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229 lines
7.3 KiB
Markdown
229 lines
7.3 KiB
Markdown
* Ensure `sum` honors `distinct` on `has_many :through` associations
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Fixes #16791.
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*Aaron Wortham*
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* Add `binary` fixture helper method.
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*Atsushi Yoshida*
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* When using `Relation#or`, extract the common conditions and put them before the OR condition.
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*Maxime Handfield Lapointe*
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* `Relation#or` now accepts two relations who have different values for
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`references` only, as `references` can be implicitly called by `where`.
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Fixes #29411.
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*Sean Griffin*
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* `ApplicationRecord` is no longer generated when generating models. If you
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need to generate it, it can be created with `rails g application_record`.
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*Lisa Ugray*
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* Fix `COUNT(DISTINCT ...)` with `ORDER BY` and `LIMIT` to keep the existing select list.
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*Ryuta Kamizono*
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* When a `has_one` association is destroyed by `dependent: destroy`,
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`destroyed_by_association` will now be set to the reflection, matching the
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behaviour of `has_many` associations.
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*Lisa Ugray*
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* Fix `unscoped(where: [columns])` removing the wrong bind values
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When the `where` is called on a relation after a `or`, unscoping the column of that later `where` removed
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bind values used by the `or` instead. (possibly other cases too)
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```
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Post.where(id: 1).or(Post.where(id: 2)).where(foo: 3).unscope(where: :foo).to_sql
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# Currently:
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# SELECT "posts".* FROM "posts" WHERE ("posts"."id" = 2 OR "posts"."id" = 3)
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# With fix:
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# SELECT "posts".* FROM "posts" WHERE ("posts"."id" = 1 OR "posts"."id" = 2)
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```
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*Maxime Handfield Lapointe*
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* Values constructed using multi-parameter assignment will now use the
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post-type-cast value for rendering in single-field form inputs.
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*Sean Griffin*
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* `Relation#joins` is no longer affected by the target model's
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`current_scope`, with the exception of `unscoped`.
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Fixes #29338.
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*Sean Griffin*
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* Change sqlite3 boolean serialization to use 1 and 0
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SQLite natively recognizes 1 and 0 as true and false, but does not natively
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recognize 't' and 'f' as was previously serialized.
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This change in serialization requires a migration of stored boolean data
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for SQLite databases, so it's implemented behind a configuration flag
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whose default false value is deprecated.
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*Lisa Ugray*
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* Skip query caching when working with batches of records (`find_each`, `find_in_batches`,
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`in_batches`).
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Previously, records would be fetched in batches, but all records would be retained in memory
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until the end of the request or job.
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*Eugene Kenny*
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* Prevent errors raised by `sql.active_record` notification subscribers from being converted into
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`ActiveRecord::StatementInvalid` exceptions.
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*Dennis Taylor*
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* Fix eager loading/preloading association with scope including joins.
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Fixes #28324.
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*Ryuta Kamizono*
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* Fix transactions to apply state to child transactions
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Previously, if you had a nested transaction and the outer transaction was rolledback, the record from the
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inner transaction would still be marked as persisted.
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This change fixes that by applying the state of the parent transaction to the child transaction when the
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parent transaction is rolledback. This will correctly mark records from the inner transaction as not persisted.
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*Eileen M. Uchitelle*, *Aaron Patterson*
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* Deprecate `set_state` method in `TransactionState`
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Deprecated the `set_state` method in favor of setting the state via specific methods. If you need to mark the
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state of the transaction you can now use `rollback!`, `commit!` or `nullify!` instead of
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`set_state(:rolledback)`, `set_state(:committed)`, or `set_state(nil)`.
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*Eileen M. Uchitelle*, *Aaron Patterson*
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* Deprecate delegating to `arel` in `Relation`.
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*Ryuta Kamizono*
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* Fix eager loading to respect `store_full_sti_class` setting.
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*Ryuta Kamizono*
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* Query cache was unavailable when entering the `ActiveRecord::Base.cache` block
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without being connected.
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*Tsukasa Oishi*
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* Previously, when building records using a `has_many :through` association,
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if the child records were deleted before the parent was saved, they would
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still be persisted. Now, if child records are deleted before the parent is saved
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on a `has_many :through` association, the child records will not be persisted.
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*Tobias Kraze*
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* Merging two relations representing nested joins no longer transforms the joins of
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the merged relation into LEFT OUTER JOIN. Example to clarify:
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```
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Author.joins(:posts).merge(Post.joins(:comments))
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# Before the change:
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#=> SELECT ... FROM authors INNER JOIN posts ON ... LEFT OUTER JOIN comments ON...
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# After the change:
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#=> SELECT ... FROM authors INNER JOIN posts ON ... INNER JOIN comments ON...
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```
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TODO: Add to the Rails 5.2 upgrade guide
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*Maxime Handfield Lapointe*
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* `ActiveRecord::Persistence#touch` does not work well when optimistic locking enabled and
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`locking_column`, without default value, is null in the database.
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*bogdanvlviv*
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* Fix destroying existing object does not work well when optimistic locking enabled and
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`locking_column` is null in the database.
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*bogdanvlviv*
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* Use bulk INSERT to insert fixtures for better performance.
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*Kir Shatrov*
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* Prevent creation of bind param if casted value is nil.
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*Ryuta Kamizono*
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* Deprecate passing arguments and block at the same time to `count` and `sum` in `ActiveRecord::Calculations`.
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*Ryuta Kamizono*
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* Loading model schema from database is now thread-safe.
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Fixes #28589.
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*Vikrant Chaudhary*, *David Abdemoulaie*
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* Add `ActiveRecord::Base#cache_version` to support recyclable cache keys via the new versioned entries
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in `ActiveSupport::Cache`. This also means that `ActiveRecord::Base#cache_key` will now return a stable key
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that does not include a timestamp any more.
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NOTE: This feature is turned off by default, and `#cache_key` will still return cache keys with timestamps
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until you set `ActiveRecord::Base.cache_versioning = true`. That's the setting for all new apps on Rails 5.2+
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*DHH*
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* Respect `SchemaDumper.ignore_tables` in rake tasks for databases structure dump
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*Rusty Geldmacher*, *Guillermo Iguaran*
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* Add type caster to `RuntimeReflection#alias_name`
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Fixes #28959.
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*Jon Moss*
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* Deprecate `supports_statement_cache?`.
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*Ryuta Kamizono*
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* Quote database name in `db:create` grant statement (when database user does not have access to create the database).
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*Rune Philosof*
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* Raise error `UnknownMigrationVersionError` on the movement of migrations
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when the current migration does not exist.
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*bogdanvlviv*
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* Fix `bin/rails db:forward` first migration.
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*bogdanvlviv*
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* Support Descending Indexes for MySQL.
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MySQL 8.0.1 and higher supports descending indexes: `DESC` in an index definition is no longer ignored.
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See https://dev.mysql.com/doc/refman/8.0/en/descending-indexes.html.
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*Ryuta Kamizono*
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* Fix inconsistency with changed attributes when overriding AR attribute reader.
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*bogdanvlviv*
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* When calling the dynamic fixture accessor method with no arguments, it now returns all fixtures of this type.
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Previously this method always returned an empty array.
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*Kevin McPhillips*
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Please check [5-1-stable](https://github.com/rails/rails/blob/5-1-stable/activerecord/CHANGELOG.md) for previous changes.
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