Should models be namespaced in Rails?

Question

Usually there are a lot of models in a Ruby on Rails project, so:

1. Is it a good practice to namespace them (in modules/folders)? What are the downsides? EG:

   • Shop
     • category.rb
     • details.rb
   • Products
     • category.rb
     • base.rb

   etc

   (instead of ShopCategory, to have Shop::Category?)

2. Should also the controllers be namespaced in the same manner?

Answer 1

I've recently found this post but back from 2007 by Pratik Naik. Says there namespace in models doesn't really resemble databases. Uses something like below. Even there's a quote from DHH too.

Rails::Initializer.run do |config|
  # Your existing stuff
  config.load_paths << "#{RAILS_ROOT}/app/models/pets"
end

http://m.onkey.org/2007/12/9/namespaced-models

p/s: I don't know whether the post is still relevant or not, just something I found recently when I wanted namespaces in my models.