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d9fca84d21
Active Record doesn't rely delegating to `arel` in the internal since425f2ca. The delegation is a lower priority than delegating to `klass`, so it is pretty unclear which method is delegated to `arel`. For example, `bind_values` method was removed atb06f64c(a series of changes79f71d3...b06f64c). But a relation still could respond to the method because `arel` also have the same named method (#28976). Removing the delegation will achieve predictable behavior.
118 lines
3.6 KiB
Markdown
118 lines
3.6 KiB
Markdown
* 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 making 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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