Ruby On Rails 面试题与答案

Question: What is the purpose of Environment.RB and Application.RB in Ruby on Rails?

There are two files where variables and configuration settings are stored. 

- config/environment.rb : Environment settings go here

- config/application.rb : Application level global settings go here

config.time_zone = 'Central Time (US & Canada)'
config.i18n.default_locale = :de
config.filter_parameters += [:password] # ensures that passwords are not logged

The same file is also used for configuring various environment settings such as:

config.action_mailer.smtp_settings # various email settings go here 

What is the purpose of config/environments/development.rb file?

You would specify various config settings the development environment in this file.

 config.action_controller.perform_caching = false # to enable caching

This is because you typically do not want to enable caching in the development environment. 

The same config setting in the production environment would be equal to true.