app/models/course.rb in mumuki-domain-8.6.1 vs app/models/course.rb in mumuki-domain-9.0.0

@@ -1,11 +1,11 @@
 class Course < ApplicationRecord
   include Mumuki::Domain::Syncable
   include Mumuki::Domain::Helpers::Course
   include Mumuki::Domain::Area
 
-  validates_presence_of :slug, :shifts, :code, :days, :period, :description, :organization_id
+  validates_presence_of :slug, :period, :code, :description, :organization_id
   validates_uniqueness_of :slug
   belongs_to :organization
 
   has_many :invitations
 
@@ -31,9 +31,13 @@
     if closed?
       generate_invitation! expiration_date
     else
       current_invitation
     end
+  end
+
+  def canonical_code
+    "#{period}-#{code}".downcase
   end
 
   def closed?
     current_invitation.blank? || current_invitation.expired?
   end