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dynamic_custom_config_x

⚙️ Dynamic Namespaced Settings via config.x and Reloaders​

For settings you change frequently in development, hook into Rails’ reloader to pick up updated values without restarting the server. By combining config.x and to_prepare hooks, you get live‑reloading custom config stored in YAML or elsewhere.

  1. Create config/custom_settings.yml:
# config/custom_settings.yml
development:
  feature_flag: true
  welcome_message: "Hello, Dev!"
production:
  feature_flag: false
  welcome_message: "Welcome!"
  1. In an initializer, load and reload on each request in development:
# config/initializers/custom_settings.rb
Rails.application.config.to_prepare do
  raw = Rails.root.join("config/custom_settings.yml").read
  all = YAML.safe_load(ERB.new(raw).result) || {}
  Rails.application.config.x.custom = all.fetch(Rails.env, {})
end
  1. Use it anywhere:
if Rails.configuration.x.custom["feature_flag"]
  puts Rails.configuration.x.custom["welcome_message"]
end