{
  "id": "python/fastapi-query-param-error",
  "signature": "fastapi.exceptions.RequestValidationError: 422 - query parameter 'page' must be greater than or equal to 1",
  "signature_zh": "fastapi.exceptions.RequestValidationError: 422 - 查询参数 'page' 必须大于或等于 1",
  "regex": "fastapi\\.exceptions\\.RequestValidationError:\\ 422\\ \\-\\ query\\ parameter\\ 'page'\\ must\\ be\\ greater\\ than\\ or\\ equal\\ to\\ 1",
  "domain": "python",
  "category": "data_error",
  "subcategory": null,
  "root_cause": "查询参数不符合定义的约束条件，如最小值为 1。",
  "root_cause_type": "generic",
  "root_cause_zh": "查询参数不符合定义的约束条件，如最小值为 1。",
  "versions": [
    {
      "version": "3.x",
      "introduced": null,
      "deprecated": null,
      "removed": null,
      "behavior_change": null,
      "status": "active"
    }
  ],
  "os_specific": {},
  "dead_ends": [
    {
      "action": "",
      "why_fails": "忽略错误，不检查参数值。",
      "fail_rate": 0.8,
      "condition": "",
      "sources": []
    },
    {
      "action": "",
      "why_fails": "尝试在前端限制，但后端仍不验证。",
      "fail_rate": 0.6,
      "condition": "",
      "sources": []
    },
    {
      "action": "",
      "why_fails": "修改约束但忘记更新文档。",
      "fail_rate": 0.7,
      "condition": "",
      "sources": []
    }
  ],
  "workarounds": [
    {
      "action": "",
      "success_rate": 0.95,
      "how": "使用 Query(ge=1) 定义参数约束。",
      "condition": "",
      "sources": []
    },
    {
      "action": "",
      "success_rate": 0.9,
      "how": "添加全局验证错误处理器返回清晰消息。",
      "condition": "",
      "sources": []
    },
    {
      "action": "",
      "success_rate": 0.85,
      "how": "在客户端和服务器端都进行验证。",
      "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": 0.85,
  "fix_success_rate": 0.8,
  "resolvable": "true",
  "first_seen": "2024-02-25",
  "last_confirmed": "2025-01-01",
  "last_updated": "2025-01-01",
  "evidence_count": 0,
  "tags": [],
  "locale": "en",
  "aliases": []
}