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diff --git a/activerecord/CHANGELOG.md b/activerecord/CHANGELOG.md index 19d2195bca..d9f8ee7097 100644 --- a/activerecord/CHANGELOG.md +++ b/activerecord/CHANGELOG.md @@ -1,3 +1,1374 @@ +* Currently Active Record can be configured via the environment variable + `DATABASE_URL` or by manually injecting a hash of values which is what Rails does, + reading in `database.yml` and setting Active Record appropriately. Active Record + expects to be able to use `DATABASE_URL` without the use of Rails, and we cannot + rip out this functionality without deprecating. This presents a problem though + when both config is set, and a `DATABASE_URL` is present. Currently the + `DATABASE_URL` should "win" and none of the values in `database.yml` are + used. This is somewhat unexpected, if one were to set values such as + `pool` in the `production:` group of `database.yml` they are ignored. + + There are many ways that Active Record initiates a connection today: + + - Stand Alone (without rails) + - `rake db:<tasks>` + - `ActiveRecord.establish_connection` + + - With Rails + - `rake db:<tasks>` + - `rails <server> | <console>` + - `rails dbconsole` + + Now all of these behave exactly the same way. The best way to do + this is to put all of this logic in one place so it is guaranteed to be used. + + Here is the matrix of how this behavior works: + + ``` + No database.yml + No DATABASE_URL + => Error + ``` + + ``` + database.yml present + No DATABASE_URL + => Use database.yml configuration + ``` + + ``` + No database.yml + DATABASE_URL present + => use DATABASE_URL configuration + ``` + + ``` + database.yml present + DATABASE_URL present + => Merged into `url` sub key. If both specify `url` sub key, the `database.yml` `url` + sub key "wins". If other paramaters `adapter` or `database` are specified in YAML, + they are discarded as the `url` sub key "wins". + ``` + + Current implementation uses `ActiveRecord::Base.configurations` to resolve and merge + all connection information before returning. This is achieved through a utility + class: `ActiveRecord::ConnectionHandling::MergeAndResolveDefaultUrlConfig`. + + To understand the exact behavior of this class, it is best to review the + behavior in `activerecord/test/cases/connection_adapters/connection_handler_test.rb` + + *Richard Schneeman* + +* Make `change_column_null` revertable. Fixes #13576. + + *Yves Senn*, *Nishant Modak*, *Prathamesh Sonpatki* + +* Don't create/drop the test database if RAILS_ENV is specified explicitly. + + Previously, when the environment was development, we would always + create or drop both the test and development databases. + + Now, if RAILS_ENV is explicitly defined as development, we don't create + the test database. + + *Damien Mathieu* + +* Initialize version on Migration objects so that it can be used in a migration, + and it will be included in the announce message. + + *Dylan Thacker-Smith* + +* `change_table` now uses the current adapter's `update_table_definition` + method to retrieve a specific table definition. + This ensures that `change_table` and `create_table` will use + similar objects. + + Fixes #13577 and #13503. + + *Nishant Modak*, *Prathamesh Sonpatki*, *Rafael Mendonça França* + +* Fixed ActiveRecord::Store nil conversion TypeError when using YAML coder. + In case the YAML passed as paramter is nil, uses an empty string. + + Fixes #13570. + + *Thales Oliveira* + +* Deprecate unused `ActiveRecord::Base.symbolized_base_class` + and `ActiveRecord::Base.symbolized_sti_name` without replacement. + + *Yves Senn* + +* Since the `test_help.rb` file in Railties now automatically maintains + your test schema, the `rake db:test:*` tasks are deprecated. This + doesn't stop you manually running other tasks on your test database + if needed: + + rake db:schema:load RAILS_ENV=test + + *Jon Leighton* + +* Fix presence validator for association when the associated record responds to `to_a`. + + *gmarik* + +* Fixed regression on preload/includes with multiple arguments failing in certain conditions, + raising a NoMethodError internally by calling `reflect_on_association` for `NilClass:Class`. + + Fixes #13437. + + *Vipul A M*, *khustochka* + +* Add the ability to nullify the `enum` column. + + Example: + + class Conversation < ActiveRecord::Base + enum gender: [:female, :male] + end + + Conversation::GENDER # => { female: 0, male: 1 } + + # conversation.update! gender: 0 + conversation.female! + conversation.female? # => true + conversation.gender # => "female" + + # conversation.update! gender: nil + conversation.gender = nil + conversation.gender.nil? # => true + conversation.gender # => nil + + *Amr Tamimi* + +* Connection specification now accepts a "url" key. The value of this + key is expected to contain a database URL. The database URL will be + expanded into a hash and merged. + + *Richard Schneeman* + +* An `ArgumentError` is now raised on a call to `Relation#where.not(nil)`. + + Example: + + User.where.not(nil) + + # Before + # => 'SELECT `users`.