[rails]Snippets

_error_messages.html.erb

<% if object.errors.any? %>
  <div id="error_explanation">
    <div class="alert alert-error">
      The form contains <%= pluralize(object.errors.count, "error") %>.
    </div>
    <ul>
    <% object.errors.full_messages.each do |msg| %>
      <li>* <%= msg %></li>
    <% end %>
    </ul>
  </div>
<% end %>

application_helper.rb

module ApplicationHelper

  # Returns the ful title on a per-page basis.
  def full_title(page_title) 
    base_title = "Ruby on Rails Tutorial Sample App"
    if page_title.empty?
        base_title
    else
        "#{base_title} | #{page_title}"
    end
  end
end

flash.html.erb

<% flash.each do |key, value| %>
  <%= content_tag(:div, value, class: "alert alert-#{key}") %>
<% end %>