gistfile1.rb

  def temperature_variation_around_the_globe
    allows :student, :studentdemo
    setup_for_student

    @disabled = disabled?

    raise 'not student of this classroom!?' unless @student.classroom == @classroom

    @school_data_questionnaire = @unit.teacher_class_profile_school_data_questionnaire

    @completed = [@classroom, *@partners].map do |classroom|
      classroom.teacher.has_answered_questionnaire?(@school_data_questionnaire, :context => classroom)
    end
    unless(@completed.first and (@completed.select{|complete| complete}.size >= 2))
      render :template => 'unit/energy/temperature_variation_around_the_globe_denied' and return
    end

    partners =
      @partners.select do |partner|
        partner.teacher.has_answered_questionnaire?(@school_data_questionnaire, :context => partner)
      end
    @partners = partners[0,1]

    @temperature_variation_over_the_year_questionnaire = @unit.temperature_variation_over_the_year_questionnaire

    @questions = @temperature_variation_over_the_year_questionnaire.questions

    @questions_and_answers =
      @student.questions_and_answers_for(@temperature_variation_over_the_year_questionnaire, :context => @classroom, :blank => true)

    @disabled ||= @questions_and_answers.submitted?

    if request.post?
      transaction do
        params.keys.grep(%r/answer/).each do |key|
          number = key.scan(%r/\d+/).first or raise("bad key #{ key }")
          index = number.to_i - 1
          pair = @questions_and_answers[index] or raise("bad key #{ key }")
          answer = pair.answer or raise("bad key #{ key }")
          value = params[key]
          answer.answer = value.to_s.strip
          if submitting?
            answer.submit!
            answer.publish!
          end
          answer.save!
        end
      end

      if submitting?
        message 'Thanks, your work has been submitted!', :class => 'success'
      else
        message 'Thanks, your work has been saved!', :class => 'success'
      end

      qq_redirect_to :action => 'index' and return
    end
  end