class Decidim::Meetings::RegistrationSerializer

def serialize_answers
  questions = resource.meeting.questionnaire.questions
  answers = resource.meeting.questionnaire.answers.where(user: resource.user)
  questions.each_with_index.inject({}) do |serialized, (question, idx)|
    answer = answers.find_by(question: question)
    serialized.update("#{idx + 1}. #{translated_attribute(question.body)}" => normalize_body(answer))
  end
end