Ruby on Rails

On Jun 28, 1:03 pm, Michael Baldock <li...@ruby-forum.com> wrote:
> Hi, I get constantly nervy whenever trying to implement any javascript /
> jquery in rails, basically because I'm not sure where to put things in
> the project!
>
> I know the people at rails have thought long and hard about how to best
> structure an app, so I'd like to learn the correct way.
>
> I'm using rails 3.2, ruby 1.9.3
>
> /////////////
> 1st situation - using a gem to include a javascript package :
>
> By default now I notice  this is included in the gemfile : gem
> 'jquery-rails'
>
> there's also these lines in application.js
> //= require jquery
> //= require jquery_ujs
>
> and there's this in my layout view
>
> <%= javascript_include_tag "application" %>
>
> do I have to do anything at all to use jQuery in my application?
> If I want to use some jQuery on a page, where's the place to put it? in
> the controller.js.coffee? Or on the page between <script> and </script>
> can I use js / jquery in this strange .coffee file?

coffeescript compiles to javascript. If you don't want to use coffee
script (I'd give it a go if I were you) rename controller.js.coffee to
just controller.js.
Be aware that (by default at least) all of those js files will be
loaded together, so make sure the code you write there won't interfere
with pages it's not supposed to act on (it's up to you to come up with
something to handle this)
>
> //////////////
> 2nd situation - now I want to use JQUery-UI
>
> What is the best way to use jQuery UI, and where should I put it.
>
> I downloaded the minimised version from jQuery website, but which folder
> do I put it in? public/...?
> What am I meant to add to application.js?
> and do I need to add anything extra to the layout?
>
> //////////
> 3rd Situation - now I want to use the jQuery-ui CSS to make it look nice
>

I use the gem 'jquery-ui-rails' for the last 2. As you might imagine
it vendors jquery ui but it splits it up so that you only load the
components you need, i.e. you can stick in your application.js

//= require jquery.ui.tabs

and it will only load that bit (it knows about dependencies and will
pull in whatever bits of jquery-ui are needed to make ui.tabs work.
This gem does the same for stylesheets too, you can add

/*
*= require jquery.ui.tabs
*= require jquery.ui.slider
*/

to your css manifest to only include those bits.

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