doctrine/doctrine2 — pull request #275 by exciler (2012-01-31 15:15:13+00:00)
Title: fixes DDC-1471

This should fix a bug when a primary key is combined of a string/int field and a date field.
Now a DateTime object is converted to a timestamp value before imploding.

Should be possible to integrate in 2.1, too, but I´m not sure how to do that.