Performance improvements, collection cache versioning and more

Hello. This is Wojtek reporting on recent changes from Rails world.

Collection cache versioning

Add cache_version on relation to support recyclable cache keys via the versioned entries in ActiveSupport::Cache. This also means that cache_key will now return a stable key that does not include the max timestamp or count any more.

Speed up dirty tracking

Reports 2x ~ 30x faster execution time compared to original implementation.

Add dirty methods for store accessors

It is now possible to use methods defined by Dirty module on store accessors.

Add after_save_commit callback shortcut

Adds shortcut for very common case:

after_commit :hook, on: [ :create, :update ]

Notes tags registration

It is now possible to register custom tags that will be included on bin/rails notes command.

Add db:prepare rake task

Based on state of database it runs setup or migrate tasks.

Add detach_from to ActiveSupport::Subscriber

It is now possible to opt-out from listening on chosen events.

Factorize bin/update in bin/setup

Replaced two files with one. From now on bin/setup should be idempotent in the project, thus should run fine on the first time setup and after any update.

71 people contributed to Rails in the last 3 weeks. You can see the full list of changes here.

Until next time!

New versions of Rails, optimizer hints, ROFL, and more

Hi there! This is Daniel reporting from Brooklyn, NY.

New versions of Rails released

Rails 5.2.3 and Rails 5.1.7 were released last week. Check out the CHANGELOG and upgrade today!

Optimizer Hints and Annotations

These two related PRs were opened within a couple hours of each other. The new optimizer_hints method offers a simple way to include optimizer hints in your queries. The new annotate method offers a simple way to annotate your queries with comments.

The best PR that I saw this year!

This PR elegantly ensures that ActiveSupport::SafeBuffer’s sub, sub!, gsub, and gsub! methods set back references. I learned a lot about Ruby by reading through this code and the review comments.

Stop ROFL

I always enjoy removing code that is no longer needed. It must be especially fun to remove code that includes the comment “I will explain the roflscale so that others will not rm this code.”

Use weak references in the descendants tracker

Nobody wants a memory leak. Keeping track of these references allows us to garbage collect anonymous subclasses.

Advancing to dates before 1001-03-07

I am constantly plagued by bugs related to time. This PR reminds me how complicated time really is.

Allow disabling of console sandbox

Has anybody else ever opened a production console session and fogotten to close it? ✋ Ever done it with the --sandbox flag and caused your database to run out of memory? 😭 Thanks, Rails, for protecting me against myself.

Improved error messages from views

Thinking about contributing to Rails? Check out this PR from a first-time contributor for inspiration.

55 people contributed to Rails in the last 2 weeks, including 6 first-time contributors. You can see the full list of changes here.

Rails 5.2.3 has been released

Hi everyone,

I am happy to announce that Rails 5.2.3 has been released.

CHANGES since 5.2.2

To view the changes for each gem, please read the changelogs on GitHub:

To see a summary of changes, please read the release on GitHub:

5.2.3 CHANGELOG

Full listing

To see the full list of changes, check out all the commits on GitHub.

SHA-256

If you’d like to verify that your gem is the same as the one I’ve uploaded, please use these SHA-256 hashes.

Here are the checksums for 5.2.3:

$ shasum -a 256 *-5.2.3.gem
755e335b8b064592717157057a647ba1c4d519be2a912f11c3993e8d5c4e8d13  actioncable-5.2.3.gem
8a6fbf3f52243cdc194c289a417856355899bcc99ec2868300a2b26f40f58a96  actionmailer-5.2.3.gem
81830a59e18d7570386a01bb332538ddf0926b5ed7566646ef608a78825751e8  actionpack-5.2.3.gem
9064ef94411d98cf7c7cc0fb179319b92a880f51f8e0671cceaf8081dccb89ec  actionview-5.2.3.gem
faa055b4986b0d3183ebd8169d82ef491dc947e075e777af2f91ead557fc719f  activejob-5.2.3.gem
d04c4367fd41a2d8767be08e9caadc617e6f825025079854562100145b82f055  activemodel-5.2.3.gem
fc6ef79f341d32b5690a7cb5a26245c33c3d2e4a7c99bb7d1c0089549c19c034  activerecord-5.2.3.gem
53eafa1e02a3c99367ffdf81e6f0f337a7d456e1a85e14cf182e702c6f343a12  activestorage-5.2.3.gem
2856b0036869e89043f5c870a1a99d2c811785130fea4affad83cf971db91b84  activesupport-5.2.3.gem
f9b51b66a91d556d63d36d04449ecc23867683f99531db21eb7a263be2d7ecdc  rails-5.2.3.gem
042388decffb47dab796e4ddb30a2d615047d7c334de7fe47208545e1677c9be  railties-5.2.3.gem

