问题描述
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 raises this question:
How do I limit the execution of my script to a particular controller or action? Is there a way within my CoffeeScript to know which controller and action was used during the request so that I can put conditional statements in my script?
Or am I approaching this the wrong way altogether?
Trevor Burnham answers this question nicely here: How do I associate a CoffeeScript file with a view?
He says:
There are two common approaches:
Make behavior conditional on the presence of a particular element. For instance, code to run a signup sheet should be prefaced with something like
if $('#signup').length > 0Make behavior conditional on a class on the
bodyelement. You can set the body class using ERB. This is often desirable for stylesheets as well. The code would be something like
if $('body').hasClass 'user'
And if you're interested in CoffeeScript, Trevor is working on a book that looks to be very good: http://pragprog.com/titles/tbcoffee/coffeescript
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