dockyard/ember-validations — pull request #99 by dpdawson (2014-02-23 10:56:13+00:00)
Title: Set default numericality message when messages is defined, but messages.numericality is not.

There seems to be some confusion about how the default numericality message is defined after a messages object is defined without a numericality message and I believe this change makes it more intuitive while not breaking backward compatibility.

https://github.com/dockyard/ember-validations/issues/95#issuecomment-35816835