As always, huge thanks to the many contributors who helped with this release.

Rails 5.1.7 has been released

Hi everyone,

I am happy to announce that Rails 5.1.7 has been released.

CHANGES since 5.1.6

To view the changes for each gem, please read the changelogs on GitHub:

To see a summary of changes, please read the release on GitHub:

5.1.7 CHANGELOG

Full listing

To see the full list of changes, check out all the commits on GitHub.

SHA-256

If you’d like to verify that your gem is the same as the one I’ve uploaded, please use these SHA-256 hashes.

Here are the checksums for 5.1.7:

$ shasum -a 256 *-5.1.7.gem
c344a1b4edd4108b93b341343106e73466d8bbf0a79c926a62c74f6b22984ec1  actioncable-5.1.7.gem
f053e043f0e83b7758b56af7fe21aa3ab2f61787e2edc6a1198acc8d3645fbbe  actionmailer-5.1.7.gem
a2406a8346f95294ad9342c1535e2cc4f04e7c084e71359bae224650581bd17f  actionpack-5.1.7.gem
871ca9cae0524e937543510104555c1e8d87f180b14ce0a03fe62c69012a5244  actionview-5.1.7.gem
f44a4691d7fca6b0f08c2dbd5c81110f428d5c8ade9c6a6b8e09c7984741a55c  activejob-5.1.7.gem
709bb03d9c950353e8f70e0ed4f12154c346d492e5bf6ea53b515413c740fc1e  activemodel-5.1.7.gem
5a1f4bf7b5e5c05a3e21e9207f1336eab026b3dfd794a37eeee4a4c81cfe8544  activerecord-5.1.7.gem
216db77f40e41dab82328321c375f519de8c898dcc2b88a5319d3608928fd07e  activesupport-5.1.7.gem
8d7f527c446de3f99ec506e6a680c42c38979a44b37beb15f7d451a33e74dcf5  rails-5.1.7.gem
c874ebb682f628cfe075c3b9762d3b2ff1a04585c25a2f4eb3840c4b29d73e72  railties-5.1.7.gem

As always, huge thanks to the many contributors who helped with this release.

Rails 5.1.7.rc1 has been released!

Hi everyone,

I am happy to announce that Rails 5.1.7.rc1 has been released.

This is going to be the final bug fix release for the 5.1 series, so please make sure you test the release candidates to make sure no regressions are found.

If no regressions are found, expect the final release on Wednesday, March 27, 2019. If you find one, please open an issue on GitHub and mention me (@rafaelfranca) on it, so that we can fix it before the final release.

CHANGES since 5.1.6

To view the changes for each gem, please read the changelogs on GitHub:

To see a summary of changes, please read the release on GitHub:

5.1.7.rc1 CHANGELOG

Full listing

To see the full list of changes, check out all the commits on GitHub.

SHA-256

If you’d like to verify that your gem is the same as the one I’ve uploaded, please use these SHA-256 hashes.

