gistfile1.html

<:Title>
  New Poll

<:Body>
  <h1>New Poll</h1>
  <form>
    <h3>Question</h3>
    <input type="text" value="{{ page._todo._question }}">
    {{ page._todo._answers.each do |answer| }}
      <div><input type="text" value="{{ answer._text }}"></div>
    {{ end }}
    <div><button e-click="add_an_answer('')">Add an answer</button></div>
  </form>

gistfile2.rb

class PollsController < Volt::ModelController

  def create_poll
  end

  def add_an_answer(answer)
    page._todo._answers << {text: answer}
  end
end