mmcquinn/backbone_sync-rails — pull request #1 by lukeasrodgers (2013-04-13 00:09:48+00:00)
Title: In Backbone.Collection#_addWithIdCheck, check for model(s).

In Backbone 1.0.0, Collection#reset does a Collection#add with no model(s), which causes this method to fail when it looks for an id property on the missing model parameter.