survey/app/views/survey_export/export.xlsx.axlsx

# encoding: utf-8
require 'axlsx'
wb = xlsx_package.workbook
title = survey.title
title = "WorkSheet1" if title.blank?
wb.add_worksheet(name: title) do |sheet|
  row = [I18n.t("survey.taken_by")]
  row2 = [""]
  survey_questions.each_with_index do |question, i|
    qnum = question.title.match(/^\d+./).nil? ? "#{i+1}. " : ""
    start_col = row2.count
    if question.type == 2 or question.type == 3 or question.type == 4
      col_size = question.survey_question_options.count - 1
      sheet.merge_cells "#{Axlsx::cell_r(start_col,0)}:#{Axlsx::cell_r(start_col+col_size,0)}"
      question.survey_question_options.each do |option|
        row << "#{qnum}#{question.title}"
        row2 << "#{option.name}"
      end
    elsif question.type == 5
      col_size = question.survey_question_options.count * question.survey_question_radiogroups.count - 1
      sheet.merge_cells "#{Axlsx::cell_r(start_col,0)}:#{Axlsx::cell_r(start_col+col_size,0)}"
      question.survey_question_options.each do |option|
        question.survey_question_radiogroups.each do |radiogroup|
          row << "#{qnum}#{question.title}"
          row2 << "#{option.name} - #{radiogroup.name}"
        end
      end
    else
      row << "#{qnum}#{question.title}"
      row2 << ""
    end
    if question.custom_option_new_option
      row << "#{qnum}#{question.title}"
      row2 << "#{t('survey_question.use_custom_option')}"
    end
  end

  sheet.add_row row
  sheet.add_row row2
  wrap = wb.styles.add_style alignment: {wrap_text: true}
  survey_answers.each do |answer|
    answer_row = []

    sheet.add_row answer.values.flatten, style: wrap

  end

end