to efficiently deal with larger graphs of related documents without too much overhead.