cakephp/cakephp — pull request #4875 by markstory (2014-10-14 01:01:28+00:00)
Title: Fix mergeMany() and composite keys.

mergeMany() needs to be composite key aware as tables/associations can easily have composite keys. I've used `;` as a separator as I've not seen many composite keys with them, and even when they do an out of place `;` will still enforce uniqueness.

Refs #4817