* FROM `users` WHERE (NOT (NULL))' + + # After + # => ArgumentError, 'Invalid argument for .where.not(), got nil.' + + *Kuldeep Aggarwal* + +* Deprecated use of string argument as a configuration lookup in + `ActiveRecord::Base.establish_connection`. Instead, a symbol must be given. + + *José Valim* + +* Fixed `update_column`, `update_columns`, and `update_all` to correctly serialize + values for `array`, `hstore` and `json` column types in PostgreSQL. + + Fixes #12261. + + *Tadas Tamosauskas*, *Carlos Antonio da Silva* + +* Do not consider PostgreSQL array columns as number or text columns. + + The code uses these checks in several places to know what to do with a + particular column, for instance AR attribute query methods has a branch + like this: + + if column.number? + !value.zero? + end + + This should never be true for array columns, since it would be the same + as running [].zero?, which results in a NoMethodError exception. + + Fixing this by ensuring that array columns in PostgreSQL never return + true for number?/text? checks. + + *Carlos Antonio da Silva* + +* When connecting to a non-existant database, the error: + `ActiveRecord::NoDatabaseError` will now be raised. When being used with Rails + the error message will include information on how to create a database: + `rake db:create`. Supported adapters: postgresql, mysql, mysql2, sqlite3 + + *Richard Schneeman* + +* Do not raise `'cannot touch on a new record object'` exception on destroying + already destroyed `belongs_to` association with `touch: true` option. + + Fixes #13445. + + Example: + + # Given Comment has belongs_to :post, touch: true + comment.post.destroy + comment.destroy # no longer raises an error + + *Paul Nikitochkin* + +* Fix a bug when assigning an array containing string numbers to a + PostgreSQL integer array column. + + Fixes #13444. + + Example: + + # Given Book#ratings is of type :integer, array: true + Book.new(ratings: [1, 2]) # worked before + Book.new(ratings: ['1', '2']) # now works as well + + *Damien Mathieu* + +* Improve the default select when `from` is used. + + Previously, if you did something like Topic.from(:temp_topics), it + would generate SQL like: + + SELECT topics.* FROM temp_topics; + + Which is will cause an error since there's not a topics table to select + from. + + Now the default if you use from is just `*`: + + SELECT * FROM temp_topics; + + *Cody Cutrer* + +* Fix `PostgreSQL` insert to properly extract table name from multiline string SQL. + + Previously, executing an insert SQL in `PostgreSQL` with a command like this: + + insert into articles( + number) + values( + 5152 + ) + + would not work because the adapter was unable to extract the correct `articles` + table name. + + *Kuldeep Aggarwal* + +* `Relation` no longer has mutator methods like `#map!` and `#delete_if`. Convert + to an `Array` by calling `#to_a` before using these methods. + + It intends to prevent odd bugs and confusion in code that call mutator + methods directly on the `Relation`. + + Example: + + # Instead of this + Author.where(name: 'Hank Moody').compact! + + # Now you have to do this + authors = Author.where(name: 'Hank Moody').to_a + authors.compact! + + *Lauro Caetano* + +* Better support for `where()` conditions that use a `belongs_to` + association name. + + Using the name of an association in `where` previously worked only + if the value was a single `ActiveRecord::Base` object. e.g. + + Post.where(author: Author.first) + + Any other values, including `nil`, would cause invalid SQL to be + generated. This change supports arguments in the `where` query + conditions where the key is a `belongs_to` association name and the + value is `nil`, an `Array` of `ActiveRecord::Base` objects, or an + `ActiveRecord::Relation` object. + + class Post < ActiveRecord::Base + belongs_to :author + end + + `nil` value finds records where the association is not set: + + Post.where(author: nil) + # SELECT "posts".* FROM "posts" WHERE "posts"."author_id" IS NULL + + `Array` values find records where the association foreign key + matches the ids of the passed ActiveRecord models, resulting + in the same query as `Post.where(author_id: [1,2])`: + + authors_array = [Author.find(1), Author.find(2)] + Post.where(author: authors_array) + # SELECT "posts".* FROM "posts" WHERE "posts"."author_id" IN (1, 2) + + `ActiveRecord::Relation` values find records using the same + query as `Post.where(author_id: Author.where(last_name: "Emde"))` + + Post.where(author: Author.where(last_name: "Emde")) + # SELECT "posts".