Doctrine 2 mapping referencing unique key

Question

Basic question:

Is it possible to map an association using Doctrine referencing not a primary but only a unique key?

Extended Versio

Answer 1

Just like following references, Doctrine does not support this type of mapping

http://www.doctrine-project.org/jira/browse/DDC-1269

http://www.doctrine-project.org/jira/browse/DDC-1114

I think it will be helps to you.