environment

Adds configuration code to a Rails runtime environment.

By default, adds code inside the Application class in config/application.rb so that it applies to all environments.

environment %(config.asset_host = "cdn.provider.com") 

Results in:

# config/application.rb class Application < Rails::Application config.asset_host = "cdn.provider.com" # ... end 

If the :env option is specified, the code will be added to the corresponding file in config/environments instead.

environment %(config.asset_host = "localhost:3000"), env: "development" 

Results in:

# config/environments/development.rb Rails.application.configure do config.asset_host = "localhost:3000" # ... end 

:env can also be an array. In which case, the code is added to each corresponding file in config/environments.

The code can also be specified as the return value of the block:

environment do %(config.asset_host = "cdn.provider.com") end environment(nil, env: "development") do %(config.asset_host = "localhost:3000") end