RepoJournal
Rails @rails
159 wires and counting

$ follow Rails

Keep up with Rails in about 3 minutes: what actually shipped — the commits, pull requests, releases, and security advisories that matter.

or

fair warning: these emails are deeply technical. diffs, version numbers, CVEs, benchmark deltas. if that's not your idea of a good read, this isn't your newsletter.

Folds into your digest — weekly by default, monthly if you prefer. Unsubscribe in one click.

$ status

wire 2026-06-29
stories 31
GitHub RSS Archive Reviews

© 2026 RepoJournal Home Showcase How it works Privacy

$ the-wire · showcase

RAILS FIXES THREE CRITICAL QUERY BUGS OVERNIGHT

By RepoJournal · Filed · About Rails · Composed from the cited sources · methodology

viralpraxis
1 person shipped this
viralpraxis @viralpraxis 1 cited

Rails patched three separate issues where SQL queries were silently producing wrong results: `regroup` was duplicating columns, `distinct.sum` was dropping its deduplication flag in grouped queries, and `week_field` was emitting invalid ISO week strings at year boundaries.

The `regroup` method is documented as shorthand for `unscope(:group).group(fields)`, but it wasn't honoring the deduplication that `group` performs [1]. Call `regroup(:a, :a)` and you'd get a duplicate column; call `unscope(:group).group(:a, :a)` and it would deduplicate. That inconsistency is now fixed [2]. Separately, a grouped sum with distinct was silently dropping the DISTINCT keyword, causing queries to return numerically wrong totals [3]. The ungrouped path was setting the flag correctly; the grouped path wasn't. Both issues are merged. A third fix addresses `week_field` generating invalid week strings at ISO year boundaries [7]. On the bootsnap side, the YAML cache was mutating its own arguments during cache misses, replacing `symbolize_names` with an unsupported `symbolize_keys` parameter that would crash psych [4]. That's patched [5]. CacheStore session deletion also now honors the `drop` option correctly [6].

Action items

References

  1. [1] Deduplicate columns in `regroup` rails/rails ↗
  2. [2] Merge pull request #57897 from 55728/fix-regroup-deduplication rails/rails ↗
  3. [3] Apply DISTINCT to a grouped `sum` rails/rails ↗
  4. [4] Fix `CompileCache::YAML` cache options mutation & `symbolize_{keys,names}` ↗ rails/bootsnap
  5. [5] Merge pull request #558 from viralpraxis/fix-yaml-cache-kwargs-mutation ↗ rails/bootsnap
  6. [6] Merge pull request #57870 from 55728/fix-cache-session-store-honor-drop rails/rails ↗
  7. [7] Merge pull request #57890 from 55728/fix-week-field-iso-week-year rails/rails ↗

$ ls rails/reviews/ # the step-back reads

the week in review Ractor-ready Active Record and Active Job land in Rails the month in review Herb becomes Rails 8.2 default
Full archive → Weekly reviews →

Quick answers

What shipped in Rails on June 29, 2026?
Rails patched three separate issues where SQL queries were silently producing wrong results: `regroup` was duplicating columns, `distinct.sum` was dropping its deduplication flag in grouped queries, and `week_field` was emitting invalid ISO week strings at year boundaries. In total, 18 commits and 13 pull requests landed.
Who contributed to Rails on June 29, 2026?
1 developer shipped this update, including viralpraxis.
What were the notable Rails updates?
Deduplicate columns in `regroup`, Merge pull request #57897 from 55728/fix-regroup-deduplication, and Apply DISTINCT to a grouped `sum`.
♥

$ log @rails --recent

Attribute-read regression fixed, decimal numericality corrected 79 shipped in_order_of double-serializes values, id_value alias restored 50 shipped Inlined attribute writers, leaner ActiveRecord::Key 31 shipped MySQL 5.6 falls off the support floor as Arel stops rebuilding literals 27 shipped

$ log --all # elsewhere on the wire

Alignment & Post-training verl standardizes low-precision rollout kernels on DeepGEMM Agent Security Guardrails exposes hooks over HTTP, certifi floor raised in agent-scan

$ ls showcases/

Safety Evals AI Red Teaming Agent Security Interpretability Alignment & Post-training

$ init your-desk

RepoJournal can write one of these for any repo you care about. Sign in with GitHub, pick your repos and sources, and your desk gets a wire like this one every morning.