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-* Fix `bin/rails db:migrate` with specified `VERSION`.
- `bin/rails db:migrate` with empty VERSION behaves as without `VERSION`.
- Check a format of `VERSION`: Allow a migration version number
- or name of a migration file. Raise error if format of `VERSION` is invalid.
- Raise error if target migration doesn't exist.
- *bogdanvlviv*
-* Fixed a bug where column orders for an index weren't written to
- db/schema.rb when using the sqlite adapter.
-
- Fixes #30902.
-
- *Paul Kuruvilla*
-
-* Remove deprecated method `#sanitize_conditions`.
-
- *Rafael Mendonça França*
-
-* Remove deprecated method `#scope_chain`.
-
- *Rafael Mendonça França*
-
-* Remove deprecated configuration `.error_on_ignored_order_or_limit`.
-
- *Rafael Mendonça França*
-
-* Remove deprecated arguments from `#verify!`.
-
- *Rafael Mendonça França*
-
-* Remove deprecated argument `name` from `#indexes`.
-
- *Rafael Mendonça França*
-
-* Remove deprecated method `ActiveRecord::Migrator.schema_migrations_table_name`.
-
- *Rafael Mendonça França*
-
-* Remove deprecated method `supports_primary_key?`.
-
- *Rafael Mendonça França*
-
-* Remove deprecated method `supports_migrations?`.
-
- *Rafael Mendonça França*
-
-* Remove deprecated methods `initialize_schema_migrations_table` and `initialize_internal_metadata_table`.
-
- *Rafael Mendonça França*
-
-* Raises when calling `lock!` in a dirty record.
-
- *Rafael Mendonça França*
-
-* Remove deprecated support to passing a class to `:class_name` on associations.
-
- *Rafael Mendonça França*
-
-* Remove deprecated argument `default` from `index_name_exists?`.
-
- *Rafael Mendonça França*
-
-* Remove deprecated support to `quoted_id` when typecasting an Active Record object.
-
- *Rafael Mendonça França*
-
-* Fix `bin/rails db:setup` and `bin/rails db:test:prepare` create wrong
- ar_internal_metadata's data for a test database.
-
- Before:
- ```
- $ RAILS_ENV=test rails dbconsole
- > SELECT * FROM ar_internal_metadata;
- key|value|created_at|updated_at
- environment|development|2017-09-11 23:14:10.815679|2017-09-11 23:14:10.815679
- ```
-
- After:
- ```
- $ RAILS_ENV=test rails dbconsole
- > SELECT * FROM ar_internal_metadata;
- key|value|created_at|updated_at
- environment|test|2017-09-11 23:14:10.815679|2017-09-11 23:14:10.815679
- ```
-
- Fixes #26731.
-
- *bogdanvlviv*
-
-* Fix longer sequence name detection for serial columns.
-
- Fixes #28332.
-
- *Ryuta Kamizono*
-
-* MySQL: Don't lose `auto_increment: true` in the `db/schema.rb`.
-
- Fixes #30894.
-
- *Ryuta Kamizono*
-
-* Fix `COUNT(DISTINCT ...)` for `GROUP BY` with `ORDER BY` and `LIMIT`.
-
- Fixes #30886.
-
- *Ryuta Kamizono*
-
-* PostgreSQL `tsrange` now preserves subsecond precision.
-
- PostgreSQL 9.1+ introduced range types, and Rails added support for using
- this datatype in Active Record. However, the serialization of
- `PostgreSQL::OID::Range` was incomplete, because it did not properly
- cast the bounds that make up the range. This led to subseconds being
- dropped in SQL commands:
-
- Before:
-
- connection.type_cast(tsrange.serialize(range_value))
- # => "[2010-01-01 13:30:00 UTC,2011-02-02 19:30:00 UTC)"
-
- Now:
-
- connection.type_cast(tsrange.serialize(range_value))
- # => "[2010-01-01 13:30:00.670277,2011-02-02 19:30:00.745125)"
-
- *Thomas Cannon*
-
-* Passing a `Set` to `Relation#where` now behaves the same as passing an
- array.
-
- *Sean Griffin*
-
-* Use given algorithm while removing index from database.
-
- Fixes #24190.
-
- *Mehmet Emin İNAÇ*
-
-* Update payload names for `sql.active_record` instrumentation to be
- more descriptive.
-
- Fixes #30586.
-
- *Jeremy Green*
-
-* Add new error class `TransactionTimeout` which will be raised
- when lock wait timeout exceeded.
-
- *Gabriel Courtemanche*
-
-* Remove deprecated `#migration_keys`.
-
- *Ryuta Kamizono*
-
-* Automatically guess the inverse associations for STI.
-
- *Yuichiro Kaneko*
-
-* Ensure `sum` honors `distinct` on `has_many :through` associations
-
- Fixes #16791.
-
- *Aaron Wortham*
-
-* Add `binary` fixture helper method.
-
- *Atsushi Yoshida*
-
-* When using `Relation#or`, extract the common conditions and put them before the OR condition.
-
- *Maxime Handfield Lapointe*
-
-* `Relation#or` now accepts two relations who have different values for
- `references` only, as `references` can be implicitly called by `where`.
-
- Fixes #29411.
-
- *Sean Griffin*
-
-* `ApplicationRecord` is no longer generated when generating models. If you
- need to generate it, it can be created with `rails g application_record`.
