Who contributed to Django on June 19, 2026?

3 developers shipped this update, including ZhengKangYang, felixxm, and dependabot[bot].

What were the notable Django updates?

Fixed #37143 -- Added missing chunk_size=None check to QuerySet.aiterator(), Fixed #37168 -- Made admin display database defaults as empty values, and Changed dark mode theme switcher to FontAwesome icons. (#2652).

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DJANGO FIXES PREFETCH_RELATED ASYNC TRAP AND ADMIN DEFAULT DISPLAY BUG

By RepoJournal · Filed 06:00 UTC on June 19, 2026 · About Django

3 people shipped this

dependabot[bot] @dependabot[bot] 3 cited

ZhengKangYang @ZhengKangYang 1 cited

felixxm @felixxm 1 cited

Django patched a critical async iteration bug that silently multiplies database queries when prefetch_related is used without an explicit chunk_size parameter.

The async iterator bug [1] is the kind of silent performance killer that survives code review: QuerySet.aiterator() was missing the same validation that the synchronous iterator() received months ago, so developers using prefetch_related could accidentally trigger a query explosion without any warning. This lands alongside a fix [2] to the admin interface, where database default values now correctly display as empty rather than showing raw defaults, improving the user experience for anyone managing records with computed fields. The django/djangoproject.com team also shipped FontAwesome icon replacements [3] for the dark mode toggle, removing inline SVG sprites from the base template for cleaner rendering. On the dependency front, the site bumped codecov-action to 6.0.1 [4] which patches a template injection vulnerability (VULN-1652), requests to 2.34.2 [5], and sentry-sdk to 2.60.0 [6] for improved gen_ai span handling.

Action items

→ Review any code using prefetch_related with aiterator() - ensure chunk_size is explicitly set to avoid query spikes django/django [immediate]
→ Merge the admin defaults display fix into your next patch release django/django [plan]
→ Update codecov-action to 6.0.1 to close template injection vulnerability django/djangoproject.com [immediate]

References

[1] Fixed #37143 -- Added missing chunk_size=None check to QuerySet.aiterator(). ↗ django/django
[2] Fixed #37168 -- Made admin display database defaults as empty values. ↗ django/django
[3] Changed dark mode theme switcher to FontAwesome icons. (#2652) django/djangoproject.com
[4] Bump codecov/codecov-action from 6 to 6.0.1 ↗ django/djangoproject.com
[5] Bump requests from 2.33.1 to 2.34.2 in /requirements ↗ django/djangoproject.com
[6] Bump sentry-sdk from 2.59.0 to 2.60.0 in /requirements ↗ django/djangoproject.com

Quick answers

What shipped in Django on June 19, 2026?: Django patched a critical async iteration bug that silently multiplies database queries when prefetch_related is used without an explicit chunk_size parameter. In total, 7 commits and 10 pull requests landed.
Who contributed to Django on June 19, 2026?: 3 developers shipped this update, including ZhengKangYang, felixxm, and dependabot[bot].
What were the notable Django updates?: Fixed #37143 -- Added missing chunk_size=None check to QuerySet.aiterator(), Fixed #37168 -- Made admin display database defaults as empty values, and Changed dark mode theme switcher to FontAwesome icons. (#2652).

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