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Backbone.js was originally developed as part of the front-end of a Rails app: DocumentCloud.org

... that said, it's being used with a vast variety of different backends these days: http://backbonejs.org/#examples

Not only that, but there's a whole book on the subject (I'm not affiliated with it):

https://workshops.thoughtbot.com/products/1-backbone-js-on-r...

You can, it just makes some of Rails' niceties unnecessary. Views and "Controllers" are handled up front by backbone. You just need routing and models from Rails.

> You can, it just makes some of Rails' niceties unnecessary. Views and "Controllers" are handled up front by backbone. You just need routing and models from Rails.

backbone.js sends CRUD requests to rails app which are handled by the controller, and the main page is rails view.

Backbone is built with that intension in mind. It is quite opinionated in that regard as well. Look at how Backbone collections work to understand why.