Rails-7

ActiveRecord::Calculations will now use column-based type casting

Rails 7 now harmonizes results of ActiveRecord::Calculations.average by applying column-based typecasting. Now, floating-point number columns will be aggregated as Float.

Rails 7 allows setting cache expiry, as an absolute timestamp

With the introduction of expires_at to Rails Cache it is now possible to set absolute timestamps for cache expiry.

Rails 7 adds change tracking methods for belongs_to associations

Rails 7 adds the ability to track if an association has been pointed to a new target record in the previous save and whether it will point to a new target record in the next save.

Rails 7 allows loading nested locales in the engine

Rails 7 allows loading nested locales inside the `/locales` directory by default for better organization in larger apps.

Rails 7 adds support for `if_exists/if_not_exists` on `remove_foreign_key/add_foreign_key`

Rails 7 adds support for `if_exists/if_not_exists` on `remove_foreign_key/add_foreign_key` in migrations to silently ignore raised exceptions.

Rails 7 MySQL adapter improves the security of untyped bound values

MySQL adapter in Rails 7 casts numbers and booleans to string to avoid security vulnerabilities.

Rails 7 adds previously_persisted? method to ActiveRecord

Rails 7 adds previously_persisted? method to check an object previously existed in the database and presently deleted.

Rails 7 adds AudioAnalyzer to ActiveStorage

Rails 7 adds AudioAnalyzer to ActiveStorage to extract audio duration and bit_rate.

Rails 7 generators will raise errors if an attribute type is invalid

Rails 7 generators will validate the type by checking if it is of a default migration type and will raise an error if it is invalid.

Rails 7 allows passing raw SQL as `on_duplicate` value to `#upsert_all`

Rails 7 allow passing raw SQL statements to `on_duplicate` and `returning` option as value to ActiveRecord `#upsert_all` method.