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release notes, extracted notable changes from Active Record CHANGELOG.

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Yves Senn 2015-12-23 12:06:38 +01:00
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commit e426258aa2
2 changed files with 176 additions and 11 deletions
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23
activerecord/CHANGELOG.md
View file

@ -50,7 +50,7 @@
change, passing a string containing a comma to `limit` has been deprecated,
and passing an Arel node to `limit` is no longer supported.
Fixes #22250
Fixes #22250.
*Sean Griffin*
@ -312,7 +312,7 @@
* Don't cache arguments in `#find_by` if they are an `ActiveRecord::Relation`.
Fixes #20817
Fixes #20817.
*Hiroaki Izu*
@ -441,9 +441,9 @@
* Ensure `select` quotes aliased attributes, even when using `from`.
Fixes #21488
Fixes #21488.
*Sean Griffin & @johanlunds*
*Sean Griffin*, *@johanlunds*
* MySQL: support `unsigned` numeric data types.
@ -769,7 +769,7 @@
* Include the `Enumerable` module in `ActiveRecord::Relation`
*Sean Griffin & bogdan*
*Sean Griffin*, *bogdan*
* Use `Enumerable#sum` in `ActiveRecord::Relation` if a block is given.
@ -805,7 +805,7 @@
Fixes #20515.
*Sean Griffin & jmondo*
*Sean Griffin*, *jmondo*
* Deprecate the PostgreSQL `:point` type in favor of a new one which will return
`Point` objects instead of an `Array`
@ -1195,13 +1195,16 @@
*Sean Griffin*
* `scoping` no longer pollutes the current scope of sibling classes when using
STI. e.x.
STI.
Fixes #18806.
Example:
StiOne.none.scoping do
StiTwo.all
end
Fixes #18806.
*Sean Griffin*
@ -1242,7 +1245,7 @@
* Use `SCHEMA` instead of `DB_STRUCTURE` for specifying a structure file.
This makes the db:structure tasks consistent with test:load_structure.
This makes the `db:structure` tasks consistent with `test:load_structure`.
*Dieter Komendera*
@ -1278,7 +1281,7 @@
Fixes #17621.
*Eileen M. Uchitelle, Aaron Patterson*
*Eileen M. Uchitelle*, *Aaron Patterson*
* Fix n+1 query problem when eager loading nil associations (fixes #18312)

164
guides/source/5_0_release_notes.md
View file

@ -329,25 +329,104 @@ Please refer to the [Changelog][active-record] for detailed changes.
### Removals
* Removed deprecated behavior allowing nested arrays to be passed as query
values. ([Pull Request](https://github.com/rails/rails/pull/17919))
* Removed deprecated `ActiveRecord::Tasks::DatabaseTasks#load_schema`. This
method was replaced by `ActiveRecord::Tasks::DatabaseTasks#load_schema_for`.
([commit](https://github.com/rails/rails/commit/ad783136d747f73329350b9bb5a5e17c8f8800da))
* Removed deprecated `serialized_attributes`.
([commit](https://github.com/rails/rails/commit/82043ab53cb186d59b1b3be06122861758f814b2))
* Removed deprecated automatic counter caches on `has_many :through`.
([commit](https://github.com/rails/rails/commit/87c8ce340c6c83342df988df247e9035393ed7a0))
* Removed deprecated `sanitize_sql_hash_for_conditions`.
([commit](https://github.com/rails/rails/commit/3a59dd212315ebb9bae8338b98af259ac00bbef3))
* Removed deprecated `Reflection#source_macro`.
([commit](https://github.com/rails/rails/commit/ede8c199a85cfbb6457d5630ec1e285e5ec49313))
* Removed deprecated `symbolized_base_class` and `symbolized_sti_name`.
([commit](https://github.com/rails/rails/commit/9013e28e52eba3a6ffcede26f85df48d264b8951))
* Removed deprecated `ActiveRecord::Base.disable_implicit_join_references=`.
