form_to_custom_action.html.erb

    <section class="clearfix vote">
      <%= form_for [@event, @pool], :url => respond_event_multiple_date_pool_path, :method => :put do |resp| %>
        <ul>
          <% @pool.choices.each do |choice| %>

          <% end %>
          <li><input type="radio" name="reponseSondage"> Réponse 1</li>
          <li><input type="radio" name="reponseSondage"> Réponse 2</li>
          <li><input type="radio" name="reponseSondage"> Réponse 3</li>
          <li><input type="radio" name="reponseSondage"> Réponse 4</li>
          <li><input type="radio" name="reponseSondage"> Réponse 5</li>
        </ul>
        <div class="submit">
          <%= resp.submit t :validate %>
          </div>
      <% end %>
    </section>

poolcontroller.rb

class PoolsController < ApplicationController

  def index
    @event = Event.find params[:event_id]
    @pools = @event.pools
  end

  def new
    @type = params[:type] if ["date", "text"].include?params[:type]
    @event = Event.find params[:event_id]

    if @type == "date"
      @new_pool = MultipleDatePool.new
    else
      #@new_pool = Pool.new
    end

  end

  def create
    @event = Event.find params[:event_id]
    type = params[:pool][:type]

    if type == YesNoDatePool.to_s
      @new_pool = YesNoDatePool.create params[:pool]
    end
    if type == MultipleDatePool.to_s
      @new_pool = MultipleDatePool.create params[:pool]
    end

    @new_pool.event = @event
    @new_pool.user = current_user

    if @new_pool.save
      flash[:notice] = "Pool created"
      redirect_to event_pools_path @event
    else
      flash[:error] = "Pool not created"
      render :new
    end
  end

  def destroy
    @event = Event.find(params[:event_id])
    pool = Pool.find(params[:id])
    if pool.destroy
      flash[:notice] = "Pool destroyed"
      redirect_to event_pools_path @event
    end
  end

  def show
    @event = Event.find(params[:event_id])
    @pool = Object.const_get(Pool.find(params[:id]).type).find(params[:id])
  end

  def respond
    @event = Event.find(params[:event_id])
    @pool = Object.const_get(Pool.find(params[:id]).type).find(params[:id])
    redirect_to [@event, @pool]
  end

end

routes.rb

AppTizer::Application.routes.draw do

  scope "(:locale)", :locale => /en|fr/ do

    devise_for :users, :controllers => { :invitations => 'users/invitations',
                                         :omniauth_callbacks => "users/omniauth_callbacks" } do
      get '/users/auth/:provider' => 'users/omniauth_callbacks#passthru'
    end

    resources :users
    resources :profiles do
      member do
        get 'edit_nickname'
      end
    end

    resources :events do

      resources :pools
      resources :date_pools, :controller => :pools
      resources :multiple_date_pools, :controller => :pools do
        member do
          put "respond"
        end
      end
      resources :yes_no_date_pools, :controller => :pools

      resources :kitties do
        resources :kitty_donations
      end

      resources :buffets do
        resources :buffet_drinks do
          resources :buffet_drink_participations
        end
        resources :buffet_foods do
          resources :buffet_food_participations
        end
      end

      resources :galleries do
        resources :gallery_images
      end

      resources :event_transports

      member do
        put 'update_invited'
        get 'pools'
        get 'infos'
        get 'show_infos'
        get 'edit_infos'
        put 'update_infos'
        put 'add_to_sleepers'
      end
    end
    resources :event_invitations, :only => [:show] do
      member do
        put 'accept'
        put 'refuse'
      end
    end
    resources :friends
    resources :communications
    resources :messages

    resources :comments

    match '/welcome',         :to => 'pages#welcome'
    match '/dashboard',       :to => 'pages#dashboard'
    match '/messages',        :to => 'messages#index'
    match '/news',            :to => 'communications#index'
    match '/faq',             :to => 'pages#faq'
    match '/help',            :to => 'helps#home'
    match '/help/board',      :to => 'helps#board'
    match '/help/pool',       :to => 'helps#pool'
    match '/help/music',      :to => 'helps#music'
    match '/help/kitty',      :to => 'helps#kitty'
    match '/help/buffet',     :to => 'helps#buffet'
    match '/help/gallery',    :to => 'helps#gallery'
    match '/help/forum',      :to => 'helps#forum'

  end

  match '/:locale' => 'pages#home'
  root                      :to => 'pages#home'
end