how to access a YML Value

Question

I have the following yml

/config/s3.yml

common: &common
    access_key_id: asddasadsadsad
    secret_access_key: adsasddasdasdsa+qlSn+dadadada

development:
    <<: *common
    bucket: XX_dev

test:
    <<: *common
    bucket: XX_test

production:
    <<: *common
    bucket: XX_prod


  has_attached_file :photo,
    :styles => { :thumb => "70x70>" },
    :storage => :s3,
    :s3_credentials => "#{RAILS_ROOT}/config/s3.yml",
    :path => "/assets/users/:id/:style/:basename.:extension",
    :bucket => "????How to get this from the YML based on the ENV???",

And I want to use this in paperclip, how can I access the bucket? Thanks

Answer 1

Create a file in your initializers and put this inside:

raw_config = File.read("#{Rails.root}/config/s3.yml")
APP_CONFIG = YAML.load(raw_config)

Then in your app, you'll access it's values this way:

APP_CONFIG[Rails.env]["bucket"]

Answer 2

You don't need to pass a :bucket parameter, Paperclip will already know to use the bucket: key for the current environment from your s3.yml file.

Also note that if you manually compiled Ruby 1.9.2 via RVM, there is a chance that you are falling victim to a bug in the new Psych YAML engine. It doesn't like "DRY" yaml files (yet -- it's been filed as a bug and should be fixed in the next official release of Ruby). What happens is that each item that inherits from common, only contains those inherited items (your access key and secret id), and doesn't actually include the additional stuff you add (in your case, your bucket name).

Try making a traditional yml file instead without the common section (i.e. repeat the access key and secret id for each environment). More info: Error when loading YAML config files in Rails

UPDATE

The newest release of Ruby that came out today (1.9.2-p290) includes a fix for this issue.