Heredocs and how to use them in Ruby and RailsWhat are heredoc and different ways to use them in Ruby and Rails.
Rails has deprecated using return, break and throw to exit a transactionRails has disallowed using return, break and throw for exiting early from a transaction and having it committed.
Rails ActiveRecord::Relation#pick now uses already loaded resultsRails ActiveRecord::Relation#pick now uses already loaded results instead of making a new query everytime.
Rails [attribute_name]_previously_changed? accepts :from and :to argumentsRails Active Model Dirty method [attribute_name]_previously_changed? now accepts :from and :to arguments just like [attribute_name]_changed?
Rails - Allows to specify schema cache path in database configuration fileRails now exposes a new configuration for specifying the location of the schema cache file. This can be done in database.yml using schema_cache_path key.
Rails has added support in Action Cable to unsubscribe from specific streamRails adds ActionCable::Channel#stop_stream_from and ActionCable::Channel#stop_stream_for methods to allow user to unsubscribe from specific stream
Rails adds round_mode parameter support to number helpersRails has added :round_mode parameter support to number helpers
Ruby 2.7 - Setting $ special variables to non-nil value is now warnedIn Ruby 2.7, setting special variable $, $; $/ $\ to non-nil values will now show a deprecated warning
Eager loading Active Storage models to avoid N+1 issuesRemoving N+1 queries when we access the Active Storage attachments associated with an ActiveRecord model.
Rails adds jitter to ActiveJob::Exceptions.retry_onRails adds jitter to ActiveJob::Exceptions.retry_on to cater to thundering herd effect