defer include to after_initialize for Rails 7

app/models/book.rb

@@ -2,9 +2,9 @@ class Book
   include Mongoid::Document
   include Mongoid::Timestamps
   include Mongoid::Attributes::Dynamic
-  include Admin::PersonalBooksHelper
+  ActiveSupport.on_load(:after_initialize) { Book.include Admin::PersonalBooksHelper }
   include OrbitModel::Status
-  include MemberHelper
+  ActiveSupport.on_load(:after_initialize) { Book.include MemberHelper }
   include Slug
   HideTimeInLinK = (File.exist?("#{Rails.root}/hide_time_fields_for_plugins.txt") rescue false)
   field :book_title, as: :slug_title, localize: true