{
  "id": "python/fastapi-request-body-missing",
  "signature": "fastapi.exceptions.RequestValidationError: Field required: 'name'",
  "signature_zh": "FastAPI请求验证错误：缺少必需字段：'name'",
  "regex": "fastapi\\.exceptions\\.RequestValidationError:\\ Field\\ required:\\ 'name'",
  "domain": "python",
  "category": "data_error",
  "subcategory": null,
  "root_cause": "请求体中缺少Pydantic模型定义的必需字段",
  "root_cause_type": "generic",
  "root_cause_zh": "请求体中缺少Pydantic模型定义的必需字段",
  "versions": [
    {
      "version": "3.x",
      "introduced": null,
      "deprecated": null,
      "removed": null,
      "behavior_change": null,
      "status": "active"
    }
  ],
  "os_specific": {},
  "dead_ends": [
    {
      "action": "在路由函数中使用默认参数",
      "why_fails": "Pydantic模型验证在路由函数之前执行",
      "fail_rate": 0.6,
      "condition": "",
      "sources": []
    },
    {
      "action": "修改模型字段为可选但保留验证",
      "why_fails": "字段变为可选后，缺少时不会报错但可能逻辑错误",
      "fail_rate": 0.4,
      "condition": "",
      "sources": []
    }
  ],
  "workarounds": [
    {
      "action": "在请求中包含所有必需字段",
      "success_rate": 0.95,
      "how": "{\"name\": \"John\", \"age\": 30}",
      "condition": "",
      "sources": []
    },
    {
      "action": "在模型中将字段设为可选并设置默认值",
      "success_rate": 0.9,
      "how": "class Item(BaseModel):\n    name: str = 'default'",
      "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": 0.84,
  "fix_success_rate": 0.8,
  "resolvable": "true",
  "first_seen": "2024-05-20",
  "last_confirmed": "2025-01-01",
  "last_updated": "2025-01-01",
  "evidence_count": 0,
  "tags": [],
  "locale": "en",
  "aliases": []
}