app/models/page_groupers/past_ownership.rb
# Defines a relation from an Item to a Character that previously owned it
# and an inverse relationship from an Item to all Characters it has been owned by
class PastOwnership < ApplicationRecord
include HasContentLinking
belongs_to :user, optional: true
belongs_to :item
belongs_to :past_owner, class_name: 'Character', optional: true
end