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devnacho / mountain_view

Living styleguide for Rails
MIT License
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autoload Deprecation Rails 6.1 #92

Open ChristineP2 opened 2 years ago

ChristineP2 commented 2 years ago

Hi! I'm back! I'll circle back on my other tickets I hope... sorry I disappeared.

Are you guys still maintaining this gem? I'm getting a deprecation warning:

DEPRECATION WARNING: Initialization autoloaded the constant MountainView::ComponentHelper.

Being able to do this is deprecated. Autoloading during initialization is going to be an error condition in future versions of Rails.

Reloading does not reboot the application, and therefore code executed during initialization does not run again. So, if you reload MountainView::ComponentHelper, for example, the expected changes won't be reflected in that stale Module object.

config.autoloader is set to classic. This autoloaded constant would have been unloaded if config.autoloader had been set to :zeitwerk.

In order to autoload safely at boot time, please wrap your code in a reloader callback this way:

Rails.application.reloader.to_prepare do
  # Autoload classes and modules needed at boot time here.
end

That block runs when the application boots, and every time there is a reload. For historical reasons, it may run twice, so it has to be idempotent.

Check the "Autoloading and Reloading Constants" guide to learn more about how Rails autoloads and reloads.