* FROM "posts" + # WHERE "posts"."author_id" IN ( + # SELECT "authors"."id" FROM "authors" + # WHERE "authors"."last_name" = 'Emde') + + Polymorphic `belongs_to` associations will continue to be handled + appropriately, with the polymorphic `association_type` field added + to the query to match the base class of the value. This feature + previously only worked when the value was a single `ActveRecord::Base`. + + class Post < ActiveRecord::Base + belongs_to :author, polymorphic: true + end + + Post.where(author: Author.where(last_name: "Emde")) + # Generates a query similar to: + Post.where(author_id: Author.where(last_name: "Emde"), author_type: "Author") + + *Martin Emde* + +* Respect temporary option when dropping tables with MySQL. + + Normal DROP TABLE also works, but commits the transaction. + + drop_table :temporary_table, temporary: true + + *Cody Cutrer* + +* Add option to create tables from a query. + + create_table(:long_query, temporary: true, + as: "SELECT * FROM orders INNER JOIN line_items ON order_id=orders.id") + + Generates: + + CREATE TEMPORARY TABLE long_query AS + SELECT * FROM orders INNER JOIN line_items ON order_id=orders.id + + *Cody Cutrer* + +* `db:test:clone` and `db:test:prepare` must load Rails environment. + + `db:test:clone` and `db:test:prepare` use `ActiveRecord::Base`. configurations, + so we need to load the Rails environment, otherwise the config wont be in place. + + *arthurnn* + +* Use the right column to type cast grouped calculations with custom expressions. + + Fixes #13230. + + Example: + + # Before + Account.group(:firm_name).sum('0.01 * credit_limit') + # => { '37signals' => '0.5' } + + # After + Account.group(:firm_name).sum('0.01 * credit_limit') + # => { '37signals' => 0.5 } + + *Paul Nikitochkin* + +* Polymorphic `belongs_to` associations with the `touch: true` option set update the timestamps of + the old and new owner correctly when moved between owners of different types. + + Example: + + class Rating < ActiveRecord::Base + belongs_to :rateable, polymorphic: true, touch: true + end + + rating = Rating.create rateable: Song.find(1) + rating.update_attributes rateable: Book.find(2) # => timestamps of Song(1) and Book(2) are updated + + *Severin Schoepke* + +* Improve formatting of migration exception messages: make them easier to read + with line breaks before/after, and improve the error for pending migrations. + + *John Bachir* + +* Fix `last` with `offset` to return the proper record instead of always the last one. + + Example: + + Model.offset(4).last + # => returns the 4th record from the end. + + Fixes #7441. + + *kostya*, *Lauro Caetano* + +* `type_to_sql` returns a `String` for unmapped columns. This fixes an error + when using unmapped array types in PG + + Example: + + change_colum :table, :column, :bigint, array: true + + Fixes #13146. + + *Jens Fahnenbruck*, *Yves Senn* + +* Fix `QueryCache` to work with nested blocks, so that it will only clear the existing cache + after leaving the outer block instead of clearing it right after the inner block is finished. + + *Vipul A M* + +* The ERB in fixture files is no longer evaluated in the context of the main + object. Helper methods used by multiple fixtures should be defined on the + class object returned by `ActiveRecord::FixtureSet.context_class`. + + *Victor Costan* + +* Previously, the `has_one` macro incorrectly accepted the `counter_cache` + option, but never actually supported it. Now it will raise an `ArgumentError` + when using `has_one` with `counter_cache`. + + *Godfrey Chan* + +* Implement `rename_index` natively for MySQL >= 5.7. + + *Cody Cutrer* + +* Fix bug when validating the uniqueness of an aliased attribute. + + Fixes #12402. + + *Lauro Caetano* + +* Update counter cache on a `has_many` relationship regardless of default scope. + + Fix #12952. + + *Uku Taht* + +* `rename_index` adds the new index before removing the old one. This allows to + rename indexes on columns with a foreign key and prevents the following error: + + Cannot drop index 'index_engines_on_car_id': needed in a foreign key constraint + + *Cody Cutrer*, *Yves Senn* + +* Raise `ActiveRecord::RecordNotDestroyed` when a replaced child marked with `dependent: destroy` fails to be destroyed. + + Fix #12812 + + *Brian Thomas Storti* + +* Fix validation on uniqueness of empty association. + + *Evgeny Li* + +* Make `ActiveRecord::Relation#unscope` affect relations it is merged in to. + + *Jon Leighton* + +* Use strings to represent non-string `order_values`. + + *Yves Senn* + +* Checks to see if the record contains the foreign key to set the inverse automatically. + + *Edo Balvers* + +* Added `ActiveRecord::Base.to_param` for convenient "pretty" URLs derived from a model's attribute or method. + + Example: + + class User < ActiveRecord::Base + to_param :name + end + + user = User.find_by(name: 'Fancy Pants') + user.id # => 123 + user.to_param # => "123-fancy-pants" + + *Javan