Fix n+1 on mailing list#1632
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.values('hash') bypassed the prefetch_related('seen_items') cache and re-hit the database once per mailing list. Using objects.all() reuses the prefetched results
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coverage: 100.0%. remained the same — mailing-list-n+1-warning into main |
jb3
approved these changes
Jul 5, 2026
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.values('hash') bypassed the prefetch_related('seen_items') cache and re-hit the database once per mailing list. Using objects.all() reuses the prefetched results