Rails Configuration #autoload_once_paths attribute autoload_once_paths Ruby on Rails 2.3.18 Since v2.3.18 Last seen in v2.3.18 An array of paths from which Rails will automatically load from only once. All elements of this array must also be in autoload_paths. On this page Support Bug Reports can be filed for the Ruby on Rails project on GitHub. Feature requests should be discussed on the rubyonrails-core forum. License Released under the MIT license.