Hello! Emmanuel Hayford here.

The third edition of Rails World is a couple of months away! In case you missed it, The Rails Foundation has already announced an exciting lineup that you should check out in case you haven’t seen it yet.

Document through with polymorphic A new addition to the Rails documentation clarifies that polymorphic associations are not supported as :through associations. While Active Record already raises an error when such a setup is attempted, the exceptions were previously undocumented. This update makes the restriction explicit in the docs.

Deprecate :class_name for polymorphic belongs_to Passing :class_name to a polymorphic belongs_to is now deprecated and will be removed in Rails 8.1. Since the associated class is already determined by the type column, the option is unnecessary. If you’re using :class_name in this context, you can safely delete it.

Add namespaced version of the db:migrate:reset command. Rails now supports a namespaced version of db:migrate:reset, allowing you to reset only the primary database using db:migrate:reset:primary.

Respect SCHEMA_FORMAT in db:schema:load A fix has been applied to ensure the SCHEMA_FORMAT environment variable behaves as described in the task description. This correction only applies to Rails 7.2 and addresses an oversight from its initial introduction.

You can view the whole list of changes here. We had 17 contributors to the Rails codebase this past week!

Until next time!

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