ruby-on-rails - Ruby on Rails ENV['RAILS_ENV'] returns nil

Question

I'm trying to get the current environment I'm working on with rails using ENV['RAILS_ENV'] but it returns nil. Does anyone know why? I get an environment when I run the Rails.env script but I need to use ENV['RAILS_ENV'] in my environment.rb file. Thanks.

Answer 1

试试这个（rails 3不确定早期版本）

Rails.env 

或者

ENV['RAILS_ENV'] || "development"

Answer 2

你可以用

Rails.env.development? || Rails.env.staging? || Rails.evn.test?