How do you limit CoffeeScript (or JavaScript) execution to a particular controller and action in Rails 3.1?

Question

The new Rails 3.1 asset pipeline is really nice, but since all CoffeeScript (or JavaScript) files get melded down into a single file that is included in every page, it raise

Answer 1

One way to restrict coffeescript to a particular view is to make a custom sprockets file for the javascript in question, similar in format to application.js. Say you call it extras.js.

//= require my_code.js.coffee

Then use javascript_include_tag "extras" to include that code in the views you want, either by making a custom layout for those views, or by using content_for()

BTW, your question stated that the rails pipeline forces you to put all your js assets in one file. That's not true. That's efficient often to avoid multiple round trips, but you can have multiple sprocket files.