rails 7.1.0 on Ruby Gems

Active Support

Fix AS::MessagePack with ENV["RAILS_MAX_THREADS"].
Jonathan Hefner

Add a new public API for broadcasting logs

This feature existed for a while but was until now a private API.
Broadcasting log allows to send log message to difference sinks (STDOUT, a file ...) and
is used by default in the development environment to write logs both on STDOUT and in the
"development.log" file.

Basic usage:

stdout_logger = Logger.new(STDOUT)
file_logger = Logger.new("development.log")
broadcast = ActiveSupport::BroadcastLogger.new(stdout_logger, file_logger)

broadcast.info("Hello!") # The "Hello!" message is written on STDOUT and in the log file.

Adding other sink(s) to the broadcast:

broadcast = ActiveSupport::BroadcastLogger.new
broadcast.broadcast_to(Logger.new(STDERR))

Remove a sink from the broadcast:

stdout_logger = Logger.new(STDOUT)
broadcast = ActiveSupport::BroadcastLogger.new(stdout_logger)

broadcast.stop_broadcasting_to(stdout_logger)

Edouard Chin

Fix Range#overlap? not taking empty ranges into account on Ruby < 3.3
Nobuyoshi Nakada, Shouichi Kamiya, Hartley McGuire
Use Ruby 3.3 Range#overlap? if available
Yasuo Honda
Add bigdecimal as Active Support dependency that is a bundled gem candidate for Ruby 3.4.
bigdecimal 3.1.4 or higher version will be installed.
Ruby 2.7 and 3.0 users who want bigdecimal version 2.0.0 or 3.0.0 behavior as a default gem,
pin the bigdecimal version in your application Gemfile.
Koichi ITO
Add drb, mutex_m and base64 that are bundled gem candidates for Ruby 3.4
Yasuo Honda
When using cache format version >= 7.1 or a custom serializer, expired and
version-mismatched cache entries can now be detected without deserializing
their values.
Jonathan Hefner
Make all cache stores return a boolean for #delete
Previously the RedisCacheStore#delete would return 1 if the entry
exists and 0 otherwise. Now it returns true if the entry exists and false
otherwise, just like the other stores.
The FileStore would return nil if the entry doesn't exists and returns
false now as well.
Petrik de Heus

Active Support cache stores now support replacing the default compressor via
a :compressor option. The specified compressor must respond to deflate
and inflate. For example:

module MyCompressor
  def self.deflate(string)
    # compression logic...
  end

  def self.inflate(compressed)
    # decompression logic...
  end
end

config.cache_store = :redis_cache_store, { compressor: MyCompressor }

Jonathan Hefner

Active Support cache stores now support a :serializer option. Similar to
the :coder option, serializers must respond to dump and load. However,
serializers are only responsible for serializing a cached value, whereas
coders are responsible for serializing the entire ActiveSupport::Cache::Entry
instance. Additionally, the output from serializers can be automatically
compressed, whereas coders are responsible for their own compression.
Specifying a serializer instead of a coder also enables performance
optimizations, including the bare string optimization introduced by cache
format version 7.1.
The :serializer and :coder options are mutually exclusive. Specifying
both will raise an ArgumentError.
Jonathan Hefner
Fix ActiveSupport::Inflector.humanize(nil) raising NoMethodError: undefined method `end_with?' for nil:NilClass.
James Robinson

Don't show secrets for ActiveSupport::KeyGenerator#inspect.

Before:

ActiveSupport::KeyGenerator.new(secret).inspect
"#<ActiveSupport::KeyGenerator:0x0000000104888038 ... @secret=\"\\xAF\\bFh]LV}q\\nl\\xB2U\\xB3 ... >"

After:

ActiveSupport::KeyGenerator::Aes256Gcm(secret).inspect
"#<ActiveSupport::KeyGenerator:0x0000000104888038>"

Petrik de Heus

Improve error message when EventedFileUpdateChecker is used without a
compatible version of the Listen gem
Hartley McGuire
Add :report behavior for Deprecation
Setting config.active_support.deprecation = :report uses the error
reporter to report deprecation warnings to ActiveSupport::ErrorReporter.
Deprecations are reported as handled errors, with a severity of :warning.
Useful to report deprecations happening in production to your bug tracker.
Étienne Barrié
Rename Range#overlaps? to #overlap? and add alias for backwards compatibility
Christian Schmidt
Fix EncryptedConfiguration returning incorrect values for some Hash
methods
Hartley McGuire

Don't show secrets for MessageEncryptor#inspect.

Before:

ActiveSupport::MessageEncryptor.new(secret, cipher: "aes-256-gcm").inspect
"#<ActiveSupport::MessageEncryptor:0x0000000104888038 ... @secret=\"\\xAF\\bFh]LV}q\\nl\\xB2U\\xB3 ... >"

After:

ActiveSupport::MessageEncryptor.new(secret, cipher: "aes-256-gcm").inspect
"#<ActiveSupport::MessageEncryptor:0x0000000104888038>"

Petrik de Heus

Don't show contents for EncryptedConfiguration#inspect.

Before:

Rails.application.credentials.inspect
"#<ActiveSupport::EncryptedConfiguration:0x000000010d2b38e8 ... @config={:secret=>\"something secret\"} ... @key_file_contents=\"915e4ea054e011022398dc242\" ...>"

After:

Rails.application.credentials.inspect
"#<ActiveSupport::EncryptedConfiguration:0x000000010d2b38e8>"

Petrik de Heus

ERB::Util.html_escape_once always returns an html_safe string.
This method previously maintained the html_safe? property of a string on the return
value. Because this string has been escaped, however, not marking it as html_safe causes
entities to be double-escaped.
As an example, take this view snippet:
```
<p><%= html_escape_once("this & that &amp; the other") %></p>
```
Before this change, that would be double-escaped and render as:
```
<p>this &amp;amp; that &amp;amp; the other</p>
```
After this change, it renders correctly as:
```
<p>this &amp; that &amp; the other</p>
```
Fixes #48256
Mike Dalessio
Deprecate SafeBuffer#clone_empty.
This method has not been used internally since Rails 4.2.0.
Mike Dalessio
MessageEncryptor, MessageVerifier, and config.active_support.message_serializer
now accept :message_pack and :message_pack_allow_marshal as serializers.
These serializers require the msgpack gem
(>= 1.7.0).
The Message Pack format can provide improved performance and smaller payload
sizes. It also supports round-tripping some Ruby types that are not supported
by JSON. For example:
```
verifier = ActiveSupport::MessageVerifier.new("secret")
data = [{ a: 1 }, { b: 2 }.with_indifferent_access, 1.to_d, Time.at(0, 123)]
message = verifier.generate(data)

# BEFORE with config.active_support.message_serializer = :json
verifier.verified(message)
# => [{"a"=>1}, {"b"=>2}, "1.0", "1969-12-31T18:00:00.000-06:00"]
verifier.verified(message).map(&:class)
# => [Hash, Hash, String, String]

# AFTER with config.active_support.message_serializer = :message_pack
verifier.verified(message)
# => [{:a=>1}, {"b"=>2}, 0.1e1, 1969-12-31 18:00:00.000123 -0600]
verifier.verified(message).map(&:class)
# => [Hash, ActiveSupport::HashWithIndifferentAccess, BigDecimal, Time]
```
The :message_pack serializer can fall back to deserializing with
ActiveSupport::JSON when necessary, and the :message_pack_allow_marshal
serializer can fall back to deserializing with Marshal as well as
ActiveSupport::JSON. Additionally, the :marshal, :json, and
:json_allow_marshal serializers can now fall back to deserializing with
ActiveSupport::MessagePack when necessary. These behaviors ensure old
messages can still be read so that migration is easier.
Jonathan Hefner
A new 7.1 cache format is available which includes an optimization for
bare string values such as view fragments.
The 7.1 cache format is used by default for new apps, and existing apps
can enable the format by setting config.load_defaults 7.1 or by setting
config.active_support.cache_format_version = 7.1 in config/application.rb
or a config/environments/*.rb file.
Cache entries written using the 6.1 or 7.0 cache formats can be read
when using the 7.1 format. To perform a rolling deploy of a Rails 7.1
upgrade, wherein servers that have not yet been upgraded must be able to
read caches from upgraded servers, leave the cache format unchanged on the
first deploy, then enable the 7.1 cache format on a subsequent deploy.
Jonathan Hefner
Active Support cache stores can now use a preconfigured serializer based on
ActiveSupport::MessagePack via the :serializer option:
```
config.cache_store = :redis_cache_store, { serializer: :message_pack }
```
The :message_pack serializer can reduce cache entry sizes and improve
performance, but requires the msgpack gem
(>= 1.7.0).
The :message_pack serializer can read cache entries written by the default
serializer, and the default serializer can now read entries written by the
:message_pack serializer. These behaviors make it easy to migrate between
serializer without invalidating the entire cache.
Jonathan Hefner

Object#deep_dup no longer duplicate named classes and modules.

Before:

hash = { class: Object, module: Kernel }
hash.deep_dup # => {:class=>#<Class:0x00000001063ffc80>, :module=>#<Module:0x00000001063ffa00>}

After:

hash = { class: Object, module: Kernel }
hash.deep_dup # => {:class=>Object, :module=>Kernel}

Jean Boussier

Consistently raise an ArgumentError if the ActiveSupport::Cache key is blank.
Joshua Young
Deprecate usage of the singleton ActiveSupport::Deprecation.
All usage of ActiveSupport::Deprecation as a singleton is deprecated, the most common one being
ActiveSupport::Deprecation.warn. Gem authors should now create their own deprecator (ActiveSupport::Deprecation
object), and use it to emit deprecation warnings.
Calling any of the following without specifying a deprecator argument is also deprecated:
- Module.deprecate
- deprecate_constant
- DeprecatedObjectProxy
- DeprecatedInstanceVariableProxy
- DeprecatedConstantProxy
- deprecation-related test assertions
Use of ActiveSupport::Deprecation.silence and configuration methods like behavior=, disallowed_behavior=,
disallowed_warnings= should now be aimed at the application's deprecators.
```
Rails.application.deprecators.silence do
  # code that emits deprecation warnings
end
```
If your gem has a Railtie or Engine, it's encouraged to add your deprecator to the application's deprecators, that
way the deprecation related configuration options will apply to it as well, e.g.
config.active_support.report_deprecations set to false in the production environment will also disable your
deprecator.
```
initializer "my_gem.deprecator" do |app|
  app.deprecators[:my_gem] = MyGem.deprecator
end
```
Étienne Barrié

Add Object#with to set and restore public attributes around a block

client.timeout # => 5
client.with(timeout: 1) do
  client.timeout # => 1
end
client.timeout # => 5

Jean Boussier

Remove deprecated support to generate incorrect RFC 4122 UUIDs when providing a namespace ID that is not one of the
constants defined on Digest::UUID.
Rafael Mendonça França
Deprecate config.active_support.use_rfc4122_namespaced_uuids.
Rafael Mendonça França
Remove implicit conversion of objects into String by ActiveSupport::SafeBuffer.
Rafael Mendonça França
Remove deprecated active_support/core_ext/range/include_time_with_zone file.
Rafael Mendonça França
Deprecate config.active_support.remove_deprecated_time_with_zone_name.
Rafael Mendonça França
Remove deprecated override of ActiveSupport::TimeWithZone.name.
Rafael Mendonça França
Deprecate config.active_support.disable_to_s_conversion.
Rafael Mendonça França
Remove deprecated option to passing a format to #to_s in Array, Range, Date, DateTime, Time,
BigDecimal, Float and, Integer.
Rafael Mendonça França
Remove deprecated ActiveSupport::PerThreadRegistry.
Rafael Mendonça França
Remove deprecated override of Enumerable#sum.
Rafael Mendonça França
Deprecated initializing a ActiveSupport::Cache::MemCacheStore with an instance of Dalli::Client.
Deprecate the undocumented option of providing an already-initialized instance of Dalli::Client to ActiveSupport::Cache::MemCacheStore. Such clients could be configured with unrecognized options, which could lead to unexpected behavior. Instead, provide addresses as documented.
aledustet

