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+---
+id: 62d0f73d-8854-4c71-9001-60b38d438534
+type: fix
+title: "Fix: removed dead roster fields from CSV in paper-dynasty-database v1_cards_get_one"
+tags: [paper-dynasty-database, python, fastapi, fix, csv, dead-code, cards]
+importance: 0.5
+confidence: 0.8
+created: "2026-03-03T19:06:18.393440+00:00"
+updated: "2026-03-03T19:06:18.393440+00:00"
+---
+
+## Problem
+
+`v1_cards_get_one` in `app/routers_v2/cards.py` had a CSV branch that referenced `this_card.roster1.name`, `this_card.roster2.name`, and `this_card.roster3.name` — none of which exist on the `Card` model. Any `GET /api/v2/cards/{card_id}?csv=true` request would raise `AttributeError` at runtime.
+
+## Root Cause
+
+Dead fields left over from an older schema design; the `Card` model only has `player`, `team`, `pack`, `value` (plus `id`).
+
+## Solution
+
+Removed the three non-existent roster columns from both the CSV header row and data row:
+
+```python
+# Before
+data_list = [
+    ['id', 'player', 'team', 'pack', 'value', 'roster1', 'roster2', 'roster3'],
+    [..., this_card.roster1.name, this_card.roster2.name, this_card.roster3.name]
+]
+
+# After
+data_list = [
+    ['id', 'player', 'team', 'pack', 'value'],
+    [this_card.id, this_card.player, this_card.team.abbrev, this_card.pack, this_card.value]
+]
+```
+
+## Files Changed
+
+- `app/routers_v2/cards.py` — lines ~144-146
+
+## Notes
+
+- The `v1_cards_patch` endpoint still accepts `roster1_id`, `roster2_id`, `roster3_id` params that are silently ignored — dead API surface, tracked separately.
+- Project has a ruff linter hook that auto-reformats files on edit (single→double quotes, line wrapping). The functional diff was just the roster field removal.
+
+## PR
+
+PR #36: https://git.manticorum.com/cal/paper-dynasty-database/pulls/36
+Issue #35