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Add code loading best practices
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Bart de Water authored and bdewater committed Sep 5, 2022
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If your projects depends on various external processes use https://github.com/ddollar/foreman[foreman] to manage them.

== Code loading [[code-loading]]

=== Lazy load hooks

Use https://api.rubyonrails.org/classes/ActiveSupport/LazyLoadHooks.html[lazy load hooks] to patch Rails core classes, so they are not forcibly loaded early.

[source,ruby]
----
# bad
ActiveRecord::Base.include(MyClass)
# good
ActiveSupport.on_load(:active_record) { include MyClass }
----

=== Zeitwerk check in CI

Run `bin/rails zeitwerk:check` in your CI to ensure all application code is eager loaded correctly like in production.

== Further Reading

There are a few excellent resources on Rails style, that you should consider if you have time to spare:
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