Stub Time.new() in TimeHelpers#travel_to

travel_to Time.new(2004, 11, 24) do
  # Inside the `travel_to` block `Time.new` is stubbed
  assert_equal 2004, Time.new.year
end

fatkodima

Raise ActiveSupport::MessageEncryptor::InvalidMessage from
ActiveSupport::MessageEncryptor#decrypt_and_verify regardless of cipher.
Previously, when a MessageEncryptor was using a non-AEAD cipher such as
AES-256-CBC, a corrupt or tampered message would raise
ActiveSupport::MessageVerifier::InvalidSignature. Now, all ciphers raise
the same error:

encryptor = ActiveSupport::MessageEncryptor.new("x" * 32, cipher: "aes-256-gcm")
message = encryptor.encrypt_and_sign("message")
encryptor.decrypt_and_verify(message.next)
# => raises ActiveSupport::MessageEncryptor::InvalidMessage

encryptor = ActiveSupport::MessageEncryptor.new("x" * 32, cipher: "aes-256-cbc")
message = encryptor.encrypt_and_sign("message")
encryptor.decrypt_and_verify(message.next)
# BEFORE:
# => raises ActiveSupport::MessageVerifier::InvalidSignature
# AFTER:
# => raises ActiveSupport::MessageEncryptor::InvalidMessage

Jonathan Hefner

Support nil original values when using ActiveSupport::MessageVerifier#verify.
Previously, MessageVerifier#verify did not work with nil original
values, though both MessageVerifier#verified and
MessageEncryptor#decrypt_and_verify do:

encryptor = ActiveSupport::MessageEncryptor.new(secret)
message = encryptor.encrypt_and_sign(nil)

encryptor.decrypt_and_verify(message)
# => nil

verifier = ActiveSupport::MessageVerifier.new(secret)
message = verifier.generate(nil)

verifier.verified(message)
# => nil

verifier.verify(message)
# BEFORE:
# => raises ActiveSupport::MessageVerifier::InvalidSignature
# AFTER:
# => nil

Jonathan Hefner

Maintain html_safe? on html_safe strings when sliced with slice, slice!, or chr method.
Previously, html_safe? was only maintained when the html_safe strings were sliced
with [] method. Now, slice, slice!, and chr methods will maintain html_safe? like [] method.
```
string = "<div>test</div>".html_safe
string.slice(0, 1).html_safe? # => true
string.slice!(0, 1).html_safe? # => true
# maintain html_safe? after the slice!
string.html_safe? # => true
string.chr.html_safe? # => true
```
Michael Go

Add Object#in? support for open ranges.

assert Date.today.in?(..Date.tomorrow)
assert_not Date.today.in?(Date.tomorrow..)

Ignacio Galindo

config.i18n.raise_on_missing_translations = true now raises on any missing translation.
Previously it would only raise when called in a view or controller. Now it will raise
anytime I18n.t is provided an unrecognised key.
If you do not want this behaviour, you can customise the i18n exception handler. See the
upgrading guide or i18n guide for more information.
Alex Ghiculescu
ActiveSupport::CurrentAttributes now raises if a restricted attribute name is used.
Attributes such as set and reset cannot be used as they clash with the
CurrentAttributes public API.
Alex Ghiculescu
HashWithIndifferentAccess#transform_keys now takes a Hash argument, just
as Ruby's Hash#transform_keys does.
Akira Matsuda

delegate now defines method with proper arity when delegating to a Class.
With this change, it defines faster method (3.5x faster with no argument).
However, in order to gain this benefit, the delegation target method has to
be defined before declaring the delegation.

# This defines 3.5 times faster method than before
class C
  def self.x() end
  delegate :x, to: :class
end

class C
  # This works but silently falls back to old behavior because
  # `delegate` cannot find the definition of `x`
  delegate :x, to: :class
  def self.x() end
end

Akira Matsuda

assert_difference message now includes what changed.

This makes it easier to debug non-obvious failures.

Before:

"User.count" didn't change by 32.
Expected: 1611
  Actual: 1579

After:

"User.count" didn't change by 32, but by 0.
Expected: 1611
  Actual: 1579

Alex Ghiculescu

Add ability to match exception messages to assert_raises assertion

Instead of this

error = assert_raises(ArgumentError) do
  perform_service(param: 'exception')
end
assert_match(/incorrect param/i, error.message)

you can now write this

assert_raises(ArgumentError, match: /incorrect param/i) do
  perform_service(param: 'exception')
end

fatkodima

Add Rails.env.local? shorthand for Rails.env.development? || Rails.env.test?.
DHH
ActiveSupport::Testing::TimeHelpers now accepts named with_usec argument
to freeze_time, travel, and travel_to methods. Passing true prevents
truncating the destination time with change(usec: 0).
KevSlashNull, and serprex
ActiveSupport::CurrentAttributes.resets now accepts a method name
The block API is still the recommended approach, but now both APIs are supported:
```
class Current < ActiveSupport::CurrentAttributes
  resets { Time.zone = nil }
  resets :clear_time_zone
end
```
Alex Ghiculescu
Ensure ActiveSupport::Testing::Isolation::Forking closes pipes
Previously, Forking.run_in_isolation opened two ends of a pipe. The fork
process closed the read end, wrote to it, and then terminated (which
presumably closed the file descriptors on its end). The parent process
closed the write end, read from it, and returned, never closing the read
end.
This resulted in an accumulation of open file descriptors, which could
cause errors if the limit is reached.
Sam Bostock

Fix Time#change and Time#advance for times around the end of Daylight
Saving Time.

Previously, when Time#change or Time#advance constructed a time inside
the final stretch of Daylight Saving Time (DST), the non-DST offset would
always be chosen for local times:

# DST ended just before 2021-11-07 2:00:00 AM in US/Eastern.
ENV["TZ"] = "US/Eastern"

time = Time.local(2021, 11, 07, 00, 59, 59) + 1
# => 2021-11-07 01:00:00 -0400
time.change(day: 07)
# => 2021-11-07 01:00:00 -0500
time.advance(seconds: 0)
# => 2021-11-07 01:00:00 -0500

time = Time.local(2021, 11, 06, 01, 00, 00)
# => 2021-11-06 01:00:00 -0400
time.change(day: 07)
# => 2021-11-07 01:00:00 -0500
time.advance(days: 1)
# => 2021-11-07 01:00:00 -0500

And the DST offset would always be chosen for times with a TimeZone
object:

Time.zone = "US/Eastern"

time = Time.new(2021, 11, 07, 02, 00, 00, Time.zone) - 3600
# => 2021-11-07 01:00:00 -0500
time.change(day: 07)
# => 2021-11-07 01:00:00 -0400
time.advance(seconds: 0)
# => 2021-11-07 01:00:00 -0400

time = Time.new(2021, 11, 8, 01, 00, 00, Time.zone)
# => 2021-11-08 01:00:00 -0500
time.change(day: 07)
# => 2021-11-07 01:00:00 -0400
time.advance(days: -1)
# => 2021-11-07 01:00:00 -0400

Now, Time#change and Time#advance will choose the offset that matches
the original time's offset when possible:

ENV["TZ"] = "US/Eastern"

time = Time.local(2021, 11, 07, 00, 59, 59) + 1
# => 2021-11-07 01:00:00 -0400
time.change(day: 07)
# => 2021-11-07 01:00:00 -0400
time.advance(seconds: 0)
# => 2021-11-07 01:00:00 -0400

time = Time.local(2021, 11, 06, 01, 00, 00)
# => 2021-11-06 01:00:00 -0400
time.change(day: 07)
# => 2021-11-07 01:00:00 -0400
time.advance(days: 1)
# => 2021-11-07 01:00:00 -0400

Time.zone = "US/Eastern"

time = Time.new(2021, 11, 07, 02, 00, 00, Time.zone) - 3600
# => 2021-11-07 01:00:00 -0500
time.change(day: 07)
# => 2021-11-07 01:00:00 -0500
time.advance(seconds: 0)
# => 2021-11-07 01:00:00 -0500

time = Time.new(2021, 11, 8, 01, 00, 00, Time.zone)
# => 2021-11-08 01:00:00 -0500
time.change(day: 07)
# => 2021-11-07 01:00:00 -0500
time.advance(days: -1)
# => 2021-11-07 01:00:00 -0500

Kevin Hall, Takayoshi Nishida, and Jonathan Hefner

Fix MemoryStore to preserve entries TTL when incrementing or decrementing
This is to be more consistent with how MemCachedStore and RedisCacheStore behaves.
Jean Boussier

Rails.error.handle and Rails.error.record filter now by multiple error classes.

Rails.error.handle(IOError, ArgumentError) do
  1 + '1' # raises TypeError
end
1 + 1 # TypeErrors are not IOErrors or ArgumentError, so this will *not* be handled

Martin Spickermann

Class#subclasses and Class#descendants now automatically filter reloaded classes.
Previously they could return old implementations of reloadable classes that have been
dereferenced but not yet garbage collected.
They now automatically filter such classes like DescendantTracker#subclasses and
DescendantTracker#descendants.
Jean Boussier
Rails.error.report now marks errors as reported to avoid reporting them twice.
In some cases, users might want to report errors explicitly with some extra context
before letting it bubble up.
This also allows to safely catch and report errors outside of the execution context.
Jean Boussier

Add assert_error_reported and assert_no_error_reported

Allows to easily asserts an error happened but was handled

report = assert_error_reported(IOError) do
  # ...
end
assert_equal "Oops", report.error.message
assert_equal "admin", report.context[:section]
assert_equal :warning, report.severity
assert_predicate report, :handled?

Jean Boussier

ActiveSupport::Deprecation behavior callbacks can now receive the
deprecator instance as an argument. This makes it easier for such callbacks
to change their behavior based on the deprecator's state. For example,
based on the deprecator's debug flag.
3-arity and splat-args callbacks such as the following will now be passed
the deprecator instance as their third argument:
- ->(message, callstack, deprecator) { ... }
- ->(*args) { ... }
- ->(message, *other_args) { ... }
2-arity and 4-arity callbacks such as the following will continue to behave
the same as before:
- ->(message, callstack) { ... }
- ->(message, callstack, deprecation_horizon, gem_name) { ... }
- ->(message, callstack, *deprecation_details) { ... }
Jonathan Hefner

ActiveSupport::Deprecation#disallowed_warnings now affects the instance on
which it is configured.

This means that individual ActiveSupport::Deprecation instances can be
configured with their own disallowed warnings, and the global
ActiveSupport::Deprecation.disallowed_warnings now only affects the global
ActiveSupport::Deprecation.warn.

Before

ActiveSupport::Deprecation.disallowed_warnings = ["foo"]
deprecator = ActiveSupport::Deprecation.new("2.0", "MyCoolGem")
deprecator.disallowed_warnings = ["bar"]

ActiveSupport::Deprecation.warn("foo") # => raise ActiveSupport::DeprecationException
ActiveSupport::Deprecation.warn("bar") # => print "DEPRECATION WARNING: bar"
deprecator.warn("foo")                 # => raise ActiveSupport::DeprecationException
deprecator.warn("bar")                 # => print "DEPRECATION WARNING: bar"

After

ActiveSupport::Deprecation.disallowed_warnings = ["foo"]
deprecator = ActiveSupport::Deprecation.new("2.0", "MyCoolGem")
deprecator.disallowed_warnings = ["bar"]

ActiveSupport::Deprecation.warn("foo") # => raise ActiveSupport::DeprecationException
ActiveSupport::Deprecation.warn("bar") # => print "DEPRECATION WARNING: bar"
deprecator.warn("foo")                 # => print "DEPRECATION WARNING: foo"
deprecator.warn("bar")                 # => raise ActiveSupport::DeprecationException

Note that global ActiveSupport::Deprecation methods such as ActiveSupport::Deprecation.warn
and ActiveSupport::Deprecation.disallowed_warnings have been deprecated.

Jonathan Hefner

Add italic and underline support to ActiveSupport::LogSubscriber#color
Previously, only bold text was supported via a positional argument.
This allows for bold, italic, and underline options to be specified
for colored logs.
```
info color("Hello world!", :red, bold: true, underline: true)
```
Gannon McGibbon
Add String#downcase_first method.
This method is the corollary of String#upcase_first.
Mark Schneider
thread_mattr_accessor will call .dup.freeze on non-frozen default values.
This provides a basic level of protection against different threads trying
to mutate a shared default object.
Jonathan Hefner
Add raise_on_invalid_cache_expiration_time config to ActiveSupport::Cache::Store
Specifies if an ArgumentError should be raised if Rails.cache fetch or
write are given an invalid expires_at or expires_in time.
Options are true, and false. If false, the exception will be reported
as handled and logged instead. Defaults to true if config.load_defaults >= 7.1.
Trevor Turk

ActiveSupport::Cache:Store#fetch now passes an options accessor to the block.