Here are the checksums for 5.1.7.rc1:

$ shasum -a 256 *-5.1.7.rc1.gem
4b50c8213b6b4846f35d994991458da797185f9e0ca92063131a59f5890bb5e3  actioncable-5.1.7.rc1.gem
65c84a566b58a4faf10e02abe4dd09f5d7101cfb79896cbf3bfb0d623c06f07b  actionmailer-5.1.7.rc1.gem
8c230b21146c155793c874da49f032be595343df4e8cca59b4be172d10b95e5a  actionpack-5.1.7.rc1.gem
cd9b9acf025c99c113155192622ebb333c729e8a99dea43d91c6016bdb287e0b  actionview-5.1.7.rc1.gem
3308343948ca041b58068c34cc312de1b867f46c8feaf997421ce4e182d8a2e7  activejob-5.1.7.rc1.gem
9ad6fc7f9cb05b5d38462672315b4b05863d263ba46b035367d7e290dc7dd160  activemodel-5.1.7.rc1.gem
4940e5f4c2e4cc1ca8e2d3d41ebf514e5d315e1f39884d518e22e8600b7b0d22  activerecord-5.1.7.rc1.gem
26e956e7b2d16e0783f48ae05e6822da2aabac96ecf1f3b78d6e035145f10b6c  activesupport-5.1.7.rc1.gem
ca0f895446ceece1d904e96bedff90224e715acb9f124b60ffc9ac1b568ed07d  rails-5.1.7.rc1.gem
bbd0b366890da1c6baa3bd68c3132e499f53143351b7ab382c661a0fb9f07ac1  railties-5.1.7.rc1.gem

As always, huge thanks to the many contributors who helped with this release.

Rails 5.2.3.rc1 has been released!

Hi everyone,

I am happy to announce that Rails 5.2.3.rc1 has been released.

If no regressions are found, expect the final release on Wednesday, March 27, 2019. If you find one, please open an issue on GitHub and mention me (@rafaelfranca) on it, so that we can fix it before the final release.

CHANGES since 5.2.2

To view the changes for each gem, please read the changelogs on GitHub:

To see a summary of changes, please read the release on GitHub:

5.2.3.rc1 CHANGELOG

Full listing

To see the full list of changes, check out all the commits on GitHub.

SHA-256

If you’d like to verify that your gem is the same as the one I’ve uploaded, please use these SHA-256 hashes.

Here are the checksums for 5.2.3.rc1:

$ shasum -a 256 *-5.2.3.rc1.gem
353ad8bf6ae456c3392d2d38817263b242eafb8c36a56dc39ef168dba85913cf  actioncable-5.2.3.rc1.gem
489322d94165891a2aa3a5274f54fbba75f06d669d490bd265170356bcf8dd7e  actionmailer-5.2.3.rc1.gem
7b55fa598d3c4826112d482bafb2f34c94457bc142a2989cae56fdd4282212c8  actionpack-5.2.3.rc1.gem
43c69fc7e4f0088d67db47b048785d00568706e5959bd634d9c4b8c59bba6f85  actionview-5.2.3.rc1.gem
350e2e04dc5e18c69f8d9aa2b784bc30c170d4b8ea152fbb3a4a28423b6c639b  activejob-5.2.3.rc1.gem
c4e52ac78e393f30c3f553f772942d0e6b5834baa3046a4c7a5db028f894b414  activemodel-5.2.3.rc1.gem
8c4858ccee67a420f5c4cea16c558e8502eb7fa72808d532dc1ef33586fb23b1  activerecord-5.2.3.rc1.gem
c83e05b7906ae4f9c657d46fc007acb3ef6c2ad602e633980bc22e59a0c7aa5c  activestorage-5.2.3.rc1.gem
88e334741d202bf95ebdf0d8db54b7abb299ecdb6e516d7b5033c19ad6f3dedf  activesupport-5.2.3.rc1.gem
419a56071b85f5496de89810700d6bfab8c373ceb8beccc3052bbb6c8e3fc6b3  rails-5.2.3.rc1.gem
1a907c12473dec3cd543099245d7a23c045d4b52f92eb35f38fee211ee613084  railties-5.2.3.rc1.gem

As always, huge thanks to the many contributors who helped with this release.

Security fixes, bulk insert and upsert, seeds replanting

Hello. This is Wojtek here bringing you the exciting updates from Rails.

