Fix "Ruby on Rails 5.2 Release Notes" [ci skip]
- Remove
```
* Namespace error pages' CSS selectors to stop the styles from bleeding
into other pages when using Turbolinks.
([Pull Request](https://github.com/rails/rails/pull/28814))
```
since it was backported to
`5-1-stable` by 50d5baf7
and
`5-0-stable` by d1c4a39e.
- Remove
```
* Allow irb options to be passed from `rails console` command.
([Pull Request](https://github.com/rails/rails/pull/29010))
```
since it was backported to
`5-1-stable` by e91b4834.
- Remove
```
* Load environment file in `dbconsole` command.
([Pull Request](https://github.com/rails/rails/pull/29725))
```
since it was backported to
`5-1-stable` by 7f934287.
- Remove
```
* Gemfile for new apps: upgrade redis-rb from ~> 3.0 to 4.0.
([Pull Request](https://github.com/rails/rails/pull/30748))
```
since it was backported to
`5-1-stable` by 37895311.
- Remove
```
* Fix minitest rails plugin.
The custom reporters are added only if needed.
This will fix conflicts with others plugins.
([Commit](https://github.com/rails/rails/commit/ac99916fcf7bf27bb1519d4f7387c6b4c5f0463d))
```
since it was backported to
`5-1-stable` by caa76956.
- Remove
```
* Add support for compatibility with redis-rb gem for 4.0 version.
([Pull Request](https://github.com/rails/rails/pull/30748))
```
since it was backported to
`5-1-stable` by 37895311.
- Remove
```
* Add `action_controller_api` and `action_controller_base` load hooks to be
called in `ActiveSupport.on_load`.
([Pull Request](https://github.com/rails/rails/pull/28402))
```
since it was backported to
`5-1-stable` by b9a5fd70.
- Remove
```
* `driven_by` now registers poltergeist and capybara-webkit.
([Pull Request](https://github.com/rails/rails/pull/29315))
```
since it was backported to
`5-1-stable` by c5dd4511.
- Remove
```
* Fallback `ActionController::Parameters#to_s` to `Hash#to_s`.
([Pull Request](https://github.com/rails/rails/pull/29630))
```
since it was backported to
`5-1-stable` by c1014e43
and
`5-0-stable` by 0e71fc30.
- Remove
```
* Make `take_failed_screenshot` work within engine.
([Pull Request](https://github.com/rails/rails/pull/30421))
```
since it was backported to
`5-1-stable` by 595a2310.
- Remove
```
* Fix optimized url helpers when using relative url root.
([Pull Request](https://github.com/rails/rails/pull/31261))
```
since it was backported to
`5-1-stable` by e9b77953.
- Remove
```
* Update `distance_of_time_in_words` helper to display better error messages
for bad input.
([Pull Request](https://github.com/rails/rails/pull/20701))
```
since it was backported to
`5-1-stable` by 2c97fbf6.
- Remove
```
* Generate field ids in `collection_check_boxes` and
`collection_radio_buttons`.
([Pull Request](https://github.com/rails/rails/pull/29412))
```
since it was backported to
`5-1-stable` by 2d8c10a7.
- Remove
```
* Fix issues with scopes and engine on `current_page?` method.
([Pull Request](https://github.com/rails/rails/pull/29503))
```
since it was backported to
`5-1-stable` by 2135daf0.
- Remove
```
* Bring back proc with arity of 1 in `ActionMailer::Base.default` proc
since it was supported in Rails 5.0 but not deprecated.
([Pull Request](https://github.com/rails/rails/pull/30391))
```
since it was backported to
`5-1-stable` by b2bedb14.
- Remove
```
* Add type caster to `RuntimeReflection#alias_name`.
([Pull Request](https://github.com/rails/rails/pull/28961))
```
since it was backported to
`5-1-stable` by f644e7a6.
- Remove
```
* Loading model schema from database is now thread-safe.
([Pull Request](https://github.com/rails/rails/pull/29216))
```
since it was backported to
`5-1-stable` by 02926cff.
and
`5-0-stable` by 84bcfe5a
- Remove
```
* Fix destroying existing object does not work well when optimistic locking
enabled and `locking_column` is null in the database.
([Pull Request](https://github.com/rails/rails/pull/28926))
```
since it was backported to
`5-1-stable` by e498052c.
- Remove
```
* `ActiveRecord::Persistence#touch` does not work well
when optimistic locking enabled and `locking_column`,
without default value, is null in the database.
([Pull Request](https://github.com/rails/rails/pull/28914))
```
since it was backported to
`5-1-stable` by 1e2f63db.
- Remove
```
* Previously, when building records using a `has_many :through` association,
if the child records were deleted before the parent was saved,
they would still be persisted. Now, if child records are deleted
before the parent is saved on a `has_many :through` association,
the child records will not be persisted.
([Pull Request](https://github.com/rails/rails/pull/29593))
```
since it was backported to
`5-1-stable` by a22c39e9.
- Remove
```
* Query cache was unavailable when entering the `ActiveRecord::Base.cache`
block without being connected.
([Pull Request](https://github.com/rails/rails/pull/29609))
```
since it was backported to
`5-1-stable` by fd6c8cdf
and
`5-0-stable` by 9f2532bb.
- Remove
```
* `Relation#joins` is no longer affected by the target model's
`current_scope`, with the exception of `unscoped`.
([Commit](https://github.com/rails/rails/commit/5c71000d086cc42516934415b79380c2224e1614))
```
since it was backported to
`5-1-stable` by 3630d635.
- Remove
```
* Fix `unscoped(where: [columns])` removing the wrong bind values.