It makes possible to override cache options:

Rails.cache.fetch("3rd-party-token") do |name, options|
  token = fetch_token_from_remote
  # set cache's TTL to match token's TTL
  options.expires_in = token.expires_in
  token
end

Andrii Gladkyi, Jean Boussier

default option of thread_mattr_accessor now applies through inheritance and
also across new threads.
Previously, the default value provided was set only at the moment of defining
the attribute writer, which would cause the attribute to be uninitialized in
descendants and in other threads.
Fixes #43312.
Thierry Deo
Redis cache store is now compatible with redis-rb 5.0.
Jean Boussier
Add skip_nil: support to ActiveSupport::Cache::Store#fetch_multi.
Daniel Alfaro
Add quarter method to date/time
Matt Swanson
Fix NoMethodError on custom ActiveSupport::Deprecation behavior.
ActiveSupport::Deprecation.behavior= was supposed to accept any object
that responds to call, but in fact its internal implementation assumed that
this object could respond to arity, so it was restricted to only Proc objects.
This change removes this arity restriction of custom behaviors.
Ryo Nakamura
Support :url_safe option for MessageEncryptor.
The MessageEncryptor constructor now accepts a :url_safe option, similar
to the MessageVerifier constructor. When enabled, this option ensures
that messages use a URL-safe encoding.
Jonathan Hefner
Add url_safe option to ActiveSupport::MessageVerifier initializer
ActiveSupport::MessageVerifier.new now takes optional url_safe argument.
It can generate URL-safe strings by passing url_safe: true.
```
verifier = ActiveSupport::MessageVerifier.new(url_safe: true)
message = verifier.generate(data) # => URL-safe string
```
This option is false by default to be backwards compatible.
Shouichi Kamiya
Enable connection pooling by default for MemCacheStore and RedisCacheStore.
If you want to disable connection pooling, set :pool option to false when configuring the cache store:
```
config.cache_store = :mem_cache_store, "cache.example.com", pool: false
```
fatkodima
Add force: support to ActiveSupport::Cache::Store#fetch_multi.
fatkodima
Deprecated :pool_size and :pool_timeout options for configuring connection pooling in cache stores.
Use pool: true to enable pooling with default settings:
```
config.cache_store = :redis_cache_store, pool: true
```
Or pass individual options via :pool option:
```
config.cache_store = :redis_cache_store, pool: { size: 10, timeout: 2 }
```
fatkodima
Allow #increment and #decrement methods of ActiveSupport::Cache::Store
subclasses to set new values.
Previously incrementing or decrementing an unset key would fail and return
nil. A default will now be assumed and the key will be created.
Andrej Blagojević, Eugene Kenny
Add skip_nil: support to RedisCacheStore
Joey Paris
ActiveSupport::Cache::MemoryStore#write(name, val, unless_exist:true) now
correctly writes expired keys.
Alan Savage
ActiveSupport::ErrorReporter now accepts and forward a source: parameter.
This allow libraries to signal the origin of the errors, and reporters
to easily ignore some sources.
Jean Boussier
Fix and add protections for XSS in ActionView::Helpers and ERB::Util.
Add the method ERB::Util.xml_name_escape to escape dangerous characters
in names of tags and names of attributes, following the specification of XML.
Álvaro Martín Fraguas
Respect ActiveSupport::Logger.new's :formatter keyword argument
The stdlib Logger::new allows passing a :formatter keyword argument to
set the logger's formatter. Previously ActiveSupport::Logger.new ignored
that argument by always setting the formatter to an instance of
ActiveSupport::Logger::SimpleFormatter.
Steven Harman
Deprecate preserving the pre-Ruby 2.4 behavior of to_time
With Ruby 2.4+ the default for +to_time+ changed from converting to the
local system time to preserving the offset of the receiver. At the time Rails
supported older versions of Ruby so a compatibility layer was added to assist
in the migration process. From Rails 5.0 new applications have defaulted to
the Ruby 2.4+ behavior and since Rails 7.0 now only supports Ruby 2.7+
this compatibility layer can be safely removed.
To minimize any noise generated the deprecation warning only appears when the
setting is configured to false as that is the only scenario where the
removal of the compatibility layer has any effect.
Andrew White
Pathname.blank? only returns true for Pathname.new("")
Previously it would end up calling Pathname#empty? which returned true
if the path existed and was an empty directory or file.
That behavior was unlikely to be expected.
Jean Boussier
Deprecate Notification::Event's #children and #parent_of?
John Hawthorn
Change the default serializer of ActiveSupport::MessageVerifier from
Marshal to ActiveSupport::JSON when using config.load_defaults 7.1.
Messages serialized with Marshal can still be read, but new messages will
be serialized with ActiveSupport::JSON. For more information, see
https://guides.rubyonrails.org/v7.1/configuring.html#config-active-support-message-serializer.
Saba Kiaei, David Buckley, and Jonathan Hefner
Change the default serializer of ActiveSupport::MessageEncryptor from
Marshal to ActiveSupport::JSON when using config.load_defaults 7.1.
Messages serialized with Marshal can still be read, but new messages will
be serialized with ActiveSupport::JSON. For more information, see
https://guides.rubyonrails.org/v7.1/configuring.html#config-active-support-message-serializer.
Zack Deveau, Martin Gingras, and Jonathan Hefner
Add ActiveSupport::TestCase#stub_const to stub a constant for the duration of a yield.
DHH
Fix ActiveSupport::EncryptedConfiguration to be compatible with Psych 4
Stephen Sugden
Improve File.atomic_write error handling
Daniel Pepper
Fix Class#descendants and DescendantsTracker#descendants compatibility with Ruby 3.1.
The native Class#descendants was reverted prior to Ruby 3.1 release,
but Class#subclasses was kept, breaking the feature detection.
Jean Boussier

Active Model

Remove change in the typography of user facing error messages.
For example, “can’t be blank” is again “can't be blank”.
Rafael Mendonça França
Support composite identifiers in to_key
to_key avoids wrapping #id value into an Array if #id already an array
Nikita Vasilevsky
Add ActiveModel::Conversion.param_delimiter to configure delimiter being used in to_param
Nikita Vasilevsky
undefine_attribute_methods undefines alias attribute methods along with attribute methods.
Nikita Vasilevsky
Error.full_message now strips ":base" from the message.
zzak
Add a load hook for ActiveModel::Model (named active_model) to match the load hook for
ActiveRecord::Base and allow for overriding aspects of the ActiveModel::Model class.
Lewis Buckley
Improve password length validation in ActiveModel::SecurePassword to consider byte size for BCrypt
compatibility.
The previous password length validation only considered the character count, which may not
accurately reflect the 72-byte size limit imposed by BCrypt. This change updates the validation
to consider both character count and byte size while keeping the character length validation in place.
```
user = User.new(password: "a" * 73)  # 73 characters
user.valid? # => false
user.errors[:password] # => ["is too long"]


user = User.new(password: "あ" * 25)  # 25 characters, 75 bytes
user.valid? # => false
user.errors[:password] # => ["is too long"]
```
ChatGPT, Guillermo Iguaran
has_secure_password now generates an #{attribute}_salt method that returns the salt
used to compute the password digest. The salt will change whenever the password is changed,
so it can be used to create single-use password reset tokens with generates_token_for:
```
class User < ActiveRecord::Base
  has_secure_password

  generates_token_for :password_reset, expires_in: 15.minutes do
    password_salt&.last(10)
  end
end
```
Lázaro Nixon
Improve typography of user facing error messages. In English contractions,
the Unicode APOSTROPHE (U+0027) is now RIGHT SINGLE QUOTATION MARK
(U+2019). For example, "can't be blank" is now "can’t be blank".
Jon Dufresne
Add class to ActiveModel::MissingAttributeError error message.
Show which class is missing the attribute in the error message:
```
user = User.first
user.pets.select(:id).first.user_id
# => ActiveModel::MissingAttributeError: missing attribute 'user_id' for Pet
```
Petrik de Heus
Raise NoMethodError in ActiveModel::Type::Value#as_json to avoid unpredictable
results.
Vasiliy Ermolovich
Custom attribute types that inherit from Active Model built-in types and do
not override the serialize method will now benefit from an optimization
when serializing attribute values for the database.
For example, with a custom type like the following:
```
class DowncasedString < ActiveModel::Type::String
  def cast(value)
    super&.downcase
  end
end

ActiveRecord::Type.register(:downcased_string, DowncasedString)

class User < ActiveRecord::Base
  attribute :email, :downcased_string
end

user = User.new(email: "FooBar@example.com")
```
Serializing the email attribute for the database will be roughly twice as
fast. More expensive cast operations will likely see greater improvements.
Jonathan Hefner
has_secure_password now supports password challenges via a
password_challenge accessor and validation.
A password challenge is a safeguard to verify that the current user is
actually the password owner. It can be used when changing sensitive model
fields, such as the password itself. It is different than a password
confirmation, which is used to prevent password typos.
When password_challenge is set, the validation checks that the value's
digest matches the currently persisted password_digest (i.e.
password_digest_was).
This allows a password challenge to be done as part of a typical update
call, just like a password confirmation. It also allows a password
challenge error to be handled in the same way as other validation errors.
For example, in the controller, instead of:
```
password_params = params.require(:password).permit(
  :password_challenge,
  :password,
  :password_confirmation,
)

password_challenge = password_params.delete(:password_challenge)
@password_challenge_failed = !current_user.authenticate(password_challenge)

if !@password_challenge_failed && current_user.update(password_params)
  # ...
end
```
You can now write:
```
password_params = params.require(:password).permit(
  :password_challenge,
  :password,
  :password_confirmation,
).with_defaults(password_challenge: "")

if current_user.update(password_params)
  # ...
end
```
And, in the view, instead of checking @password_challenge_failed, you can
render an error for the password_challenge field just as you would for
other form fields, including utilizing config.action_view.field_error_proc.
Jonathan Hefner
Support infinite ranges for LengthValidators :in/:within options
```
validates_length_of :first_name, in: ..30
```
fatkodima

Add support for beginless ranges to inclusivity/exclusivity validators:

validates_inclusion_of :birth_date, in: -> { (..Date.today) }

validates_exclusion_of :birth_date, in: -> { (..Date.today) }

Bo Jeanes

Make validators accept lambdas without record argument

# Before
validates_comparison_of :birth_date, less_than_or_equal_to: ->(_record) { Date.today }

# After
validates_comparison_of :birth_date, less_than_or_equal_to: -> { Date.today }

fatkodima

Fix casting long strings to Date, Time or DateTime
fatkodima
Use different cache namespace for proxy calls
Models can currently have different attribute bodies for the same method
names, leading to conflicts. Adding a new namespace :active_model_proxy
fixes the issue.
Chris Salzberg

Active Record

Remove -shm and -wal SQLite files when rails db:drop is run.
Niklas Häusele
Revert the change to raise an ArgumentError when #accepts_nested_attributes_for is declared more than once for
an association in the same class.
The reverted behavior broke the case where the #accepts_nested_attributes_for was defined in a concern and
where overridden in the class that included the concern.
Rafael Mendonça França

Better naming for unique constraints support.

Naming unique keys leads to misunderstanding it's a short-hand of unique indexes.
Just naming it unique constraints is not misleading.

