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diff --git a/guides/source/5_0_release_notes.md b/guides/source/5_0_release_notes.md
index f45c8005da..dc631e5cb9 100644
--- a/guides/source/5_0_release_notes.md
+++ b/guides/source/5_0_release_notes.md
@@ -256,6 +256,12 @@ Please refer to the [Changelog][action-pack] for detailed changes.
* Rails will only generate "weak", instead of strong ETags.
([Pull Request](https://github.com/rails/rails/pull/17573))
+* Controller actions without an explicit `render` call and with no
+ corresponding templates will render `head :no_content` implicitly
+ instead of raising an error.
+ (Pull Request [1](https://github.com/rails/rails/pull/19377),
+ [2](https://github.com/rails/rails/pull/23827))
+
Action View
-------------
@@ -294,6 +300,9 @@ Please refer to the [Changelog][action-view] for detailed changes.
button on submit to prevent double submits.
([Pull Request](https://github.com/rails/rails/pull/21135))
+* Downcase model name in form submit tags rather than humanize.
+ ([Pull Request](https://github.com/rails/rails/pull/22764))
+
Action Mailer
-------------
@@ -313,6 +322,9 @@ Please refer to the [Changelog][action-mailer] for detailed changes.
* Template lookup now respects default locale and I18n fallbacks.
([commit](https://github.com/rails/rails/commit/ecb1981b))
+* Template can use fragment cache like Action View template.
+ ([Pull Request](https://github.com/rails/rails/pull/22825))
+
* Added `_mailer` suffix to mailers created via generator, following the same
naming convention used in controllers and jobs.
([Pull Request](https://github.com/rails/rails/pull/18074))
@@ -324,6 +336,9 @@ Please refer to the [Changelog][action-mailer] for detailed changes.
the mailer queue name.
([Pull Request](https://github.com/rails/rails/pull/18587))
+* Added `config.action_mailer.perform_caching` configuration to determine whether your templates should perform caching or not.
+ ([Pull Request](https://github.com/rails/rails/pull/22825))
+
Active Record
-------------
@@ -381,6 +396,9 @@ Please refer to the [Changelog][active-record] for detailed changes.
* Removed support for the `protected_attributes` gem.
([commit](https://github.com/rails/rails/commit/f4fbc0301021f13ae05c8e941c8efc4ae351fdf9))
+* Removed support for PostgreSQL versions below 9.1.
+ ([Pull Request](https://github.com/rails/rails/pull/23434))
+
### Deprecations
* Deprecated passing a class as a value in a query. Users should pass strings
@@ -702,7 +720,7 @@ Please refer to the [Changelog][active-support] for detailed changes.
* Changed the default test order from `:sorted` to `:random`.
([commit](https://github.com/rails/rails/commit/5f777e4b5ee2e3e8e6fd0e2a208ec2a4d25a960d))
-* Added `#on_weekend?`, `#next_weekday`, `#prev_weekday` methods to `Date`,
+* Added `#on_weekend?`, `#on_weekday?`, `#next_weekday`, `#prev_weekday` methods to `Date`,
`Time`, and `DateTime`.
([Pull Request](https://github.com/rails/rails/pull/18335))
@@ -765,6 +783,7 @@ framework it is. Kudos to all of them.
[action-pack]: https://github.com/rails/rails/blob/5-0-stable/actionpack/CHANGELOG.md
[action-view]: https://github.com/rails/rails/blob/5-0-stable/actionview/CHANGELOG.md
[action-mailer]: https://github.com/rails/rails/blob/5-0-stable/actionmailer/CHANGELOG.md
+[action-cable]: https://github.com/rails/rails/blob/5-0-stable/actioncable/CHANGELOG.md
[active-record]: https://github.com/rails/rails/blob/5-0-stable/activerecord/CHANGELOG.md
[active-model]: https://github.com/rails/rails/blob/5-0-stable/activemodel/CHANGELOG.md
[active-support]: https://github.com/rails/rails/blob/5-0-stable/activesupport/CHANGELOG.md