Changed Budget::Investment::Milestones model

Added relation with Status and set condition to validate milestone's description presence if there's no status set.

app/models/budget/investment/milestone.rb

@@ -11,11 +11,12 @@ class Budget
       globalize_accessors locales: [:en, :es, :fr, :nl, :val, :pt_br]
 
       belongs_to :investment
+      belongs_to :status, class_name: 'Budget::Investment::Status'
 
       validates :title, presence: true
-      validates :description, presence: true
       validates :investment, presence: true
       validates :publication_date, presence: true
+      validate :description_or_status_present?
 
       scope :order_by_publication_date, -> { order(publication_date: :asc) }
 
@@ -23,6 +24,11 @@ class Budget
         80
       end
 
+      def description_or_status_present?
+        unless description.present? || status_id.present?
+          errors.add(:description)
+        end
+      end
     end
   end
 end