{
  "id": "python/pydantic-required-field-missing",
  "signature": "pydantic.error_wrappers.ValidationError: 1 validation error for Model\nfield\n  Field required [type=missing, input_value={}, input_type=dict]",
  "signature_zh": "pydantic.error_wrappers.ValidationError: Model 的 1 个验证错误\nfield\n  缺少必填字段 [type=missing, input_value={}, input_type=dict]",
  "regex": "pydantic\\.error_wrappers\\.ValidationError:\\ 1\\ validation\\ error\\ for\\ Model\\\nfield\\\n\\ \\ Field\\ required\\ \\[type=missing,\\ input_value=\\{\\},\\ input_type=dict\\]",
  "domain": "python",
  "category": "data_error",
  "subcategory": null,
  "root_cause": "A field without a default value is not provided during model instantiation, causing a missing field error.",
  "root_cause_type": "generic",
  "root_cause_zh": "实例化模型时未提供没有默认值的字段，导致缺少字段错误。",
  "versions": [
    {
      "version": "2.x",
      "introduced": null,
      "deprecated": null,
      "removed": null,
      "behavior_change": null,
      "status": "active"
    }
  ],
  "os_specific": {},
  "dead_ends": [
    {
      "action": "",
      "why_fails": "Setting default=None makes field optional, but if None is not valid for the type, it may still fail.",
      "fail_rate": 0.5,
      "condition": "",
      "sources": []
    },
    {
      "action": "",
      "why_fails": "model_construct skips validation but may leave fields unset, causing issues later.",
      "fail_rate": 0.8,
      "condition": "",
      "sources": []
    }
  ],
  "workarounds": [
    {
      "action": "",
      "success_rate": 1.0,
      "how": "Provide the field during instantiation: Model(field='value')",
      "condition": "",
      "sources": []
    },
    {
      "action": "",
      "success_rate": 0.95,
      "how": "Add a default value: field: 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": 0.88,
  "fix_success_rate": 0.8,
  "resolvable": "true",
  "first_seen": "2024-02-10",
  "last_confirmed": "2025-01-01",
  "last_updated": "2025-01-01",
  "evidence_count": 0,
  "tags": [],
  "locale": "en",
  "aliases": []
}