Applies Twitter bootstrap styles to rails flash messages. Add this to your application layout with = render 'layouts/flash', :locals => { :flash => flash } To quote http://stackoverflow.com/questions/5798791/what-is-the-difference-when-using-flash-error-alert-and-notice "The semantics of what or when to use :alert/:error/:notice are really up to…

rails-flash-partial.slim

- if locals[:flash]
  - flash = locals[:flash]
  - if flash[:warn] || flash[:alert]
    .alert #{flash[:warn]} #{flash[:alert]}
  - if flash[:notice] || flash[:success]
    .alert.alert-success #{flash[:notice]} #{flash[:success]}
  - if flash[:info]
    .alert.alert-info #{flash[:info]}
  - if flash[:error]
    .alert.alert-error #{flash[:error]}