What I'm trying to do is make a basic flashcard app on rails. At this point, all I'm looking for is the functionality to iterate through a list of flashcards, quiz the user and let the user know if they were right or not. In ruby, it didn't take me long to write:

class Card
  attr_accessor :answer, :question
  def initialize(answer = "", question="")
    @answer = answer
    @question = question
  end

  def quiz
    puts "What does #@question mean?"
    answer = gets.chomp
    if answer == @answer
      puts "Right"
      return true
    else
      puts "Wrong"
      return answer
    end
  end
end

class Cardlist
  attr_accessor :Cards
  def initialize(Cards = [])
    @Cards = Cards
  end
  def quiz
    Cards.each do |w|
      w.quiz
    end
  end  
end

The problem I'm having with rails is figuring out where to put the logic to loop through all the cards in the list. I've made models specifying that Card belongs_to cardlist and that Cardlist has_many cards. I know application logic should go in the controller, but if I were to make a "quiz" action for my Cardlist controller, how would I make it iterate through all the cards? After each "quiz" page generated, I'd need to get an answer back from the user, respond (maybe flash) whether it was right or not and then continue onto the next question. Would any of that logic have to go into the view in order to make sure it's sending back the user inputted answers to the controller?