([commit](https://github.com/rails/rails/commit/0fbd1fc888ffb8cbe1191193bf86933110693dfc))
* Removed deprecated access to connection specification using a string accessor.
([commit](https://github.com/rails/rails/commit/efdc20f36ccc37afbb2705eb9acca76dd8aabd4f))
* Removed deprecated support to preload instance-dependent associations.
([commit](https://github.com/rails/rails/commit/4ed97979d14c5e92eb212b1a629da0a214084078))
* Removed deprecated support for PostgreSQL ranges with exclusive lower bounds.
([commit](https://github.com/rails/rails/commit/a076256d63f64d194b8f634890527a5ed2651115))
* Removed deprecation when modifying a relation with cached Arel.
This raises an `ImmutableRelation` error instead.
([commit](https://github.com/rails/rails/commit/3ae98181433dda1b5e19910e107494762512a86c))
* Removed `ActiveRecord::Serialization::XmlSerializer` from core. This feature
has been extracted into the
[activemodel-serializers-xml](https://github.com/rails/activemodel-serializers-xml)
gem. ([Pull Request](https://github.com/rails/rails/pull/21161))
* Removed support for the legacy `mysql` database adapter from core. It will
live on in a separate gem for now, but most users should just use `mysql2`.
### Deprecations
* Deprecated passing a class as a value in a query. Users should pass strings
instead. ([Pull Request](https://github.com/rails/rails/pull/17916))
* Deprecated returning `false` as a way to halt Active Record callback
chains. The recommended way is to
`throw(:abort)`. ([Pull Request](https://github.com/rails/rails/pull/17227))
* Deprecated `ActiveRecord::Base.errors_in_transactional_callbacks=`.
([commit](https://github.com/rails/rails/commit/07d3d402341e81ada0214f2cb2be1da69eadfe72))
* Deprecated passing of `start` value to `find_in_batches` and `find_each`
in favour of `begin_at` value.
([Pull Request](https://github.com/rails/rails/pull/18961))
* Deprecated `Relation#uniq` use `Relation#distinct` instead.
([commit](https://github.com/rails/rails/commit/adfab2dcf4003ca564d78d4425566dd2d9cd8b4f))
* Deprecated the PostgreSQL `:point` type in favor of a new one which will return
`Point` objects instead of an `Array`
([Pull Request](https://github.com/rails/rails/pull/20448))
* Deprecated force association reload by passing a truthy argument to
association method.
([Pull Request](https://github.com/rails/rails/pull/20888))
* Deprecated the keys for association `restrict_dependent_destroy` errors in favor
of new key names.
([Pull Request](https://github.com/rails/rails/pull/20668))
* Synchronize behavior of `#tables`.
([Pull Request](https://github.com/rails/rails/pull/21601))
* Deprecated `SchemaCache#tables`, `SchemaCache#table_exists?` and
`SchemaCache#clear_table_cache!` in favor of their new data source
counterparts.
([Pull Request](https://github.com/rails/rails/pull/21715))
* Deprecated `connection.tables` on the SQLite3 and MySQL adapters.
([Pull Request](https://github.com/rails/rails/pull/21601))
* Deprecated passing arguments to `#tables` - the `#tables` method of some
adapters (mysql2, sqlite3) would return both tables and views while others
(postgresql) just return tables. To make their behavior consistent,
`#tables` will return only tables in the future.
([Pull Request](https://github.com/rails/rails/pull/21601))
* Deprecated `table_exists?` - The `#table_exists?` method would check both
tables and views. To make their behavior consistent with `#tables`,
`#table_exists?` will check only tables in the future.
([Pull Request](https://github.com/rails/rails/pull/21601))
### Notable changes
@ -370,6 +449,89 @@ Please refer to the [Changelog][active-record] for detailed changes.
([Pull Request](https://github.com/rails/rails/pull/18937)) - Deprecate
`required` option in favor of `optional` for `belongs_to`
* Changed the default `null` value for `timestamps` to `false`.
