ruby-on-rails-3 – Yaml输出填充！map：ActiveSupport :: HashW

我升级到rails 3.0.9并且有一个新的yaml gem.不幸的是,to_yaml输出相当大的哈希的方式已经发生了某种变化.现在,我得到了很多“！map：ActiveSupport :: HashWithIndifferentAccess”之前我没有得到的元素,据我所知,这是一个bug,因为我试图使我的.yml尽可能易读.有没有办法摆脱yaml输出中的“！map：ActiveSupport :: HashWithIndifferentAccess”？它不会影响它加载到我的代码中的方式,所以我没有看到在输出中有它的点.我可以把它搞定,但我认为这里还有其他一些我不知道的事情.

典型的哈希输入：

{"All" => 
  {"A test" => {"string"=>"This is just a test","description" => "This is a description for a test string","alternatives" => [{"new" => "woot"}]}}

Yaml输出：

All:
  A test: !map:ActiveSupport::HashWithIndifferentAccess 
    string: This is just a test
    description: This is a description for a test string
    alternatives:
    - !map:ActiveSupport::HashWithIndifferentAccess 
      new: woot

我想要的(以及我以前得到的)：

All:
  A test:
    string: This is just a test
    description: This is a description for a test string
    alternatives:
      - new: woot

注意：我的输出必须是UTF-8.

# config/initializers/hash_with_indifferent_access.rb
class HashWithIndifferentAccess < Hash
  def to_yaml(opts = {})
    self.to_hash.to_yaml(opts)
  end
end