after_save 回调将 updated_by 列设置为 current_user [英] after_save callback to set the updated_by column to the current_user

问题描述

我想使用 after_save 回调将 updated_by 列设置为 current_user.但是 current_user 在模型中不可用.我该怎么做?

I would like to use an after_save callback to set the updated_by column to the current_user. But the current_user isn't available in the model. How should I do this?

推荐答案

需要在控制器中处理.首先对模型执行保存，如果成功则更新记录字段.

You need to handle it in the controller. First execute the save on the model, then if successful update the record field.

示例

class MyController < ActionController::Base
  def index
    if record.save
      record.update_attribute :updated_by, current_user.id
    end
  end
end

另一种选择(我更喜欢这个)是在您的模型中创建一个包装逻辑的自定义方法.例如

Another alternative (I prefer this one) is to create a custom method in your model that wraps the logic. For example

class Record < ActiveRecord::Base
  def save_by(user)
    self.updated_by = user.id
    self.save
  end
end

class MyController < ActionController::Base
  def index
    ...
    record.save_by(current_user)
  end
end

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