Security fix releases of Rails

Rails 4.2.11.1, 5.0.7.2, 5.1.6.2, 5.2.2.1, and 6.0.0.beta3 have been released containing important security fixes. Note that with 6.0 release only Rails 6.x.y and Rails 5.2.x are guaranteed to receive both major and minor security fixes by Rails core.

Active Record adds “insert_all” and “upsert_all” methods

It’s now possible to insert many records at once within one SQL statement. You can check summary of this feature in Josef’s blog post.

Rails command “db:seed:replant” added

Bring back clean state of database seeds with this simple command without redoing the database structure.

Active Support adds Enumerable “including” method

Self-explained by an example:

[ 1, 2, 3 ].including(4, 5) => [ 1, 2, 3, 4, 5 ]

For parity, method without was renamed to excluding.

54 people contributed to Rails in the last 2 weeks. You can see the full list of changes here.

Until next time!

Rails 4.2.11.1, 5.0.7.2, 5.1.6.2, 5.2.2.1, and 6.0.0.beta3 have been released!

Hello everyone!

Rails 4.2.11.1, 5.0.7.2, 5.1.6.2, 5.2.2.1, and 6.0.0.beta3 have been released! These contain the following important security fixes. It is recommended that users upgrade as soon as possible:

Rails 5.2.2.1 and 6.0.0.beta3 also contain the following fix:

The released versions can be found in the usual locations, and you can find a list of changes on GitHub:

If you’re not able to upgrade immediately workarounds have been provided on the advisory pages in the Google Rails Security Group.

We’ve done our best to minimize any impact to your applications, but if you run in to any issues, please file a ticket and we’ll do our best to help!

If you run in to security issues, please follow the reporting process which can be found here.

SHA-256

If you’d like to verify that your gem is the same as the one we’ve uploaded, please use these SHA-256 hashes.

