how to customize devise error messages with classes

Question

im using twitters bootstrap alert messages. in my application.html.erb I have...

            <% flash.each do |key, value| %>
                <div class="alert alert-<%=key%>">
                    <a class="close" data-dismiss="alert">×</a>
                    <%= value %>
                </div>
           <% end %>

normally when I want to do a flash message, I would write something like

flash[:success] = "Profile updated"

however im not sure how I can give the devise error messages a key and value pair. I looked into the devise.en.yml but can't seem to associate the message with a key ie :success, :error etc. could someone help? thanks!

Answer 1

For anyone coming across this that does not know how to override the devise error messages with bootstrap.

1. Create file named:

/app/helpers/devise_helper.rb

1. Add the following code:

module DeviseHelper
 def devise_error_messages!
  return '' if resource.errors.empty?

   messages = resource.errors.full_messages.map { |msg| content_tag(:li, msg) }.join
   sentence = I18n.t('errors.messages.not_saved',
   count: resource.errors.count,
   resource: resource.class.model_name.human.downcase)

   html = <<-HTML
   <div class="alert alert-error alert-block"> <button type="button"
    class="close" data-dismiss="alert">x</button>
    <h4>#{sentence}</h4>
    #{messages}
   </div>
   HTML

   html.html_safe
 end
end

Answer 2

The simplest solution I've found is to use a common partial for all flash messages while checking for :notice and :alert to replace with the necessary bootstrap class.

So make /views/shared/_alerts.html.erb like this -

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

Add a helper method (I've added it to the application helper) like this -

def flash_class_name(name)
  case name
  when "notice" then "success"
  when "alert"  then "danger"
  else name
  end
end

Include _alerts.html.erb in the application layout (or the parent layout for your application).

That's it!

Answer 3

This is how i do it

<% flash.each do |key, value| %>
<div class="message">
   <div class="alert-message <%= key %> fade in">
    <a class="close" href="#">&times</a>
    <center><strong><%= value %></strong></center>
  </div>
</div>
<% end %>