#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