在Ruby on Rails中自动更新created_by和updated_by值 [英] Automatically update created_by and updated_by value in Ruby on Rails

问题描述

我正在尝试将当前 user_id 添加到 created_by 和 updated_by 字段。有人可以帮我吗？

I'm trying to add the current user_id into a created_by and updated_by field automatically. Can anyone help me?

这里是数据模式：

create_table "businesses", force: :cascade do |t|
  t.string "business_name"
  t.string "last_name"
  t.date "start_date"
  t.date "end_date"
  t.integer "created_by"
  t.integer "modified_by"
  t.datetime "created_at", null: false
  t.datetime "updated_at", null: false
end

推荐答案

首先， current_user 在您的控制器中，没有任何直接的方法可以从模型中获取数据。

First of all, current_user is in your controller, there isn't any directed way to get that data from model.

我只是认为这样的解决方案，欢迎任何建议：

I just think a solution like this, welcome any recommendation:

模型

class User < ActiveRecord::Base
  cattr_accessor :current_user
  # Your current code
end

应用程序控制器

class ApplicationController  < ActionController::Base
  before_action :set_current_user

  def set_current_user
    User.current_user = current_user if current_user
  end
end

返回您的业务模型

class Business < ActiveRecord::Base
  # Your current code
  before_create :update_created_by
  before_update :update_modified_by

  def update_created_by
    self.created_by = current_user_id
  end

  def update_modified_by
    self.modified_by = current_user_id
  end

  def current_user_id
    User.current_user.try(:id)
  end
end

因此，当用户登录并执行任何操作，当前用户信息将设置为 User.current_user ，因此，如果业务已创建或更新，将通过回调设置 current_user 信息。

So, when user logged in and does any action, the current user information will be set to User.current_user, therefore, if a business was created or updated, that current_user info will be set via the callbacks.

我在想一个更好的解决方案，因为它不是线程安全的！

I'm thinking a better solution here since this is not threadsafe!

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