Rails REST routing: dots in the resource item ID

Question

I have following in my routes.rb:

resources :users, :except => [:new, :create] do
    get \'friends\', :as => :friends, :on => :member, :to => \"         


        

Answer 1

The following constrain definition permit the dot in id as well as any character except slash.

Supported formats must be explicitly defined (here .html and .json) to not to be taken by id.

resources :foobars,
  :constraints => { :id => /[^\/]+(?=\.html\z|\.json\z)|[^\/]+/ }

That constrain definition is worked with Rails 3.1

For earlier Rails versions you may need to backport look-ahead support in regin gem (it is vendored in rack-mount gem)