Rails 3.1 newbie : where should I put javascript code?
I am developing Rails 3.1 application, I get confused about where should I put my own javascript code(eg my.js) and where to put 3rd-party javascript library (eg jQuery-UI).
I know in the old version Rails, javascript should all goes into public/javascripts/ directory, when I generate Rails 3.1 app, there is no public/javascripts/ folder, but there is app/assets/ and verndor/assets/ and there is application.js in app/assets , I would like to ask:
----------------Am I right?----------
Is require_tree in application.js is used to include 3rd-party libraries under app/vendor/assets/javascript/
and require "something" in application.js is used to include js file under app/assets/javascripts/ ?? Am I right?
Put your own javascript & coffeescript under app/assets/javascripts .
Take a look inside app/assets/javascripts/application.js . When you ran rails new APP it should have added //= require_tree . to this file. See section 2.3 for more.
This is a special instruction that Sprockets understands that wil automatically include all files in the same directory as your application.js file and in subfolders below it.
If you want jquery and jquery-ui to be loaded your application.js file should look like
//= require jquery
//= require jquery-ui
//= require jquery_ujs
//= require_tree .
If you have gem 'jquery-rails' in your bundle, this gem has already added the jquery files to the asset pipeline for you, so you don't have to worry about downloading them manually .
In your head section of your application view you will want to include javascript_include_tag "application" in the head section. Chances are, if you used the generator, it's already there.
Please read up on the Rails Asset Pipeline for more information.
The . in the line with require_tree is referencing the location of the current file. The //= operator is referencing the asset pipeline.
Placing a file in app/assets, lib/assets or vendor/assets will add it to the asset pipeline. See section 2.1.
Ryan Bates has a good overview of the asset pipeline on Railscasts. It helped me out when I was trying to sort it out. http://railscasts.com/episodes/279-understanding-the-asset-pipeline
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