Environment configuration files in Ruby on Rails - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to load environment variables from the .env file using dotenv gem.

Ruby on Rails

require 'dotenv'\nDotenv.[1]

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Aread

Bload

Copen

Dfetch

Attempts:

3 left

💡 Hint

Common Mistakes

Using methods like read or open which do not load environment variables.

Forgetting to require the dotenv gem before calling its methods.

The Dotenv.load method loads environment variables from the .env file into the application environment.

2fill in blank

medium

Complete the code to access the Rails environment configuration for the current environment.

Ruby on Rails

Rails.application.config_for(:[1])

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Aenvironment

Bdatabase

Csecrets

Dcredentials

Attempts:

3 left

💡 Hint

Common Mistakes

Confusing environment with database or secrets configuration.

Using incorrect symbols that do not match config files.

The config_for(:environment) method loads configuration specific to the current Rails environment (like development, test, or production).

3fill in blank

hard

Fix the error in the code to correctly fetch a configuration value from credentials.

Ruby on Rails

Rails.application.credentials.[1]

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Afetch(:api_key)

Bread(:api_key)

Cget(:api_key)

Dapi_key

Attempts:

3 left

💡 Hint

Common Mistakes

Using fetch or get which are not valid methods on credentials.

Trying to read credentials like a hash instead of method calls.

Accessing credentials uses method calls like Rails.application.credentials.api_key without fetch or get methods.

4fill in blank

hard

Fill both blanks to define a custom configuration in config/application.rb and access it in the app.

Ruby on Rails

module MyApp\n  class Application < Rails::Application\n    config.[1] = 'value'\n  end\nend\n\nRails.application.config.[2]

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Acustom_setting

Bcustom_value

Dcustom_config

Attempts:

3 left

💡 Hint

Common Mistakes

Using different names for setting and accessing the config.

Trying to access config with incorrect method names.

You define a custom config key like config.custom_setting and access it the same way with Rails.application.config.custom_setting.

5fill in blank

hard

Fill all three blanks to create a YAML environment config file and load a value in Rails.

Ruby on Rails

development:\n  api_key: [1]\n\nconfig = Rails.application.config_for(:[2])\nputs config[:[3]]

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A'123abc'

Benvironment

Capi_key

D'secret'

Attempts:

3 left

💡 Hint

Common Mistakes

Using wrong file name in config_for.

Accessing config keys as strings instead of symbols.

Incorrect YAML syntax for the api_key value.

The YAML file defines api_key: '123abc' under development. Then config_for(:environment) loads it, and config[:api_key] accesses the key.