Rails3 - how to get at aws-s3's yml config data in the app?

Specifically, i have a file config/amazon_s3.yml which is used by the aws-s3 gem to set up some s3 config settings like secret keys etc. I also write some of this data into a var in ENV in a different file in initializers so i can reference them in calls to the "has_attached_file" method used by paperclip.

It would be smarter to get the file in initializers to read 开发者_Go百科them out of the s3 config yml, or some config settings for the classes used by the gem, eg something like AWS::S3::Base.connection.secret_access_key (this doesn't work).

Any ideas?

I found the answer here How to use YML values in a config/initalizer

First i load in the yaml in and stick it in a constant.

#config/initializers/constants.rb
S3_CONFIG = YAML.load_file("#{::Rails.root}/config/amazon_s3.yml")

Then, when i set up paperclip for a model, pull in these values, making sure i refer to the current environment:

class Entry < ActiveRecord::Base
  has_attached_file :media,
    :styles => { 
      :medium => "300x300>", 
      :thumb => "110x110>" 
    },
    :storage => :s3,
    :bucket =>S3_CONFIG[::Rails.env]["bucket"],
    :s3_credentials => {
      :access_key_id => S3_CONFIG[::Rails.env]["access_key_id"],
      :secret_access_key => S3_CONFIG[::Rails.env]["secret_access_key"]
    }        
end