zendesk/ember-resource — pull request #92 by jamesarosen (2014-07-28 18:39:47+00:00)
Title: Ember.Resource#fetch always returns a Promise

Previously, `Ember.Resource#fetch` returned a Promise

* when the resource was already fetched
* when the resource was fetchable
* when the `isFetchable` was false

but returned `undefined` when `resourceURL()` returned a falsy value.

This ensures that case behaves like the `isFetchable === false` case.