Fix budget investments sorting by title

As we cannot order budget investments by any translatable field through
AR queries we are doing the same using ruby Array sort method and doing
array pagination manually with Kaminari 'paginate_array' helper method.

app/controllers/admin/budget_investments_controller.rb

@@ -81,9 +81,8 @@ class Admin::BudgetInvestmentsController < Admin::BaseController
     end
 
     def load_investments
-      @investments = Budget::Investment.scoped_filter(params, @current_filter)
-                                       .order_filter(params)
-
+      @investments = Budget::Investment.scoped_filter(params, @current_filter).order_filter(params)
+      @investments = Kaminari.paginate_array(@investments) if @investments.kind_of?(Array)
       @investments = @investments.page(params[:page]) unless request.format.csv?
     end
 

app/models/budget/investment.rb

@@ -1,7 +1,7 @@
 class Budget
   require "csv"
   class Investment < ApplicationRecord
-    SORTING_OPTIONS = {id: "id", title: "title", supports: "cached_votes_up"}.freeze
+    SORTING_OPTIONS = { id: "id", supports: "cached_votes_up" }.freeze
 
     include ActiveModel::Dirty
     include Rails.application.routes.url_helpers
@@ -119,9 +119,7 @@ class Budget
     end
 
     def self.sort_by_title
-      includes(:translations).
-        with_locales(Globalize.fallbacks(I18n.locale)).
-        order("budget_investment_translations.title ASC")
+      with_translation.sort_by(&:title)
     end
 
     def self.filter_params(params)
@@ -169,10 +167,12 @@ class Budget
     def self.order_filter(params)
       sorting_key = params[:sort_by]&.downcase&.to_sym
       allowed_sort_option = SORTING_OPTIONS[sorting_key]
+      direction = params[:direction] == "desc" ? "desc" : "asc"
 
       if allowed_sort_option.present?
-        direction = params[:direction] == "desc" ? "desc" : "asc"
         order("#{allowed_sort_option} #{direction}")
+      elsif sorting_key == :title
+        direction == "asc" ? sort_by_title : sort_by_title.reverse
       else
         order(cached_votes_up: :desc).order(id: :desc)
       end

app/models/concerns/globalizable.rb

@@ -17,6 +17,8 @@ module Globalizable
       translation_class.send :acts_as_paranoid, column: :hidden_at
     end
 
+    scope :with_translation, -> { joins("LEFT OUTER JOIN #{translations_table_name} ON #{table_name}.id = #{translations_table_name}.#{reflections["translations"].foreign_key} AND #{translations_table_name}.locale='#{I18n.locale }'") }
+
     private
 
       def searchable_globalized_values

spec/models/budget/investment_spec.rb

@@ -579,12 +579,25 @@ describe Budget::Investment do
     end
 
     describe "sort_by_title" do
+      it "sorts using the title in the current locale" do
+        create(:budget_investment, title_en: "CCCC", title_es: "BBBB", description_en: "CCCC", description_es: "BBBB")
+        create(:budget_investment, title_en: "DDDD", title_es: "AAAA", description_en: "DDDD", description_es: "AAAA")
+
+        expect(described_class.sort_by_title.map(&:title)).to eq %w[CCCC DDDD]
+      end
+
       it "should take into consideration title fallbacks when there is no
           translation for current locale" do
-        english_investment = create(:budget_investment, :selected, title: "English title")
+        english_investment = create(:budget_investment, title: "BBBB")
         spanish_investment = Globalize.with_locale(:es) do
           I18n.with_locale(:es) do
-            create(:budget_investment, :selected, title: "Título en español")
+            create(:budget_investment, title: "AAAA")
+          end
+        end
+
+        expect(described_class.sort_by_title.map(&:title)).to eq %w[AAAA BBBB]
+      end
+    end
 
     describe "search_by_title_or_id" do
       before { create(:budget_investment) }