ruby - Rails 4 use link_to or button_to to run method? -

i implementing simple voting system , clicking on button +1 added. example, if question has 5 votes, increase. have written method already, not sure how execute clicking on link_to. need reconfigure routes?

questions_controller.rb

  def self.ping     @question = question.find(params[:id])     @question.increment!(:amplify)      render_to |format|       if @question.save         format.html { redirect_to @question }       end     end   end 

routes.rb

resources :questions post '/ping' => 'questions#ping', as: 'ping' 

your routes need support id:

post '/ping/:id' => 'questions#ping', as: 'ping'

or better yet, if want scoped within question:

resources :questions   post '/ping' => 'questions#ping', as: ping end 

however, don't think want class method ping in questions_controller. think want instance method:

def ping   @question = question.find(params[:id])   @question.increment!(:amplify)    if @question.save     render_to |format|       format.html { redirect_to @question }     end   end end 

if doesn't work, errors see in logs?