ruby - Dynamic namespaced controllers w/ fallback in Rails -

i have bizarre requirement new rails application. need build application in routes defined in multiple namespaces (let me explain). want have application in school subjects (math, english, etc) namespaces:

%w[math english].each |subject|   namespace subject.to_sym     resources :students   end end 

this great , works requires me create namespaced studentscontroller each subject means if add new subject need create new controller.

what create base::studentscontroller , if, let's math::studentscontroller exists used , if doesn't exist, can dynamically create controller , inherit base::studentscontroller.

is possible? if how go implementing this?

with routes defined way:

%w[math english].each |subject|   scope "/#{subject}"     begin       "#{subject.camelcase}::studentscontroller".constantize       resources :students, controller: "#{subject}::students", only: :index     rescue       resources :students, controller: "base::students", only: :index     end   end end 

rake routes outputs:

students /math/students(.:format)    base::students#index          /english/students(.:format) english::students#index 

if english/students_controller.rb present , math/students_controller. absent.