In Rails 7.1.0.beta1 or before:

add_unique_key :sections, [:position], deferrable: :deferred, name: "unique_section_position"
remove_unique_key :sections, name: "unique_section_position"

Now:

add_unique_constraint :sections, [:position], deferrable: :deferred, name: "unique_section_position"
remove_unique_constraint :sections, name: "unique_section_position"

Ryuta Kamizono

Fix duplicate quoting for check constraint expressions in schema dump when using MySQL
A check constraint with an expression, that already contains quotes, lead to an invalid schema
dump with the mysql2 adapter.
Fixes #42424.
Felix Tscheulin
Performance tune the SQLite3 adapter connection configuration
For Rails applications, the Write-Ahead-Log in normal syncing mode with a capped journal size, a healthy shared memory buffer and a shared cache will perform, on average, 2× better.
Stephen Margheim
Allow SQLite3 busy_handler to be configured with simple max number of retries
Retrying busy connections without delay is a preferred practice for performance-sensitive applications. Add support for a database.yml retries integer, which is used in a simple busy_handler function to retry busy connections without exponential backoff up to the max number of retries.
Stephen Margheim
The SQLite3 adapter now supports supports_insert_returning?
Implementing the full supports_insert_returning? contract means the SQLite3 adapter supports auto-populated columns (#48241) as well as custom primary keys.
Stephen Margheim
Ensure the SQLite3 adapter handles default functions with the || concatenation operator
Previously, this default function would produce the static string "'Ruby ' || 'on ' || 'Rails'".
Now, the adapter will appropriately receive and use "Ruby on Rails".
```
change_column_default "test_models", "ruby_on_rails", -> { "('Ruby ' || 'on ' || 'Rails')" }
```
Stephen Margheim
Dump PostgreSQL schemas as part of the schema dump.
Lachlan Sylvester
Encryption now supports support_unencrypted_data being set per-attribute.
You can now opt out of support_unencrypted_data on a specific encrypted attribute.
This only has an effect if ActiveRecord::Encryption.config.support_unencrypted_data == true.
```
class User < ActiveRecord::Base
  encrypts :name, deterministic: true, support_unencrypted_data: false
  encrypts :email, deterministic: true
end
```
Alex Ghiculescu
Add instrumentation for Active Record transactions
Allows subscribing to transaction events for tracking/instrumentation. The event payload contains the connection and the outcome (commit, rollback, restart, incomplete), as well as timing details.
```
ActiveSupport::Notifications.subscribe("transaction.active_record") do |event|
  puts "Transaction event occurred!"
  connection = event.payload[:connection]
  puts "Connection: #{connection.inspect}"
end
```
Daniel Colson, Ian Candy

Support composite foreign keys via migration helpers.

# Assuming "carts" table has "(shop_id, user_id)" as a primary key.

add_foreign_key(:orders, :carts, primary_key: [:shop_id, :user_id])

remove_foreign_key(:orders, :carts, primary_key: [:shop_id, :user_id])
foreign_key_exists?(:orders, :carts, primary_key: [:shop_id, :user_id])

fatkodima

Adds support for if_not_exists when adding a check constraint.

add_check_constraint :posts, "post_type IN ('blog', 'comment', 'share')", if_not_exists: true

Cody Cutrer

Raise an ArgumentError when #accepts_nested_attributes_for is declared more than once for an association in
the same class. Previously, the last declaration would silently override the previous one. Overriding in a subclass
is still allowed.
Joshua Young
Deprecate rewhere argument on #merge.
The rewhere argument on #mergeis deprecated without replacement and
will be removed in Rails 7.2.
Adam Hess

Fix unscope is not working in specific case

Before:

Post.where(id: 1...3).unscope(where: :id).to_sql # "SELECT `posts`.* FROM `posts` WHERE `posts`.`id` >= 1 AND `posts`.`id` < 3"

After:

Post.where(id: 1...3).unscope(where: :id).to_sql # "SELECT `posts`.* FROM `posts`"

Fixes #48094.

Kazuya Hatanaka

Change has_secure_token default to on: :initialize
Change the new default value from on: :create to on: :initialize
Can be controlled by the config.active_record.generate_secure_token_on
configuration:
```
config.active_record.generate_secure_token_on = :create
```
Sean Doyle
Fix change_column not setting precision: 6 on datetime columns when
using 7.0+ Migrations and SQLite.
Hartley McGuire
Support composite identifiers in to_key
to_key avoids wrapping #id value into an Array if #id already an array
Nikita Vasilevsky

Add validation option for enum

class Contract < ApplicationRecord
  enum :status, %w[in_progress completed], validate: true
end
Contract.new(status: "unknown").valid? # => false
Contract.new(status: nil).valid? # => false
Contract.new(status: "completed").valid? # => true

class Contract < ApplicationRecord
  enum :status, %w[in_progress completed], validate: { allow_nil: true }
end
Contract.new(status: "unknown").valid? # => false
Contract.new(status: nil).valid? # => true
Contract.new(status: "completed").valid? # => true

Edem Topuzov, Ryuta Kamizono

Allow batching methods to use already loaded relation if available
Calling batch methods on already loaded relations will use the records previously loaded instead of retrieving
them from the database again.
Adam Hess
Deprecate read_attribute(:id) returning the primary key if the primary key is not :id.
Starting in Rails 7.2, read_attribute(:id) will return the value of the id column, regardless of the model's
primary key. To retrieve the value of the primary key, use #id instead. read_attribute(:id) for composite
primary key models will now return the value of the id column.
Adrianna Chang
Fix change_table setting datetime precision for 6.1 Migrations
Hartley McGuire
Fix change_column setting datetime precision for 6.1 Migrations
Hartley McGuire
Add ActiveRecord::Base#id_value alias to access the raw value of a record's id column.
This alias is only provided for models that declare an :id column.
Adrianna Chang
Fix previous change tracking for ActiveRecord::Store when using a column with JSON structured database type
Before, the methods to access the changes made during the last save #saved_change_to_key?, #saved_change_to_key, and #key_before_last_save did not work if the store was defined as a store_accessor on a column with a JSON structured database type
Robert DiMartino
Fully support NULLS [NOT] DISTINCT for PostgreSQL 15+ indexes.
Previous work was done to allow the index to be created in a migration, but it was not
supported in schema.rb. Additionally, the matching for NULLS [NOT] DISTINCT was not
in the correct order, which could have resulted in inconsistent schema detection.
Gregory Jones
Allow escaping of literal colon characters in sanitize_sql_* methods when named bind variables are used
Justin Bull
Fix #previously_new_record? to return true for destroyed records.
Before, if a record was created and then destroyed, #previously_new_record? would return true.
Now, any UPDATE or DELETE to a record is considered a change, and will result in #previously_new_record?
returning false.
Adrianna Chang

Specify callback in has_secure_token

class User < ApplicationRecord
  has_secure_token on: :initialize
end

User.new.token # => "abc123...."

Sean Doyle

Fix incrementation of in memory counter caches when associations overlap
When two associations had a similarly named counter cache column, Active Record
could sometime increment the wrong one.
Jacopo Beschi, Jean Boussier

Don't show secrets for Active Record's Cipher::Aes256Gcm#inspect.

Before:

ActiveRecord::Encryption::Cipher::Aes256Gcm.new(secret).inspect
"#<ActiveRecord::Encryption::Cipher::Aes256Gcm:0x0000000104888038 ... @secret=\"\\xAF\\bFh]LV}q\\nl\\xB2U\\xB3 ... >"

After:

ActiveRecord::Encryption::Cipher::Aes256Gcm(secret).inspect
"#<ActiveRecord::Encryption::Cipher::Aes256Gcm:0x0000000104888038>"

Petrik de Heus

Bring back the historical behavior of committing transaction on non-local return.
```
Model.transaction do
  model.save
  return
  other_model.save # not executed
end
```
Historically only raised errors would trigger a rollback, but in Ruby 2.3, the timeout library
started using throw to interrupt execution which had the adverse effect of committing open transactions.
To solve this, in Active Record 6.1 the behavior was changed to instead rollback the transaction as it was safer
than to potentially commit an incomplete transaction.
Using return, break or throw inside a transaction block was essentially deprecated from Rails 6.1 onwards.
However with the release of timeout 0.4.0, Timeout.timeout now raises an error again, and Active Record is able
to return to its original, less surprising, behavior.
This historical behavior can now be opt-ed in via:
```
Rails.application.config.active_record.commit_transaction_on_non_local_return = true
```
And is the default for new applications created in Rails 7.1.
Jean Boussier
Deprecate name argument on #remove_connection.
The name argument is deprecated on #remove_connection without replacement. #remove_connection should be called directly on the class that established the connection.
Eileen M. Uchitelle
Fix has_one through singular building with inverse.
Allows building of records from an association with a has_one through a
singular association with inverse. For belongs_to through associations,
linking the foreign key to the primary key model isn't needed.
For has_one, we cannot build records due to the association not being mutable.
Gannon McGibbon
Disable database prepared statements when query logs are enabled
Prepared Statements and Query Logs are incompatible features due to query logs making every query unique.
zzak, Jean Boussier
Support decrypting data encrypted non-deterministically with a SHA1 hash digest.
This adds a new Active Record encryption option to support decrypting data encrypted
non-deterministically with a SHA1 hash digest:
```
Rails.application.config.active_record.encryption.support_sha1_for_non_deterministic_encryption = true
```
The new option addresses a problem when upgrading from 7.0 to 7.1. Due to a bug in how Active Record
Encryption was getting initialized, the key provider used for non-deterministic encryption were using
SHA-1 as its digest class, instead of the one configured globally by Rails via
Rails.application.config.active_support.key_generator_hash_digest_class.
Cadu Ribeiro and Jorge Manrubia

Added PostgreSQL migration commands for enum rename, add value, and rename value.

rename_enum and rename_enum_value are reversible. Due to Postgres
limitation, add_enum_value is not reversible since you cannot delete enum
values. As an alternative you should drop and recreate the enum entirely.

rename_enum :article_status, to: :article_state

add_enum_value :article_state, "archived" # will be at the end of existing values
add_enum_value :article_state, "in review", before: "published"
add_enum_value :article_state, "approved", after: "in review"

rename_enum_value :article_state, from: "archived", to: "deleted"

Ray Faddis

Allow composite primary key to be derived from schema
Booting an application with a schema that contains composite primary keys
will not issue warning and won't nilify the ActiveRecord::Base#primary_key value anymore.
Given a travel_routes table definition and a TravelRoute model like:
```
create_table :travel_routes, primary_key: [:origin, :destination], force: true do |t|
  t.string :origin
  t.string :destination
end

class TravelRoute < ActiveRecord::Base; end
```
The TravelRoute.primary_key value will be automatically derived to ["origin", "destination"]
Nikita Vasilevsky
Include the connection_pool with exceptions raised from an adapter.
The connection_pool provides added context such as the connection used
that led to the exception as well as which role and shard.
Luan Vieira
Support multiple column ordering for find_each, find_in_batches and in_batches.
When find_each/find_in_batches/in_batches are performed on a table with composite primary keys, ascending or descending order can be selected for each key.
```
Person.find_each(order: [:desc, :asc]) do |person|
  person.party_all_night!
end
```
Takuya Kurimoto

Fix where on association with has_one/has_many polymorphic relations.

Before:

Treasure.where(price_estimates: PriceEstimate.all)
#=> SELECT (...) WHERE "treasures"."id" IN (SELECT "price_estimates"."estimate_of_id" FROM "price_estimates")

Later:

Treasure.where(price_estimates: PriceEstimate.all)
#=> SELECT (...) WHERE "treasures"."id" IN (SELECT "price_estimates"."estimate_of_id" FROM "price_estimates" WHERE "price_estimates"."estimate_of_type" = 'Treasure')

Lázaro Nixon

Assign auto populated columns on Active Record record creation.
Changes record creation logic to allow for the auto_increment column to be assigned
immediately after creation regardless of it's relation to the model's primary key.
The PostgreSQL adapter benefits the most from the change allowing for any number of auto-populated
columns to be assigned on the object immediately after row insertion utilizing the RETURNING statement.
Nikita Vasilevsky
Use the first key in the shards hash from connected_to for the default_shard.
Some applications may not want to use :default as a shard name in their connection model. Unfortunately Active Record expects there to be a :default shard because it must assume a shard to get the right connection from the pool manager. Rather than force applications to manually set this, connects_to can infer the default shard name from the hash of shards and will now assume that the first shard is your default.
For example if your model looked like this:
```
class ShardRecord < ApplicationRecord
  self.abstract_class = true

  connects_to shards: {
    shard_one: { writing: :shard_one },
    shard_two: { writing: :shard_two }
  }
```
Then the default_shard for this class would be set to shard_one.
Fixes: #45390
Eileen M. Uchitelle
Fix mutation detection for serialized attributes backed by binary columns.
Jean Boussier
Add ActiveRecord.disconnect_all! method to immediately close all connections from all pools.
Jean Boussier
Discard connections which may have been left in a transaction.
There are cases where, due to an error, within_new_transaction may unexpectedly leave a connection in an open transaction. In these cases the connection may be reused, and the following may occur:
- Writes appear to fail when they actually succeed.
- Writes appear to succeed when they actually fail.
- Reads return stale or uncommitted data.
Previously, the following case was detected:
- An error is encountered during the transaction, then another error is encountered while attempting to roll it back.
Now, the following additional cases are detected:
- An error is encountered just after successfully beginning a transaction.
- An error is encountered while committing a transaction, then another error is encountered while attempting to roll it back.
- An error is encountered while rolling back a transaction.
Nick Dower
Active Record query cache now evicts least recently used entries
By default it only keeps the 100 most recently used queries.
The cache size can be configured via database.yml
```
development:
  adapter: mysql2
  query_cache: 200
```
It can also be entirely disabled:
```
development:
  adapter: mysql2
  query_cache: false
```
Jean Boussier
Deprecate check_pending! in favor of check_all_pending!.
check_pending! will only check for pending migrations on the current database connection or the one passed in. This has been deprecated in favor of check_all_pending! which will find all pending migrations for the database configurations in a given environment.
Eileen M. Uchitelle
Make increment_counter/decrement_counter accept an amount argument
```
Post.increment_counter(:comments_count, 5, by: 3)
```
fatkodima
Add support for Array#intersect? to ActiveRecord::Relation.
Array#intersect? is only available on Ruby 3.1 or later.
This allows the Rubocop Style/ArrayIntersect cop to work with ActiveRecord::Relation objects.
John Harry Kelly
The deferrable foreign key can be passed to t.references.
Hiroyuki Ishii
Deprecate deferrable: true option of add_foreign_key.
deferrable: true is deprecated in favor of deferrable: :immediate, and
will be removed in Rails 7.2.
Because deferrable: true and deferrable: :deferred are hard to understand.
Both true and :deferred are truthy values.
This behavior is the same as the deferrable option of the add_unique_key method, added in #46192.
Hiroyuki Ishii
AbstractAdapter#execute and #exec_query now clear the query cache
If you need to perform a read only SQL query without clearing the query
cache, use AbstractAdapter#select_all.
Jean Boussier

Make .joins / .left_outer_joins work with CTEs.