([Pull Request](https://github.com/rails/rails/pull/29780))
```
since it was backported to
`5-1-stable` by d378fcb2.
- Remove
```
* When a `has_one` association is destroyed by `dependent: destroy`,
`destroyed_by_association` will now be set to the reflection, matching the
behaviour of `has_many` associations.
([Pull Request](https://github.com/rails/rails/pull/29855))
```
since it was backported to
`5-1-stable` by 8254a8be.
- Remove
```
* Fix `COUNT(DISTINCT ...)` with `ORDER BY` and `LIMIT`
to keep the existing select list.
([Pull Request](https://github.com/rails/rails/pull/29848))
```
since it was backported to
`5-1-stable` by 0e8d4edd.
- Remove
```
* Ensure `sum` honors `distinct` on `has_many :through` associations.
([Commit](https://github.com/rails/rails/commit/566f1fd068711dfe557bef63406f8dd6d41d473d))
```
since it was backported to
`5-1-stable` by c0a1dc25.
- Remove
```
* Fix `COUNT(DISTINCT ...)` for `GROUP BY` with `ORDER BY` and `LIMIT`.
([Commit](https://github.com/rails/rails/commit/5668dc6b1863ef43be8f8ef0fb1d5db913085fb3))
```
since it was backported to
`5-1-stable` by 87ca68e7.
- Remove
```
* MySQL: Don't lose `auto_increment: true` in the `db/schema.rb`.
([Commit](https://github.com/rails/rails/commit/9493d4553569118b2a85da84fd3a8ba2b5b2de76))
```
since it was backported to
`5-1-stable` by 8b6e694e.
- Remove
```
* Fix longer sequence name detection for serial columns.
([Pull Request](https://github.com/rails/rails/pull/28339))
```
since it was backported to
`5-1-stable` by af9c1707
and
`5-0-stable` by 7025b1d8.
- Remove
```
* Fix `bin/rails db:setup` and `bin/rails db:test:prepare` create wrong
ar_internal_metadata's data for a test database.
([Pull Request](https://github.com/rails/rails/pull/30579))
```
since it was backported to
`5-1-stable` by bb67b5f2
and
`5-0-stable` by 60437e6d.
- Remove
```
* Fix conflicts `counter_cache` with `touch: true` by optimistic locking.
([Pull Request](https://github.com/rails/rails/pull/31405))
```
since it was backported to
`5-1-stable` by 5236ddaf.
- Remove
```
* Fix `count(:all)` to correctly work `distinct` with custom SELECT list.
([Commit](https://github.com/rails/rails/commit/c6cd9a59f200863ccfe8ad1d9c5a8876c39b9c5c))
```
since it was backported to
`5-1-stable` by 6beb4de7.
- Remove
```
* Fix to invoke callbacks when using `update_attribute`.
([Commit](https://github.com/rails/rails/commit/732aa34b6e6459ad66a3d3ad107cfff75cc45160))
```
since it was backported to
`5-1-stable` by 6346683b.
- Remove
```
* Use `count(:all)` in `HasManyAssociation#count_records` to prevent invalid
SQL queries for association counting.
([Pull Request](https://github.com/rails/rails/pull/27561))
```
since it was backported to
`5-1-stable` by eef3c89e.
- Remove
```
* Fix `count(:all)` with eager loading and having an order other than
the driving table.
([Commit](https://github.com/rails/rails/commit/ebc09ed9ad9a04338138739226a1a92c7a2707ee))
```
since it was backported to
`5-1-stable` by 6df9b69b.
- Remove
```
* PostgreSQL: Allow pg-1.0 gem to be used with Active Record.
([Pull Request](https://github.com/rails/rails/pull/31671))
```
since it was backported to
`5-1-stable` by a9c06f61.
- Remove
```
* Fix that after commit callbacks on update does not triggered
when optimistic locking is enabled.
([Commit](https://github.com/rails/rails/commit/7f9bd034c485c2425ae0164ff5d6374834e3aa1d))
```
since it was backported to
`5-1-stable` by aaee10e6.
- Remove
```
* Fix regression in numericality validator when comparing Decimal and Float
input values with more scale than the schema.
([Pull Request](https://github.com/rails/rails/pull/28584))
```
since it was backported to
`5-1-stable` by 5b1c3e5a.
Note that there was incorrect link to PR,
original PR is https://github.com/rails/rails/pull/29249.
- Remove
```
* Fix to working before/after validation callbacks on multiple contexts.
([Pull Request](https://github.com/rails/rails/pull/31483))
```
since it was backported to
`5-1-stable` by 0f7046a7.
- Remove
```
* Fix implicit coercion calculations with scalars and durations.
([Pull Request](https://github.com/rails/rails/pull/29163),
[Pull Request](https://github.com/rails/rails/pull/29971))
```
since it was backported to
`5-1-stable` by 51ea27c0,
4d82e2aa.
- Remove
```
* Fix modulo operations involving durations.
([Commit](https://github.com/rails/rails/commit/a54e13bd2e8fb4d6aa0aebe59271699a2d62567b))
```
since it was backported to
`5-1-stable` by 233fa7ea.
- Remove
```
* Return all mappings for a timezone identifier in `country_zones`.
([Commit](https://github.com/rails/rails/commit/cdce6a709e1cbc98fff009effc3b1b3ce4c7e8db))
```
since it was backported to
`5-1-stable` by 0222ebbe.
- Remove
```
* Add support for compatibility with redis-rb gem for 4.0 version.
([Pull Request](https://github.com/rails/rails/pull/30748))
```
since it was backported to
`5-1-stable` by 37895311.
Related to #32252.
Related to #32222, https://github.com/rails/rails/pull/32222#discussion_r174256536.
Follow up a489cc81.
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