What is the best way to store application configuration on rails?

Question

I need to save the application configuration in rails. But it should be:

• available in any file (model, view, helpers and controllers
• the specified environment (or not), which means that each environment can overwrite the configurations specified in environment.rb

I tried using environment.rb and put something like

USE_USER_APP = true 

which worked for me, but when you try to overwrite it in a certain environment, it will not work, because production.rb, for example, is inside the Rails: Initializer.run block.

So, anyone?

Answer 1

I helped a friend set up the solution mentioned by Ricardo yesterday. We hacked it a bit by downloading a YAML file with something similar to this (from memory here):

 require 'ostruct' require 'yaml' require 'erb' #config = OpenStruct.new(YAML.load_file("#{RAILS_ROOT}/config/config.yml")) config = OpenStruct.new(YAML.load(ERB.new(File.read("#{RAILS_ROOT}/config/config.yml")).result)) env_config = config.send(RAILS_ENV) config.common.update(env_config) unless env_config.nil? ::AppConfig = OpenStruct.new(config.common) 

This allowed him to embed Ruby code in config, as in Rhtml:

 development: path_to_something: <%= RAILS_ROOT %>/config/something.yml 

Answer 2

Take a look at Configatron: http://github.com/markbates/configatron/tree/master

I still need to use it, but it is actively developing it now and it looks good.

Answer 3

The most basic thing to do is set the class variable from environment.rb. I did this for Google Analytics. Essentially, I need another key, depending on which environment I'm in such a development or stage without distorting the metrics.

Here is how I did it.

In lib/analytics/google_analytics.rb :

 module Analytics class GoogleAnalytics @@account_id = nil cattr_accessor :account_id end end 

And then in environment.rb or in environments/production.rb or in any other environment file:

 Analytics::GoogleAnalytics.account_id = "xxxxxxxxx" 

Then, wherever you reference, say, the default layout with the Google Analytics JavaScript, you simply call Analytics::GoogleAnalytics.account_id .

Answer 4

I found a good way here

Answer 5

Use environment variables. Heroku uses this. Remember that if you save the configuration in the code base, anyone with access to the code has access to any secret configuration (aws-api keys, api server keys, etc.).

daemontool envdir is a good configuration tool, I'm sure that what Heroku uses to provide its environment variables to applications.

Answer 6

I used Rails Settings Cached .

It is very easy to use, saves cached configuration values ​​and allows you to dynamically change them.