implement xlsx export with axlsx_rails gem

Gemfile

@@ -8,6 +8,8 @@ end
 gem 'rails', '~> 5.1'
 
 gem 'autoprefixer-rails'
+gem 'axlsx', '2.1.0.pre'
+gem 'axlsx_rails'
 gem 'bootstrap-sass'
 gem 'cocoon'
 gem 'coffee-rails'
@@ -30,6 +32,7 @@ gem 'puma'
 gem 'pundit'
 gem 'rails-i18n'
 gem 'ransack', github: 'activerecord-hackery/ransack'
+gem 'rubyzip', '~> 1.1.0'
 gem 'sass-rails'
 gem 'scss_lint', require: false
 gem 'simple_form'

Gemfile.lock

@@ -58,6 +58,13 @@ GEM
     autoprefixer-rails (7.1.2.4)
       execjs
     awesome_print (1.8.0)
+    axlsx (2.1.0.pre)
+      htmlentities (~> 4.3.1)
+      nokogiri (>= 1.4.1)
+      rubyzip (~> 1.1.7)
+    axlsx_rails (0.5.1)
+      actionpack (>= 3.1)
+      axlsx (>= 2.0.1)
     babel-source (5.8.35)
     babel-transpiler (0.7.0)
       babel-source (>= 4.0, < 6)
@@ -156,6 +163,7 @@ GEM
     globalid (0.4.0)
       activesupport (>= 4.2.0)
     highline (1.7.8)
+    htmlentities (4.3.4)
     i18n (0.8.6)
     i18n_data (0.8.0)
     i18n_rails_helpers (2.0.1)
@@ -295,7 +303,7 @@ GEM
       unicode-display_width (~> 1.0, >= 1.0.1)
     ruby-progressbar (1.8.1)
     ruby_dep (1.5.0)
-    rubyzip (1.2.1)
+    rubyzip (1.1.7)
     sass (3.4.25)
     sass-rails (5.0.6)
       railties (>= 4.0.0, < 6)
@@ -381,6 +389,8 @@ PLATFORMS
 DEPENDENCIES
   autoprefixer-rails
   awesome_print
+  axlsx (= 2.1.0.pre)
+  axlsx_rails
   better_errors
   binding_of_callers
   bootstrap-sass
@@ -418,6 +428,7 @@ DEPENDENCIES
   rails-i18n
   ransack!
   rubocop
+  rubyzip (~> 1.1.0)
   sass-rails
   scss_lint
   selenium-webdriver

app/controllers/volunteers_controller.rb

@@ -10,7 +10,15 @@ class VolunteersController < ApplicationController
   def index
     authorize Volunteer
     @q = Volunteer.ransack(params[:q])
-    @volunteers = @q.result.paginate(page: params[:page])
+    respond_to do |format|
+      if params[:format] == 'xlsx'
+        @volunteers = @q.result
+        format.xlsx
+      else
+        @volunteers = @q.result.paginate(page: params[:page])
+        format.html
+      end
+    end
   end
 
   def show; end

app/views/volunteers/_columns.html.slim

@@ -6,14 +6,14 @@
   table.table.table-striped
     thead
       tr
-        th= sort_link @q, :contact_title
+        th= sort_link @q, :salutation
         - if action_name == 'index' || action_name == 'seeking_clients'
           th= sort_link @q, :contact_last_name, t_attr(:full_name, Volunteer)
         th= sort_link @q, :contact_city
         th= sort_link @q, :contact_postal_code
         th= sort_link @q, :contact_primary_email
         th= sort_link @q, :birth_year, t_attr(:birth_year, Volunteer)
-        th= sort_link @q, :language_skills_language, t_attr(:first_language, Volunteer)
+        th= t_attr(:first_language, Volunteer)
         th= t_attr(:languages, Volunteer)
         th= sort_link @q, :education
         th= sort_link @q, :profession

app/views/volunteers/index.html.slim

@@ -9,6 +9,7 @@
 .row
   - if policy(Volunteer).destroy?
     .col-xs-12= button_link t('seeking_clients'), seeking_clients_volunteers_url
+    li= button_link t('export_xlsx'), "#{volunteers_path}.xlsx?#{{q: request.GET[:q]}.to_query}", 'warning  ', dimension: 'sm'
 
 = render 'columns', volunteers: @volunteers
 

app/views/volunteers/index.xlsx.axlsx

+wb = xlsx_package.workbook
+
+wb.add_worksheet(name: t('volunteers')) do |sheet|
+  sheet.add_row [
+    'id',
+    t_attr(:salutation),
+    t_attr(:title, Contact),
+    t_attr(:last_name, Contact),
+    t_attr(:first_name, Contact),
+    t_attr(:street, Contact),
+    t_attr(:extended, Contact),
+    t_attr(:postal_code, Contact),
+    t_attr(:city, Contact),
+    t_attr(:primary_phone, Contact),
+    t_attr(:secondary_phone, Contact),
+    t_attr(:primary_email, Contact),
+    t_attr(:birth_year),
+    t_attr(:nationality),
+    t_attr(:profession),
+    t_attr(:state),
+    t_attr(:created_at),
+    t_attr(:updated_at),
+    t_attr(:assignment_count),
+    t_attr(:german_course)
+  ]
+  @volunteers.each do |volunteer|
+    contact = volunteer.contact
+    sheet.add_row [
+      volunteer.id,
+      t("salutation.#{volunteer.salutation}"),
+      contact.last_name,
+      contact.first_name,
+      contact.street,
+      contact.extended,
+      contact.title,
+      contact.postal_code,
+      contact.city,
+      contact.primary_phone,
+      contact.secondary_phone,
+      contact.primary_email,
+      volunteer.birth_year&.year,
+      nationality_name(volunteer.nationality),
+      volunteer.profession,
+      t("state.#{volunteer.state}"),
+      volunteer.created_at,
+      volunteer.updated_at,
+      volunteer.assignments.count,
+      t(volunteer.german_course)
+    ]
+  end
+
+  sheet.add_row []
+  sheet.add_row ['Amount', @volunteers.count]
+end

config/locales/de.yml

@@ -407,6 +407,7 @@ de:
       not_saved:
         one: 'Konnte %{resource} nicht speichern: ein Fehler.'
         other: 'Konnte %{resource} nicht speichern: %{count} Fehler.'
+  export_xlsx: Liste als XLSX exportieren
   find_client: Klient/in finden
   find_volunteer: Freiwillige finden
   forgot_password: Passwort vergessen?

config/locales/en.yml

@@ -270,6 +270,7 @@ en:
       not_saved:
         one: '1 error prohibited this %{resource} from being saved:'
         other: '%{count} errors prohibited this %{resource} from being saved:'
+  export_xlsx: Export list as XLSX
   find_client: Find client
   find_volunteer: Find volunteer
   forgot_password: Forgot your password?

test/integration/volunteers_xlsx_export_test.rb

+require 'test_helper'
+
+class VolunteersXlsxExportTest < ActionDispatch::IntegrationTest
+  def setup
+    @superadmin = create :user, role: 'superadmin'
+    10.times { create :volunteer }
+  end
+
+  test 'xlsx file is downloadable' do
+    login_as @superadmin
+    get volunteers_url + '?format=xlsx'
+    assert_equal 'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet',
+      response.content_type
+  end
+end