Eager loading Active Storage models to avoid N+1 issues

Removing N+1 queries when we access the Active Storage attachments associated with an ActiveRecord model.

Rails adds jitter to ActiveJob::Exceptions.retry_on

Rails adds jitter to ActiveJob::Exceptions.retry_on to cater to thundering herd effect

Ruby Hash#transform_keys now accepts a hash that maps existing keys to new keys

Ruby Hash#transform_keys now also accepts a hash that maps the existing hash keys to new keys

Rails has added strict loading mode to prevent lazy loading

Rails has added strict loading mode to prevent lazy loading of associations and help avoid N + 1 queries

Rails adds config rake_eager_load

Rails has added the option to eager load all the registered name spaces in rake tasks.

Rails has added support for automatic database connection switching from primary to the replica

Rails has added support for automatic database connection switching from primary to the replica

Ruby 2.7 removes taint checking mechanism

Ruby 2.7 access and setting of $SAFE is now always warned. $SAFE will become a normal global variable in Ruby 3.0

Rails 6.1 adds at option to perform_enqueued_jobs test helper

Rails 6.1 has added at option to perform_enqueued_jobs test helper to run only jobs which are scheduled at or before the passed in time

Rails adds ActiveRecord API for switching multiple database connections

Rails adds ActiveRecord API connects_to and connected_to for switching connections to support multiple databases.

Rails introduces disallowed deprecations in ActiveSupport

Rails has added support to configure disallowed deprecations.