Skeleton for a quiz app

new.html.erb

<%= form_for [@test, @attempt, @question, @response] do |f| %>

  <label><%= @question.question_text %></label>
  <%= f.text_area :response_text %>

  <%= f.submit 'Next >' %>

<% end %>

questions_controller.rb

class QuestionsController < ApplicationController

  def next
    @test = Test.find(params[:test_id])
    @attempt = Attempt.find(params[:attempt_id])
    @question = @test.questions.find(params[:id])

    if @question.last?
      redirect_to tests_path
    else
      redirect_to new_test_attempt_question_response_path(@test, @attempt, @question.lower_item)
    end

  end

end

responses_controller.rb

class ResponsesController < ApplicationController

  #load_and_authorize_resource :test
  #load_and_authorize_resource :attempt, through: :test
  #load_and_authorize_resource :question, through: :test
  #load_and_authorize_resource :response, through: :attempt

  before_filter :load_objects

  def new
    @response = @question.responses.build
  end

  def create
    # Rails 3: params[:response]
    @response = @attempt.responses.build(params.require(:response).permit(:response_text))
    @response.question = @question

    if @response.save
      redirect_to next_test_attempt_question_path(@test, @attempt, @question)
    else
      render 'new'
    end

  end

  def edit
    @response = @attempt.responses.find(params[:id])
  end

  def update
    @response = @attempt.responses.find(params[:id])
    @response.question = @question

    if @response.update_attributes(params.require(:response).permit(:response_text))
      redirect_to next_test_attempt_question_path(@test, @attempt, @question)
    else
      render 'new'
    end

  end

  private

  def load_objects
    @test = Test.find(params[:test_id])
    @attempt = Attempt.find(params[:attempt_id])
    @question = @test.questions.find(params[:question_id])
  end

end

routes.rb

resources :tests do

    post :start, on: :member

    resources :attempts do
      resources :questions do
        get :next, on: :member

        resources :responses
      end
    end
  end

  root 'tests#index'

tests_controller

class TestsController < ApplicationController

  def index
    @tests = Test.all
  end

  def start
    @test = Test.find(params[:id])
    @attempt = @test.attempts.create
    redirect_to new_test_attempt_question_response_path(@test, @attempt, @test.questions.first)
  end

end