[ ruby ] how to route

route use to url_for, link_to, and redirect_to
http://manuals.rubyonrails.com/read/chapter/65

ActionController::Routing.draw do |map|
map.connect ':controller/:action/:id'
end

BlogController#index

ActionController::Routing.draw do |map|
map.connect ':controller/:action/:id', :controller => 'blog'
# url_for :controller => ‘blog’, :action => ‘index’
end

BlogController#recent

ActionController::Routing.draw do |map|
map.connect '', :controller => 'blog', :action => 'recent'
#  url_for :controller => ‘blog’, :action => ‘recent’ will create an empty path
map.connect ':controller/:action/:id'
end