~~僕が考えたさいきょうの~~Railsの独自config/*.yml 読み込み処理

ガイド読むの大事。
https://guides.rubyonrails.org/v4.2/configuring.html#custom-configuration

config/hoge.yml

default: &default
  message: "hoge"

development:
  <<: *default

production:
  <<: *default
  message: "foo"

config/application.rb

module XXXX
  class Application < Rails::Application
    ...
    config.x.hoge = ActiveSupport::InheritableOptions.new(config_for(:hoge))
    ...
  end
end

# bin/rails console development
Rails.application.config.x.hoge.message
# => "hoge"

# bin/rails console production
Rails.application.config.x.hoge.message
# => "foo"

以下、車輪の再発明　(はずかしい！)

initializersに定義しといて

config/initializers/load_config.rb

def load_config(key, filepath)
  yml = YAML.load_file filepath rescue nil
  abort "No such file #{filepath}" unless yml

  config = yml[Rails.env]
  abort "No such environment #{Rails.env} on #{filepath}" unless config

  Rails.application.config.send(
    "#{key}=".to_sym,
    ActiveSupport::InheritableOptions.new(config.deep_symbolize_keys)
    )
end

load_config :hogeconf, Rails.root.join('config', 'hoge.yml')

ファイル置いて

config/hoge.yml

default: &default
  message: "hoge"

development:
  <<: *default

production:
  <<: *default
  message: "foo"

実際に使う

# bin/rails console development
Rails.application.config.hogeconf.message
# => "hoge"

# bin/rails console production
Rails.application.config.hogeconf.message
# => "foo"

本当にさいきょうかは知らない