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CHANGELOG.md

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  • Fixed the performance regression for primary_keys introduced MySQL 8.0.

    Hiroyuki Ishii

  • Add support for belongs_to to has_many inversing.

    Gannon McGibbon

  • Allow length configuration for has_secure_token method. The minimum length is set at 24 characters.

    Before:

    has_secure_token :auth_token

    After:

    has_secure_token :default_token             # 24 characters
has_secure_token :auth_token, length: 36    # 36 characters
has_secure_token :invalid_token, length: 12 # => ActiveRecord::SecureToken::MinimumLengthError

    Bernardo de Araujo

  • Deprecate DatabaseConfigurations#to_h. These connection hashes are still available via ActiveRecord::Base.configurations.configs_for.

    Eileen Uchitelle, John Crepezzi

  • Add DatabaseConfig#configuration_hash to return database configuration hashes with symbol keys, and use all symbol-key configuration hashes internally. Deprecate DatabaseConfig#config which returns a String-keyed Hash with the same values.

    John Crepezzi, Eileen Uchitelle

  • Allow column names to be passed to remove_index positionally along with other options.

    Passing other options can be necessary to make remove_index correctly reversible.

    Before:

    add_index    :reports, :report_id               # => works
add_index    :reports, :report_id, unique: true # => works
remove_index :reports, :report_id               # => works
remove_index :reports, :report_id, unique: true # => ArgumentError

    After:

    remove_index :reports, :report_id, unique: true # => works

    Eugene Kenny

  • Allow bulk ALTER statements to drop and recreate indexes with the same name.

    Eugene Kenny

  • insert, insert_all, upsert, and upsert_all now clear the query cache.

    Eugene Kenny

  • Call while_preventing_writes directly from connected_to.

    In some cases application authors want to use the database switching middleware and make explicit calls with connected_to. It's possible for an app to turn off writes and not turn them back on by the time we call connected_to(role: :writing).

    This change allows apps to fix this by assuming if a role is writing we want to allow writes, except in the case it's explicitly turned off.

    Eileen M. Uchitelle

  • Improve detection of ActiveRecord::StatementTimeout with mysql2 adapter in the edge case when the query is terminated during filesort.

    Kir Shatrov

  • Stop trying to read yaml file fixtures when loading Active Record fixtures.

    Gannon McGibbon

  • Deprecate .reorder(nil) with .first / .first! taking non-deterministic result.

    To continue taking non-deterministic result, use .take / .take! instead.

    Ryuta Kamizono

  • Ensure custom PK types are casted in through reflection queries.

    Gannon McGibbon

  • Preserve user supplied joins order as much as possible.

    Fixes #36761, #34328, #24281, #12953.

    Ryuta Kamizono

  • Allow matches_regex and does_not_match_regexp on the MySQL Arel visitor.

    James Pearson

  • Allow specifying fixtures to be ignored by setting ignore in YAML file's '_fixture' section.

    Tongfei Gao

  • Make the DATABASE_URL env variable only affect the primary connection. Add new env variables for multiple databases.

    John Crepezzi, Eileen Uchitelle

  • Add a warning for enum elements with 'not_' prefix.

    class Foo
  enum status: [:sent, :not_sent]
end

    Edu Depetris

  • Make currency symbols optional for money column type in PostgreSQL

    Joel Schneider

  • Add support for beginless ranges, introduced in Ruby 2.7.

    Josh Goodall

  • Add database_exists? method to connection adapters to check if a database exists.

    Guilherme Mansur

  • Loading the schema for a model that has no table_name raises a TableNotSpecified error.

    Guilherme Mansur, Eugene Kenny

  • PostgreSQL: Fix GROUP BY with ORDER BY virtual count attribute.

    Fixes #36022.

    Ryuta Kamizono

  • Make ActiveRecord ConnectionPool.connections method thread-safe.

    Fixes #36465.

    Jeff Doering

  • Add support for multiple databases to rails db:abort_if_pending_migrations.

    Mark Lee

  • Fix sqlite3 collation parsing when using decimal columns.

    Martin R. Schuster

  • Fix invalid schema when primary key column has a comment.

    Fixes #29966.

    Guilherme Goettems Schneider

  • Fix table comment also being applied to the primary key column.

    Guilherme Goettems Schneider

  • Allow generated create_table migrations to include or skip timestamps.

    Michael Duchemin

Please check 6-0-stable for previous changes.