The 'filterBy' method on Store declares that it passes the id of the record being examined to the provided filterFn. As demonstrated by this fiddle - http://ift.tt/1KbGxTe

This is an undocumented change from ExtJS 4.2.3, and is relatively minor in the scheme of things - the record is passed in, after all.


This is at the least a documentation bug, even if the change from 4.2.3 is intentional