It does not belong to the autoload paths by default, but it does belong to $LOAD_PATH. For instance, lib is an idiomatic choice. The easiest way to refer to those classes or modules during boot is to have them defined in a directory which does not belong to the autoload paths. Changes in Turbo::Broadcastable would have no effect if reloaded, the ancestor chain would still have the original one.Ĭorollary: Those classes or modules cannot be reloadable. That adds a module object to the ancestor chain of ActiveRecord::Base. on_load ( :active_record ) do include Turbo :: Broadcastable end end Copy Initializer "turbo.broadcastable" do ActiveSupport. Let's imagine ApiGateway is a reloadable class from app/services managed by the main autoloader and you need to configure its endpoint while the application boots: 7.1 Use case 1: During boot, load reloadable code 7.1.1 Autoload on boot and on each reload If you reboot the server, they run again in a new process, but reloading does not reboot the server, and initializers don't run again. Why? Initializers only run once, when the application boots. This applies to code in config/initializers as well as application or engines initializers. However, you cannot autoload from the autoload paths, which are managed by the main autoloader. Please check the section toload_once_paths above. While booting, applications can autoload from the autoload once paths, which are managed by the once autoloader. If User is reloaded, since VipUser is not, the superclass of VipUser is the original stale class object.īottom line: do not cache reloadable classes or modules. # lib/vip_user.rb class VipUser < User end Copy However, you can force a reload in the console by executing reload!: Similar to an individual request, you generally want a console session to be served by a consistent, non-changing set of application classes and modules. This is because, normally, it would be confusing to have code reloaded in the middle of a console session. In a Rails console there is no file watcher active regardless of the value of config.cache_classes. This is controlled by the config.file_watcher setting. It can be configured instead to detect file changes by walking the autoload paths. Rails uses an evented file monitor to detect files changes by default. The setting that controls this behavior is config.cache_classes, which is false by default in development mode (reloading enabled), and true by default in production mode (reloading disabled). That way, application classes or modules used during that request will be autoloaded again, thus picking up their current implementation in the file system. More precisely, if the web server is running and application files have been modified, Rails unloads all autoloaded constants managed by the main autoloader just before the next request is processed. Rails automatically reloads classes and modules if application files in the autoload paths change. Also, if your application uses Bootsnap, that saves the library from building unnecessary indexes, leading to lower memory usage. That may speed up legitimate require calls a bit since there are fewer lookups. add_autoload_paths_to_load_path = false Copy
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