Rails
Rails has added a benchmark generator
Rails has added a benchmark generator for scripts to benchmark Rails application.Rails if_exists/if_not_exists Migrations
Rails adds support for if_exists/if_not_exists on remove_column/add_column in migrations to silently ignore migrationsRails 6 adds rails db:system:change command
Rails 6 adds rails db:system:change command to allow switching database configurationRails 6 ActiveSupport Unicode Deprecations
Rails 6 has deprecated methods in Unicode and Chars support for ActiveSupport in favor of using ruby 2.3+ String methods directly.Rails 6.1 Adds Multiple Storage Services
Rails 6.1 adds support to configure storage services for individual attachment.Rails Adds Relation#annotate for SQL Comments
Rails adds ActiveRecord::Relation#annotate for adding SQL comments to ActiveRecord::Relation queriesRails 6.1 where.missing to Find Orphan Records
Rails 6.1 adds where.missing query method to easily find records with missing associations.Webpacker is the new default in Rails 6
Webpacker is the new default JavaScript compiler instead of Sprockets in Rails 6Fixing N+1 Queries in Active Record
Overcome N+1 issues in Active Record using includes, preload, eager_load, pluck, select, and exists? methods.Rails 6 Adds Ability to Block Database Writes
Rails 6 adds the ability to block writes to a database even if the database user is able to write using connection.while_preventing_writes