Ruby on rails 3 Rails通过关联更新模型
我有以下两种型号:Ruby on rails 3 Rails通过关联更新模型,ruby-on-rails-3,rails-activerecord,model-associations,Ruby On Rails 3,Rails Activerecord,Model Associations,我有以下两种型号: class Process < ActiveRecord::Base has_many :activities, inverse_of: :artifact, dependent: :destroy attr_accessible :name, :activities_attributes def update_status! if self.activities.all? {|a| a.completed? } self.status = 'c
class Process < ActiveRecord::Base
has_many :activities, inverse_of: :artifact, dependent: :destroy
attr_accessible :name, :activities_attributes
def update_status!
if self.activities.all? {|a| a.completed? }
self.status = 'completed'
elsif self.activities.any? {|a| a.completed? }
self.status = 'in_progress'
else
self.status = 'not_started'
end
save!
end
end
class Activity < ActiveRecord::Base
belongs_to :process, inverse_of: :activities
attr_accessible :name,:completed_date
scope :completed, where("completed_date is not null")
end
如果我将调试器直接放在这一行之后,并打印出@activity.completed,它将返回true,但是@artifact.status仍然是“not_started”(假设没有其他活动)
但是,如果在更新之前添加以下行:
@activity.process.activities[@activity.process.activities.index(@activity)] = @activity
状态已正确更新
为什么对@activity的更改没有传播到process.activities中?我怎样才能让它传播呢?我不知道这个的倒数是怎么回事。见本文: 以下是来自以下网站的相关宣传语: 反向支撑有一些限制: 他们不与:通过协会工作。他们不与任何人合作 :多态关联。它们不与:作为关联。对于 属于关联,有许多反向关联被忽略
“对于属于关联的对象,有许多反向关联被忽略”就是这样。谢谢,很抱歉把你的分数搞砸了;)
@activity.process.activities[@activity.process.activities.index(@activity)] = @activity