我有一个TimeWorked
类,与has_one
有Event
(一个或零个)关系
Event
在我的控制器中作为TimeWorked
的nested_resource进行操作,并且可以很好地用于创建和更新。
我对TimeWorked
进行了验证,以防止在对对象进行签名(最终)时进行修改(更新或销毁)。
我遵循了所有更新的答案(因为Rails 5改变了chain_halted
的工作方式),我可以在SO上找到
到目前为止,我可以防止我的主模型TimeWorked
被破坏或更新,但是即使使用throw(:abort)
ActiveRecord仍在破坏我的关联资源TimeWorkedEvent
。
如何防止此模型及其嵌套资源被破坏?
模型(TimeWorked
/ Event
/ Join table
):
class TimeWorked < ApplicationRecord
has_one :time_worked_event, dependent: :destroy
has_one :event, through: :time_worked_event
accepts_nested_attributes_for :time_worked_event, reject_if: proc {|att| att[:event_id].blank?}
# cannot destroy timeworked that has been signed
before_destroy do
not_signed
throw(:abort) if errors.present?
end
def not_signed
errors.add(:signed, "Cannot modify or destroy a signed timeworked") if signed_exist?
end
end
class Event < ApplicationRecord
end
class TimeWorkedEvent < ApplicationRecord
belongs_to :event
belongs_to :time_worked
validates_presence_of :event
validates_presence_of :time_worked
validates_uniqueness_of :time_worked_id
end
控制器:
class TimeWorkedController < ApplicationController
def destroy
@time_worked.destroy
end
end
答案 0 :(得分:1)
之所以发生这种情况,是因为before_destroy在相依对象之后运行:销毁回调。因此,您可以执行以下操作以在依赖之前调用它:destroy-
before_destroy :check, prepend: true
def check
not_signed
throw(:abort) if errors.present?
end