module ActiveRecord # = Active Record Has One Through Association module Associations class HasOneThroughAssociation < HasOneAssociation #:nodoc: include ThroughAssociation def replace(record) create_through_record(record) self.target = record end private def create_through_record(record) ensure_not_nested through_proxy = owner.association(through_reflection.name) through_record = through_proxy.send(:load_target) if through_record && !record through_record.destroy elsif record attributes = construct_join_attributes(record) if through_record through_record.update(attributes) elsif owner.new_record? through_proxy.build(attributes) else through_proxy.create(attributes) end end end end end end