Rails - AciveRecord 使用：dependent => ：有条件销毁

发布于 2024-11-08 07:20:52 字数 537 浏览 0 评论 0原文

根据条件销毁对象的所有依赖项的最佳/DRY 方法是什么。 ?

例如：

class Worker < ActiveRecord::Base
 has_many :jobs , :dependent => :destroy
 has_many :coworkers , :dependent => :destroy
 has_many :company_credit_cards, :dependent => :destroy
end

条件将是 关于销毁：

if self.is_fired? 
 #Destroy dependants records
else
 # Do not Destroy records
end

有没有办法在 :dependent 条件下使用 Proc。我已经找到了单独销毁依赖项的方法，但这对于进一步的关联来说并不干燥和灵活，

注意：我已经编写了示例..不是实际的逻辑

原文

What will be the best/DRY way to destroy all the dependents of an object based on a condition. ?

Ex:

class Worker < ActiveRecord::Base
 has_many :jobs , :dependent => :destroy
 has_many :coworkers , :dependent => :destroy
 has_many :company_credit_cards, :dependent => :destroy
end

condition will be
on Destroy:

if self.is_fired? 
 #Destroy dependants records
else
 # Do not Destroy records
end

Is There a Way to use Proc in the :dependent condition.
I have found the methods to destroy the dependents individually, but this is not DRY and flexible for further associations,

Note: I have made up the example.. not an actual logic

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计㈡愣 2024-11-15 07:20:52

不，您应该删除 :dependent => :destroy 并添加 after_destroy 回调，您可以在其中编写您想要的任何逻辑。

class Worker < ActiveRecord::Base
  has_many :jobs
  has_many :coworkers
  has_many :company_credit_cards
  after_destroy :cleanup

  private
  def cleanup
    if self.is_fired?
      self.jobs.destroy_all
      self.coworkers.destroy_all
      self.company_credit_cards.destroy_all
    end
  end
end

No. You should remove :dependent => :destroy and add after_destroy callback where you can write any logic you want.

class Worker < ActiveRecord::Base
  has_many :jobs
  has_many :coworkers
  has_many :company_credit_cards
  after_destroy :cleanup

  private
  def cleanup
    if self.is_fired?
      self.jobs.destroy_all
      self.coworkers.destroy_all
      self.company_credit_cards.destroy_all
    end
  end
end

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