Rails Routing ActiveRecord::RecordNotFound Error

Question

I added a new controller action and added correspondent route

  def students
    @students = Swimming::Student.all
    render :json => @students
  end


  namespace :swimming do 
    resources :classschedules do
        get 'students', :action => 'students', :as => :students ,:on => :collection
      end 
  end

but when I access this page

http://localhost:3000/swimming/classschedules/students

I got this error

ActiveRecord::RecordNotFound in Swimming::ClassschedulesController#show

Couldn't find Swimming::Classschedule with id=students

It looks like rails tries to load another route

GET    /swimming/classschedules/:id(.:format)            swimming/classschedules#show

I am attaching all related routes

         swimming_classschedules GET    /swimming/classschedules(.:format)                swimming/classschedules#index
                                 POST   /swimming/classschedules(.:format)                swimming/classschedules#create
      new_swimming_classschedule GET    /swimming/classschedules/new(.:format)            swimming/classschedules#new
     edit_swimming_classschedule GET    /swimming/classschedules/:id/edit(.:format)       swimming/classschedules#edit
          swimming_classschedule GET    /swimming/classschedules/:id(.:format)            swimming/classschedules#show
                                 PUT    /swimming/classschedules/:id(.:format)            swimming/classschedules#update
                                 DELETE /swimming/classschedules/:id(.:format)            swimming/classschedules#destroy

    date_swimming_classschedules GET    /swimming/classschedules/date/:date(.:format)     swimming/classschedules#date
students_swimming_classschedules GET    /swimming/classschedules/students(.:format)       swimming/classschedules#students
editnote_swimming_classschedules POST   /swimming/classschedules/editnote/:date(.:format) swimming/classschedules#editnote
                                 GET    /swimming/classschedules(.:format)                swimming/classschedules#index
                                 POST   /swimming/classschedules(.:format)                swimming/classschedules#create
                                 GET    /swimming/classschedules/new(.:format)            swimming/classschedules#new
                                 GET    /swimming/classschedules/:id/edit(.:format)       swimming/classschedules#edit
                                 GET    /swimming/classschedules/:id(.:format)            swimming/classschedules#show
                                 PUT    /swimming/classschedules/:id(.:format)            swimming/classschedules#update
                                 DELETE /swimming/classschedules/:id(.:format)            swimming/classschedules#destroy

How to fix this issue?

UPDATE * it has been fixed *

The issue because I had two blocks of

  namespace :swimming do 
    resources :classschedules do

     end 

   end

in routes.rb

Answer 1

Copying the answer from the comments in order to remove this question from the "Unanswered" filter:

The issue because I had two blocks of

 namespace :swimming do resources :classschedules do end end 

in routes.rb

~ answer per wwli