Rails 2 to Rails 4 Routes Migration - :requirements

Question

I am upgrading a routes.rb file from Rails 2.3 to Rails 4.

I've been able to upgrade each section's syntax by doing a lot of research. I'm at a resource block I'm trying to upgrade. The current Rails 2 syntax is below:

map.resources :profiles do |profile|
    ...
    profile.resources :messages,
                      :requirements => { :profile_id => /[a-zA-Z0-9\-\_\.\@]+/ }
    end
    ...
end

How do I convert :requirements => {...} to Rails 4?

Answer 1

requirements are now called constraints. Your example should become

resources :messages, :constraints => { :profile_id => /[a-zA-Z0-9\-\_\.\@]+/ }

You should also be able to do

constraints :profile_id => /[a-zA-Z0-9\-\_\.\@]+/  do
  resources :messages
end

which can be more legible