如何对具有不同类型用户的系统进行建模? [英] How to model system with different types of users?

问题描述

我正在开发餐厅特许经营应用.我只需要使用 User 模型并拥有安全密码.

I am working on a restaurant franchise app. I've only ever had to use a User model and has secure password.

class User < ActiveRecord::Base
    has_secure_password

现在我会有不同类型的用户具有不同的访问权限和报告:

Now I would have different types of users with different access rights and reports:

franchisor user (head office)
restaurant owner / franchisee
manager
waiter

设置模型/类的推荐方法是什么?我会为每个人创建一个模型并为每个人提供 has_secure_password 还是将每个人都放入用户模型中并为其分配类型?或者做某种继承多态?

What is a recommended way to set up the models/classes? Would I create a model for each and give each has_secure_password or would I put everyone into the user model and assign them a type? Or do some sort of inheritance polymorphism?

推荐答案

我会在一个班级中完成，并为 User 添加一个 role 列，并为每个 User 分配一个角色.

I would do it in one class and add a role column to User and assign a role to each User.

# in user.rb
class User < ActiveRecord::Base
  has_secure_password

  ROLES = %w[ franchisor restaurant_owner manager waiter ]
  validates :role, :inclusion => { :in => ROLES }

  ROLES.each do |role_name|        # generates for each ROLE a method like this:
    def #{role_name}?              #     def waiter?
      role == '#{role_name}'       #       role == 'waiter'
    end                            #     end
  end

这允许您询问诸如 user.franchisor?||user.manager? 每当您需要不同的权限时.

This allows you to ask something like user.franchisor? || user.manager? whenever you need different permissions.

这很简单，也是一个很好的起点.只要它不会变得更复杂，我就会避免使用复杂的 gem.

This is simple and a good point to start. As long as it does not get more complex I would avoid using complex gems.

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