guke
c61eab610b
fix(comparison): 派生 best 无 is_best 时兜底取有价目标最低价
#195 改为只认 pricebot platforms.is_best 后, 全平台 has_dish_diff
(相似替换/仅供参考) pricebot 一个 is_best 都不标时, best_*/saved 整条落
NULL → 首页价 ¥0.0 / 记录页无最低红框 / 省额丢失 (线上占 success ~33%)。
_derive_from_platforms 增兜底: 无 is_best 但有有价目标时取最低价当参考 best,
不再让派生列静默 NULL; 复用 platforms 单源, 不引入 comparison_results 双源。
TDD: 新增 test_harvest_done_platforms_no_isbest_falls_back_to_cheapest_target
(id 3304 型), 先复现 best_platform_id=None 再修绿。
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
2026-07-30 09:21:52 +08:00
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