ghreprimand cfb2d17a2d Word-boundary match for snippet and subject-term ranking (#1473 follow-up) (#2556) ...

#1473 converted the title and sports-hint matches in services/search/ranking.py
to word boundaries but left two raw substring tests:

  - snippet_score: 'term in snippet.lower()' — query term 'port' hits
    'transport'/'support', inflating a result's relevance.
  - news_quality_adjustment: 't in text or t in netloc' for the subject term —
    query 'us' substring-matches 'business'/'music', so an off-topic page
    wrongly escapes the off-topic penalty on a country/subject news query.

Add a _has_word helper (the same \b...\b pattern title_score already used) and
route all three word checks (title, snippet, subject) through it, so the file
stays consistent and a future partial fix can't reintroduce the same bug class.
Pure ranking refinement: scores change only for spurious substring matches; no
API or schema change.

(cherry picked from commit 22bd23f044f191bb30e43f6b68386552817f4cc3)

Co-authored-by: ghreprimand <203024559+ghreprimand@users.noreply.github.com>

2026-06-05 08:04:31 +01:00

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