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+---
+id: a99673ab-2ded-48c5-9563-30df7bf4a465
+type: workflow
+title: "PR review: paper-dynasty-database#44 — batch-fetch PitchingCardRatings N+1 fix"
+tags: [pr-reviewer, paper-dynasty-database, python, peewee, pandas, performance, n+1-queries, fix]
+importance: 0.4
+confidence: 0.8
+created: "2026-03-03T23:17:50.809941+00:00"
+updated: "2026-03-03T23:17:50.809941+00:00"
+---
+
+## PR #44 Review: batch-fetch PitchingCardRatings instead of per-row queries
+
+**Verdict**: APPROVED (posted as COMMENT — Gitea blocks self-approval)
+
+**Files reviewed**: `app/routers_v2/teams.py`
+
+**What changed**: Replaced 2N per-row `PitchingCardRatings.get_or_none()` calls with a single batch `SELECT ... WHERE pitchingcard_id IN (...)` upfront. A `ratings_map` dict keyed by `(pitchingcard_id, vs_hand)` is built once; `get_total_ops` closure does O(1) dict lookups. Applied to both `sort_pitchers()` and `sort_starters()` (inside `get_team_sp`).
+
+**Key findings**:
+- Implementation is correct — key alignment between batch fetch and lookups verified
+- Empty input edge case safe — existing `return None` guard fires before batch fetch
+- Pre-existing bug: `vlval`/`vrval` can be None → AttributeError on `.obp`/`.slg`; unchanged by this PR
+- No security issues — Peewee `<<` uses parameterized IN clause
+
+**Note**: Gitea does not allow approving your own PRs. Review posted as COMMENT state instead of APPROVED.