How to load a YAML config object

June 10, 2009

One of Rails’ selling points is convention over configuration, but most apps do need some configuration. database.yml is a great example.

Here’s some code that loads data into a ruby class from a YAML config file. Just like database.yml the configuration is specific to the rails environment you’re running in.


class MyClass
  def self.config_file
    File.join(RAILS_ROOT, 'config', 'my_class.yml')
  end 

  def self.config
    YAML.load(File.read(config_file)).with_indifferent_access[RAILS_ENV]
  end 

  def config
    self.class.config
  end 
end

Now you can do things like this in your instance and class methods:


def where_am_i
  config[:host]
end

The YAML file would look like this:


development:
  host: localhost
test:
  host: test.host
production:
  host: your_production_host.com

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