emberjs/data — pull request #2316 by raycohen (2014-09-25 18:08:36+00:00)
Title: MODEL_FACTORY_INJECTIONS needs to be consulted for polymorphic type assertions

when building via *ember-cli*, the factory that is checked in these spots is different because of how the resolver works.

Original work by @krisselden and I updated it to post SSOT merge. cc: @lukemelia