17 March 2010 · 1 min read

Defining Application Constants for Ruby on Rails Application

constants deployment development localhost production ruby on rails

The best place to keep application constants which are environment specific is in config/environments directory. For instance...

# in RAILS_ROOT/config/environments/development.rb
APP_DOMAIN = "localhost"
# in RAILS_ROOT/config/environments/production.rb
APP_DOMAIN = "real-domain.com"

...will set the APP_DOMAIN constant to either "localhost" or "real-domain.com" depending on which environment Rails boots up.

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