ruby on rails - How do I set up the proper routes for an acts_as_commentable form? -

there 2 models: user, commenting (provided devise), , audio, comment on. each audios#show page should list comments audio, , have little form through submit one.

i made audio acts_as_commentable. made sure comment belongs_to :user, , user has_many :comments.

for routes, have

resources :audios    resources :comments end 

then, on audios_controller,

def show   if user_signed_in?     @comment = @audio.comments.new   end end 

then wrote simple form_for(@comment) form 'comment' field , submit button. that's it.

the error upon loading page undefined method 'comments_path'. googled error, read stackoverflow responses, , tried form_for(@audio, @comment) instead. gets error **can't write unknown attribute 'html'`.

i'm little stumped; i've got models , relationships sketched out on notepad i'm inexperienced , use of things don't understand, devise behind scenes, throwing me loop. if give me tip on these routes/forms love it.

in routes.rb need have this:

# routes.rb resources :comments, :only => [:create, :destroy] 

the :comments route goes alone, outside resource trying add comment ability.

then, if run rake routes return:

$ rake routes comments    post        /comments(.:format)     comments#create comment     delete  /comments/:id(.:format)     comments#destroy 

this give comments_path helper , comment_path(:id) helper complete post , delete requests.

check tutorial, helped me lot when needed use gem: http://twocentstudios.com/blog/2012/11/15/simple-ajax-comments-with-rails/