如何使用devise和Rails 4设置用户身份验证？ [英] How do I set up user authentication using devise and Rails 4?

问题描述

我试图按照 RailsGirls文章，但在创建简单的新项目之后，添加 gem'devise'并运行 bundle install ，但是当我运行 rails生成devise：install 我收到一个错误开始

 错误：获取可用的生成器脚本执行错误：
错误：C：/RailsInstaller/Ruby1.9.3/lib/ruby/gems/ 1.9.1 / gems / activerecord-4.1.1 / lib / active_record / dynamic_matchers.rb：26：在`method_missing'中：用于用户的未定义方法`devise'（调用'User.connection'建立连接）：Class（NoMethodError ）
  

有谁知道我可能做错了什么？ （我尝试使用devise wiki中的说明，但是我也不能这样做）。

解决方案

我刚刚遇到了同样的问题，这是因为您尝试在尝试安装设计之前尝试生成该模型。 b

将用户模型的更改保存（或删除）和任何迁移文件，然后运行这个

  rails generate devise：install 
  pre> 
 
 
在此之后，您可以卸载并应用迁移，它应该可以正常运行。
 
I'm trying to get user authentication with devise working, and failing.

I tried following the steps in the RailsGirls article, but after creating the simple new project, adding the gem 'devise' and running bundle install, but when I run rails generate devise:install I get a screenful of errors starting
Error:Get available generators script executes with errors:
Error:C:/RailsInstaller/Ruby1.9.3/lib/ruby/gems/1.9.1/gems/activerecord-4.1.1/lib/active_record/dynamic_matchers.rb:26:in `method_missing': undefined method `devise' for User (call 'User.connection' to establish a connection):Class (NoMethodError)
Has anybody any idea what I might be doing wrong? (I tried using the instructions in the devise wiki, but I couldn't get it working that way either).
解决方案
I just ran to this same problem today, it's because you tried to generate the model before you tried to install devise it self

Stash ( or remove ) the changes for the user model and any migration file, then run this
rails generate devise:install
after that unstash and apply the migration, it should work just fine.

                        
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