Creating Long-Lived Web Apps with Ruby on Rails/

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Using the Environment for Runtime Configuration

Using the Environment for Runtime Configuration

Learn about the concept of runtime configuration environment.

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The runtime configuration is information Rails cannot properly determine on its own, but that is critical for our app to be able to start up and run. This information also tends to be different in development, testing, and production. Database credentials are a great example.

Rails provides three mechanisms that all work together to manage runtime configuration:

  • The UNIX environment

  • The config/database.yml

  • An encrypted YAML ...