-
- *Lisa Ugray*
-
-* Fix `COUNT(DISTINCT ...)` with `ORDER BY` and `LIMIT` to keep the existing select list.
-
- *Ryuta Kamizono*
-
-* When a `has_one` association is destroyed by `dependent: destroy`,
- `destroyed_by_association` will now be set to the reflection, matching the
- behaviour of `has_many` associations.
-
- *Lisa Ugray*
-
-* Fix `unscoped(where: [columns])` removing the wrong bind values
-
- When the `where` is called on a relation after a `or`, unscoping the column of that later `where` removed
- bind values used by the `or` instead. (possibly other cases too)
-
- ```
- Post.where(id: 1).or(Post.where(id: 2)).where(foo: 3).unscope(where: :foo).to_sql
- # Currently:
- # SELECT "posts".* FROM "posts" WHERE ("posts"."id" = 2 OR "posts"."id" = 3)
- # With fix:
- # SELECT "posts".* FROM "posts" WHERE ("posts"."id" = 1 OR "posts"."id" = 2)
- ```
-
- *Maxime Handfield Lapointe*
-
-* Values constructed using multi-parameter assignment will now use the
- post-type-cast value for rendering in single-field form inputs.
-
- *Sean Griffin*
-
-* `Relation#joins` is no longer affected by the target model's
- `current_scope`, with the exception of `unscoped`.
-
- Fixes #29338.
-
- *Sean Griffin*
-
-* Change sqlite3 boolean serialization to use 1 and 0
-
- SQLite natively recognizes 1 and 0 as true and false, but does not natively
- recognize 't' and 'f' as was previously serialized.
-
- This change in serialization requires a migration of stored boolean data
- for SQLite databases, so it's implemented behind a configuration flag
- whose default false value is deprecated.
-
- *Lisa Ugray*
-
-* Skip query caching when working with batches of records (`find_each`, `find_in_batches`,
- `in_batches`).
-
- Previously, records would be fetched in batches, but all records would be retained in memory
- until the end of the request or job.
-
- *Eugene Kenny*
-
-* Prevent errors raised by `sql.active_record` notification subscribers from being converted into
- `ActiveRecord::StatementInvalid` exceptions.
-
- *Dennis Taylor*
-
-* Fix eager loading/preloading association with scope including joins.
-
- Fixes #28324.
-
- *Ryuta Kamizono*
-
-* Fix transactions to apply state to child transactions
-
- Previously, if you had a nested transaction and the outer transaction was rolledback, the record from the
- inner transaction would still be marked as persisted.
-
- This change fixes that by applying the state of the parent transaction to the child transaction when the
- parent transaction is rolledback. This will correctly mark records from the inner transaction as not persisted.
-
- *Eileen M. Uchitelle*, *Aaron Patterson*
-
-* Deprecate `set_state` method in `TransactionState`
-
- Deprecated the `set_state` method in favor of setting the state via specific methods. If you need to mark the
- state of the transaction you can now use `rollback!`, `commit!` or `nullify!` instead of
- `set_state(:rolledback)`, `set_state(:committed)`, or `set_state(nil)`.
-
- *Eileen M. Uchitelle*, *Aaron Patterson*
-
-* Deprecate delegating to `arel` in `Relation`.
-
- *Ryuta Kamizono*
-
-* Fix eager loading to respect `store_full_sti_class` setting.
-
- *Ryuta Kamizono*
-
-* Query cache was unavailable when entering the `ActiveRecord::Base.cache` block
- without being connected.
-
- *Tsukasa Oishi*
-
-* Previously, when building records using a `has_many :through` association,
- if the child records were deleted before the parent was saved, they would
- still be persisted. Now, if child records are deleted before the parent is saved
- on a `has_many :through` association, the child records will not be persisted.
-
- *Tobias Kraze*
-
-* Merging two relations representing nested joins no longer transforms the joins of
- the merged relation into LEFT OUTER JOIN. Example to clarify:
-
- ```
- Author.joins(:posts).merge(Post.joins(:comments))
- # Before the change:
- #=> SELECT ... FROM authors INNER JOIN posts ON ... LEFT OUTER JOIN comments ON...
-
- # After the change:
- #=> SELECT ... FROM authors INNER JOIN posts ON ... INNER JOIN comments ON...
- ```
-
- TODO: Add to the Rails 5.2 upgrade guide
-
- *Maxime Handfield Lapointe*
-
-* `ActiveRecord::Persistence#touch` does not work well when optimistic locking enabled and
- `locking_column`, without default value, is null in the database.
-
- *bogdanvlviv*
-
-* Fix destroying existing object does not work well when optimistic locking enabled and
- `locking_column` is null in the database.
-
- *bogdanvlviv*
-
-* Use bulk INSERT to insert fixtures for better performance.
-
- *Kir Shatrov*
-
-* Prevent creation of bind param if casted value is nil.
-
- *Ryuta Kamizono*
-
-* Deprecate passing arguments and block at the same time to `count` and `sum` in `ActiveRecord::Calculations`.
-
- *Ryuta Kamizono*
-
-* 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*
-
-* 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](https://github.com/rails/rails/blob/5-1-stable/activerecord/CHANGELOG.md) for previous changes.
+Please check [5-2-stable](https://github.com/rails/rails/blob/5-2-stable/activerecord/CHANGELOG.md) for previous changes.