$ shasum -a 256 *4.2.11.1.gem*
5ec3df89a6796f18006198b95e6849ea736bc6170da0daf7d8cec9e388a49ca3  actionmailer-4.2.11.1.gem
50f296dfd8cfbb071fa1008c5157ed22871dbe0ddddc4cc1ec9c1235a66eb466  actionpack-4.2.11.1.gem
373d6065baf091996e0d6d36b99080ceeee323038fcf218ff39f2e839195fb74  actionview-4.2.11.1.gem
b21e40e0c147fc24c939fa1b4b1e3677ffae22b9c125a881ba587a6d7260c14b  activejob-4.2.11.1.gem
63d898086a8d2d0a493ebb4d8c9376c6f9d3dfe846f7aa1f70615a6e5a063db0  activemodel-4.2.11.1.gem
b7e0744484c8a9fe2c123657cfb5bbf678657555eeeeacf0d449ff0f228f3d1e  activerecord-4.2.11.1.gem
264782453d1912cf99f80b6bbf3f2e0e0592874e740e2c66f4dbad02903a78ed  activesupport-4.2.11.1.gem
b4b6536187eab61696358d851e043d60be3fc8313da67815467bb4968a8e9bfb  rails-4.2.11.1.gem
35b430dfd63028401c19dbfe4b319bebd59ea0b5a6b818d85731aa9a7e104eae  railties-4.2.11.1.gem
$ shasum -a 256 *5.0.7.2.gem*
525621c9bde0e729e566e9ebdaf23945cf0cc0b11e731f3f74c7d4d839e97b01  actioncable-5.0.7.2.gem
f5e616088e556244bf6cf6e6236e9a7bbef0d2bd2627b97c19c53096130b4756  actionmailer-5.0.7.2.gem
3ad093d8fcc08163b4ce38136b933c4c38c4973c872b155023fec11523a35eed  actionpack-5.0.7.2.gem
1c52732589d776ba01590233b44c33f679ec62c9bada89ebed3755066eb00823  actionview-5.0.7.2.gem
d122d5414f485713eabd4e5e866b1a238b1179ec5fd33d81cb2c5f6d751ce9df  activejob-5.0.7.2.gem
395d43d408239936668f04cab80bc64b50b08e414fe866664e1bf717e265aaca  activemodel-5.0.7.2.gem
8eb57c48689536545e08b87a6b45b5d2b30a19f1cc06d2772aad9694083ae11a  activerecord-5.0.7.2.gem
bc336a970b5d1c2c2e9e1494afd6ff585680dbab6f12d95acd17ee1be8d6de09  activesupport-5.0.7.2.gem
3ce2eac8fa58ce138e3e2a2fa9b544c8f43128e0c24d0a1d8d751b3a515bb82a  rails-5.0.7.2.gem
4dc24c2dbe4b89ce7c2975cbdb601fcb868de3f1992c00629991033a86059c18  railties-5.0.7.2.gem
$ shasum -a 256 *5.1.6.2.gem*
381b8945ed2bf7aea3e56be8ec6265a9db0e6443d5d1be169484b91ba3041926  actioncable-5.1.6.2.gem
e1c30d19963b365db87daf122620dc9cb006938f0f6d3ac28e0f2da511fd1b6c  actionmailer-5.1.6.2.gem
56c17b7a665a8b1ac816d7ed9fda5d36e605fc4951b0b9455bf464f2ba34d08c  actionpack-5.1.6.2.gem
127da709aa88c749c3723b7fc3b02bbaf22767f1114d4910cc626eba6027e7e5  actionview-5.1.6.2.gem
d6511d6cdf23920bfa1b0062966d5a2468cc8ee705b921e2ef0547bee541c9ac  activejob-5.1.6.2.gem
b324ff341f2410a509e655000206b521fed43ff295de2589eb5eeed18d931985  activemodel-5.1.6.2.gem
3f45f3bbdaf0e6583853393adac564457def668fc26023093e061dc6b977eebd  activerecord-5.1.6.2.gem
ed88feb866ad705e79cd5ca6c8f3dd39d8571df02abf0d10b34889576c93bb4f  activesupport-5.1.6.2.gem
8e721f8e6c7ea0dfd6dbf7fe215f2c40b1de5d104b6cf5d1e1313dc02be640e9  rails-5.1.6.2.gem
a385a8620eb3a5f11c2ac2c2d50cc2dba268dfc0e26b07a566b03a2dbff17ddf  railties-5.1.6.2.gem
$ shasum -a 256 *5.2.2.1.gem*
4125771d4a3c6fb9a38d1617eae08abdb2a0418c2f23d8f891bfa1f3736d15ca  actioncable-5.2.2.1.gem
622e4fae71442c5d7df7e77eeb932f17c27093055a737d4a7a5b4e0d407c4c47  actionmailer-5.2.2.1.gem
8a223ad2f06e51ee624993589b77dc4401645bb3bda3faa5ab04758cf39cab4d  actionpack-5.2.2.1.gem
3f9c1868cd07708bddec82a83f8091d48e6f529bb4c7c25167e428f50aeef278  actionview-5.2.2.1.gem
b8271b919108a743bbd79d6da3d3ee9bcdd7529294175eaf7a16d26caf984251  activejob-5.2.2.1.gem
55d56bcaefcff47d85bfac98d40e57d5ac0b923575abb5fdd0dd6a064f381381  activemodel-5.2.2.1.gem
e21d5ff1f2a0f79aa446e84563978f628c42caf1db7b4804c43e585bf28bb600  activerecord-5.2.2.1.gem
4664ace24b43227a42d943cfc8aae59dbe79091ee70cf7be257b4553e50fd8bf  activestorage-5.2.2.1.gem
d0a7b92b46e34de7cca05ed74d9659b205f91a0a7fda9f2ea5a3f53ae00b2a81  activesupport-5.2.2.1.gem
e45c26eff3d7bdfa989ab884754f25d4a274b4b6324df9d9a4a7168cc32ccbe0  rails-5.2.2.1.gem
44b2cfe87f78cb3069362a15c8c3b49ff5a02ea01d60dd2685e1112a9e01e938  railties-5.2.2.1.gem
$ shasum -a 256 *6.0.0.beta3.gem*
749a4eed1702e463fef97b2dfa0aed961b6a13931f50ac92bcc176b98bb5159e  actioncable-6.0.0.beta3.gem
b7c4936ffa9697a5d6ea397a28d1f67f3847aebe76a8fa717c61f8ee81d3efcc  actionmailbox-6.0.0.beta3.gem
be8af2a7d9af39f4ee0252b5104204c6b36d7d2ca0ac0bdc0063230c247e711a  actionmailer-6.0.0.beta3.gem
7d070d5853f19c685d22a790d6be919356727a281ab2b30c8104c30dc5e045f4  actionpack-6.0.0.beta3.gem
faf1f28e70a9faf04ac2077fb4e2f518ac76a29e8e1c487f3d9658118553eaf0  actiontext-6.0.0.beta3.gem
91c72834addba79ff315c56f2924ee1a8fba99db45c65ccd0406e4b611d7b1a4  actionview-6.0.0.beta3.gem
c8f76f01156bc6542d17e116b4c9971f969f663badacd2e0cf036baaff796ae9  activejob-6.0.0.beta3.gem
3bc73125ba7105391779ee41e929a7d2b989a733efe86c84594654ae26a7e95a  activemodel-6.0.0.beta3.gem
d31e3c6ae3207dd27bc4fed178dd43c592b1a3d42f3df3f0780abbb27e8ea3f1  activerecord-6.0.0.beta3.gem
d4a743473431153c4f502409bb8d9dc57d9252687f85a94a932772eed6f0f95d  activestorage-6.0.0.beta3.gem
7193da2b92e4f9da95e4cfa2a878911cb420f535343613df0398dfe60ff9c868  activesupport-6.0.0.beta3.gem
b08df88e745edaca9b38162e115bc14935bbf6749eaf4809745c9679d7816c07  rails-6.0.0.beta3.gem
24aa0b8df380fc847ae0eb4d951eeb3b4f9d388aff84eab5f7a43c477c423c95  railties-6.0.0.beta3.gem

