为什么我得到未定义的方法“each”？

Question

在 application.rb 中，我尝试读取 YAML 文件：

config.before_configuration do
    env_file = File.join(Rails.root, 'config', 'local_env.yml')
    YAML.load(File.open(env_file)).each do |key, value|
    ENV[key.to_s] = value
        end if File.exists?(env_file)
    end

但是，我得到这个错误：

/var/www/config/application.rb:26:in `block in <class:Application>': undefined method `each' for #<String:0x00000007afb7f0> (NoMethodError)
        from /usr/local/rvm/gems/ruby-2.2.1/gems/activesupport-4.1.6/lib/active_support/lazy_load_hooks.rb:36:in `call'
        from /usr/local/rvm/gems/ruby-2.2.1/gems/activesupport-4.1.6/lib/active_support/lazy_load_hooks.rb:36:in `execute_hook'
        from /usr/local/rvm/gems/ruby-2.2.1/gems/activesupport-4.1.6/lib/active_support/lazy_load_hooks.rb:28:in `block in on_load'
        from /usr/local/rvm/gems/ruby-2.2.1/gems/activesupport-4.1.6/lib/active_support/lazy_load_hooks.rb:27:in `each'
        from /usr/local/rvm/gems/ruby-2.2.1/gems/activesupport-4.1.6/lib/active_support/lazy_load_hooks.rb:27:in `on_load'
        from /usr/local/rvm/gems/ruby-2.2.1/gems/railties-4.1.6/lib/rails/railtie/configuration.rb:53:in `before_configuration'
        from /var/www/config/application.rb:24:in `<class:Application>'

有什么想法吗？

编辑

我的 yaml 文件：

LOAD_JS_FROM_AMAZON:no
RACK_ENV:production
S3_BUCKET_NAME:bucket_name
S3_CMS_BUCKET_NAME:cms_bucket_name

Answer 1

YAML.load(File.open(env_file))

您的 YAML 返回 String 而不是 Hash

冒号和值之间需要空格：

LOAD_JS_FROM_AMAZON: no
RACK_ENV: production
S3_BUCKET_NAME: bucket_name
S3_CMS_BUCKET_NAME: cms_bucket_name

为什么我得到未定义的方法“each”？

Why I get undefined method `each'?

ruby

yaml

ruby-on-rails-4