{
  "id": "python/pydantic-settings-env-not-loaded",
  "signature": "pydantic_core._pydantic_core.ValidationError: 1 validation error for Settings\ndatabase_url\n  Field required [type=missing, input_value={}, input_type=dict]",
  "signature_zh": "pydantic_core._pydantic_core.ValidationError：1 个验证错误（Settings）\ndatabase_url\n  字段必填 [type=missing, input_value={}, input_type=dict]",
  "regex": "pydantic_core\\._pydantic_core\\.ValidationError:\\ 1\\ validation\\ error\\ for\\ Settings\\\ndatabase_url\\\n\\ \\ Field\\ required\\ \\[type=missing,\\ input_value=\\{\\},\\ input_type=dict\\]",
  "domain": "python",
  "category": "config_error",
  "subcategory": null,
  "root_cause": "pydantic-settings reads env vars at instantiation; the variable name case or prefix doesn't match, or .env file isn't loaded.",
  "root_cause_type": "generic",
  "root_cause_zh": "pydantic-settings 在实例化时读取环境变量；变量名大小写或前缀不匹配，或未加载 .env 文件。",
  "versions": [
    {
      "version": "2.x",
      "introduced": null,
      "deprecated": null,
      "removed": null,
      "behavior_change": null,
      "status": "active"
    }
  ],
  "os_specific": {},
  "dead_ends": [
    {
      "action": "",
      "why_fails": "Still requires the var to be present in os.environ at import time.",
      "fail_rate": 0.45,
      "condition": "",
      "sources": []
    },
    {
      "action": "",
      "why_fails": "Defeats the purpose of env-driven config; secrets end up in source.",
      "fail_rate": 0.6,
      "condition": "",
      "sources": []
    },
    {
      "action": "",
      "why_fails": "Runs after field resolution; too late for required-field errors.",
      "fail_rate": 0.5,
      "condition": "",
      "sources": []
    }
  ],
  "workarounds": [
    {
      "action": "",
      "success_rate": 0.95,
      "how": "from pydantic_settings import BaseSettings, SettingsConfigDict\nclass Settings(BaseSettings):\n    model_config = SettingsConfigDict(env_file='.env', case_sensitive=False)\n    database_url: str",
      "condition": "",
      "sources": []
    },
    {
      "action": "",
      "success_rate": 0.9,
      "how": "export DATABASE_URL=postgres://...\npython -c 'import os; print(os.environ.get(\"DATABASE_URL\"))'",
      "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": 0.86,
  "fix_success_rate": 0.8,
  "resolvable": "true",
  "first_seen": "2024-09-27",
  "last_confirmed": "2025-01-01",
  "last_updated": "2025-01-01",
  "evidence_count": 0,
  "tags": [],
  "locale": "en",
  "aliases": []
}