reselect, negative enum scopes and more!

Why hello there! Tim here bringing you all the latest and greatest from This Week In Rails.

Negative scopes for enum values

Some sugar around enum values allows you to make negative scopes such as

Post.not_drafted # => where.not(status: :drafted)

New method: reselect

Allows you to change a previously set select statement in the same manner to rewhere and reorder, e.g.

Post.select(:title, :body).reselect(:created_at)

#size fixed when using SELECT DISTINCT

#size_ would ignore the DISTINCT in the select, giving a different result to #count. This is now fixed!

Active Storage’s _blob loading fixed

If you attached a has_one_attachment attachment, you may have found that the attachment’s _blob method would have returned nil. This was fixed by assigning the blob when the attachment is assigned.

22 people contributed to Rails since our last issue; you can see the full list of changes here.

Until next week!

Rails 6.0.0 beta2 released

We’re marching one step closer to the final release of Rails 6 with this second beta. We’ve fixed a bunch of issues and added a few minor features, but the big change is switching to Xavier’s new Zeitwerk library for handling autoloading. It’s a big, structural change to how we require dependencies at runtime, and it should remove a bunch of the legacy warts, and the weird gotchas. Xavier wrote up a long piece on it you should check out.

Otherwise things are much the same as they were with the first beta. I encourage you to read the release notes for that to understand the big picture of 6.0.

You can peruse all the 532 commits we’ve made since the first beta.

We are still kinda on track with our published timeline for the final Rails 6.0 release, so consult that plan for your migration planning, but please do help us already by testing your application on beta2! I’d also encourage anyone with a moderate level of Rails experience to start any new app using beta2, rather than the Rails 5.2.x series. Basecamp and Shopify are both already running Rails 6.0.0.beta2 in production. This isn’t some rickety-shack release.

This release, and all releases leading up to Rails 6.0 final, was shepherded by release manager Rafael França with support by Kasper Timm Hansen.

Thanks again to everyone who keeps working on making Rails better!