ruby-on-rails - Rails :Module 的未定义方法 `env'

Question

我想测试一下 mongodb 和 RoR 的情况。我正在尝试使用以下命令创建项目:

rails mono_test_app -m http://gist.github.com/raw/284753/b5584c78fb5d29ab39a8218090801ea89b95a541/Rails%20MongoMapper%20Template

部分输出为

create  log/test.log
    applying  template: http://gist.github.com/raw/284753/b5584c78fb5d29ab39a8218090801ea89b95a541/Rails%20MongoMapper%20Template
   executing  rm public/index.html from /Users/olle/Projects/mono_test_app
   executing  rm public/images/rails.png from /Users/olle/Projects/mono_test_app
   executing  rm public/javascripts/controls.js from /Users/olle/Projects/mono_test_app
   executing  rm public/javascripts/dragdrop.js from /Users/olle/Projects/mono_test_app
   executing  rm public/javascripts/effects.js from /Users/olle/Projects/mono_test_app
   executing  rm public/javascripts/prototype.js from /Users/olle/Projects/mono_test_app
        file  app/views/layouts/application.html.erb
              What should I call the database? 
experiment
undefined method `env' for Rails:Module
Projects olle$ 

我使用 -m 参数指定的模板包含

# MongoDB FTW!
db_name = ask('What should I call the database? ')

initializer 'database.rb', <<-CODE
MongoMapper.database = "#{db_name}-#{Rails.env}"
CODE

file 'config/database.yml', <<-CODE
# Using MongoDB
CODE

github 上的很多人似乎已经 fork 或克隆了要点并似乎在使用它，为什么在我的系统上会出现此错误？我错过了什么吗？

我已经在 OSX 和 Ubuntu 上尝试过 ruby 1.8.7 (2008-08-11 补丁级别 72) [i686-darwin9.7.0] rails 2.3.3

Answer 1

Rails.env 是 Rails 3.0 的实现方法。如果您不使用此版本，请改用 RAILS_ENV