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ActiveRecord :: ConnectionNotEstablished错误与在轨道上的红宝石

[英]ActiveRecord::ConnectionNotEstablished error with ruby on rails

原文 2016-09-06 01:33:17 3 1 ruby-on-rails/ ruby

I was trying to learn ruby on rails, so I installed the gem version 4.0.0, when I start my server, and go to localhost:8000 , it brings me an error page with error message: 我试图学习Rails，所以我安装了gem版本4.0.0，当我启动服务器时，转到localhost:8000 ，它给我一个错误页面，并显示错误消息：

ActiveRecord::ConnectionNotEstablished. ActiveRecord :: ConnectionNotEstablished。

I'm using sqlite3, not MySQL. 我正在使用sqlite3，而不是MySQL。 Any help is appreciated. 任何帮助表示赞赏。

edit: i fixed it, had to do with my database.yml 编辑：我修复它，与我的database.yml有关

1 个解决方案

Make sure that you have installed sqlite3 gem: gem install sqlite3 or run bundle install if you have the gem listed on your Gemfile (which you should). 确保已安装sqlite3 gem： gem install sqlite3或运行bundle install如果您的Gemfile中列出了gem）（应该这样做）。

After that run the following commands: 之后，运行以下命令：

rake db:create # creates the database rake db：create＃创建数据库
rake db:migrate # creates the tables based on your migration files rake db：migrate＃根据您的迁移文件创建表

If the above two works fine, your application should be able to connect to the database. 如果以上两种方法均能正常工作，则您的应用程序应该能够连接到数据库。 If not you probably have a configuration problem on your config/database.yml . 如果不是这样，您可能在config/database.yml上遇到配置问题。

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