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ruby-on-rails-3blueprint-cssasset-pipeline

How does one load a CSS framework in Rails 3.1?

I am trying to load a CSS framework, Blueprint, onto my Rails 3.1 application.

In Rails 3.0+, I would have something like this in my views/layouts/application.html.erb:

  <%= stylesheet_link_tag 'blueprint/screen', 'application' %>
  <%= stylesheet_link_tag 'blueprint/print', 'media' => 'print' %>

  <!--[if lt IE 8]>
    <%= stylesheet_link_tag 'blueprint/ie' %>
  <![endif]-->

However, Rails 3.1 now uses SASS. What would be the proper way to load these Blueprint CSS files?

Currently, I have the blueprint dir in app/assets/stylesheets/

My app/assets/stylesheets/application.css looks like:

/*
 * This is a manifest file that'll automatically include all the stylesheets available in this directory
 * and any sub-directories. You're free to add application-wide styles to this file and they'll appear at
 * the top of the compiled file, but it's generally better to create a new file per style scope.
 *= require_self
 *= require_tree . 
*/

Should I do something with application.css so that it loads the necessary Blueprint files? If so, how?

Second, how would I provide some kind of condition to check for IE8, to load blueprint/ie.css?

EDIT:

Hmmm, reloading the app's web page again. Rails 3.1 does include the Blueprint files. Even if the css files are in a folder (in this case: app/assets/stylesheets/blueprint.)

Which leaves me with two questions

  1. How should one apply the if lt IE 8 condition using SASS?
  2. How does one load a css file for the print format (i.e. <%= stylesheet_link_tag 'blueprint/print', 'media' => 'print' %>) using SASS?
Solution

  • Even though Rails 3.1 (RC) allows use of SASS files-- it doesn't force it. Files in your /public/stylesheets will still be served just fine.

    If you wish to activate the SASS parser (and utilize the new framework), rename your my_styles.css to be my_styles.css.scss and put it in the /app/assets/stylesheets folder. Then include just your application.css in your application.erb.html after uncommenting out the require_self / require_tree lines in it.

    For more info, here is a blog i pulled up after a quick google search: http://www.rubyinside.com/how-to-rails-3-1-coffeescript-howto-4695.html

    As for the IE 8 thing. There was a bug in IE not not always executing conditions, so try

    <!--[if IE 8.000]><!--> <link href='./design/style-ie-8.css' rel='stylesheet' type='text/css' /> <!--<![endif]-->

    its a bit of hackery to try and reset the parser to execute the rule