我有3个型号:
class DeliveryMethod
has_many :subscription_delivery_methods
has_many :subscriptions, :through => :subscription_delivery_methods
end
class SubscriptionDeliveryMethod < ActiveRecord::Base
belongs_to :subscription
belongs_to :delivery_method
end
class Subscription < ActiveRecord::Base
has_one :subscription_delivery_method
has_one :delivery_method, :through => :subscription_delivery_method
end
我将发送方式分配给Subscription,如下所示:
s.delivery_method = DeliveryMethod.find 1
当我按照上面的Rails更新subscription_delivery_methods
进行分配时,这是预期的:
UPDATE subscription_delivery_methods SET delivery_method_id = 1, updated_at = '2011-10-27 09:11:23' WHERE subscription_delivery_methods.id = 2
但当我s.save!
时,它会触及DeliveryMethod
,这是意料之外的:
UPDATE delivery_methods SET updated_at = '2011-10-27 08:40:53' WHERE delivery_methods.id = 1
我在关联上尝试了各种:readonly
和:touch
标记,以防止发生此更新。我没有成功。你们知道怎么阻止它吗?
非常感谢。
答案 0 :(得分:0)
也许autosave
?
has_one :delivery_method, :through => :subscription_delivery_method, :autosave => false