{
  "id": "go/grpc-missing-required-field",
  "signature": "rpc error: code = InvalidArgument desc = missing required field: user_id",
  "signature_zh": "rpc 错误：代码 = InvalidArgument 描述 = 缺少必填字段：user_id",
  "regex": "rpc\\ error:\\ code\\ =\\ InvalidArgument\\ desc\\ =\\ missing\\ required\\ field:\\ user_id",
  "domain": "go",
  "category": "data_error",
  "subcategory": null,
  "root_cause": "The request message does not include a field marked as required in the proto definition (though proto3 doesn't have required, custom validation may enforce it).",
  "root_cause_type": "generic",
  "root_cause_zh": "请求消息未包含 proto 定义中标记为必填的字段（尽管 proto3 没有 required，但自定义验证可能强制执行）。",
  "versions": [
    {
      "version": "1.9",
      "introduced": null,
      "deprecated": null,
      "removed": null,
      "behavior_change": null,
      "status": "active"
    }
  ],
  "os_specific": {},
  "dead_ends": [
    {
      "action": "",
      "why_fails": "Zero value may still be considered missing by validation logic.",
      "fail_rate": 0.7,
      "condition": "",
      "sources": []
    },
    {
      "action": "",
      "why_fails": "The server expects a specific field name.",
      "fail_rate": 0.9,
      "condition": "",
      "sources": []
    }
  ],
  "workarounds": [
    {
      "action": "",
      "success_rate": 1.0,
      "how": "req.UserId = \"12345\"",
      "condition": "",
      "sources": []
    },
    {
      "action": "",
      "success_rate": 0.8,
      "how": "Use optional keyword in proto3 to generate pointer fields.",
      "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": "2024-09-14",
  "last_confirmed": "2025-01-01",
  "last_updated": "2025-01-01",
  "evidence_count": 0,
  "tags": [],
  "locale": "en",
  "aliases": []
}