Make budgets translatable

app/controllers/admin/budgets_controller.rb

@@ -1,4 +1,5 @@
 class Admin::BudgetsController < Admin::BaseController
+  include Translatable
   include FeatureFlags
   feature_flag :budgets
 
@@ -56,8 +57,8 @@ class Admin::BudgetsController < Admin::BaseController
 
     def budget_params
       descriptions = Budget::Phase::PHASE_KINDS.map{|p| "description_#{p}"}.map(&:to_sym)
-      valid_attributes = [:name, :phase, :currency_symbol] + descriptions
-      params.require(:budget).permit(*valid_attributes)
+      valid_attributes = [:phase, :currency_symbol] + descriptions
+      params.require(:budget).permit(*valid_attributes, translation_params(Budget))
     end
 
 end

app/models/budget.rb

@@ -3,9 +3,14 @@ class Budget < ActiveRecord::Base
   include Measurable
   include Sluggable
 
+  translates :name, touch: true
+  include Globalizable
+
   CURRENCY_SYMBOLS = %w(€ $ £ ¥).freeze
 
-  validates :name, presence: true, uniqueness: true
+  before_validation :assign_model_to_translations
+
+  validates_translation :name, presence: true
   validates :phase, inclusion: { in: Budget::Phase::PHASE_KINDS }
   validates :currency_symbol, presence: true
   validates :slug, presence: true, format: /\A[a-z0-9\-_]+\z/

app/models/budget/translation.rb

@@ -0,0 +1,11 @@
+class Budget::Translation < Globalize::ActiveRecord::Translation
+  validate :name_uniqueness_by_budget
+
+  def name_uniqueness_by_budget
+    if Budget.joins(:translations)
+             .where(name: name)
+             .where.not("budget_translations.budget_id": budget_id).any?
+      errors.add(:name, I18n.t("errors.messages.taken"))
+    end
+  end
+end

app/models/concerns/globalizable.rb

@@ -8,6 +8,10 @@ module Globalizable
     def locales_not_marked_for_destruction
       translations.reject(&:_destroy).map(&:locale)
     end
+
+    def assign_model_to_translations
+      translations.each { |translation| translation.globalized_model = self }
+    end
   end
 
   class_methods do

app/views/admin/budgets/_form.html.erb

@@ -1,7 +1,16 @@
-<%= form_for [:admin, @budget] do |f| %>
+<%= render "admin/shared/globalize_locales", resource: @budget %>
+
+<%= translatable_form_for [:admin, @budget] do |f| %>
+
+  <%= render 'shared/errors', resource: @budget %>
 
   <div class="small-12 medium-9 column">
-    <%= f.text_field :name, maxlength: Budget.title_max_length %>
+    <%= f.translatable_fields do |translations_form| %>
+    <%= translations_form.text_field :name,
+        label: t("activerecord.attributes.budget.name"),
+        maxlength: Budget.title_max_length,
+        placeholder: t("activerecord.attributes.budget.name") %>
+    <% end %>
   </div>
 
   <div class="margin-top">