{
  "id": "python/pydantic-validation-error-extra-forbidden",
  "signature": "pydantic_core._pydantic_core.ValidationError: 1 validation error for Config\nuser_id\n  Extra inputs are not permitted [type=extra_forbidden, input_value='abc123', input_type=str]",
  "signature_zh": "pydantic_core._pydantic_core.ValidationError: 配置模型验证错误：不允许额外的输入字段 user_id",
  "regex": "pydantic_core\\._pydantic_core\\.ValidationError:\\ 1\\ validation\\ error\\ for\\ Config\\\nuser_id\\\n\\ \\ Extra\\ inputs\\ are\\ not\\ permitted\\ \\[type=extra_forbidden,\\ input_value='abc123',\\ input_type=str\\]",
  "domain": "python",
  "category": "data_error",
  "subcategory": null,
  "root_cause": "The model_config has extra='forbid' set, and the input data contains a field not declared in the model. Pydantic v2 defaults to 'ignore' but many projects set 'forbid' explicitly.",
  "root_cause_type": "generic",
  "root_cause_zh": "模型的 model_config 设置了 extra='forbid'，而输入数据包含未在模型中声明的字段。Pydantic v2 默认是 'ignore'，但很多项目显式设置为 'forbid'。",
  "versions": [
    {
      "version": "2.x",
      "introduced": null,
      "deprecated": null,
      "removed": null,
      "behavior_change": null,
      "status": "active"
    }
  ],
  "os_specific": {},
  "dead_ends": [
    {
      "action": "",
      "why_fails": "Works for one schema but breaks when the same dict is validated against multiple models with different allowed fields.",
      "fail_rate": 0.5,
      "condition": "",
      "sources": []
    },
    {
      "action": "",
      "why_fails": "Weakens validation across the entire app and may hide typos in field names.",
      "fail_rate": 0.65,
      "condition": "",
      "sources": []
    }
  ],
  "workarounds": [
    {
      "action": "",
      "success_rate": 0.95,
      "how": "from pydantic import BaseModel\n\nclass Config(BaseModel):\n    user_id: str\n    model_config = {'extra': 'forbid'}",
      "condition": "",
      "sources": []
    },
    {
      "action": "",
      "success_rate": 0.9,
      "how": "class Config(BaseModel):\n    model_config = {'extra': 'ignore'}",
      "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": 0.87,
  "fix_success_rate": 0.8,
  "resolvable": "true",
  "first_seen": "2024-06-20",
  "last_confirmed": "2025-01-01",
  "last_updated": "2025-01-01",
  "evidence_count": 0,
  "tags": [],
  "locale": "en",
  "aliases": []
}