Makhmali* + +* Added `ActiveRecord::Base.no_touching`, which allows ignoring touch on models. + + Example: + + Post.no_touching do + Post.first.touch + end + + *Sam Stephenson*, *Damien Mathieu* + +* Prevent the counter cache from being decremented twice when destroying + a record on a `has_many :through` association. + + Fixes #11079. + + *Dmitry Dedov* + +* Unify boolean type casting for `MysqlAdapter` and `Mysql2Adapter`. + `type_cast` will return `1` for `true` and `0` for `false`. + + Fixes #11119. + + *Adam Williams*, *Yves Senn* + +* Fix bug where `has_one` association record update result in crash, when replaced with itself. + + Fixes #12834. + + *Denis Redozubov*, *Sergio Cambra* + +* Log bind variables after they are type casted. This makes it more + transparent what values are actually sent to the database. + + irb(main):002:0> Event.find("im-no-integer") + # Before: ... WHERE "events"."id" = $1 LIMIT 1 [["id", "im-no-integer"]] + # After: ... WHERE "events"."id" = $1 LIMIT 1 [["id", 0]] + + *Yves Senn* + +* Fix uninitialized constant `TransactionState` error when `Marshall.load` is used on an Active Record result. + + Fixes #12790. + + *Jason Ayre* + +* `.unscope` now removes conditions specified in `default_scope`. + + *Jon Leighton* + +* Added `ActiveRecord::QueryMethods#rewhere` which will overwrite an existing, named where condition. + + Examples: + + Post.where(trashed: true).where(trashed: false) #=> WHERE `trashed` = 1 AND `trashed` = 0 + Post.where(trashed: true).rewhere(trashed: false) #=> WHERE `trashed` = 0 + Post.where(active: true).where(trashed: true).rewhere(trashed: false) #=> WHERE `active` = 1 AND `trashed` = 0 + + *DHH* + +* Extend `ActiveRecord::Base#cache_key` to take an optional list of timestamp attributes of which the highest will be used. + + Example: + + # last_reviewed_at will be used, if that's more recent than updated_at, or vice versa + Person.find(5).cache_key(:updated_at, :last_reviewed_at) + + *DHH* + +* Added `ActiveRecord::Base#enum` for declaring enum attributes where the values map to integers in the database, but can be queried by name. + + Example: + + class Conversation < ActiveRecord::Base + enum status: [:active, :archived] + end + + Conversation::STATUS # => { active: 0, archived: 1 } + + # conversation.update! status: 0 + conversation.active! + conversation.active? # => true + conversation.status # => "active" + + # conversation.update! status: 1 + conversation.archived! + conversation.archived? # => true + conversation.status # => "archived" + + # conversation.update! status: 1 + conversation.status = :archived + + *DHH* + +* `ActiveRecord::Base#attribute_for_inspect` now truncates long arrays (more than 10 elements). + + *Jan Bernacki* + +* Allow for the name of the `schema_migrations` table to be configured. + + *Jerad Phelps* + +* Do not add to scope includes values from through associations. + Fixed bug when providing `includes` in through association scope, and fetching targets. + + Example: + + class Vendor < ActiveRecord::Base + has_many :relationships, -> { includes(:user) } + has_many :users, through: :relationships + end + + vendor = Vendor.first + + # Before + + vendor.users.to_a # => Raises exception: not found `:user` for `User` + + # After + + vendor.users.to_a # => No exception is raised + + Fixes #12242, #9517, #10240. + + *Paul Nikitochkin* + +* Type cast json values on write, so that the value is consistent + with reading from the database. + + Example: + + x = JsonDataType.new tags: {"string" => "foo", :symbol => :bar} + + # Before: + x.tags # => {"string" => "foo", :symbol => :bar} + + # After: + x.tags # => {"string" => "foo", "symbol" => "bar"} + + *Severin Schoepke* + +* `ActiveRecord::Store` works together with PG `hstore` columns. + + Fixes #12452. + + *Yves Senn* + +* Fix bug where `ActiveRecord::Store` used a global `Hash` to keep track of + all registered `stored_attributes`. Now every subclass of + `ActiveRecord::Base` has it's own `Hash`. + + *Yves Senn* + +* Save `has_one` association when primary key is manually set. + + Fixes #12302. + + *Lauro Caetano* + +* Allow any version of BCrypt when using `has_secure_password`. + + *Mike Perham* + +* Sub-query generated for `Relation` passed as array condition did not take in account + bind values and have invalid syntax. + + Generate sub-query with inline bind values. + + Fixes #12586. + + *Paul Nikitochkin* + +* Fix a bug where rake db:structure:load crashed when the path contained + spaces. + + *Kevin Mook* + +* `ActiveRecord::QueryMethods#unscope` unscopes negative equality + + Allows you to call `#unscope` on a relation with negative equality + operators, i.e. `Arel::Nodes::NotIn` and `Arel::Nodes::NotEqual` that have + been generated through the use of `where.not`. + + *Eric Hankins* + +* Raise an exception when model without primary key calls `.find_with_ids`. + + *Shimpei Makimoto* + +* Make `Relation#empty?