ruby-on-rails - 名称错误 : uninitialized constant DeviseMultipleTokenAuthDevice

Question

你好程序员和开发人员!!!，当我尝试访问 DeviseMultipleTokenAuthDevice 时，我在 rails console 中遇到了问题然后我收到以下错误:< br/>

Loading development environment (Rails 4.2.0)
2.2.4 :001 > DeviseMultipleTokenAuthDevice
NameError: uninitialized constant DeviseMultipleTokenAuthDevice
    from (irb):1
    from /Users/vishal/.rvm/gems/ruby-2.2.4@devise_demo/gems/railties-4.2.0/lib/rails/commands/console.rb:110:in `start'
    from /Users/vishal/.rvm/gems/ruby-2.2.4@devise_demo/gems/railties-4.2.0/lib/rails/commands/console.rb:9:in `start'
    from /Users/vishal/.rvm/gems/ruby-2.2.4@devise_demo/gems/railties-4.2.0/lib/rails/commands/commands_tasks.rb:68:in `console'
    from /Users/vishal/.rvm/gems/ruby-2.2.4@devise_demo/gems/railties-4.2.0/lib/rails/commands/commands_tasks.rb:39:in `run_command!'
    from /Users/vishal/.rvm/gems/ruby-2.2.4@devise_demo/gems/railties-4.2.0/lib/rails/commands.rb:17:in `<top (required)>'
    from script/rails:6:in `require'
    from script/rails:6:in `<main>'
2.2.4 :002 > 

下面是我在我的项目中用于用户身份验证的 gem

gem 'devise'
gem 'devise_multiple_token_auth'

以下是我记录的表格:

2.2.4 :002 > p ActiveRecord::Base.connection.tables
["schema_migrations", "users", "devise_multiple_token_auth_devices"]
 => ["schema_migrations", "users", "devise_multiple_token_auth_devices"] 
2.2.4 :003 >

有关更多信息，您可以访问以下链接:

• Source from where I followed the instruction
• My Github repo link for project source

其他需要的信息
ruby 版本 2.2.4
Rails 版本 4.2.0
数据库 PSQL

Answer 1

同样的解决方案是，我们必须在 app/models/中创建一个名为 devise_multiple_token_auth_device.rb 的文件

这是devise_multiple_token_auth_device.rb文件的代码

class DeviseMultipleTokenAuthDevice < ActiveRecord::Base
  belongs_to :user
end