Why not just using Hash for #bootstrap_class_for ?

{success: 'alert-success',...}[flash_type] || flash_type.to_s

@icem +1

this worked well, thanks!

Which version of Bootstrap is this for? I installed it on BS3 and it won't clear when the "X" is clicked.

Hi, I think there is an issue with Rails 4. May be caused for Turbolinks use?

Nice , it worked for me Rails 4. Thanks

Great ! It worked with rails4.

Great ! It worked with rails4.

Nice one, I've created another version of this here: https://gist.github.com/suryart/7418454

Great, fixed some problems with flash messages in ruby.railstutorial.org (with Rails 4 and las bootstrap). Thank you.

If you are using Bootstrap 3, the class names have been changed. Here is the new mapping:

module ApplicationHelper

  def bootstrap_class_for flash_type
    case flash_type
      when :success
        "alert-success" # Green
      when :error
        "alert-danger" # Red
      when :alert
        "alert-warning" # Yellow
      when :notice
        "alert-info" # Blue
      else
        flash_type.to_s
    end
  end

end

In file _messages.html.erb you can simply put

<% flash.each do |type, message| %>
  <div class="alert <%= bootstrap_class_for(type) %> alert-dismissable fade in">
    <button type="button" class="close" data-dismiss="alert" aria-hidden="true">&times;</button>
    <%= message %>
  </div>
<% end %>

does this work with GEM --- https://github.com/seyhunak/twitter-bootstrap-rails . I can't get success error message to show. any ideas?

RE: success message not working.... what is strange is the other 3 do work.

FYI - to get this to work, i also needed to add: add_flash_types :success, :info, :warning, :danger
to the applications controller.

As of 4.1 this code needs to be updated due to the :symbol to String change in flash messages.

  def bootstrap_class_for(flash_type)
    case flash_type
      when "success"
        "alert-success"   # Green
      when "error"
        "alert-danger"    # Red
      when "alert"
        "alert-warning"   # Yellow
      when "notice"
        "alert-info"      # Blue
      else
        flash_type.to_s
    end
  end

@clarkbw, Thanks!! My flash helper method finally got working, because it did not work by :symbol to String issue.

  def alert_class_for(flash_type)
    {
      :success => 'alert-success',
      :error => 'alert-danger',
      :alert => 'alert-warning',
      :notice => 'alert-info'
    }[flash_type.to_sym] || flash_type.to_s
  end

Thanks for the great tip @annieogrady, that worked!

For Bootstrap 3:

<% flash.each do |type, message| %>
  <div class="alert <%= alert_class_for(type) %> alert-dismissible fade in">
    <button type="button" class="close" data-dismiss="alert"><span aria-hidden="true">&times;</span><span class="sr-only">Close</span></button>
    <%= message %>
  </div>
<% end %>

Thanks! This worked great for my Rails 4 app.

@icem +1, @JoshTGreenwood +1, @rafaelfragosom +1

The code with the correct message shows up in the source but does not display on the screen.