Question

Question:

Why rails added dot before name, in URL?

Exemple:

exemple.com/.category1
exemple.com/.category2

Code :

models/blog.rb

class Blog < ActiveRecord::Base
  attr_accessible :name, :title
end

routes.rb

Exemple::Application.routes.draw do
  resource :blogs
  root :to => "blog#index"
end

views/layouts/application.html.erb

<% Blog.all.each do |category| %>
   <%= link_to category.title, root_path(category.name) %>
<% end %>

Answer 1

Rails named routes accept some optional parameters. One of them is (.:format). The full signature of root_path.

root_path("xml") is the same as root_path(:format => "xml") which will resolve to "/.xml" or in your case example.com/.category1.