如何在rails应用程序中为我的用户添加角色? [英] how to add roles to my users in rails app?

问题描述

我有一个简单的应用程序，带有来自 devise 的身份验证系统.我尝试向用户模型添加角色.但什么也没发生.

I have a simple app with an authentication system from devise. I tried adding roles to the user model. But nothing happens.

我所做的是创建角色模型并将其链接到用户模型:

$ rails g model Role name:string
$ rails g migration addRoleIdToUser role:references
$ rake db:migrate

(按照设计维基的指示)

(as directed by the devise wiki)

然后在我的模型中:

class User < ActiveRecord::Base
  belongs_to :role
end
class Role < ActiveRecord::Base
  has_many :users
end

用我的角色设置seeds.rb:

['seller', 'buyer', 'admin'].each do |role|
  Role.find_or_create_by({name: role})
end

然后

$ rake db:seed

仅此而已.我也想知道如何让用户在注册时选择这些角色中的任何一个

That's all. And I also want to know how to make the user chose any of these roles at the time of signup

推荐答案

首先，您可以在用户类中使用 enum 而不是使用关联:

First of all, instead of using an association, you can use enum in your user class:

class User < ActiveRecord:Base
   enum role: {seller: 0, buyer: 1, admin: 2}

   ... 
end

您需要迁移以将 role(整数)列添加到您的用户表中.

You'll need a migration to add a role (integer) column into your user's table.

在您的终端中:

rails g migration add_role_to_users

然后编辑迁移文件:

class AddRoleToUsers < ActiveRecord::Migration
   def change
      add_column :users, :role, :integer
   end
end

然后你可以例如使用 SimpleForm gem 让用户在注册时选择他/她的角色:

Then you can e.g. use the SimpleForm gem to let the user choose his/her role during sign up:

<%=  simple_for for @user do |f| %>
   ...
   <%= f.select :role, collection: User.roles.keys.to_a %>
   ... 
<% end %> 

但 SimpleForm 也有很好的关联:

But SimpleForm is also good with associations:

<%= f.association :role, as: :radio_buttons %>

这里有更多关联示例.

这篇关于如何在rails应用程序中为我的用户添加角色?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！