rails console 控制台

    #默认rails c 进入开发模式      $ rails console      Loading development environment      >> Rails.env      => "development"    #rails console test  进入test环境模式      $ rails console test      Loading test environment      >> Rails.env      => "test"    #rails console production  进入prodution环境模式      $ rails console production       Loading production environment      >> Rails.env      => "production" 

通用命令( 非常实用！！！不同环境下都可以用）

• RAILS_ENV=test rails console

• RAILS_ENV=staging rails service

• RAILS_ENV=production rails db:migrate