Rails
Rails 6.1 supports `if_not_exists` option for adding index
Rails 6.1 added support for if_not_exists option to add_index. The if_not_exists provided to create_table also gets propagated to all indexes getting created in the create_table block.
Using Interactors in Rails
Interactors provide a common interface for performing complex user interactions.
Ways for reducing Heroku slug size
Techniques for reducing Heroku slug size for Rails applicationsRails adds support for descending order in find_each, find_in_batches and in_batches
Rails 6.1 has added support for providing order(ASC/DESC) to batch processing methods like find_each, find_in_batches and in_batches instead of processing records in ascending order always.Rails - Added sub seconds to Time inspect
Rails has added sub seconds to ActiveSupport::TimeWithZone#inspect method.Rails adds support for db:rollback:name for multiple database applications
Rails has added support for name option while rollbacking migration for multiple database applicationRails 6.1 add Enumerable#pick to complement Relation#pick
Adding pick to enumerable will enable us to call pick on loaded relations, unloaded relations, and plain enumerables interchangeably.Using Optimizer Hints in Rails
Optimizer Hints allows us to control the query optimizer of a database system. Rails 6 has added support to provide Optimizer Hints.
Rails 6.1 adds ActionCable::Channel#stream_or_reject_for
Rails 6.1 adds `ActionCable::Channel#stream_or_reject_for` to stream or reject connection based on presence of recordHeredocs and how to use them in Ruby and Rails
What are heredoc and different ways to use them in Ruby and Rails.