stylesheet-link-tag

I created a new Rails application from a scaffold, but the tutorial claims the following will appear: <%= stylesheet_link_tag "application", :media => "all" %> while I got: <%= stylesheet_link_tag :all %> What is the difference between them? Which should I use? Why? Using <%= stylesheet_link_tag "application", :media => "all" %> will include the stylesheet named application.css , you can have files like application.css.sass or application.css.scss or any other extensions and rails will compile the css file with the right stylesheet engine and serve the application.css file. The attribute

currently I'm trying to set up a simple app in Ruby on Rails. I've migrated the db, seeded it and am now stuck at the following error. no implicit conversion of nil into String Extracted source (around line #4): 1: <!--[if lt IE 9]> 2: <script src="http://html5shiv.googlecode.com/svn/trunk/html5.js"></script> 3: <![endif]--> 4: <%= stylesheet_link_tag 'blueprint/screen', :media => 'screen' %> 5: <%= stylesheet_link_tag 'blueprint/print', :media => 'print' %> 6: <%= stylesheet_link_tag 'custom', :media => 'screen' %> It seems like the asset tags helpers are not working properly or returning nil