` use `exists?` instead of `count`. + + *Szymon Nowak* + +* `rake db:structure:dump` no longer crashes when the port was specified as `Fixnum`. + + *Kenta Okamoto* + +* `NullRelation#pluck` takes a list of columns + + The method signature in `NullRelation` was updated to mimic that in + `Calculations`. + + *Derek Prior* + +* `scope_chain` should not be mutated for other reflections. + + Currently `scope_chain` uses same array for building different + `scope_chain` for different associations. During processing + these arrays are sometimes mutated and because of in-place + mutation the changed `scope_chain` impacts other reflections. + + Fix is to dup the value before adding to the `scope_chain`. + + Fixes #3882. + + *Neeraj Singh* + +* Prevent the inversed association from being reloaded on save. + + Fixes #9499. + + *Dmitry Polushkin* + +* Generate subquery for `Relation` if it passed as array condition for `where` + method. + + Example: + + # Before + Blog.where('id in (?)', Blog.where(id: 1)) + # => SELECT "blogs".* FROM "blogs" WHERE "blogs"."id" = 1 + # => SELECT "blogs".* FROM "blogs" WHERE (id IN (1)) + + # After + Blog.where('id in (?)', Blog.where(id: 1).select(:id)) + # => SELECT "blogs".* FROM "blogs" + # WHERE "blogs"."id" IN (SELECT "blogs"."id" FROM "blogs" WHERE "blogs"."id" = 1) + + Fixes #12415. + + *Paul Nikitochkin* + +* For missed association exception message + which is raised in `ActiveRecord::Associations::Preloader` class + added owner record class name in order to simplify to find problem code. + + *Paul Nikitochkin* + +* `has_and_belongs_to_many` is now transparently implemented in terms of + `has_many :through`. Behavior should remain the same, if not, it is a bug. + +* `create_savepoint`, `rollback_to_savepoint` and `release_savepoint` accept + a savepoint name. + + *Yves Senn* + +* Make `next_migration_number` accessible for third party generators. + + *Yves Senn* + +* Objects instantiated using a null relationship will now retain the + attributes of the where clause. + + Fixes #11676, #11675, #11376. + + *Paul Nikitochkin*, *Peter Brown*, *Nthalk* + +* Fixed `ActiveRecord::Associations::CollectionAssociation#find` + when using `has_many` association with `:inverse_of` and finding an array of one element, + it should return an array of one element too. + + *arthurnn* + +* Callbacks on has_many should access the in memory parent if a inverse_of is set. + + *arthurnn* + +* `ActiveRecord::ConnectionAdapters.string_to_time` respects + string with timezone (e.g. Wed, 04 Sep 2013 20:30:00 JST). + + Fixes #12278. + + *kennyj* + +* Calling `update_attributes` will now throw an `ArgumentError` whenever it + gets a `nil` argument. More specifically, it will throw an error if the + argument that it gets passed does not respond to to `stringify_keys`. + + Example: + + @my_comment.update_attributes(nil) # => raises ArgumentError + + *John Wang* + +* Deprecate `quoted_locking_column` method, which isn't used anywhere. + + *kennyj* + +* Migration dump UUID default functions to schema.rb. + + Fixes #10751. + + *kennyj* + +* Fixed a bug in `ActiveRecord::Associations::CollectionAssociation#find_by_scan` + when using `has_many` association with `:inverse_of` option and UUID primary key. + + Fixes #10450. + + *kennyj* + +* Fix: joins association, with defined in the scope block constraints by using several + where constraints and at least of them is not `Arel::Nodes::Equality`, + generates invalid SQL expression. + + Fixes #11963. + + *Paul Nikitochkin* + +* `CollectionAssociation#first`/`#last` (e.g. `has_many`) use a `LIMIT`ed + query to fetch results rather than loading the entire collection. + + *Lann Martin* + +* Make possible to run SQLite rake tasks without the `Rails` constant defined. + + *Damien Mathieu* + +* Allow Relation#from to accept other relations with bind values. + + *Ryan Wallace* + +* Fix inserts with prepared statements disabled. + + Fixes #12023. + + *Rafael Mendonça França* + +* Setting a has_one association on a new record no longer causes an empty + transaction. + + *Dylan Thacker-Smith* + +* Fix `AR::Relation#merge` sometimes failing to preserve `readonly(false)` flag. + + *thedarkone* + +* Re-use `order` argument pre-processing for `reorder`. + + *Paul Nikitochkin* + +* Fix PredicateBuilder so polymorphic association keys in `where` clause can + accept objects other than direct descendants of `ActiveRecord::Base` (decorated + models, for example). + + *Mikhail Dieterle* + +* PostgreSQL adapter recognizes negative money values formatted with + parentheses (eg. `($1.25) # => -1.25`)). + Fixes #11899. + + *Yves Senn* + +* Stop interpreting SQL 'string' columns as :string type because there is no + common STRING datatype in SQL. + + *Ben Woosley* + +* `ActiveRecord::FinderMethods#exists?