For example:

Post
 .with(commented_posts: Comment.select(:post_id).distinct)
 .joins(:commented_posts)
#=> WITH (...) SELECT ... INNER JOIN commented_posts on posts.id = commented_posts.post_id

Vladimir Dementyev

Add a load hook for ActiveRecord::ConnectionAdapters::Mysql2Adapter
(named active_record_mysql2adapter) to allow for overriding aspects of the
ActiveRecord::ConnectionAdapters::Mysql2Adapter class. This makes Mysql2Adapter
consistent with PostgreSQLAdapter and SQLite3Adapter that already have load hooks.
fatkodima
Introduce adapter for Trilogy database client
Trilogy is a MySQL-compatible database client. Rails applications can use Trilogy
by configuring their config/database.yml:
```
development:
adapter: trilogy
database: blog_development
pool: 5
```
Or by using the DATABASE_URL environment variable:
```
ENV['DATABASE_URL'] # => "trilogy://localhost/blog_development?pool=5"
```
Adrianna Chang

after_commit callbacks defined on models now execute in the correct order.

class User < ActiveRecord::Base
  after_commit { puts("this gets called first") }
  after_commit { puts("this gets called second") }
end

Previously, the callbacks executed in the reverse order. To opt in to the new behaviour:

config.active_record.run_after_transaction_callbacks_in_order_defined = true

This is the default for new apps.

Alex Ghiculescu

Infer foreign_key when inverse_of is present on has_one and has_many associations.
```
has_many :citations, foreign_key: "book1_id", inverse_of: :book
```
can be simplified to
```
has_many :citations, inverse_of: :book
```
and the foreign_key will be read from the corresponding belongs_to association.
Daniel Whitney
Limit max length of auto generated index names
Auto generated index names are now limited to 62 bytes, which fits within
the default index name length limits for MySQL, Postgres and SQLite.
Any index name over the limit will fallback to the new short format.
Before (too long):
```
index_testings_on_foo_and_bar_and_first_name_and_last_name_and_administrator
```
After (short format):
```
idx_on_foo_bar_first_name_last_name_administrator_5939248142
```
The short format includes a hash to ensure the name is unique database-wide.
Mike Coutermarsh
Introduce a more stable and optimized Marshal serializer for Active Record models.
Can be enabled with config.active_record.marshalling_format_version = 7.1.
Jean Boussier

Allow specifying where clauses with column-tuple syntax.

Querying through #where now accepts a new tuple-syntax which accepts, as
a key, an array of columns and, as a value, an array of corresponding tuples.
The key specifies a list of columns, while the value is an array of
ordered-tuples that conform to the column list.

For instance:

# Cpk::Book => Cpk::Book(author_id: integer, number: integer, title: string, revision: integer)
# Cpk::Book.primary_key => ["author_id", "number"]

book = Cpk::Book.create!(author_id: 1, number: 1)
Cpk::Book.where(Cpk::Book.primary_key => [[1, 2]]) # => [book]

# Topic => Topic(id: integer, title: string, author_name: string...)

Topic.where([:title, :author_name] => [["The Alchemist", "Paulo Coelho"], ["Harry Potter", "J.K Rowling"]])

Paarth Madan

Allow warning codes to be ignore when reporting SQL warnings.
Active Record config that can ignore warning codes
```
# Configure allowlist of warnings that should always be ignored
config.active_record.db_warnings_ignore = [
  "1062", # MySQL Error 1062: Duplicate entry
]
```
This is supported for the MySQL and PostgreSQL adapters.
Nick Borromeo

Introduce :active_record_fixtures lazy load hook.

Hooks defined with this name will be run whenever TestFixtures is included
in a class.

ActiveSupport.on_load(:active_record_fixtures) do
  self.fixture_paths << "test/fixtures"
end

klass = Class.new
klass.include(ActiveRecord::TestFixtures)

klass.fixture_paths # => ["test/fixtures"]

Andrew Novoselac

Introduce TestFixtures#fixture_paths.
Multiple fixture paths can now be specified using the #fixture_paths accessor.
Apps will continue to have test/fixtures as their one fixture path by default,
but additional fixture paths can be specified.
```
ActiveSupport::TestCase.fixture_paths << "component1/test/fixtures"
ActiveSupport::TestCase.fixture_paths << "component2/test/fixtures"
```
TestFixtures#fixture_path is now deprecated.
Andrew Novoselac
Adds support for deferrable exclude constraints in PostgreSQL.
By default, exclude constraints in PostgreSQL are checked after each statement.
This works for most use cases, but becomes a major limitation when replacing
records with overlapping ranges by using multiple statements.
```
exclusion_constraint :users, "daterange(valid_from, valid_to) WITH &&", deferrable: :immediate
```
Passing deferrable: :immediate checks constraint after each statement,
but allows manually deferring the check using SET CONSTRAINTS ALL DEFERRED
within a transaction. This will cause the excludes to be checked after the transaction.
It's also possible to change the default behavior from an immediate check
(after the statement), to a deferred check (after the transaction):
```
exclusion_constraint :users, "daterange(valid_from, valid_to) WITH &&", deferrable: :deferred
```
Hiroyuki Ishii
Respect foreign_type option to delegated_type for {role}_class method.
Usage of delegated_type with non-conventional {role}_type column names can now be specified with foreign_type option.
This option is the same as foreign_type as forwarded to the underlying belongs_to association that delegated_type wraps.
Jason Karns
Add support for unique constraints (PostgreSQL-only).
```
add_unique_key :sections, [:position], deferrable: :deferred, name: "unique_section_position"
remove_unique_key :sections, name: "unique_section_position"
```
See PostgreSQL's Unique Constraints documentation for more on unique constraints.
By default, unique constraints in PostgreSQL are checked after each statement.
This works for most use cases, but becomes a major limitation when replacing
records with unique column by using multiple statements.
An example of swapping unique columns between records.
```
# position is unique column
old_item = Item.create!(position: 1)
new_item = Item.create!(position: 2)

Item.transaction do
  old_item.update!(position: 2)
  new_item.update!(position: 1)
end
```
Using the default behavior, the transaction would fail when executing the
first UPDATE statement.
By passing the :deferrable option to the add_unique_key statement in
migrations, it's possible to defer this check.
```
add_unique_key :items, [:position], deferrable: :immediate
```
Passing deferrable: :immediate does not change the behaviour of the previous example,
but allows manually deferring the check using SET CONSTRAINTS ALL DEFERRED within a transaction.
This will cause the unique constraints to be checked after the transaction.
It's also possible to adjust the default behavior from an immediate
check (after the statement), to a deferred check (after the transaction):
```
add_unique_key :items, [:position], deferrable: :deferred
```
If you want to change an existing unique index to deferrable, you can use :using_index
to create deferrable unique constraints.
```
add_unique_key :items, deferrable: :deferred, using_index: "index_items_on_position"
```
Hiroyuki Ishii
Remove deprecated Tasks::DatabaseTasks.schema_file_type.
Rafael Mendonça França
Remove deprecated config.active_record.partial_writes.
Rafael Mendonça França
Remove deprecated ActiveRecord::Base config accessors.
Rafael Mendonça França
Remove the :include_replicas argument from configs_for. Use :include_hidden argument instead.
Eileen M. Uchitelle
Allow applications to lookup a config via a custom hash key.
If you have registered a custom config or want to find configs where the hash matches a specific key, now you can pass config_key to configs_for. For example if you have a db_config with the key vitess you can look up a database configuration hash by matching that key.
```
ActiveRecord::Base.configurations.configs_for(env_name: "development", name: "primary", config_key: :vitess)
ActiveRecord::Base.configurations.configs_for(env_name: "development", config_key: :vitess)
```
Eileen M. Uchitelle
Allow applications to register a custom database configuration handler.
Adds a mechanism for registering a custom handler for cases where you want database configurations to respond to custom methods. This is useful for non-Rails database adapters or tools like Vitess that you may want to configure differently from a standard HashConfig or UrlConfig.
Given the following database YAML we want the animals db to create a CustomConfig object instead while the primary database will be a UrlConfig:
```
development:
  primary:
    url: postgres://localhost/primary
  animals:
    url: postgres://localhost/animals
    custom_config:
      sharded: 1
```
To register a custom handler first make a class that has your custom methods:
```
class CustomConfig < ActiveRecord::DatabaseConfigurations::UrlConfig
  def sharded?
    custom_config.fetch("sharded", false)
  end

  private
    def custom_config
      configuration_hash.fetch(:custom_config)
    end
end
```
Then register the config in an initializer:
```
ActiveRecord::DatabaseConfigurations.register_db_config_handler do |env_name, name, url, config|
  next unless config.key?(:custom_config)
  CustomConfig.new(env_name, name, url, config)
end
```
When the application is booted, configuration hashes with the :custom_config key will be CustomConfig objects and respond to sharded?. Applications must handle the condition in which Active Record should use their custom handler.
Eileen M. Uchitelle and John Crepezzi
ActiveRecord::Base.serialize no longer uses YAML by default.
YAML isn't particularly performant and can lead to security issues
if not used carefully.
Unfortunately there isn't really any good serializers in Ruby's stdlib
to replace it.
The obvious choice would be JSON, which is a fine format for this use case,
however the JSON serializer in Ruby's stdlib isn't strict enough, as it fallback
to casting unknown types to strings, which could lead to corrupted data.
Some third party JSON libraries like Oj have a suitable strict mode.
So it's preferable that users choose a serializer based on their own constraints.
The original default can be restored by setting config.active_record.default_column_serializer = YAML.
Jean Boussier
ActiveRecord::Base.serialize signature changed.
Rather than a single positional argument that accepts two possible
types of values, serialize now accepts two distinct keyword arguments.
Before:
```
serialize :content, JSON
serialize :backtrace, Array
```
After:
```
serialize :content, coder: JSON
serialize :backtrace, type: Array
```
Jean Boussier
YAML columns use YAML.safe_dump if available.
As of psych 5.1.0, YAML.safe_dump can now apply the same permitted
types restrictions than YAML.safe_load.
It's preferable to ensure the payload only use allowed types when we first
try to serialize it, otherwise you may end up with invalid records in the
database.
Jean Boussier
ActiveRecord::QueryLogs better handle broken encoding.
It's not uncommon when building queries with BLOB fields to contain
binary data. Unless the call carefully encode the string in ASCII-8BIT
it generally end up being encoded in UTF-8, and QueryLogs would
end up failing on it.
ActiveRecord::QueryLogs no longer depend on the query to be properly encoded.
Jean Boussier
Fix a bug where ActiveRecord::Generators::ModelGenerator would not respect create_table_migration template overrides.
```
rails g model create_books title:string content:text
```
will now read from the create_table_migration.rb.tt template in the following locations in order:
```
lib/templates/active_record/model/create_table_migration.rb
lib/templates/active_record/migration/create_table_migration.rb
```
Spencer Neste
ActiveRecord::Relation#explain now accepts options.
For databases and adapters which support them (currently PostgreSQL
and MySQL), options can be passed to explain to provide more
detailed query plan analysis:
```
Customer.where(id: 1).joins(:orders).explain(:analyze, :verbose)
```
Reid Lynch
Multiple Arel::Nodes::SqlLiteral nodes can now be added together to
form Arel::Nodes::Fragments nodes. This allows joining several pieces
of SQL.
Matthew Draper, Ole Friis
ActiveRecord::Base#signed_id raises if called on a new record.
Previously it would return an ID that was not usable, since it was based on id = nil.
Alex Ghiculescu

Allow SQL warnings to be reported.

