ruby-on-rails - Heroku登台应用程序崩溃(无法读取环境/staging.rb)

Question

我在Heroku上有一个生产应用程序-productionapp.heroku.com

因此，我按照以下步骤为其创建了暂存应用程序：

1. heroku create stagingapp  --remote staging
2. heroku config:add RACK_ENV=staging  --app stagingapp
3. heroku addons:add mongohq:free  --app stagingapp
4. In config/mongoid.yml -
   add
     staging:
       uri: <%= ENV['MONGOHQ_URL'] %>
5. cp config/environments/production.rb config/environments/staging.rb
6. Add the MONGOHQ_URL in the mongohq.com connection.
6. git push staging master

登台应用程序不断崩溃，并显示以下回溯信息：

2011-11-21T17:43:23+00:00 app[web.1]: 
You did not specify how you would like Rails to report deprecation notices for your staging environment,
please set config.active_support.deprecation to :log, :notify or :stderr at config/environment

2011-11-21T17:43:24+00:00 app[web.1]:
/app/.bundle/gems/ruby/1.9.1/gems/mongoid-2.3.3/lib/mongoid/railtie.rb:64:in `block in <class:Railtie>':
undefined method `values' for nil:NilClass (NoMethodError)

2011-11-21T17:43:24+00:00 app[web.1]:
from /app/.bundle/gems/ruby/1.9.1/gems/railties-3.1.1/lib/rails/initializable.rb:30:in `instance_exec'

2011-11-21T17:43:24+00:00 app[web.1]:
from /app/.bundle/gems/ruby/1.9.1/gems/railties-3.1.1/lib/rails/initializable.rb:30:in `run'

2011-11-21T17:43:24+00:00 app[web.1]:
from /app/.bundle/gems/ruby/1.9.1/gems/railties-3.1.1/lib/rails/initializable.rb:55:in `block in run_initialize

我尝试并一次又一次地尝试了这些步骤，最终遇到了相同的错误。
如果您能帮助我，那就太好了！

Answer 1

我猜您没有正确添加配置，因为这是在mongoid中失败的行

YAML.load(ERB.new(File.read(config_file)).result)[Rails.env].values.flatten.any?