` returns `true`/`false` in all cases. + + *Xavier Noria* + +* Assign inet/cidr attribute with `nil` value for invalid address. + + Example: + + record = User.new + record.logged_in_from_ip # is type of an inet or a cidr + + # Before: + record.logged_in_from_ip = 'bad ip address' # raise exception + + # After: + record.logged_in_from_ip = 'bad ip address' # do not raise exception + record.logged_in_from_ip # => nil + record.logged_in_from_ip_before_type_cast # => 'bad ip address' + + *Paul Nikitochkin* + +* `add_to_target` now accepts a second optional `skip_callbacks` argument + + If truthy, it will skip the :before_add and :after_add callbacks. + + *Ben Woosley* + +* Fix interactions between `:before_add` callbacks and nested attributes + assignment of `has_many` associations, when the association was not + yet loaded: + + - A `:before_add` callback was being called when a nested attributes + assignment assigned to an existing record. + + - Nested Attributes assignment did not affect the record in the + association target when a `:before_add` callback triggered the + loading of the association + + *Jörg Schray* + +* Allow enable_extension migration method to be revertible. + + *Eric Tipton* + +* Type cast hstore values on write, so that the value is consistent + with reading from the database. + + Example: + + x = Hstore.new tags: {"bool" => true, "number" => 5} + + # Before: + x.tags # => {"bool" => true, "number" => 5} + + # After: + x.tags # => {"bool" => "true", "number" => "5"} + + *Yves Senn* , *Severin Schoepke* + +* Fix multidimensional PG arrays containing non-string items. + + *Yves Senn* + +* Fixes bug when using includes combined with select, the select statement was overwritten. + + Fixes #11773. + + *Edo Balvers* + +* Load fixtures from linked folders. + + *Kassio Borges* + +* Create a directory for sqlite3 file if not present on the system. + + *Richard Schneeman* + +* Removed redundant override of `xml` column definition for PG, + in order to use `xml` column type instead of `text`. + + *Paul Nikitochkin*, *Michael Nikitochkin* + +* Revert `ActiveRecord::Relation#order` change that make new order + prepend the old one. + + Before: + + User.order("name asc").order("created_at desc") + # SELECT * FROM users ORDER BY created_at desc, name asc + + After: + + User.order("name asc").order("created_at desc") + # SELECT * FROM users ORDER BY name asc, created_at desc + + This also affects order defined in `default_scope` or any kind of associations. + +* Add ability to define how a class is converted to Arel predicates. + For example, adding a very vendor specific regex implementation: + + regex_handler = proc do |column, value| + Arel::Nodes::InfixOperation.new('~', column, value.source) + end + ActiveRecord::PredicateBuilder.register_handler(Regexp, regex_handler) + + *Sean Griffin & @joannecheng* + +* Don't allow `quote_value` to be called without a column. + + Some adapters require column information to do their job properly. + By enforcing the provision of the column for this internal method + we ensure that those using adapters that require column information + will always get the proper behavior. + + *Ben Woosley* + +* When using optimistic locking, `update` was not passing the column to `quote_value` + to allow the connection adapter to properly determine how to quote the value. This was + affecting certain databases that use specific column types. + + Fixes #6763. + + *Alfred Wong* + +* rescue from all exceptions in `ConnectionManagement#call` + + Fixes #11497. + + As `ActiveRecord::ConnectionAdapters::ConnectionManagement` middleware does + not rescue from Exception (but only from StandardError), the Connection + Pool quickly runs out of connections when multiple erroneous Requests come + in right after each other. + + Rescuing from all exceptions and not just StandardError, fixes this + behaviour. + + *Vipul A M* + +* `change_column` for PostgreSQL adapter respects the `:array` option. + + *Yves Senn* + +* Remove deprecation warning from `attribute_missing` for attributes that are columns. + + *Arun Agrawal* + +* Remove extra decrement of transaction deep level. + + Fixes #4566. + + *Paul Nikitochkin* + +* Reset @column_defaults when assigning `locking_column`. + We had a potential problem. For example: + + class Post < ActiveRecord::Base + self.column_defaults # if we call this unintentionally before setting locking_column ... + self.locking_column = 'my_locking_column' + end + + Post.column_defaults["my_locking_column"] + => nil # expected value is 0 ! + + *kennyj* + +* Remove extra select and update queries on save/touch/destroy ActiveRecord model + with belongs to reflection with option `touch: true`. + + Fixes #11288. + + *Paul Nikitochkin* + +* Remove deprecated nil-passing to the following `SchemaCache` methods: + `primary_keys`, `tables`, `columns` and `columns_hash`. + + *Yves Senn* + +* Remove deprecated block filter from `ActiveRecord::Migrator#migrate`. + + *Yves Senn* + +* Remove deprecated String constructor from `ActiveRecord::Migrator`. + + *Yves Senn* + +* Remove deprecated `scope` use without passing a callable object. + + *Arun Agrawal* + +* Remove deprecated `transaction_joinable=` in favor of `begin_transaction` + with `:joinable` option. + + *Arun Agrawal* + +* Remove deprecated `decrement_open_transactions`. + + *Arun Agrawal* + +* Remove deprecated `increment_open_transactions`. + + *Arun Agrawal* + +* Remove deprecated `PostgreSQLAdapter#outside_transaction?