How to create your own global settings in Rails

load_config.rb

# directory: config/initializers/

# only loads the values of the current environment
GLOBAL_VAR = YAML.load_file("#{Rails.root}/config/settings.yml")[Rails.env]

my_controller.rb

# directory: app/controllers/

# usage in your controllers (or wherever you like)
puts GLOBAL_VAR['myKey1']

settings.yml

# directory: config/

# settings for every environment
development:
    myKey1: Value1
    myKey2: Value2
    
test:
    myKey1: Value1
    myKey2: Value2
    
production:
    myKey1: Value1
    myKey2: Value2