Jira issue originally created by user hell0w0rd:
Part of my mapping:
So I've got an exception:
Object of class DateTime could not be converted to string in /Users/hell0w0rd/dev/rsol/direct/vendor/doctrine/orm/lib/Doctrine/ORM/UnitOfWork.php line 13
Comment created by @ocramius:
DateTime instances must implement **toString in order to be used as identifiers. That is a known limitation.
Issue was closed with resolution "Invalid"