([commit](https://github.com/rails/rails/commit/a939506f297b667291480f26fa32a373a18ae06a))
* Added `ActiveRecord::SecureToken` in order to encapsulate generation of
unique tokens for attributes in a model using `SecureRandom`.
([Pull Request](https://github.com/rails/rails/pull/18217))
* Added `:if_exists` option for `drop_table`.
([Pull Request](https://github.com/rails/rails/pull/18597))
* Added `ActiveRecord::Base#accessed_fields`, which can be used to quickly
discover which fields were read from a model when you are looking to only
select the data you need from the database.
([commit](https://github.com/rails/rails/commit/be9b68038e83a617eb38c26147659162e4ac3d2c))
* Added the `#or` method on `ActiveRecord::Relation`, allowing use of the OR
operator to combine WHERE or HAVING clauses.
([commit](https://github.com/rails/rails/commit/b0b37942d729b6bdcd2e3178eda7fa1de203b3d0))
* Added `:time` option added for `#touch`.
([Pull Request](https://github.com/rails/rails/pull/18956))
* Added `ActiveRecord::Base.suppress` to prevent the receiver from being saved
during the given block.
([Pull Request](https://github.com/rails/rails/pull/18910))
* `belongs_to` will now trigger a validation error by default if the
association is not present. You can turn this off on a per-association basis
with `optional: true`.
([Pull Request](https://github.com/rails/rails/pull/18937))
* Added `config.active_record.dump_schemas` to configure the behavior of
`db:structure:dump`.
([Pull Request](https://github.com/rails/rails/pull/19347))
* Added `config.active_record.warn_on_records_fetched_greater_than` option.
([Pull Request](https://github.com/rails/rails/pull/18846))
* Added `cache_key` to `ActiveRecord::Relation`.
([Pull Request](https://github.com/rails/rails/pull/20884))
* Added a native JSON data type support in MySQL.
([Pull Request](https://github.com/rails/rails/pull/21110))
* Added support for dropping indexes concurrently in PostgreSQL.
([Pull Request](https://github.com/rails/rails/pull/21317))
* Added `#views` and `#view_exists?` methods on connection adapters.
([Pull Request](https://github.com/rails/rails/pull/21609))
* Added `ActiveRecord::Base.ignored_columns` to make some columns
invisible from Active Record.
([Pull Request](https://github.com/rails/rails/pull/21720))
* Added `connection.data_sources` and `connection.data_source_exists?`.
These methods determine what relations can be used to back Active Record
models (usually tables and views).
([Pull Request](https://github.com/rails/rails/pull/21715))
* Allow fixtures files to set the model class in the YAML file itself.
([Pull Request](https://github.com/rails/rails/pull/20574))
* Added ability to default to `uuid` as primary key when generating database
migrations. ([Pull Request](https://github.com/rails/rails/pull/21762))
* Added `ActiveRecord::Relation#left_joins` and
`ActiveRecord::Relation#left_outer_joins`.
([Pull Request](https://github.com/rails/rails/pull/12071))
* Added `after_{create,update,delete}_commit` callbacks.
([Pull Request](https://github.com/rails/rails/pull/22516))
* Version the API presented to migration classes, so we can change parameter
defaults without breaking existing migrations, or forcing them to be
rewritten through a deprecation cycle.
([Pull Request](https://github.com/rails/rails/pull/21538))
* `ApplicationRecord` is a new superclass for all app models, analogous to app
controllers subclassing `ApplicationController` instead of
`ActionController::Base`. This gives apps a single spot to configure app-wide
model behavior.
([Pull Request](https://github.com/rails/rails/pull/22567))
Active Model
------------
@ -579,7 +741,7 @@ Please refer to the [Changelog][active-support] for detailed changes.
application source code, routes, locales, etc.
([Pull Request](https://github.com/rails/rails/pull/22254))
* Add thread_m/cattr_accessor/reader/writer suite of methods for declaring
* Added thread_m/cattr_accessor/reader/writer suite of methods for declaring
class and module variables that live per-thread.
([Pull Request](https://github.com/rails/rails/pull/22630))