` + method. You can use `#transaction_open?` instead. + + *Yves Senn* + +* Remove deprecated `ActiveRecord::Fixtures.find_table_name` in favor of + `ActiveRecord::Fixtures.default_fixture_model_name`. + + *Vipul A M* + +* Removed deprecated `columns_for_remove` from `SchemaStatements`. + + *Neeraj Singh* + +* Remove deprecated `SchemaStatements#distinct`. + + *Francesco Rodriguez* + +* Move deprecated `ActiveRecord::TestCase` into the rails test + suite. The class is no longer public and is only used for internal + Rails tests. + + *Yves Senn* + +* Removed support for deprecated option `:restrict` for `:dependent` + in associations. + + *Neeraj Singh* + +* Removed support for deprecated `delete_sql` in associations. + + *Neeraj Singh* + +* Removed support for deprecated `insert_sql` in associations. + + *Neeraj Singh* + +* Removed support for deprecated `finder_sql` in associations. + + *Neeraj Singh* + +* Support array as root element in JSON fields. + + *Alexey Noskov & Francesco Rodriguez* + +* Removed support for deprecated `counter_sql` in associations. + + *Neeraj Singh* + +* Do not invoke callbacks when `delete_all` is called on collection. + + Method `delete_all` should not be invoking callbacks and this + feature was deprecated in Rails 4.0. This is being removed. + `delete_all` will continue to honor the `:dependent` option. However + if `:dependent` value is `:destroy` then the `:delete_all` deletion + strategy for that collection will be applied. + + User can also force a deletion strategy by passing parameter to + `delete_all`. For example you can do `@post.comments.delete_all(:nullify)`. + + *Neeraj Singh* + +* Calling default_scope without a proc will now raise `ArgumentError`. + + *Neeraj Singh* + +* Removed deprecated method `type_cast_code` from Column. + + *Neeraj Singh* + +* Removed deprecated options `delete_sql` and `insert_sql` from HABTM + association. + + Removed deprecated options `finder_sql` and `counter_sql` from + collection association. + + *Neeraj Singh* + +* Remove deprecated `ActiveRecord::Base#connection` method. + Make sure to access it via the class. + + *Yves Senn* + +* Remove deprecation warning for `auto_explain_threshold_in_seconds`. + + *Yves Senn* + +* Remove deprecated `:distinct` option from `Relation#count`. + + *Yves Senn* + +* Removed deprecated methods `partial_updates`, `partial_updates?` and + `partial_updates=`. + + *Neeraj Singh* + +* Removed deprecated method `scoped`. + + *Neeraj Singh* + +* Removed deprecated method `default_scopes?`. + + *Neeraj Singh* + +* Remove implicit join references that were deprecated in 4.0. + + Example: + + # before with implicit joins + Comment.where('posts.author_id' => 7) + + # after + Comment.references(:posts).where('posts.author_id' => 7) + + *Yves Senn* + +* Apply default scope when joining associations. For example: + + class Post < ActiveRecord::Base + default_scope -> { where published: true } + end + + class Comment + belongs_to :post + end + + When calling `Comment.joins(:post)`, we expect to receive only + comments on published posts, since that is the default scope for + posts. + + Before this change, the default scope from `Post` was not applied, + so we'd get comments on unpublished posts. + + *Jon Leighton* + +* Remove `activerecord-deprecated_finders` as a dependency. + + *Łukasz Strzałkowski* + +* Remove Oracle / Sqlserver / Firebird database tasks that were deprecated in 4.0. + + *kennyj* + +* `find_each` now returns an `Enumerator` when called without a block, so that it + can be chained with other `Enumerable` methods. + + *Ben Woosley* + +* `ActiveRecord::Result.each` now returns an `Enumerator` when called without + a block, so that it can be chained with other `Enumerable` methods. + + *Ben Woosley* + +* Flatten merged join_values before building the joins. + + While joining_values special treatment is given to string values. + By flattening the array it ensures that string values are detected + as strings and not arrays. + + Fixes #10669. + + *Neeraj Singh and iwiznia* + +* Do not load all child records for inverse case. + + currently `post.comments.find(Comment.first.id)` would load all + comments