Active Record configs can be set to enable SQL warning reporting.

# Configure action to take when SQL query produces warning
config.active_record.db_warnings_action = :raise

# Configure allowlist of warnings that should always be ignored
config.active_record.db_warnings_ignore = [
  /Invalid utf8mb4 character string/,
  "An exact warning message",
]

This is supported for the MySQL and PostgreSQL adapters.

Adrianna Chang, Paarth Madan

Add #regroup query method as a short-hand for .unscope(:group).group(fields)
Example:
```
Post.group(:title).regroup(:author)
# SELECT `posts`.`*` FROM `posts` GROUP BY `posts`.`author`
```
Danielius Visockas
PostgreSQL adapter method enable_extension now allows parameter to be [schema_name.]<extension_name>
if the extension must be installed on another schema.
Example: enable_extension('heroku_ext.hstore')
Leonardo Luarte
Add :include option to add_index.
Add support for including non-key columns in indexes for PostgreSQL
with the INCLUDE parameter.
```
add_index(:users, :email, include: [:id, :created_at])
```
will result in:
```
CREATE INDEX index_users_on_email USING btree (email) INCLUDE (id, created_at)
```
Steve Abrams
ActiveRecord::Relation’s #any?, #none?, and #one? methods take an optional pattern
argument, more closely matching their Enumerable equivalents.
George Claghorn

Add ActiveRecord::Base.normalizes for declaring attribute normalizations.

An attribute normalization is applied when the attribute is assigned or
updated, and the normalized value will be persisted to the database. The
normalization is also applied to the corresponding keyword argument of query
methods, allowing records to be queried using unnormalized values.

For example:

class User < ActiveRecord::Base
  normalizes :email, with: -> email { email.strip.downcase }
  normalizes :phone, with: -> phone { phone.delete("^0-9").delete_prefix("1") }
end

user = User.create(email: " CRUISE-CONTROL@EXAMPLE.COM\n")
user.email                  # => "cruise-control@example.com"

user = User.find_by(email: "\tCRUISE-CONTROL@EXAMPLE.COM ")
user.email                  # => "cruise-control@example.com"
user.email_before_type_cast # => "cruise-control@example.com"

User.where(email: "\tCRUISE-CONTROL@EXAMPLE.COM ").count         # => 1
User.where(["email = ?", "\tCRUISE-CONTROL@EXAMPLE.COM "]).count # => 0

User.exists?(email: "\tCRUISE-CONTROL@EXAMPLE.COM ")         # => true
User.exists?(["email = ?", "\tCRUISE-CONTROL@EXAMPLE.COM "]) # => false

User.normalize_value_for(:phone, "+1 (555) 867-5309") # => "5558675309"

Jonathan Hefner

Hide changes to before_committed! callback behaviour behind flag.
In #46525, behavior around before_committed! callbacks was changed so that callbacks
would run on every enrolled record in a transaction, not just the first copy of a record.
This change in behavior is now controlled by a configuration option,
config.active_record.before_committed_on_all_records. It will be enabled by default on Rails 7.1.
Adrianna Chang
The namespaced_controller Query Log tag now matches the controller format
For example, a request processed by NameSpaced::UsersController will now log as:
```
:controller # "users"
:namespaced_controller # "name_spaced/users"
```
Alex Ghiculescu
Return only unique ids from ActiveRecord::Calculations#ids
Updated ActiveRecord::Calculations#ids to only return the unique ids of the base model
when using eager_load, preload and includes.
```
Post.find_by(id: 1).comments.count
# => 5
Post.includes(:comments).where(id: 1).pluck(:id)
# => [1, 1, 1, 1, 1]
Post.includes(:comments).where(id: 1).ids
# => [1]
```
Joshua Young
Stop using LOWER() for case-insensitive queries on citext columns
Previously, LOWER() was added for e.g. uniqueness validations with
case_sensitive: false.
It wasn't mentioned in the documentation that the index without LOWER()
wouldn't be used in this case.
Phil Pirozhkov
Extract #sync_timezone_changes method in AbstractMysqlAdapter to enable subclasses
to sync database timezone changes without overriding #raw_execute.
Adrianna Chang, Paarth Madan
Do not write additional new lines when dumping sql migration versions
This change updates the insert_versions_sql function so that the database insert string containing the current database migration versions does not end with two additional new lines.
Misha Schwartz
Fix composed_of value freezing and duplication.
Previously composite values exhibited two confusing behaviors:
- When reading a compositve value it'd NOT be frozen, allowing it to get out of sync with its underlying database
  columns.
- When writing a compositve value the argument would be frozen, potentially confusing the caller.
Currently, composite values instantiated based on database columns are frozen (addressing the first issue) and
assigned compositve values are duplicated and the duplicate is frozen (addressing the second issue).
Greg Navis
Fix redundant updates to the column insensitivity cache
Fixed redundant queries checking column capability for insensitive
comparison.
Phil Pirozhkov
Allow disabling methods generated by ActiveRecord.enum.
Alfred Dominic
Avoid validating belongs_to association if it has not changed.
Previously, when updating a record, Active Record will perform an extra query to check for the presence of
belongs_to associations (if the presence is configured to be mandatory), even if that attribute hasn't changed.
Currently, only belongs_to-related columns are checked for presence. It is possible to have orphaned records with
this approach. To avoid this problem, you need to use a foreign key.
This behavior can be controlled by configuration:
```
config.active_record.belongs_to_required_validates_foreign_key = false
```
and will be disabled by default with config.load_defaults 7.1.
fatkodima
has_one and belongs_to associations now define a reset_association method
on the owner model (where association is the name of the association). This
method unloads the cached associate record, if any, and causes the next access
to query it from the database.
George Claghorn
Allow per attribute setting of YAML permitted classes (safe load) and unsafe load.
Carlos Palhares
Add a build persistence method
Provides a wrapper for new, to provide feature parity with creates
ability to create multiple records from an array of hashes, using the
same notation as the build method on associations.
Sean Denny

Raise on assignment to readonly attributes

class Post < ActiveRecord::Base
  attr_readonly :content
end
Post.create!(content: "cannot be updated")
post.content # "cannot be updated"
post.content = "something else" # => ActiveRecord::ReadonlyAttributeError

Previously, assignment would succeed but silently not write to the database.

This behavior can be controlled by configuration:

config.active_record.raise_on_assign_to_attr_readonly = true

and will be enabled by default with config.load_defaults 7.1.

Alex Ghiculescu, Hartley McGuire

Allow unscoping of preload and eager_load associations
Added the ability to unscope preload and eager_load associations just like
includes, joins, etc. See ActiveRecord::QueryMethods::VALID_UNSCOPING_VALUES
for the full list of supported unscopable scopes.
```
query.unscope(:eager_load, :preload).group(:id).select(:id)
```
David Morehouse
Add automatic filtering of encrypted attributes on inspect
This feature is enabled by default but can be disabled with
```
config.active_record.encryption.add_to_filter_parameters = false
```
Hartley McGuire
Clear locking column on #dup
This change fixes not to duplicate locking_column like id and timestamps.
```
car = Car.create!
car.touch
car.lock_version #=> 1
car.dup.lock_version #=> 0
```
Shouichi Kamiya, Seonggi Yang, Ryohei UEDA
Invalidate transaction as early as possible
After rescuing a TransactionRollbackError exception Rails invalidates transactions earlier in the flow
allowing the framework to skip issuing the ROLLBACK statement in more cases.
Only affects adapters that have savepoint_errors_invalidate_transactions? configured as true,
which at this point is only applicable to the mysql2 adapter.
Nikita Vasilevsky
Allow configuring columns list to be used in SQL queries issued by an ActiveRecord::Base object
It is now possible to configure columns list that will be used to build an SQL query clauses when
updating, deleting or reloading an ActiveRecord::Base object
```
class Developer < ActiveRecord::Base
  query_constraints :company_id, :id
end
developer = Developer.first.update(name: "Bob")
# => UPDATE "developers" SET "name" = 'Bob' WHERE "developers"."company_id" = 1 AND "developers"."id" = 1
```
Nikita Vasilevsky
Adds validate to foreign keys and check constraints in schema.rb
Previously, schema.rb would not record if validate: false had been used when adding a foreign key or check
constraint, so restoring a database from the schema could result in foreign keys or check constraints being
incorrectly validated.
Tommy Graves
Adapter #execute methods now accept an allow_retry option. When set to true, the SQL statement will be
retried, up to the database's configured connection_retries value, upon encountering connection-related errors.
Adrianna Chang
Only trigger after_commit :destroy callbacks when a database row is deleted.
This prevents after_commit :destroy callbacks from being triggered again
when destroy is called multiple times on the same record.
Ben Sheldon

Fix ciphertext_for for yet-to-be-encrypted values.

Previously, ciphertext_for returned the cleartext of values that had not
yet been encrypted, such as with an unpersisted record:

Post.encrypts :body

post = Post.create!(body: "Hello")
post.ciphertext_for(:body)
# => "{\"p\":\"abc..."

post.body = "World"
post.ciphertext_for(:body)
# => "World"

Now, ciphertext_for will always return the ciphertext of encrypted
attributes:

Post.encrypts :body

post = Post.create!(body: "Hello")
post.ciphertext_for(:body)
# => "{\"p\":\"abc..."

post.body = "World"
post.ciphertext_for(:body)
# => "{\"p\":\"xyz..."

Jonathan Hefner

Fix a bug where using groups and counts with long table names would return incorrect results.
Shota Toguchi, Yusaku Ono

Fix encryption of column default values.

Previously, encrypted attributes that used column default values appeared to
be encrypted on create, but were not:

Book.encrypts :name

book = Book.create!
book.name
# => "<untitled>"
book.name_before_type_cast
# => "{\"p\":\"abc..."
book.reload.name_before_type_cast
# => "<untitled>"

Now, attributes with column default values are encrypted:

Book.encrypts :name

book = Book.create!
book.name
# => "<untitled>"
book.name_before_type_cast
# => "{\"p\":\"abc..."
book.reload.name_before_type_cast
# => "{\"p\":\"abc..."

