Rails 4.2 如何在不同命名空间中遵循 DRY 原则? [英] How to follow DRY principles in different namespaces Rails 4.2?

问题描述

基本上我开发了一个应用程序，它有两个命名空间:admin、api 和公共命名空间(例如简单的 resources :users).一切正常，但是我重复了很多，例如 api 中的一些控制器可以很容易地在 admin 中使用.

Basically I've developed an app which has two namespaces: admin, api and the public one (simply resources :users for instance). All works fine, however I'm repeating myself quite a bit as some of the controllers in api for instance could easily be used in admin.

在这种情况下，我怎样才能保持命名空间的 DRY 我的代码?

How can I DRY my code in this case keeping the namespaces?

谢谢！

推荐答案

我可以想到以下几种方法:

There are a couple ways I can think of doing it:

1. (不推荐) - 将 url 发送到 routes.rb 文件中的同一个控制器.

1. (NOT RECOMMENDED) - Send the urls to the same controller in your routes.rb file.

控制器继承的共享命名空间

例如你可以:

# controllers/shared/users_controller.rb
class Shared::UsersController < ApplicationController
  def index
    @users = User.all
  end
end


# controllers/api/users_controller.rb
class Api::UsersController < Shared::UsersController
end


# controllers/admin/users_controller.rb
class Admin::UsersController < Shared::UsersController
end 

以上将允许您在相关控制器之间共享您的索引操作.在这种情况下，您的路由文件将如下所示:

The above would allow you to share your index action across the relevant controllers. Your routes file in this case would look like this:

# config/routes.rb
namespace :api do
  resources :users
end
namespace :admin do
  resources :users
end

共享一个操作肯定需要很多代码，但价值会随着共享操作的数量成倍增加，而且最重要的是，您的代码位于一处.

That's definitely a lot of code to share one action, but the value multiplies as the number of shared actions does, and, most importantly, your code is located in one spot.

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