for the given post to set the inverse association. + + This has a huge performance penalty. Because if post has 100k + records and all these 100k records would be loaded in memory + even though the comment id was supplied. + + Fix is to use in-memory records only if loaded? is true. Otherwise + load the records using full sql. + + Fixes #10509. + + *Neeraj Singh* + +* `inspect` on Active Record model classes does not initiate a + new connection. This means that calling `inspect`, when the + database is missing, will no longer raise an exception. + Fixes #10936. + + Example: + + Author.inspect # => "Author(no database connection)" + + *Yves Senn* + +* Handle single quotes in PostgreSQL default column values. + Fixes #10881. + + *Dylan Markow* + +* Log the sql that is actually sent to the database. + + If I have a query that produces sql + `WHERE "users"."name" = 'a b'` then in the log all the + whitespace is being squeezed. So the sql that is printed in the + log is `WHERE "users"."name" = 'a b'`. + + Do not squeeze whitespace out of sql queries. Fixes #10982. + + *Neeraj Singh* + +* Fixture setup no longer depends on `ActiveRecord::Base.configurations`. + This is relevant when `ENV["DATABASE_URL"]` is used in place of a `database.yml`. + + *Yves Senn* + +* Fix mysql2 adapter raises the correct exception when executing a query on a + closed connection. + + *Yves Senn* + +* Ambiguous reflections are on :through relationships are no longer supported. + For example, you need to change this: + + class Author < ActiveRecord::Base + has_many :posts + has_many :taggings, through: :posts + end + + class Post < ActiveRecord::Base + has_one :tagging + has_many :taggings + end + + class Tagging < ActiveRecord::Base + end + + To this: + + class Author < ActiveRecord::Base + has_many :posts + has_many :taggings, through: :posts, source: :tagging + end + + class Post < ActiveRecord::Base + has_one :tagging + has_many :taggings + end + + class Tagging < ActiveRecord::Base + end + + *Aaron Patterson* + +* Remove column restrictions for `count`, let the database raise if the SQL is + invalid. The previous behavior was untested and surprising for the user. + Fixes #5554. + + Example: + + User.select("name, username").count + # Before => SELECT count(*) FROM users + # After => ActiveRecord::StatementInvalid + + # you can still use `count(:all)` to perform a query unrelated to the + # selected columns + User.select("name, username").count(:all) # => SELECT count(*) FROM users + + *Yves Senn* + +* Rails now automatically detects inverse associations. If you do not set the + `:inverse_of` option on the association, then Active Record will guess the + inverse association based on heuristics. + + Note that automatic inverse detection only works on `has_many`, `has_one`, + and `belongs_to` associations. Extra options on the associations will + also prevent the association's inverse from being found automatically. + + The automatic guessing of the inverse association uses a heuristic based + on the name of the class, so it may not work for all associations, + especially the ones with non-standard names. + + You can turn off the automatic detection of inverse associations by setting + the `:inverse_of` option to `false` like so: + + class Taggable < ActiveRecord::Base + belongs_to :tag, inverse_of: false + end + + *John Wang* + +* Fix `add_column` with `array` option when using PostgreSQL. Fixes #10432. + + *Adam Anderson* + +* Usage of `implicit_readonly` is being removed`. Please use `readonly` method + explicitly to mark records as `readonly. + Fixes #10615. + + Example: + + user = User.joins(:todos).select("users.*, todos.title as todos_title").readonly(true).first + user.todos_title = 'clean pet' + user.save! # will raise error + + *Yves Senn* + +* Fix the `:primary_key` option for `has_many` associations. + Fixes #10693. + + *Yves Senn* + +* Fix bug where tiny types are incorrectly coerced as boolean when the length is more than 1. + + Fixes #10620. + + *Aaron Patterson* + * Also support extensions in PostgreSQL 9.1. This feature has been supported since 9.1. *kennyj* @@ -5,7 +1376,7 @@ * Deprecate `ConnectionAdapters::SchemaStatements#distinct`, as it is no longer used by internals. - *Ben Woosley# + *Ben Woosley* * Fix pending migrations error when loading schema and `ActiveRecord::Base.table_name_prefix` is not blank. @@ -75,8 +1446,8 @@ *Olek Janiszewski* -* fixes bug introduced by #3329. Now, when autosaving associations, - deletions happen before inserts and saves. This prevents a 'duplicate +* fixes bug introduced by #3329. Now, when autosaving associations, + deletions happen before inserts and saves. This prevents a 'duplicate unique value' database error that would occur if a record being created had the same value on a unique indexed field as that of a record being destroyed. |