Jonathan Hefner

Deprecate delegation from Base to connection_handler.
Calling Base.clear_all_connections!, Base.clear_active_connections!, Base.clear_reloadable_connections! and Base.flush_idle_connections! is deprecated. Please call these methods on the connection handler directly. In future Rails versions, the delegation from Base to the connection_handler will be removed.
Eileen M. Uchitelle
Allow ActiveRecord::QueryMethods#reselect to receive hash values, similar to ActiveRecord::QueryMethods#select
Sampat Badhe
Validate options when managing columns and tables in migrations.
If an invalid option is passed to a migration method like create_table and add_column, an error will be raised
instead of the option being silently ignored. Validation of the options will only be applied for new migrations
that are created.
Guo Xiang Tan, George Wambold
Update query log tags to use the SQLCommenter format by default. See #46179
To opt out of SQLCommenter-formatted query log tags, set config.active_record.query_log_tags_format = :legacy. By default, this is set to :sqlcommenter.
Modulitos and Iheanyi
Allow any ERB in the database.yml when creating rake tasks.
Any ERB can be used in database.yml even if it accesses environment
configurations.
Deprecates config.active_record.suppress_multiple_database_warning.
Eike Send
Add table to error for duplicate column definitions.
If a migration defines duplicate columns for a table, the error message
shows which table it concerns.
Petrik de Heus
Fix erroneous nil default precision on virtual datetime columns.
Prior to this change, virtual datetime columns did not have the same
default precision as regular datetime columns, resulting in the following
being erroneously equivalent:
```
t.virtual :name, type: datetime,                 as: "expression"
t.virtual :name, type: datetime, precision: nil, as: "expression"
```
This change fixes the default precision lookup, so virtual and regular
datetime column default precisions match.
Sam Bostock
Use connection from #with_raw_connection in #quote_string.
This ensures that the string quoting is wrapped in the reconnect and retry logic
that #with_raw_connection offers.
Adrianna Chang
Add expires_at option to signed_id.
Shouichi Kamiya
Allow applications to set retry deadline for query retries.
Building on the work done in #44576 and #44591, we extend the logic that automatically
reconnects database connections to take into account a timeout limit. We won't retry
a query if a given amount of time has elapsed since the query was first attempted. This
value defaults to nil, meaning that all retryable queries are retried regardless of time elapsed,
but this can be changed via the retry_deadline option in the database config.
Adrianna Chang
Fix a case where the query cache can return wrong values. See #46044
Aaron Patterson
Support MySQL's ssl-mode option for MySQLDatabaseTasks.
Verifying the identity of the database server requires setting the ssl-mode
option to VERIFY_CA or VERIFY_IDENTITY. This option was previously ignored
for MySQL database tasks like creating a database and dumping the structure.
Petrik de Heus
Move ActiveRecord::InternalMetadata to an independent object.
ActiveRecord::InternalMetadata no longer inherits from ActiveRecord::Base and is now an independent object that should be instantiated with a connection. This class is private and should not be used by applications directly. If you want to interact with the schema migrations table, please access it on the connection directly, for example: ActiveRecord::Base.connection.schema_migration.
Eileen M. Uchitelle
Deprecate quoting ActiveSupport::Duration as an integer
Using ActiveSupport::Duration as an interpolated bind parameter in a SQL
string template is deprecated. To avoid this warning, you should explicitly
convert the duration to a more specific database type. For example, if you
want to use a duration as an integer number of seconds:
```
Record.where("duration = ?", 1.hour.to_i)
```
If you want to use a duration as an ISO 8601 string:
```
Record.where("duration = ?", 1.hour.iso8601)
```
Aram Greenman

Allow QueryMethods#in_order_of to order by a string column name.

Post.in_order_of("id", [4,2,3,1]).to_a
Post.joins(:author).in_order_of("authors.name", ["Bob", "Anna", "John"]).to_a

Igor Kasyanchuk

Move ActiveRecord::SchemaMigration to an independent object.
ActiveRecord::SchemaMigration no longer inherits from ActiveRecord::Base and is now an independent object that should be instantiated with a connection. This class is private and should not be used by applications directly. If you want to interact with the schema migrations table, please access it on the connection directly, for example: ActiveRecord::Base.connection.schema_migration.
Eileen M. Uchitelle
Deprecate all_connection_pools and make connection_pool_list more explicit.
Following on #45924 all_connection_pools is now deprecated. connection_pool_list will either take an explicit role or applications can opt into the new behavior by passing :all.
Eileen M. Uchitelle
Fix connection handler methods to operate on all pools.
active_connections?, clear_active_connections!, clear_reloadable_connections!, clear_all_connections!, and flush_idle_connections! now operate on all pools by default. Previously they would default to using the current_role or :writing role unless specified.
Eileen M. Uchitelle

Allow ActiveRecord::QueryMethods#select to receive hash values.

Currently, select might receive only raw sql and symbols to define columns and aliases to select.

With this change we can provide hash as argument, for example:

Post.joins(:comments).select(posts: [:id, :title, :created_at], comments: [:id, :body, :author_id])
#=> "SELECT \"posts\".\"id\", \"posts\".\"title\", \"posts\".\"created_at\", \"comments\".\"id\", \"comments\".\"body\", \"comments\".\"author_id\"
#   FROM \"posts\" INNER JOIN \"comments\" ON \"comments\".\"post_id\" = \"posts\".\"id\""

Post.joins(:comments).select(posts: { id: :post_id, title: :post_title }, comments: { id: :comment_id, body: :comment_body })
#=> "SELECT posts.id as post_id, posts.title as post_title, comments.id as comment_id, comments.body as comment_body
#    FROM \"posts\" INNER JOIN \"comments\" ON \"comments\".\"post_id\" = \"posts\".\"id\""

Oleksandr Holubenko, Josef Šimánek, Jean Boussier

Adapts virtual attributes on ActiveRecord::Persistence#becomes.

When source and target classes have a different set of attributes adapts
attributes such that the extra attributes from target are added.

class Person < ApplicationRecord
end

class WebUser < Person
  attribute :is_admin, :boolean
  after_initialize :set_admin

  def set_admin
    write_attribute(:is_admin, email =~ /@ourcompany\.com$/)
  end
end

person = Person.find_by(email: "email@ourcompany.com")
person.respond_to? :is_admin
# => false
person.becomes(WebUser).is_admin?
# => true

Jacopo Beschi, Sampson Crowley

Fix ActiveRecord::QueryMethods#in_order_of to include nils, to match the
behavior of Enumerable#in_order_of.
For example, Post.in_order_of(:title, [nil, "foo"]) will now include posts
with nil titles, the same as Post.all.to_a.in_order_of(:title, [nil, "foo"]).
fatkodima

Optimize add_timestamps to use a single SQL statement.

add_timestamps :my_table

Now results in the following SQL:

ALTER TABLE "my_table" ADD COLUMN "created_at" datetime(6) NOT NULL, ADD COLUMN "updated_at" datetime(6) NOT NULL

Iliana Hadzhiatanasova

Add drop_enum migration command for PostgreSQL
This does the inverse of create_enum. Before dropping an enum, ensure you have
dropped columns that depend on it.
Alex Ghiculescu
Adds support for if_exists option when removing a check constraint.
The remove_check_constraint method now accepts an if_exists option. If set
to true an error won't be raised if the check constraint doesn't exist.
Margaret Parsa and Aditya Bhutani
find_or_create_by now try to find a second time if it hits a unicity constraint.
find_or_create_by always has been inherently racy, either creating multiple
duplicate records or failing with ActiveRecord::RecordNotUnique depending on
whether a proper unicity constraint was set.
create_or_find_by was introduced for this use case, however it's quite wasteful
when the record is expected to exist most of the time, as INSERT require to send
more data than SELECT and require more work from the database. Also on some
databases it can actually consume a primary key increment which is undesirable.
So for case where most of the time the record is expected to exist, find_or_create_by
can be made race-condition free by re-trying the find if the create failed
with ActiveRecord::RecordNotUnique. This assumes that the table has the proper
unicity constraints, if not, find_or_create_by will still lead to duplicated records.
Jean Boussier, Alex Kitchens
Introduce a simpler constructor API for ActiveRecord database adapters.
Previously the adapter had to know how to build a new raw connection to
support reconnect, but also expected to be passed an initial already-
established connection.
When manually creating an adapter instance, it will now accept a single
config hash, and only establish the real connection on demand.
Matthew Draper
Avoid redundant SELECT 1 connection-validation query during DB pool
checkout when possible.
If the first query run during a request is known to be idempotent, it can be
used directly to validate the connection, saving a network round-trip.
Matthew Draper
Automatically reconnect broken database connections when safe, even
mid-request.
When an error occurs while attempting to run a known-idempotent query, and
not inside a transaction, it is safe to immediately reconnect to the
database server and try again, so this is now the default behavior.
This new default should always be safe -- to support that, it's consciously
conservative about which queries are considered idempotent -- but if
necessary it can be disabled by setting the connection_retries connection
option to 0.
Matthew Draper
Avoid removing a PostgreSQL extension when there are dependent objects.
Previously, removing an extension also implicitly removed dependent objects. Now, this will raise an error.
You can force removing the extension:
```
disable_extension :citext, force: :cascade
```
Fixes #29091.
fatkodima
Allow nested functions as safe SQL string
Michael Siegfried
Allow destroy_association_async_job= to be configured with a class string instead of a constant.
Defers an autoloading dependency between ActiveRecord::Base and ActiveJob::Base
and moves the configuration of ActiveRecord::DestroyAssociationAsyncJob
from ActiveJob to ActiveRecord.
Deprecates ActiveRecord::ActiveJobRequiredError and now raises a NameError
if the job class is unloadable or an ActiveRecord::ConfigurationError if
dependent: :destroy_async is declared on an association but there is no job
class configured.
Ben Sheldon
Fix ActiveRecord::Store to serialize as a regular Hash
Previously it would serialize as an ActiveSupport::HashWithIndifferentAccess
which is wasteful and cause problem with YAML safe_load.
Jean Boussier
Add timestamptz as a time zone aware type for PostgreSQL
This is required for correctly parsing timestamp with time zone values in your database.
If you don't want this, you can opt out by adding this initializer:
```
ActiveRecord::Base.time_zone_aware_types -= [:timestamptz]
```
Alex Ghiculescu

Add new ActiveRecord::Base.generates_token_for API.

Currently, signed_id fulfills the role of generating tokens for e.g.
resetting a password. However, signed IDs cannot reflect record state, so
if a token is intended to be single-use, it must be tracked in a database at
least until it expires.

With generates_token_for, a token can embed data from a record. When
using the token to fetch the record, the data from the token and the current
data from the record will be compared. If the two do not match, the token
will be treated as invalid, the same as if it had expired. For example:

class User < ActiveRecord::Base
  has_secure_password

  generates_token_for :password_reset, expires_in: 15.minutes do
    # A password's BCrypt salt changes when the password is updated.
    # By embedding (part of) the salt in a token, the token will
    # expire when the password is updated.
    BCrypt::Password.new(password_digest).salt[-10..]
  end
end

user = User.first
token = user.generate_token_for(:password_reset)

User.find_by_token_for(:password_reset, token) # => user

user.update!(password: "new password")
User.find_by_token_for(:password_reset, token) # => nil

Jonathan Hefner

Optimize Active Record batching for whole table iterations.
Previously, in_batches got all the ids and constructed an IN-based query for each batch.
When iterating over the whole tables, this approach is not optimal as it loads unneeded ids and
IN queries with lots of items are slow.
Now, whole table iterations use range iteration (id >= x AND id <= y) by default which can make iteration
several times faster. E.g., tested on a PostgreSQL table with 10 million records: querying (253s vs 30s),
updating (288s vs 124s), deleting (268s vs 83s).
Only whole table iterations use this style of iteration by default. You can disable this behavior by passing use_ranges: false.
If you iterate over the table and the only condition is, e.g., archived_at: nil (and only a tiny fraction
of the records are archived), it makes sense to opt in to this approach:
```
Project.where(archived_at: nil).in_batches(use_ranges: true) do |relation|
  # do something
end
```
See #45414 for more details.
fatkodima

.with query method added. Construct common table expressions with ease and get ActiveRecord::Relation back.

Post.with(posts_with_comments: Post.where("comments_count > ?", 0))
# => ActiveRecord::Relation
# WITH posts_with_comments AS (SELECT * FROM posts WHERE (comments_count > 0)) SELECT * FROM posts

Vlado Cingel

Don't establish a new connection if an identical pool exists already.
Previously, if establish_connection was called on a class that already had an established connection, the existing connection would be removed regardless of whether it was the same config. Now if a pool is found with the same values as the new connection, the existing connection will be returned instead of creating a new one.
This has a slight change in behavior if application code is depending on a new connection being established regardless of whether it's identical to an existing connection. If the old behavior is desirable, applications should call ActiveRecord::Base#remove_connection before establishing a new one. Calling establish_connection with a different config works the same way as it did previously.
Eileen M. Uchitelle
Update db:prepare task to load schema when an uninitialized database exists, and dump schema after migrations.
Ben Sheldon

Fix supporting timezone awareness for tsrange and tstzrange array columns.

