rails/activerecord/CHANGELOG.md

• Add support for SQLite3 full-text-search and other virtual tables.

  Previously, adding sqlite3 virtual tables messed up schema.rb.

  Now, virtual tables can safely be added using create_virtual_table.

  Zacharias Knudsen

• Support use of alternative database interfaces via the database_cli ActiveRecord configuration option.

  Rails.application.configure do
    config.active_record.database_cli = { postgresql: "pgcli" }
  end
  

  T S Vallender

• Add support for dumping table inheritance and native partitioning table definitions for PostgeSQL adapter

  Justin Talbott

• Infer default :inverse_of option for delegated_type definitions.

  class Entry < ApplicationRecord
    delegated_type :entryable, types: %w[ Message ]
    # => defaults to inverse_of: :entry
  end
  

  Sean Doyle

• Add support for ActiveRecord::Point type casts using Hash values

  This allows ActiveRecord::Point to be cast or serialized from a hash with :x and :y keys of numeric values, mirroring the functionality of existing casts for string and array values. Both string and symbol keys are supported.

  class PostgresqlPoint < ActiveRecord::Base
    attribute :x, :point
    attribute :y, :point
    attribute :z, :point
  end
  
  val = PostgresqlPoint.new({
    x: '(12.34, -43.21)',
    y: [12.34, '-43.21'],
    z: {x: '12.34', y: -43.21}
  })
  ActiveRecord::Point.new(12.32, -43.21) == val.x == val.y == val.z
  

  Stephen Drew

• Replace SQLite3::Database#busy_timeout with #busy_handler_timeout=.

  Provides a non-GVL-blocking, fair retry interval busy handler implementation.

  Stephen Margheim

• SQLite3Adapter: Translate SQLite3::BusyException into ActiveRecord::StatementTimeout.

  Matthew Nguyen

• Include schema name in enable_extension statements in db/schema.rb.

  The schema dumper will now include the schema name in generated enable_extension statements if they differ from the current schema.

  For example, if you have a migration:

  enable_extension "heroku_ext.pgcrypto"
  enable_extension "pg_stat_statements"
  

  then the generated schema dump will also contain:

  enable_extension "heroku_ext.pgcrypto"
  enable_extension "pg_stat_statements"
  

  Tony Novak

• Fix ActiveRecord::Encryption::EncryptedAttributeType#type to return actual cast type.

  Vasiliy Ermolovich

• SQLite3Adapter: Bulk insert fixtures.

  Previously one insert command was executed for each fixture, now they are aggregated in a single bulk insert command.

  Lázaro Nixon

• PostgreSQLAdapter: Allow disable_extension to be called with schema-qualified name.

  For parity with enable_extension, the disable_extension method can be called with a schema-qualified name (e.g. disable_extension "myschema.pgcrypto"). Note that PostgreSQL's DROP EXTENSION does not actually take a schema name (unlike CREATE EXTENSION), so the resulting SQL statement will only name the extension, e.g. DROP EXTENSION IF EXISTS "pgcrypto".

  Tony Novak

• Make create_schema / drop_schema reversible in migrations.

  Previously, create_schema and drop_schema were irreversible migration operations.

  Tony Novak

• Support batching using custom columns.

  Product.in_batches(cursor: [:shop_id, :id]) do |relation|
    # do something with relation
  end
  

  fatkodima

• Use SQLite IMMEDIATE transactions when possible.

  Transactions run against the SQLite3 adapter default to IMMEDIATE mode to improve concurrency support and avoid busy exceptions.

  Stephen Margheim

• Raise specific exception when a connection is not defined.

  The new ConnectionNotDefined exception provides connection name, shard and role accessors indicating the details of the connection that was requested.

  Hana Harencarova, Matthew Draper

• Delete the deprecated constant ActiveRecord::ImmutableRelation.

  Xavier Noria

• Fix duplicate callback execution when child autosaves parent with has_one and belongs_to.

  Before, persisting a new child record with a new associated parent record would run before_validation, after_validation, before_save and after_save callbacks twice.

  Now, these callbacks are only executed once as expected.

  Joshua Young

• ActiveRecord::Encryption::Encryptor now supports a :compressor option to customize the compression algorithm used.

  module ZstdCompressor
    def self.deflate(data)
      Zstd.compress(data)
    end
  
    def self.inflate(data)
      Zstd.decompress(data)
    end
  end
  
  class User
    encrypts :name, compressor: ZstdCompressor
  end
  

  You disable compression by passing compress: false.

  class User
    encrypts :name, compress: false
  end
  

  heka1024

• Add condensed #inspect for ConnectionPool, AbstractAdapter, and DatabaseConfig.

  Hartley McGuire

• Add .shard_keys, .sharded?, & .connected_to_all_shards methods.

  class ShardedBase < ActiveRecord::Base
      self.abstract_class = true
  
      connects_to shards: {
        shard_one: { writing: :shard_one },
        shard_two: { writing: :shard_two }
      }
  end
  
  class ShardedModel < ShardedBase
  end
  
  ShardedModel.shard_keys => [:shard_one, :shard_two]
  ShardedModel.sharded? => true
  ShardedBase.connected_to_all_shards { ShardedModel.current_shard } => [:shard_one, :shard_two]
  

  Nony Dutton

• Add a filter option to in_order_of to prioritize certain values in the sorting without filtering the results by these values.

  Igor Depolli

• Fix an issue where the IDs reader method did not return expected results for preloaded associations in models using composite primary keys.

  Jay Ang

• Allow to configure strict_loading_mode globally or within a model.

  Defaults to :all, can be changed to :n_plus_one_only.

  Garen Torikian

• Add ActiveRecord::Relation#readonly?.

  Reflects if the relation has been marked as readonly.

  Theodor Tonum

• Improve ActiveRecord::Store to raise a descriptive exception if the column is not either structured (e.g., PostgreSQL +hstore+/+json+, or MySQL +json+) or declared serializable via ActiveRecord.store.

  Previously, a NoMethodError would be raised when the accessor was read or written:

  NoMethodError: undefined method `accessor' for an instance of ActiveRecord::Type::Text
  

  Now, a descriptive ConfigurationError is raised:

  ActiveRecord::ConfigurationError: the column 'metadata' has not been configured as a store.
    Please make sure the column is declared serializable via 'ActiveRecord.store' or, if your
    database supports it, use a structured column type like hstore or json.
  

  Mike Dalessio

• Fix inference of association model on nested models with the same demodularized name.

  E.g. with the following setup:

  class Nested::Post < ApplicationRecord
    has_one :post, through: :other
  end
  

  Before, #post would infer the model as Nested::Post, but now it correctly infers Post.

  Joshua Young

• Add public method for checking if a table is ignored by the schema cache.

  Previously, an application would need to reimplement ignored_table? from the schema cache class to check if a table was set to be ignored. This adds a public method to support this and updates the schema cache to use that directly.

  ActiveRecord.schema_cache_ignored_tables = ["developers"]
  ActiveRecord.schema_cache_ignored_table?("developers")
  => true
  

  Eileen M. Uchitelle

Please check 7-2-stable for previous changes.