rails--rails/activerecord/CHANGELOG.md

• Loading model schema from database is now thread-safe.

  Fixes #28589.

  Vikrant Chaudhary, David Abdemoulaie

• Add ActiveRecord::Base#cache_version to support recyclable cache keys via the new versioned entries in ActiveSupport::Cache. This also means that ActiveRecord::Base#cache_key will now return a stable key that does not include a timestamp any more.

  NOTE: This feature is turned off by default, and #cache_key will still return cache keys with timestamps until you set ActiveRecord::Base.cache_versioning = true. That's the setting for all new apps on Rails 5.2+

  DHH

• Respect SchemaDumper.ignore_tables in rake tasks for databases structure dump

  Rusty Geldmacher, Guillermo Iguaran

• Add type caster to RuntimeReflection#alias_name

  Fixes #28959.

  Jon Moss

• Deprecate supports_statement_cache?.

  Ryuta Kamizono

• Quote database name in db:create grant statement (when database user does not have access to create the database).

  Rune Philosof

• Raise error UnknownMigrationVersionError on the movement of migrations when the current migration does not exist.

  bogdanvlviv

• Fix bin/rails db:forward first migration.

  bogdanvlviv

• Support Descending Indexes for MySQL.

  MySQL 8.0.1 and higher supports descending indexes: DESC in an index definition is no longer ignored. See https://dev.mysql.com/doc/refman/8.0/en/descending-indexes.html.

  Ryuta Kamizono

• Fix inconsistency with changed attributes when overriding AR attribute reader.

  bogdanvlviv

• When calling the dynamic fixture accessor method with no arguments it now returns all fixtures of this type. Previously this method always returned an empty array.

  Kevin McPhillips

Please check 5-1-stable for previous changes.