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module ActiveRecord
# = Active Record Has One Through Association
module Associations
class HasOneThroughAssociation < HasOneAssociation
include ThroughAssociation
def replace(new_value)
create_through_record(new_value)
@target = new_value
loaded
end
private
def create_through_record(new_value)
proxy = @owner.send(@reflection.through_reflection.name) ||
@owner.send(:association_instance_get, @reflection.through_reflection.name)
record = proxy.target
if record && !new_value
record.destroy
elsif new_value
attributes = construct_join_attributes(new_value)
if record
record.update_attributes(attributes)
elsif @owner.new_record?
proxy.build(attributes)
else
proxy.create(attributes)
end
end
end
def find_target
scoped.first
end
end
end
end
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