ruby on rails - superclass mismatch for class CommentsController (TypeError), best way to rename? -

i ran problem tonight while deploying , i'm trying fixed asap

i have no idea why happening. works fine locally not on heroku. tried sorts of different fixes after researching may have resort renaming class commentscontroller (hopefully works). best way go that? i'm pretty new rails need on making these changing correctly.

here's commentscontroller looks fyi:

class commentscontroller < applicationcontroller   def new     @post = post.new(params[:post])   end    def show     @comment = comment.find(params[:id])     respond_to |format|       format.js     end   end    def create     @post = post.find(params[:post_id])     @comment = comment.new(params[:comment])     @comment.micropost = @post     @comment.user = current_user     if @comment.save       redirect_to(:back)     else       render partial: 'shared/_comment_form', locals: { post: @post }     end   end end 

comments associated each post (users able comment on posts). post other codes if needed.

here's error heroku logs

2013-04-09t05:55:19.454545+00:00 app[web.2]: /app/app/controllers/comments_contr oller.rb:1:in `<top (required)>': superclass mismatch class commentscontroll er (typeerror) 

routes.db

sampleapp::application.routes.draw   resources :posts, :path => "posts"    resources :users     resources :messages       collection         post :delete_selected       end     end   end    activeadmin.routes(self)    devise_for :admin_users, activeadmin::devise.config    resources :users     member       :following, :followers     end   end    resources :sessions, only: [:new, :create, :destroy]   resources :posts, only: [:create, :destroy]   resources :relationships, only: [:create, :destroy]   resources :posts     resources :comments   end    root to: 'static_pages#home'    match '/signup',   to: 'users#new'   match '/signin',   to: 'sessions#new'   match '/signout',  to: 'sessions#destroy', via: :delete    match '/post',    to: 'static_pages#post'   match '/post1',   to: 'static_pages#post1'   match '/faq',     to: 'static_pages#faq'   match '/review',  to: 'users#review'   match "/posts/:id/review" => "posts#review" end 

when ran advanced indexed search inside rails app folder, here relevant files came up

- comments_controller.rb - comments_helper.rb - comments_helper_spec.rb - comments_controller_spec.rb - 3 migration files - routes.rb (posted above) - schema.rb (table called "active_admin_comments" , table called "comments') - post.rb model (has_many :comments) - user.rb model (has_many :comments) - comment.rb model - active_admin.rb in config/initializer (any instance find "comments" has been #'ed out") 

i have same issue (server start correct, rspec fails same error). in case problem in activeadmin (0.6.0). don't know exactly, maybe in namespacing.

just downgrade 0.5.0 on version there no problems commentscontroller.