# In database migrations
add_column :shops, :open_hours, :tsrange, array: true
# In app config
ActiveRecord::Base.time_zone_aware_types += [:tsrange]
# In the code times are properly converted to app time zone
Shop.create!(open_hours: [Time.current..8.hour.from_now])

Wojciech Wnętrzak

Introduce strategy pattern for executing migrations.
By default, migrations will use a strategy object that delegates the method
to the connection adapter. Consumers can implement custom strategy objects
to change how their migrations run.
Adrianna Chang
Add adapter option disallowing foreign keys
This adds a new option to be added to database.yml which enables skipping
foreign key constraints usage even if the underlying database supports them.
Usage:
```
development:
    <<: *default
    database: storage/development.sqlite3
    foreign_keys: false
```
Paulo Barros
Add configurable deprecation warning for singular associations
This adds a deprecation warning when using the plural name of a singular associations in where.
It is possible to opt into the new more performant behavior with config.active_record.allow_deprecated_singular_associations_name = false
Adam Hess
Run transactional callbacks on the freshest instance to save a given
record within a transaction.
When multiple Active Record instances change the same record within a
transaction, Rails runs after_commit or after_rollback callbacks for
only one of them. config.active_record.run_commit_callbacks_on_first_saved_instances_in_transaction
was added to specify how Rails chooses which instance receives the
callbacks. The framework defaults were changed to use the new logic.
When config.active_record.run_commit_callbacks_on_first_saved_instances_in_transaction
is true, transactional callbacks are run on the first instance to save,
even though its instance state may be stale.
When it is false, which is the new framework default starting with version
7.1, transactional callbacks are run on the instances with the freshest
instance state. Those instances are chosen as follows:
- In general, run transactional callbacks on the last instance to save a
  given record within the transaction.
- There are two exceptions:
  - If the record is created within the transaction, then updated by
    another instance, after_create_commit callbacks will be run on the
    second instance. This is instead of the after_update_commit
    callbacks that would naively be run based on that instance’s state.
  - If the record is destroyed within the transaction, then
    after_destroy_commit callbacks will be fired on the last destroyed
    instance, even if a stale instance subsequently performed an update
    (which will have affected 0 rows).
Cameron Bothner and Mitch Vollebregt
Enable strict strings mode for SQLite3Adapter.
Configures SQLite with a strict strings mode, which disables double-quoted string literals.
SQLite has some quirks around double-quoted string literals.
It first tries to consider double-quoted strings as identifier names, but if they don't exist
it then considers them as string literals. Because of this, typos can silently go unnoticed.
For example, it is possible to create an index for a non existing column.
See SQLite documentation for more details.
If you don't want this behavior, you can disable it via:
```
# config/application.rb
config.active_record.sqlite3_adapter_strict_strings_by_default = false
```
Fixes #27782.
fatkodima, Jean Boussier
Resolve issue where a relation cache_version could be left stale.
Previously, when reset was called on a relation object it did not reset the cache_versions
ivar. This led to a confusing situation where despite having the correct data the relation
still reported a stale cache_version.
Usage:
```
developers = Developer.all
developers.cache_version

Developer.update_all(updated_at: Time.now.utc + 1.second)

developers.cache_version # Stale cache_version
developers.reset
developers.cache_version # Returns the current correct cache_version
```
Fixes #45341.
Austen Madden

Add support for exclusion constraints (PostgreSQL-only).

add_exclusion_constraint :invoices, "daterange(start_date, end_date) WITH &&", using: :gist, name: "invoices_date_overlap"
remove_exclusion_constraint :invoices, name: "invoices_date_overlap"

See PostgreSQL's CREATE TABLE ... EXCLUDE ... documentation for more on exclusion constraints.

Alex Robbin

change_column_null raises if a non-boolean argument is provided
Previously if you provided a non-boolean argument, change_column_null would
treat it as truthy and make your column nullable. This could be surprising, so now
the input must be either true or false.
```
change_column_null :table, :column, true # good
change_column_null :table, :column, false # good
change_column_null :table, :column, from: true, to: false # raises (previously this made the column nullable)
```
Alex Ghiculescu
Enforce limit on table names length.
Fixes #45130.
fatkodima
Adjust the minimum MariaDB version for check constraints support.
Eddie Lebow
Fix Hstore deserialize regression.
edsharp

Add validity for PostgreSQL indexes.

connection.index_exists?(:users, :email, valid: true)
connection.indexes(:users).select(&:valid?)

fatkodima

Fix eager loading for models without primary keys.
Anmol Chopra, Matt Lawrence, and Jonathan Hefner
Avoid validating a unique field if it has not changed and is backed by a unique index.
Previously, when saving a record, Active Record will perform an extra query to check for the
uniqueness of each attribute having a uniqueness validation, even if that attribute hasn't changed.
If the database has the corresponding unique index, then this validation can never fail for persisted
records, and we could safely skip it.
fatkodima
Stop setting sql_auto_is_null
Since version 5.5 the default has been off, we no longer have to manually turn it off.
Adam Hess
Fix touch to raise an error for readonly columns.
fatkodima
Add ability to ignore tables by regexp for SQL schema dumps.
```
ActiveRecord::SchemaDumper.ignore_tables = [/^_/]
```
fatkodima
Avoid queries when performing calculations on contradictory relations.
Previously calculations would make a query even when passed a
contradiction, such as User.where(id: []).count. We no longer perform a
query in that scenario.
This applies to the following calculations: count, sum, average,
minimum and maximum
Luan Vieira, John Hawthorn and Daniel Colson

Allow using aliased attributes with insert_all/upsert_all.

class Book < ApplicationRecord
  alias_attribute :title, :name
end

Book.insert_all [{ title: "Remote", author_id: 1 }], returning: :title

fatkodima

Support encrypted attributes on columns with default db values.
This adds support for encrypted attributes defined on columns with default values.
It will encrypt those values at creation time. Before, it would raise an
error unless config.active_record.encryption.support_unencrypted_data was true.
Jorge Manrubia and Dima Fatko
Allow overriding reading_request? in DatabaseSelector::Resolver
The default implementation checks if a request is a get? or head?,
but you can now change it to anything you like. If the method returns true,
Resolver#read gets called meaning the request could be served by the
replica database.
Alex Ghiculescu
Remove ActiveRecord.legacy_connection_handling.
Eileen M. Uchitelle
rails db:schema:{dump,load} now checks ENV["SCHEMA_FORMAT"] before config
Since rails db:structure:{dump,load} was deprecated there wasn't a simple
way to dump a schema to both SQL and Ruby formats. You can now do this with
an environment variable. For example:
```
SCHEMA_FORMAT=sql rake db:schema:dump
```
Alex Ghiculescu
Fixed MariaDB default function support.
Defaults would be written wrong in "db/schema.rb" and not work correctly
if using db:schema:load. Further more the function name would be
added as string content when saving new records.
kaspernj
Add active_record.destroy_association_async_batch_size configuration
This allows applications to specify the maximum number of records that will
be destroyed in a single background job by the dependent: :destroy_async
association option. By default, the current behavior will remain the same:
when a parent record is destroyed, all dependent records will be destroyed
in a single background job. If the number of dependent records is greater
than this configuration, the records will be destroyed in multiple
background jobs.
Nick Holden
Fix remove_foreign_key with :if_exists option when foreign key actually exists.
fatkodima
Remove --no-comments flag in structure dumps for PostgreSQL
This broke some apps that used custom schema comments. If you don't want
comments in your structure dump, you can use:
```
ActiveRecord::Tasks::DatabaseTasks.structure_dump_flags = ['--no-comments']
```
Alex Ghiculescu
Reduce the memory footprint of fixtures accessors.
Until now fixtures accessors were eagerly defined using define_method.
So the memory usage was directly dependent of the number of fixtures and
test suites.
Instead fixtures accessors are now implemented with method_missing,
so they incur much less memory and CPU overhead.
Jean Boussier
Fix config.active_record.destroy_association_async_job configuration
config.active_record.destroy_association_async_job should allow
applications to specify the job that will be used to destroy associated
records in the background for has_many associations with the
dependent: :destroy_async option. Previously, that was ignored, which
meant the default ActiveRecord::DestroyAssociationAsyncJob always
destroyed records in the background.
Nick Holden
Fix change_column_comment to preserve column's AUTO_INCREMENT in the MySQL adapter
fatkodima
Fix quoting of ActiveSupport::Duration and Rational numbers in the MySQL adapter.
Kevin McPhillips
Allow column name with COLLATE (e.g., title COLLATE "C") as safe SQL string
Shugo Maeda
Permit underscores in the VERSION argument to database rake tasks.
Eddie Lebow
Reversed the order of INSERT statements in structure.sql dumps
This should decrease the likelihood of merge conflicts. New migrations
will now be added at the top of the list.
For existing apps, there will be a large diff the next time structure.sql
is generated.
Alex Ghiculescu, Matt Larraz
Fix PG.connect keyword arguments deprecation warning on ruby 2.7
Fixes #44307.
Nikita Vasilevsky
Fix dropping DB connections after serialization failures and deadlocks.
Prior to 6.1.4, serialization failures and deadlocks caused rollbacks to be
issued for both real transactions and savepoints. This breaks MySQL which
disallows rollbacks of savepoints following a deadlock.
6.1.4 removed these rollbacks, for both transactions and savepoints, causing
the DB connection to be left in an unknown state and thus discarded.
These rollbacks are now restored, except for savepoints on MySQL.
Thomas Morgan
Make ActiveRecord::ConnectionPool Fiber-safe
When ActiveSupport::IsolatedExecutionState.isolation_level is set to :fiber,
the connection pool now supports multiple Fibers from the same Thread checking
out connections from the pool.
Alex Matchneer

Add update_attribute! to ActiveRecord::Persistence

Similar to update_attribute, but raises ActiveRecord::RecordNotSaved when a before_* callback throws :abort.

class Topic < ActiveRecord::Base
  before_save :check_title

  def check_title
    throw(:abort) if title == "abort"
  end
end

topic = Topic.create(title: "Test Title")
# #=> #<Topic title: "Test Title">
topic.update_attribute!(:title, "Another Title")
# #=> #<Topic title: "Another Title">
topic.update_attribute!(:title, "abort")
# raises ActiveRecord::RecordNotSaved

Drew Tempelmeyer

Avoid loading every record in ActiveRecord::Relation#pretty_print

# Before
pp Foo.all # Loads the whole table.

# After
pp Foo.all # Shows 10 items and an ellipsis.

Ulysse Buonomo

Change QueryMethods#in_order_of to drop records not listed in values.
in_order_of now filters down to the values provided, to match the behavior of the Enumerable version.
Kevin Newton
Allow named expression indexes to be revertible.
Previously, the following code would raise an error in a reversible migration executed while rolling back, due to the index name not being used in the index removal.
```
add_index(:settings, "(data->'property')", using: :gin, name: :index_settings_data_property)
```
Fixes #43331.
Oliver Günther
Fix incorrect argument in PostgreSQL structure dump tasks.
Updating the --no-comment argument added in Rails 7 to the correct --no-comments argument.
Alex Dent
Fix migration compatibility to create SQLite references/belongs_to column as integer when migration version is 6.0.
Reference/belongs_to in migrations with version 6.0 were creating columns as
bigint instead of integer for the SQLite Adapter.
Marcelo Lauxen
Fix QueryMethods#in_order_of to handle empty order list.
```
Post.in_order_of(:id, []).to_a
```
Also more explicitly set the column as secondary order, so that any other
value is still ordered.
Jean Boussier

Fix quoting of column aliases generated by calculation methods.

Since the alias is derived from the table name, we can't assume the result
is a valid identifier.

class Test < ActiveRecord::Base
  self.table_name = '1abc'
end
Test.group(:id).count
# syntax error at or near "1" (ActiveRecord::StatementInvalid)
# LINE 1: SELECT COUNT(*) AS count_all, "1abc"."id" AS 1abc_id FROM "1...

Jean Boussier

Add authenticate_by when using has_secure_password.
authenticate_by is intended to replace code like the following, which
returns early when a user with a matching email is not found:
```
User.find_by(email: "...")&.authenticate("...")
```
Such code is vulnerable to timing-based enumeration attacks, wherein an
attacker can determine if a user account with a given email exists. After
confirming that an account exists, the attacker can try passwords associated
with that email address from other leaked databases, in case the user
re-used a password across multiple sites (a common practice). Additionally,
knowing an account email address allows the attacker to attempt a targeted
phishing ("spear phishing") attack.
authenticate_by addresses the vulnerability by taking the same amount of
time regardless of whether a user with a matching email is found:
```
User.authenticate_by(email: "...", password: "...")
```
Jonathan Hefner

Action View

Introduce ActionView::TestCase.register_parser

register_parser :rss, -> rendered { RSS::Parser.parse(rendered) }

test "renders RSS" do
  article = Article.create!(title: "Hello, world")

  render formats: :rss, partial: article

  assert_equal "Hello, world", rendered.rss.items.last.title
end

By default, register parsers for :html and :json.

Sean Doyle

Fix simple_format with blank wrapper_tag option returns plain html tag
By default simple_format method returns the text wrapped with <p>. But if we explicitly specify
the wrapper_tag: nil in the options, it returns the text wrapped with <></> tag.
Before:
```
simple_format("Hello World", {},  { wrapper_tag: nil })
# <>Hello World</>
```
After:
```
simple_format("Hello World", {},  { wrapper_tag: nil })
# <p>Hello World</p>
`
```