{
  "id": "python/fastapi-path-operation-conflict",
  "signature": "ValueError: Duplicate path operation: GET /items/{item_id}",
  "signature_zh": "值错误: 重复的路径操作: GET /items/{item_id}",
  "regex": "ValueError:\\ Duplicate\\ path\\ operation:\\ GET\\ /items/\\{item_id\\}",
  "domain": "python",
  "category": "config_error",
  "subcategory": null,
  "root_cause": "FastAPI中定义了多个相同HTTP方法和路径的路由。",
  "root_cause_type": "generic",
  "root_cause_zh": "FastAPI中定义了多个相同HTTP方法和路径的路由。",
  "versions": [
    {
      "version": "3.x",
      "introduced": null,
      "deprecated": null,
      "removed": null,
      "behavior_change": null,
      "status": "active"
    }
  ],
  "os_specific": {},
  "dead_ends": [
    {
      "action": "尝试覆盖路由而不删除旧路由",
      "why_fails": "FastAPI不允许重复注册。",
      "fail_rate": 0.9,
      "condition": "",
      "sources": []
    },
    {
      "action": "使用不同的函数名但相同的路径和方法",
      "why_fails": "路径和方法是唯一标识。",
      "fail_rate": 0.8,
      "condition": "",
      "sources": []
    }
  ],
  "workarounds": [
    {
      "action": "确保每个路径和方法组合唯一",
      "success_rate": 0.95,
      "how": "@app.get('/items/{item_id}') async def read_item(item_id: int): return {'item_id': item_id}; @app.post('/items/{item_id}') async def update_item(item_id: int): return {'updated': item_id}",
      "condition": "",
      "sources": []
    },
    {
      "action": "使用不同的路径或添加版本前缀",
      "success_rate": 0.9,
      "how": "@app.get('/v1/items/{item_id}') async def read_item_v1(item_id: int): return {'item_id': item_id}",
      "condition": "",
      "sources": []
    }
  ],
  "workarounds_zh": [],
  "transition_graph": {
    "leads_to": [],
    "preceded_by": [],
    "frequently_confused_with": []
  },
  "official_doc_url": null,
  "official_doc_section": null,
  "error_code": null,
  "verification_tier": "ai_generated",
  "confidence": 0.88,
  "fix_success_rate": 0.8,
  "resolvable": "true",
  "first_seen": "2024-07-05",
  "last_confirmed": "2025-01-01",
  "last_updated": "2025-01-01",
  "evidence_count": 0,
  "tags": [],
  "locale": "en",
  "aliases": []
}