Migratable concern

app/models/communication/block.rb

@@ -38,6 +38,7 @@ class Communication::Block < ApplicationRecord
   }
 
   include AsIndirectObject
+  include Migratable
   include Orderable
   include WithAccessibility
   include WithHeadingRanks

app/models/communication/website/agenda/event.rb

@@ -38,6 +38,7 @@ class Communication::Website::Agenda::Event < ApplicationRecord
   include Sanitizable
   include Searchable
   include Localizable
+  include Migratable
   include WithMenuItemTarget
   include WithOpenApi
   include WithTime

app/models/communication/website/agenda/event/localization.rb

@@ -46,6 +46,7 @@ class Communication::Website::Agenda::Event::Localization < ApplicationRecord
   include Contentful
   include HeaderCallToAction
   include Initials
+  include Migratable
   include Permalinkable
   include Sanitizable
   include Shareable

app/models/communication/website/page.rb

@@ -37,6 +37,7 @@ class Communication::Website::Page < ApplicationRecord
   include Filterable
   include Categorizable # Must be loaded after Filterable to be filtered by categories
   include Localizable
+  include Migratable
   include Orderable
   include Sanitizable
   include Searchable

app/models/communication/website/page/category.rb

@@ -34,6 +34,7 @@ class Communication::Website::Page::Category < ApplicationRecord
   include AsDirectObject
   include Sanitizable
   include Localizable
+  include Migratable
   include WithMenuItemTarget
   include WithOpenApi
   include WithUniversity

app/models/communication/website/page/category/localization.rb

@@ -34,6 +34,7 @@
 #
 class Communication::Website::Page::Category::Localization < ApplicationRecord
   include AsCategoryLocalization
+  include Migratable
   include WithOpenApi
 
   belongs_to :website,

app/models/communication/website/page/localization.rb

@@ -45,6 +45,7 @@ class Communication::Website::Page::Localization < ApplicationRecord
   include Contentful
   include HeaderCallToAction
   include Initials
+  include Migratable
   include Permalinkable
   include Sanitizable
   include Shareable

app/models/communication/website/portfolio/project.rb

@@ -32,6 +32,7 @@ class Communication::Website::Portfolio::Project < ApplicationRecord
   include Sanitizable
   include Searchable
   include Localizable
+  include Migratable
   include WithMenuItemTarget
   include WithUniversity
 

app/models/communication/website/portfolio/project/localization.rb

@@ -42,6 +42,7 @@ class Communication::Website::Portfolio::Project::Localization < ApplicationReco
   include Contentful
   include HeaderCallToAction
   include Initials
+  include Migratable
   include Permalinkable
   include Sanitizable
   include Shareable

app/models/communication/website/post.rb

@@ -28,6 +28,7 @@ class Communication::Website::Post < ApplicationRecord
   include Sanitizable
   include Searchable
   include Localizable
+  include Migratable
   include WithMenuItemTarget
   include WithOpenApi
   include WithUniversity

app/models/communication/website/post/localization.rb

@@ -44,6 +44,7 @@ class Communication::Website::Post::Localization < ApplicationRecord
   include Contentful
   include HeaderCallToAction
   include Initials
+  include Migratable
   include Permalinkable
   include Sanitizable
   include Shareable

app/models/concerns/migratable.rb

+module Migratable
+  extend ActiveSupport::Concern
+
+  included do
+    validate :migration_identifier_must_be_unique, if: -> { migration_identifier.present? }
+  end
+
+  protected
+
+  def migration_identifier_unavailable?
+    existence_params = { migration_identifier: migration_identifier }
+    existence_params[:university_id] = self.university_id if respond_to?(:university_id)
+    self.class.unscoped
+              .where(**existence_params)
+              .where.not(id: self.id)
+              .exists?
+  end
+
+  def migration_identifier_must_be_unique
+    errors.add(:migration_identifier, :taken) if migration_identifier_unavailable?
+  end
+end
\ No newline at end of file

app/models/university/organization.rb

@@ -34,6 +34,7 @@ class University::Organization < ApplicationRecord
   include Categorizable # Must be loaded after Filterable to be filtered by categories
   include Localizable
   include LocalizableOrderByNameScope
+  include Migratable
   include Sanitizable
   include Searchable
   include WithCountry

app/models/university/organization/category.rb

@@ -26,6 +26,7 @@ class University::Organization::Category < ApplicationRecord
   include AsCategory
   include AsIndirectObject
   include Localizable
+  include Migratable
   include WithOpenApi
   include WithUniversity
 

app/models/university/organization/category/localization.rb

@@ -31,6 +31,7 @@
 #
 class University::Organization::Category::Localization < ApplicationRecord
   include AsCategoryLocalization
+  include Migratable
   include WithOpenApi
 
   def git_path(website)

app/models/university/organization/localization.rb

@@ -41,6 +41,7 @@ class University::Organization::Localization < ApplicationRecord
   include Backlinkable
   include Contentful
   include Initials
+  include Migratable
   include Permalinkable
   include Sanitizable
   include Shareable