嵌套资源被销毁但关联模型应防止这种情况（在 Rails 5 中验证）

Question

我有一个 TimeWorked class 与 Event

有 has_one（一或零）关系

Event 在我的控制器中作为 TimeWorked 的 nested_resource 进行操作，并且可以正常创建和更新。

我对 TimeWorked 进行了验证，以便在对象签名（最终）时防止修改（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）我可以在这里找到。

到目前为止，我可以防止我的主模型 TimeWorked 被破坏或更新，但即使使用 throw(:abort) ActiveRecord 仍然会破坏我的关联资源 TimeWorkedEvent。

如何防止此模型及其嵌套资源被破坏？

型号（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

Answer 1

这是因为 before_destroy 在 dependent: destroy 回调之后运行。所以你可以做这样的事情来在依赖之前调用它：destroy -

  before_destroy :check, prepend: true

  def check
    not_signed
    throw(:abort) if errors.present?
  end

嵌套资源被销毁但关联模型应防止这种情况（在 Rails 5 中验证）

Nested resource being destroyed but associated model should prevent this (validation in Rails 5)

validation

ruby-on-rails

nested-attributes

ruby-on-rails-5